sinopseV3n3.pdf - FEEC - Unicamp

Editorial 

This is the thrird issue of the second volume of ―SINOPSE DA 

FEEC‖ – the Academic Bulletin of the School of Electrical and 

Computer Engineering (FEEC) of the University of Campinas 

(Unicamp). In this issue we summarize the main academic 

results of FEEC’s faculty work in the third quadrimester of 

2010. 

The ―SINOPSE DA FEEC‖ is divided into sections that group 

abstracts of same type of work: Article in journals, Article in 

proceedings, Book editions, Book Chapter, Scientific Event 

Organization, Patents, Short courses in events, Master’s 

dissertations, and Doctoral theses. In each section the abstracts 

are sorted by research area: Automation; Biomedical 

Engineering; Computer Engineering; Electronic, 

Microelectronic, Opto-electronic; Electrical energy; and 

Telecommunication-Telematic. 

Compiling the results we present the abstracts of thirty articles 

in journals, one hundred eighty one articles in event 

proceedings, one book edition, and two book chapter. We also 

emphasize the organization of one scientific event and one short 

course in scientific events. Two final sections present the 

abstracts of twenty one master dissertations and eleven doctoral 

theses defended in this period. 

This and other issues and the previous volume of the Sinopse are 

available at FEEC’s web site (www.feec.unicamp.br/sinopse). 

There, it is possible to access the complete text of articles that 

have a DOI register. 

The master dissertation and doctoral thesis complete texts are 

available at Unicamp’s Engineering Library web page (BAE), at 

http://libdigi.unicamp.br/document/list.php?tid=42. 

All dissertation and theses are written in Portuguese. 

In this last issue of the year, we would like to thank everyone 

that contributed to make this volume so plentiful. Our special 

thanks to all secretaries that helped us to produce it. We thank 

the authors and the new Masters and Doctors, and acknowledge 

all by listing their names at the end of this issue. 

José Raimundo de Oliveira 

FEEC Associate Director 

Article in journal 

SINOPSE DA FEEC 

Volume 3 - Number 3 

September-December 2010 

Academic Bulletin of FEEC-UNICAMP 

Automation 

A new method for robust Schur stability analysis 

Maurício C. Oliveira, Ricardo Coração de Leão Fontoura de 

Oliveira, Pedro Luis Dias Peres 

International Journal of Control 

ISSN: 0020-7179 v:83 n:10 Oct-2010 pp:2181-2192 

doi: 10.1080/00207179.2010.511274 

Abstract: This article is concerned with robust stability of 

uncertain discrete-time linear systems. The matrix defining the 

linear system (system matrix) is assumed to depend affinely on 

a set of time-invariant unknown parameters lying on a known 

polytope. Robust stability is investigated by checking whether a 

certain integer power κ of the uncertain system matrix has 

spectral norm less than one. This peculiar stability test is shown 

to be equivalent to the positivity analysis of a homogeneous 

symmetric matrix polynomial with precisely known coefficients 

and degree indexed by κ. A unique feature is that no extra 

variables need to be added to the problems being solved. 

Numerical experiments reveal that the value of κ needed to test 

53 

robust stability is mostly independent of the system dimension 

but grows sharply as the eigenvalues of the uncertain system 

approach the unit circle. By identifying the proposed stability 

test with a particular choice of a parameter-dependent 

Lyapunov function, extra variables can be introduced, yielding 

linear matrix inequalities optimisation problems of improved 

convergence. 

Keywords: robust stability, discrete-time systems, 

parameter-dependent Lyapunov functions, linear matrix 

inequalities 

Consciência Artificial 

Ricardo Ribeiro Gudwin 

Revista Médica de Minas Gerais 

ISSN: 0103-880X 

Set-2010 pp:33-33 

Abstract: A idéia de se construir um agente computacional 

consciente é bastante ousada, tanto do ponto de vista científico 

como filosófico, principalmente porque a própria natureza do 

que é esse fenômeno -"consciência" ainda se encontra cercada 

de muitas dúvidas e problemas.Apesar disso, nos últimos 

quinze anos tem havido um crescimento significativo no estudo 

científico da consciência. Uma vertente tecnológica destes 

estudos é a área de pesquisas em consciência artificial. Diversos 

pesquisadores apresentaram propostas bastante diferentes entre 

si para a criação de sistemas artificiais conscientes. Dentre as 

diversas propostas, e ignorando aquelas que poderiam ser 

classificadas como "ingênuas", a que nos parece mais 

solidamente lastreada em uma sólida teoria científica da 

consciência é o framework computacional sendo desenvolvido 

por Stan Franklin, da Universidade de Memphis, nos USA, que 

é baseada no modelo de consciência de Bernard Baars, também 

conhecido como a Teoria do Espaço de Trabalho Global 

(Global Workspace Theory). Lastreado sob o ponto de vista 

científico pela teoria de Baars, Franklin desenvolveu, sob uma 

perspectiva tecnológica, um framework computacional que 

pode ser classificado, ao mesmo tempo, como uma prova de 

conceito de uma teoria científica e uma nova abordagem para a 

construção de agentes inteligentes. Nesta apresentação, 

pretendemos analisar e avaliar a arquitetura que chamamos aqui 

de arquitetura Baars-Franklin (ABF), uma arquitetura que vem 

sendo desenvolvida conjuntamente por Baars e Franklin nos 

últimos 10 anos.Baars desenvolveu sua Teoria do Espaço de 

Trabalho Global (TETG)inspirado na psicologia, e baseado em 

testes empíricos advindos da ciência cognitiva e da 

neurociência. A TETG é uma teoria unificada queagrega 

diversas hipóteses anteriores sobre a mente e a consciência 

humanas.Em sua teoria, Baars, postula que processos como 

atenção, seleção deação, automatização do comportamento, 

aprendizagem, meta-cognição, emoção e outras operações 

cognitivas são implementadas por um grande número de 

processadores especializados e inconscientes distribuídos 

globalmente no cérebro (algo que Edelman classificaria como 

"grupos neurais"). Cada processador é autônomo, eficiente, e 

trabalha em paralelo e em alta velocidade. Para realizar suas 

tarefas, cada processador necessita de um conjunto de recursos 

(basicamente algum tipo de informação), e da mesma forma 

gerará como resultado de sua atividade um outro conjunto de 

recursos, depois de seu processamento.Processadores 

especializados podem cooperar entre si, formando coalizões. 

Esta cooperação se dá por meio do fornecimento dos recursos 

necessários, por parte de um processador para que outro 

processador possa executar suas tarefas. Desta forma, trocam

ecursos escrevendo e lendo de lugares específicos em uma 

memória de trabalho. Essas coalizões podem formar grandes 

redes complexas, onde processadores fornecem informações a 

outros processadores. Entretanto, dentro de uma coalizão, os 

processadores só têm acesso a uma informação local. Podem 

haver situações em que a informação necessária a um 

processador não esteja disponível na própria coalizão. De forma 

a tratar de situações como esta, implementando um sistema de 

comunicação global entre todos os processadores, existe um 

espaço de trabalho global, onde processadores podem realizar o 

broadcast de seus requisitos a todos os outros processadores. 

Podem haver situações também onde um processador pode 

anunciar o tipo de recurso que gera, de forma que outros 

processadores interessados possam tomar ciência e usufruir 

destes recursos. Estes processadores podem então utilizar-se do 

espaço de trabalho global para fazer o broadcast com essa 

informação a todos os outros processadores. Nessa dinâmica de 

broadcast, somente uma única coalizão pode escrever no espaço 

de trabalho global em um determinado instante de tempo. De 

forma a decidir qual coalizão terá esse privilégio, todo um 

processo de competição entre processadores é disparado. Cada 

processador possui um nível de ativação, que expressa a 

urgência em obter uma determinada informação ou a 

importância da informação que é capaz de gerar. O nível de 

ativação de toda uma coalizão é a média dos níveis de ativação 

de seus participantes. A cada instante de tempo, a coalizão com 

o maior nível de ativação ganha o acesso ao espaço de trabalho 

global. Uma vez que ganhe este acesso, todos seus 

processadores passam a fazer o broadcast de suas requisições e 

anúncios. Esse processo de broadcast permite a formação de 

novas coalizões, e também a mudança em coalizões que já 

estão funcionando.Para Baars, a consciência está relacionada 

com o funcionamento do espaço de trabalho global. Os 

processadores são normalmente inconscientes, tendo acesso 

somente a informação local. Mas, em alguns casos, eles podem 

precisar ou anunciar informação global, caso em que requisitam 

acesso à consciência. Uma vez dentro da consciência, eles 

podem efetuar o broadcast a todos os outros processadores. Este 

é ocaso em que uma informação não-usual, urgente ou 

particularmente relevante deve ser propagada ou requisitada. 

Desta forma, o mecanismo de consciência provê um papel 

integrativo e mobilizador. Além disso, o mecanismo de 

consciência também pode ser útil quando tarefas automáticas 

(inconscientes) não são capazes de lidar com uma situação em 

particular, e portanto demandam uma estratégia especializada 

para sua resolução. Coalizões executivas, especializadas em 

resolver problemas podem ser recrutadas de tal forma a lidar 

com estas situações especiais delegando problemas triviais a 

outras coalizões inconscientes. Desta forma, a consciência age 

como um filtro, recebendo somente informação emergencial ou 

especialmente relevante.Inspirado na descrição de Baars de sua 

teoria de consciência, e também em trabalhos anteriores na 

literatura de computação, Franklin propôs um framework 

computacional para um agente de software que implementa a 

teoria de Baars em uma arquitetura computacional, a 

ABF.Nosso intuito com essa palestra, é analisar a arquitetura 

ABF, e entender o significado de "consciência" que pode ser 

atribuído a essa arquitetura. Da mesma forma, apresentaremos 

uma análise das potenciais vantagens que o uso dessa 

arquitetura em um sistema computacional pode trazer. 

Keywords: Consciência Artificial, Arquiteturas 

Cognitivas, Cognição Artificial. 

Developing a Consciousness-Based Mind for an 

Artificial Criature 

Ricardo Capitanio Martins da Silva, Ricardo Ribeiro Gudwin 

Lecture Notes in Computer Science 

ISSN: 0302-9743 v:6404 Oct-2010 pp:122-132 

doi: 10.1007/978-3-642-16138-4_13 

Abstract: This work describes the application of the Baars- 

Franklin Architecture (BFA), an artificial consciousness 

approach, to synthesize a mind (a control system) for an 

artificial creature. Firstly we introduce the theoretical 

foundations of this approach for the development of a 

conscious agent. Then we explain the architecture of our agent 

and at the end we discuss the results and first impressions of 

this approach. 

Markov Jump Linear Systems and Filtering 

Through Network Transmitted Measurements 

Alim Pedro de Castro Gonçalves, André R. Fioravanti, José 

Claudio Geromel 

Signal Processing (Print) 

ISSN: 0165-1684 v:90 n:10 Oct-2010 pp:2842-2850 

doi: 10.1016/j.sigpro.2010.04.007 

Abstract: This paper addresses how several models available 

for a measurement transmission network channel, like the 

generalized Gilbert-Elliot, Fritchman or McCullough ones, 

from a linear and time invariant plant to its filter can be 

incorporated into the more general framework of Markov jump 

linear systems filtering. Combined with transmission protocols 

that allow package failure recognition, the particular concept of 

cluster availability of the Markov modes becomes appealing. 

Numerical examples are explored to show applicability of the 

results. The design of the filter is done using linear matrix 

inequalities (LMIs). 

Keywords: Discrete-time Markov jump linear systems, 

Network filtering, Linear matrix inequalities 

Neural network ensembles: immune-inspired 

approaches to the diversity of components 

Rodrigo Pasti, Leandro Nunes de Castro Silva, Guilherme 

Palermo Coelho, Fernando Jose Von Zuben 

Natural Computing 

ISSN: 1567-7818 v:9 n:3 Sep-2010 pp:625-653 

doi: 10.1007/s11047-009-9124-1 

Abstract: This work applies two immune-inspired algorithms, 

namely opt-aiNet and omni-aiNet, to train multi-layer 

perceptrons (MLPs) to be used in the construction of ensembles 

of classifiers. The main goal is to investigate the influence of 

the diversity of the set of solutions generated by each of these 

algorithms, and if these solutions lead to improvements in 

performance when combined in ensembles. omni-aiNet is a 

multi-objective optimization algorithm and, thus, explicitly 

maximizes the components’ diversity at the same time it 

minimizes their output errors. The opt-aiNet algorithm, by 

contrast, was originally designed to solve single-objective 

optimization problems, focusing on the minimization of the 

output error of the classifiers. However, an implicit diversity 

maintenance mechanism stimulates the generation of MLPs 

with different weights, which may result in diverse classifiers. 

The performances of opt-aiNet and omni-aiNet are compared 

with each other and with that of a second-order gradient-based 

algorithm, named MSCG. The results obtained show how the 

different diversity maintenance mechanisms presented by each 

algorithm influence the gain in performance obtained with the 

use of ensembles. 

Keywords: Ensembles of classifiers, Diversity of 

components, Artificial immune systems, Multi-layer 

perceptrons, Multi-objective optimization 

On the cutting stock problem under stochastic 

demand 

Douglas José Alem, Pedro Augusto Munari, Marcos Nereu 

Arenales, Paulo Augusto Valente Ferreira 

Annals of Operation Research 

ISSN: 0254-5330 v:179 n:1 Sep-2010 pp:169-186 

doi: 10.1007/s10479-008-0454-7 

Abstract: This paper addresses the one-dimensional cutting 

stock problem when demand is a random variable. The problem 

is formulated as a two-stage stochastic nonlinear program with 

recourse. The first stage decision variables are the number of 

54 Sinopse da FEEC

objects to be cut according to a cutting pattern. The second 

stage decision variables are the number of holding or 

backordering items due to the decisions made in the first stage. 

The problem’s objective is to minimize the total expected cost 

incurred in both stages, due to waste and holding or 

backordering penalties. A Simplex-based method with column 

generation is proposed for solving a linear relaxation of the 

resulting optimization problem. The proposed method is 

evaluated by using two well-known measures of uncertainty 

effects in stochastic programming: the value of stochastic 

solution—VSS—and the expected value of perfect 

information—EVPI. The optimal two-stage solution is shown 

to be more effective than the alternative wait-and see and 

expected value approaches, even under small variations in the 

parameters of the problem. 

Keywords: Cutting stock problems, Stochastic 

programming, Linear optimization, Column generation 

Performance comparasion of artificial neural 

networks and expert systems applied to flow 

pattern identificdation in vertical ascendant gasliquid 

flows 

Eugênio Spanio Rosa, Ricardo Menezes Salgado, Takaaki 

Ohishi, Niederauer Mastelari 

International Journal of Multiphase Flow 

ISSN: 0301-9322 v:36 n:9 Sep-2010 pp:738-754 

doi: 10.1016/j.ijmultiphaseflow.2010.05.001 

Abstract: Instantaneous readouts of an electrical resistivity 

probe are taken in an upward vertical air–water mixture. The 

signals are further processed to render the statistical moments 

and the probability density functions here used as objective 

flow pattern indicators. A series of 73 experimental runs have 

its flow pattern identified by visual inspection assisted by the 

analyses of the void fraction’s trace and associated probability 

density function. The flow patterns are classified into six 

groups and labeled as: bubbly, spherical cap, slug, unstable 

slug, semi-annular and annular. This work compares and 

analyzes the performance of artificial neural networks, ANN, 

and expert systems to flow pattern identification. The employed 

ANNs are Multiple Layer Perceptrons, Radial Basis Functions 

and Probabilistic Neural Network, with single and multiple 

outputs. The performance is gauged by the percentage of right 

identifications based on experimental observation. The analysis 

is extended to clustering algorithms to assist the formation of 

knowledge base employed during the learning stages of the 

ANNs and expert systems. The performance of the following 

clustering algorithms: self organized maps, K-means and Fuzzy 

C-means are also tested against experimental data. 

Keywords: Flow pattern recognition, Clustering 

algorithms, Neural networks, Impedance sensor 

Electronic, Micro-electronic, Opto-electronic 

Characterization and breakdown of the 

electricity bill using custom smart meters: a tool 

for energy-efficiency programs 

Luís Fernando Caparroz Duarte, José Douglas Bertazzoni 

Zambianco, Douglas Airoldi, Elnatan Chagas Ferreira, Jose 

Antonio Siqueira Dias 

International Journal of Circuits, Systems and Signal 

Processing 

ISSN: 1998-4464 v:5 n:2 Dec-2010 pp:116-123 

Abstract: Understanding and monitoring the electrical energy 

use is fundamental to encourage consumers and small business 

owners to implement energy-efficiency measures and, 

therefore, to cut their energy bills significantly. This works 

presents the design, development and implementation of an 

electrical energy monitoring sensor network which can be 

easily installed to measure and monitor the energy use of every 

appliance in a house, presenting to the consumer a detailed 

report of the energy spent by each electrical device (TV, lights, 

showers, etc.). The measuring units and a coordinator form a 

wireless network, which is capable of measuring the electrical 

energy and recording the data of each home appliance in the 

flash memory of the coordinator. The data stored in the 

coordinator is sent (via a wireless connection) to a computer 

where the analysis of the data is performed and a detailed report 

of the energy breakdown is presented. 

Keywords: PLC, Power meter, Sensor network, ZigBee 

Fabrication and electrical performance of highdensity 

arrays of nanometric silicon tips 

Edson José de Carvalho, Marco Antonio Robert Alves, 

Edmundo da Silva Braga, Lucila Helena Deliesposte Cescato 

Microelectronic Engineering 

ISSN: 0167-9317 v:67 n:12 Dec-2010 pp:2544-2548 

doi: 10.1016/j.mee.2010.06.046 

Abstract: We propose and demonstrate a simple and low cost 

process for the fabrication of large area arrays of nanometric 

silicon tips, for use as Field Emission Devices (FEDs). The 

process combines Interference Lithography (IL) with isotropic 

Reactive Ion Etching (RIE). Si tips with typical curvature 

radius of 20 nm and height of 900 nm were recorded with a 

periodicity of 1 μm (density of 106 tips/mm2) covering a 

Silicon wafer of 2 in. The measurement of the electrical 

performance of the arrays demonstrates the feasibility of the 

association of these two techniques for recording Field 

Emission Tips. 

Keywords: Interference Lithography, Reactive Ion 

Etching (RIE), Silicon tips, Field Emission Devices 

In vivo preliminary evaluation of Bone- 

Microcrystalline and Bone-Nanocrystalline 

Diamond Interfaces 

Ana Amélia Rodrigues, Vitor Baranauskas, Helder José 

Ceragioli, Alfredo Carlos Peterlevitz, William Dias Belangero 

Diamond and Related Materials 

ISSN: 0925-9635 v:19 n:10 Oct-2010 pp:1300-1306 

doi: 10.1016/j.diamond.2010.06.016 

Abstract: Chemical vapor deposited diamond is a new 

potential biomedical material which has the advantage of 

chemical inertness, extreme hardness and low coefficient of 

friction, among others. In orthopedics and maxillofacial 

surgery, these properties could improve implant performance, 

reducing metallic corrosion, particle wear, inflammatory 

reactions and bone loss. In the present study, two types of 

chemical vapor deposition (CVD) diamonds have been 

analyzed: microcrystalline diamonds (MD) and nanocrystalline 

diamonds (ND), both produced by hot-filament chemical vapor 

deposition. The diamond tubes were previously characterized 

by scanning electron microscopy (SEM), atomic force 

microscopy (AFM) and Raman scattering spectroscopy (RSS). 

The aim of this study was to verify the interface between bone 

and MD and ND, surgically implanted in the femoral diaphysis 

of Wistar rats, after 4 and 8weeks. The outcome was evaluated 

by scanning electron and optical microscopy using a semi 

quantitative method. The results suggest that nanocrystalline 

diamonds (ND) elicits a richer biological response than 

microcrystalline diamonds (MD) when in interaction with bone. 

Keywords: Chemical vapor deposited diamond, 

Biomaterials, Implants, Bone prostheses 

Nano-Ni addition to MgB2: effects on the 

superconducting properties 

Oscar de Lima, Kleber Betini Vieira, V.P.S. AWANA, H. 

Kishan, Edson Moschim 

Journal of Materials Science 

ISSN: 4895-5134 v:45 n:18 Sep-2010 pp:4929-4933 

doi: 10.1007/s10853-010-4388-5 

Abstract: Samples of MgB2 pure phase, with Ni nanoparticles 

addition, were prepared using a solid diffusion reaction method. 

Clearly, the Ni nanoparticles act as effective pinning centers 

Academic Bulletin of FEEC-Unicamp 55

and enhance the critical current density values, especially for a 

sample with 0.5%Ni. A negligible amount of Ni diffuses inside 

the MgB2 grains, thus having a small effect on the transition 

temperature, which remains around 37.5 K. 

Optical Amplitude Modulation Extinction by a 

Deep Saturated Ultra-Long Semiconductor 

Optical Amplifier 

Napoleão S. Ribeiro, André L. R. Cavacalcante, Cristiano M. 

Gallep, Evandro Conforti 

Optics Express 

ISSN: 1094-4087 v:18 n:26 Dec-2010 pp:27298-27305 

doi: 10.1364/OE.18.027298 

Abstract: The recovery of an optical carrier with the deletion 

of its amplitude modulation is introduced using a deeply 

saturated ultra-long semiconductor optical amplifier (UL-SOA). 

The experimental results were achieved for input signal bit 

rates up to 12.5 Gbps with high extinction ratio (up to 13.9 dB). 

The influence of parameters such as UL-SOA bias current, 

optical bandwidth, signal input power, modulation depth and 

bit rate are analyzed including the carrier spectral broadening 

effects due to the self-phase modulation effect. 

Tridimensional Yagi antenna: shaping radiation 

pattern with a non-planar array 

Juliano Rodrigues Brianeze, Arismar Cerqueira Sodre Jr., 

Hugo Enrique Hernández Figueroa 

IET Microwaves, Antennas & Propagation 

ISSN: 1751-8725 v:4 n:9 Sep-2010 pp:1434-1441 

doi: 10.1049/iet-map.2009.0480 

Abstract: This work presents the concept and development of 

the tridimensional Yagi antenna, which is a novel type of Yagi 

antenna operating in P band. It is idealised from two other types 

of Yagi antennas: Quasi-Yagi and Yagi-Uda. The resultant 

antenna is based on a microstrip balun, as in the first, and its 

driver and directors are made from metal tubes, as in the 

second, both integrated to a reflecting plane. The key point of 

this new antenna model is its asymmetric and reconfigurable 

radiation pattern and therefore the possibility of a high rejection 

between sectors in a plane. This feature was accomplished with 

the new concept of progressive rotation of directors around the 

driver. The authors present a design methodology to adjust 

return loss and radiation pattern characteristics. The final 

prototype presents 9.4 dB gain at 450 MHz and 47% bandwidth 

centred at 425 MHz. 

Keywords: tridimensional Yagi antenna, radiation 

pattern, nonplanar antenna array, quasi Yagi antenna, 

Yagi-Uda antenna, microstrip balun, gain 9.4 dB, 

frequency 450 MHz, bandwidth 425 MHz 

Biomedical Engineering 

Functional antagonism of β-adrenoceptor 

subtypes in the catecholamine-induced 

automatism in rat myocardium 

D.C. Boer, José Wilson Magalhães Bassani, Rosana Almada 

Bassani 

British Journal of Pharmacology 

ISSN: 1476-5381 

Nov-2010 

doi: 10.1111/j.1476-5381.2010.01121.x. 

Abstract: Background and purpose. Myocardial automatism 

and arrhythmias may ensue during strong sympathetic 

stimulation. We sought to investigate the relevant types of 

adrenoceptor, as well as the role of phosphodiesterase (PDE) 

activity, in the production of catecholaminergic automatism in 

atrial and ventricular rat myocardium. Experimental approach. 

The effects of adrenoceptor agonists on the rate of spontaneous 

contractions (automatic response) and the amplitude of 

electrically-evoked contractions (inotropic response) were 

determined in left atria and ventricular myocytes isolated from 

Wistar rats. Key results. Catecholaminergic automatism was 

Ca(2+) -dependent, as it required a functional sarcoplasmic 

reticulum to be exhibited. Although both á- and â adrenoceptor 

activation caused inotropic stimulation, only β(1) adrenoceptors 

seemed to mediate the induction of spontaneous activity. 

Catecholaminergic automatism was enhanced and suppressed 

by β(2) adrenoceptor blockade and stimulation, respectively. 

Inhibition of either PDE3 or PDE4 (by milrinone and rolipram, 

respectively) potentiated the automatic response of myocytes to 

catecholamines. However, only rolipram abolished the 

attenuation of automatism produced by β(2) adrenoceptor 

stimulation. Conclusions and Implications. α- and β(2) - 

adrenoceptors do not seem to be involved in the mediation of 

catecholaminergic stimulation of spontaneous activity in atrial 

and ventricular myocardium. However, a functional antagonism 

of β(1) - and β(2) adrenoceptor activation was identified, the 

former mediating catecholaminergic myocardial automatism, 

and the latter attenuating this effect. Results suggest that 

hydrolysis of cAMP by PDE4 is involved in the protective 

effect mediated by β(2) adrenoceptor stimulation. 

Keywords: arrhythmias, PDE, β(2) adrenoceptors 

Wrist Movement Characterization by 

Mechanomyography Technique 

Eduardo Mendonça Scheeren, Eddy Krueger, Guilherme 

Nogueira, Percy Nohama, Vera Lucia da Silveira Nantes 

Button 

Journal of Medical and Biological Engineering 

ISSN: 1609-0985 v:30 n:6 Sep-2010 pp:373-380 

doi: 10.5405/jmbe.757 

Abstract: Mechanomyography (MMG) monitors the 

oscillations caused by muscle contraction. Muscle contractions 

generate motion artifacts which can significantly affect signal 

processing of MMG. In order to avoid such interference during 

signal analysis, one can respect a time delay (TD) after the 

onset of contraction (OC). This study aimed to identify wrist 

antagonist movements from signals recorded with MMG 

sensors. The distinction was performed after evaluating the 

correlation between windows of interest in signals between 0.2 

s after OC (0.2 AOC) and 1.0 s after OC (1.0 AOC). Twelve 

volunteers performed concentric wrist contractions: flexion and 

ulnar deviation (inner side) and extension and radial deviation 

(outer side). Two triaxial MMG sensors were placed on the 

inner and outer sides of the forearm. The features used in the 

analysis of MMG signals were root mean square (RMS), 

number of zero-crossings, peak counting and the multiplication 

RMS times number of zero-crossings (RZ). Two analysis 

window lengths (0.25 s and 0.5 s) were evaluated. ANOVA 

tests indicated that flexion was different from extension, ulnar 

and radial deviation, and radial deviation was different from 

ulnar deviation and flexion. The results suggest that it is 

possible to identify whether the movements are antagonistic 

and to distinguish movements from the same side. There were 

strong correlations between the acquired signals and TD, 

mainly the devised RZ feature (0.81~0.95). This study 

proposed an approach to determine whether triaxial MMG 

features can be used for motor prosthesis control. The triaxial 

modulus presented strong correlations for all movements and 

can be useful in future applications. 

Keywords: TAccelerometer, Prosthesis control, Upper 

limb 

Computer Engineering 

Watershed from propagated markers: An 

interactive method to morphological object 

segmentation in image sequences 

Franklin César Flores, Roberto de Alencar Lotufo 

Image and Vision Computing 

ISSN: 0262-8856 v:28 n:11 Nov-2010 pp:1491-1514 

doi: 10.1016/j.imavis.2009.06.015 

Abstract: In this paper, it is introduced an interactive method 

to object segmentation in image sequences, by combining 


classical morphological segmentation with motion estimation – 

the watershed from propagated markers. In this method, the 

objects are segmented interactively in the first frame and the 

mask generated by its segmentation provides the markers that 

will be used to track and segment the object in the next frame. 

Besides the interactivity, the proposed method has the 

following important characteristics: generality, rapid response 

and progressive manual edition. This paper also introduces a 

new benchmark to do quantitative evaluation of assisted object 

segmentation methods applied to image sequences. The 

evaluation is done according to several criteria such as the 

robustness of segmentation and the easiness to segment the 

objects through the sequence. 

Keywords: Morphological segmentation, Image 

sequences, Marker propagation, Motion estimation, 

Watershed from markers, Interactive segmentation 

Electrical Energy 

Artificial neural networks for load flow and 

external equivalents studies 

Heloisa H. Müller, Marcos Julio Rider Flores, Carlos Alberto 

de Castro Jr. 

Electric Power Systems Research (Print) 

ISSN: 0378-7796 v:80 n:9 Sep-2010 pp:1033-1041 

doi: 10.1016/j.epsr.2010.01.008 

Abstract: In this paper an artificial neural network (ANN) 

based methodology is proposed for (a) solving the basic load 

flow, (b) solving the load flow considering the reactive power 

limits of generation (PV) buses, (c) determining a good quality 

load flow starting point for ill-conditioned systems, and (d) 

computing static external equivalent circuits. An analysis of the 

input data required as well as the ANN architecture is 

presented. A multilayer perceptron trained with the Levenberg– 

Marquardt second order method is used. The proposed 

methodology was tested with the IEEE 30- and 57-bus, and an 

ill-conditioned 11-bus system. Normal operating conditions 

(base case) and several contingency situations including 

different load and generation scenarios have been considered. 

Simulation results show the excellent performance of the ANN 

for solving problems (a)–d). 

Keywords: Artificial neural networks, Load flow, 

Reactive power limits of generation buses, Load flow 

with step size optimization, Static external equivalents 

Implementation and Performance Evaluation of a 

Reclosing Method for Shunt Reactor 

Comensated Transmission Lines 

Patricia Mestas, Maria Cristina Tavares, Aniruddha M. Gole 

IEEE Transactions on Power Delivery 

ISSN: 0885-8977 

Dec-2010 pp:1-6 

doi: 10.1109/TPWRD.2010.2084111 

Abstract: This paper proposes a new control method to reduce 

overvoltages due to three-phase reclosing for shunt 

compensated transmission lines (TL). The method detects the 

first minimum voltage region of the beating across the circuit 

breakers after protection dead time and works independently of 

voltage zero crossing, reducing significantly the reclosure time. 

The controller was tested on a Real Time Digital Simulator 

(RTDS) and its performance was compared to the traditional 

preinsertion resistor approach and another existing control 

method. 

Keywords: Controlled switching, electromagnetic 

transients, switching overvoltages, three-phase reclosing, 

transmission lines. 

Influence of Accurate Soil Representation for 

Transmission-Line Parameters: Analyses Based 

on Carson’s Modified Formulations 

João Bosco Gertrudes, Maria Cristina Dias Tavares, Carlos 

Manuel Portela 

Revista IEEE América Latina 

ISSN: 1548-0992 v:7 n:2 Nov-2010 pp:1-8 

Abstract: In this paper the influence of earth’s conductivity 

and permittivity frequency dependence are evaluated when 

calculating transversal and longitudinal transmission lines’ 

parameters directly from numerical integration of Carson’s 

modified expressions. As an example of the importance of 

properly considering the frequency-dependent soil model, an 

actual 440 kV single three-phase transmission-line was 

represented, comparing the longitudinal and transversal 

parameters considering the earth’s conductivity and permittivity 

frequency dependence soil model in relation to the common 

soil representation with a constant conductivity and permittivity 

that can be neglected assuming a low frequency approximation. 

Keywords: Soil model, Line parameters, Frequency 

dependence, Electromagnetic transients. 

Um Controlador de corrente de carga para o 

conversor em matriz trifásico-trifásico e para 

inversor de frequência sem capacitor do elo de 

corrente contínua 

Milton Evangelista de Oliveira Filho, Alfeu Joãozinho Sguarezi 

Filho, Jonas Rafael Gazoli, Ernesto Ruppert Filho 

SBA - Controle & Automação 

ISSN: 0103-1759 v:21 n:5 Set-2010 pp:534-545 

doi: 10.1590/S0103-17592010000500007 

Abstract: A Controller for the Three-Phase to Three-Phase 

Matrix Converter and for the Voltage Source Three-Phase 

Inverter Without DC-Link Capacitor 

Voltage source three-phase inverter plays an important role in 

modern industry. The conventional voltage source inverter has 

a large electrolytic capacitor as energy store element in order to 

keep the DC-link voltage constant. However, a large 

electrolytic capacitor increases the input current distortion. 

Replacing the large electrolytic capacitor by a small film 

capacitor, the input current quality is improved but the DC-link 

voltage and the output currents are distorted by low order 

harmonic components. 

The three phase to three phase matrix converter performs 

electric energy direct transfer from the input to the output with 

sinusoidal input current although the distortion and the 

unbalance of the input voltages affects directly the output of the 

matrix converter. 

This paper proposes a load current control method to the matrix 

converter and also to the voltage source inverter in absence of 

the dc-link capacitor in order to compensate the distortion 

caused by low order harmonics components in the output 

currents. The proposed load current control scheme employs 

just one PI controller and since that the space vector modulation 

is used in this control, the switching frequency of the converter 

is kept constant. Theorical foundation, simulations results and 

experimental results are presented. 

Keywords: matrix converter, voltage source inverter, 

modulation index, current control, bidirectional switch, 

space vector, input filter. 

Telecommunication and Telematic 

Blind turbo receivers with fast least-squares 

channel estimation and soft-feedback 

equalisation 

Murilo Bellezoni Loiola, Renato da Rocha Lopes, João Marcos 

Travassos Romano 

Electronics Letters 

ISSN: 0013-5194 v:46 n:21 Oct-2010 pp:1464 - 1465 

doi: 10.1049/el.2010.1819 


Abstract: Low-complexity blind turbo receivers composed of 

a soft-feedback equaliser (SFE) and fast least-squares (FLS) 

channel estimators are proposed. To reduce the complexity of 

the SFE computation, a function approximation is proposed 

instead of numerical algorithms in a specific step of the 

equaliser's computation. Concerning FLS channel estimators, a 

specific filter parameters initialisation procedure is proposed in 

each turbo iteration to avoid possible numerical instabilities. 

Estimation of noise variance is also considered. The proposed 

scheme can perform as the turbo equaliser with perfect channel 

knowledge from a certain signal-to-noise ratio. 

Keywords: fast least-squares channel estimation, 

function approximation, low-complexity blind turbo 

receivers, noise variance estimation, numerical 

algorithms, signal-to-noise ratio, soft-feedback 

equalisation, turbo iteration 

Construction of new families of nonbinary CSS 

codes 

Giuliano Gadioli La Guardia, Reginaldo Palazzo Junior 

Discrete Mathematics 

ISSN: 0012-365X v:310 n:21 Nov-2010 pp:2935-2945 

doi: 10.1016/j.disc.2010.06.043 

Abstract: New families of good q-ary (q is an odd prime 

power) Calderbank–Shor–Steane (CSS) quantum codes derived 

from two distinct classical Bose–Chaudhuri–Hocquenghem 

(BCH) codes, not necessarily self-orthogonal, are constructed. 

These families consist of CSS codes whose parameters are 

better than the ones available in the literature and comparable to 

the parameters of quantum BCH codes generated by applying 

the q-ary Steane’s enlargement of CSS codes. 

Keywords: Cyclotomic cosets, Bose–Chaudhuri– 

Hocquenghem (BCH) codes, Calderbank–Shor–Steane 

(CSS) codes 

Diffraction-Attenuation Resistant Beams: their 

Higher Order VErsions and Finite-Aperture 

Generations 

Michel Zamboni Rached, Leonardo André Ambrósio, Hugo 

Enrique Hernandez Figueroa 

Applied Optics 

ISSN: 1540-8973 v:49 n:30 Oct-2010 pp:5861-5869 

doi: 10.1364/AO.49.005861 

Abstract: Recently, a method for obtaining diffraction– 

attenuation resistant beams in absorbing media has been 

developed in terms of suitable superposition of ideal zero-order 

Bessel beams. In this work, we show that such beams keep their 

resistance to diffraction and absorption even when generated by 

finite apertures. Moreover, we shall extend the original method 

to allow a higher control over the transverse intensity profile of 

the beams. Although the method is developed for scalar fields, 

it can be applied to paraxial vector wave fields, as well. These 

new beams have many potential applications, such as in freespace 

optics, medical apparatus, remote sensing, and optical 

tweezers. 

Keywords: Laser beam shaping, Diffraction theory, 

Waves 

Efficient Calculation of Higher-Order Optical 

Waveguide Dispersion 

José Amilton Mores Junior, Gilliard Nardel Malheiros Silveira, 

Hugo Luis Fragnito, Hugo Enrique Hernandez Figueroa 


ISSN: 1094-4087 v:18 n:19 Sep-2010 pp:19522-19531 

doi: 10.1364/OE.18.019522 

Abstract: An efficient numerical strategy to compute the 

higher-order dispersion parameters of optical waveguides is 

presented. For the first time to our knowledge, a systematic 

study of the errors involved in the higher-order dispersions’ 

numerical calculation process is made, showing that the present 

strategy can accurately model those parameters. Such strategy 

combines a full-vectorial finite element modal solver and a 

proper finite difference differentiation algorithm. Its 

performance has been carefully assessed through the analysis of 

several key geometries. In addition, the optimization of those 

higher-order dispersion parameters can also be carried out by 

coupling to the present scheme a genetic algorithm, as shown 

here through the design of a photonic crystal fiber suitable for 

parametric amplification applications. 

Keywords: Numerical approximation and analysis, 

Parametric oscillators and amplifiers, Waveguides, 

Dispersion, Photonic crystal fibers 

Gradient Forces on Double-Negative Particles in 

Optical Tweezers using Bessel Beams in the Ray 

Optics Regime 

Hugo Enrique Hernandez Figueroa, Leonardo André Ambrósio 


ISSN: 1094-4087 v:18 n:23 Nov-2010 pp:24287-24292 

doi: 10.1364/OE.18.024287 

Abstract: Gradient forces on double negative (DNG) spherical 

dielectric particles are theoretically evaluated for v-th Bessel 

beams supposing geometrical optics approximations based on 

momentum transfer. For the first time in the literature, 

comparisons between these forces for double positive (DPS) 

and DNG particles are reported. We conclude that, contrary to 

the conventional case of positive refractive index, the gradient 

forces acting on a DNG particle may not reverse sign when the 

relative refractive index n goes from |n| > 1 to |n| < 1, thus 

revealing new and interesting trapping properties. 

Keywords: Geometric optics, Left-handed materials, 

Metamaterials, Optical tweezers or optical manipulation 

Luminescence of PbS quantum dots spread on 

the core surface of a silica microstructured 

optical fiber 

E. F. Chilcce, Roddy Elky Ramos Gonzales, C. M. B. Cordeiro, 

Luis Enrique Gutierrez Rivera, Hugo Luis Fragnito, Carlos 

Henrique de Brito Cruz, Aldario Chrestani Bordonalli, Hugo 

Enrique Hernandez Figueroa, R.L. Braga, Luiz Carlos Barbosa 

Journal of Non-Crystalline Solids 

ISSN: 0022-3093 v:356 n:44 Oct-2010 pages:2397–2401 

doi: 10.1016/j.jnoncrysol.2010.03.025 

Abstract: The broadband luminescence spectra, in the region 

from around 1000 to 1650 nm, of lead sulphide (PbS) quantum 

dots (QDs) spread onto the dual core surfaces of silica 

microstructured optical fibers (MOFs) (core diameters of not, 

vert, similar 2.5 and not, vert, similar 5.0 µm) are reported. For 

this purpose, colloidal solutions of PbS QDs of different sizes 

with luminescence bands around 877 (PbS877), 1160 

(PbS1160), and 1474 nm (PbS1474) were injected and then 

spread onto the dual core surfaces of silica MOFs using a 

nitrogen gas pressure system. The PbS QDs were excited (via 

evanescent field effect) by the light of a continuum wave 

semiconductor laser or a Ti:sapphire laser (at 785 nm) guided 

through the MOF cores. As an important result, blue-shift and 

the band broadening behaviors in the luminescence spectra of 

these PbS QDs were observed. 

Keywords: Microstructured optical fiber, Luminescence, 

Lead sulphide, Quantum dots, Evanescent field effect 

Modeling Interference in Wireless Ad Hoc 

Networks 

Paulo Cardieri 

IEEE Communications Surveys and Tutorials 

ISSN: 1553-877X v:12 n:4 Nov-2010 pp:551 - 572 

doi: 10.1109/SURV.2010.032700096 

Abstract: The recent increasing interest in ad hoc networks 

has motivated the study and development of interference 

models capable of capturing the intrinsic characteristics of this 

kind of network, such as the lack of a central coordination and 

the consequent distributed nature of some of the network 


functions (e.g., medium access control and routing protocols). 

As a consequence, a myriad of interference models for ad hoc 

networks can be found in the literature, that describes the 

effects of interference at different layers and with different 

levels of detail. Some of these models describe interference as a 

random process whose statistics depend mainly on physical 

layer parameters, and are better suited for the analysis of issues 

related to the physical layer. Other models focus on the effects 

of interference at higher layers, and are more appropriate when 

the analysis of network-related issues is of interest. This paper 

presents a comprehensive survey of interference models for 

wireless ad hoc networks, emphasizing their domains of 

application, illustrated with examples. The interference models 

are presented in this survey from the perspective of the radio 

capture phenomenon, resulting in a unified view of interference 

models, which may be helpful when selecting the appropriate 

model for a given purpose. 

Keywords: α-stable distribution-stable distribution, 

interference graphs, interference models, spatial point 

process, wireless ad hoc networks, wireless network 

models 

New Classes Of Topological Quantum Codes 

Associated With Self-Dual, Quasi Self-Dual And 

Denser Tessellations 

C. D. Albuquerque, Reginaldo Palazzo Jr., E. B. Silva 

Quantum Information & Computation 

ISSN: 1533-7146 v:10 n:11 Nov-2010 pp:956-970 

Abstract: In this paper we present six classes of topological 

quantum codes (TQC) on compact surfaces with genus g ≥ 2. 

These codes are derived from self-dual, quasi self-dual and 

denser tessellations associated with embeddings of self-dual 

complete graphs and complete bipartite graphs on the 

corresponding compact surfaces. The majority of the new 

classes has the self-dual tessellations as their algebraic and 

geometric supporting mathematical structures. Every code 

achieves minimum distance 3 and its encoding rate is such that 

k/n → 1 as n → ∞, except for the one case where k/n → 1/3 as 

n → ∞. 

Keywords: Topological quantum codes, Quantum errorcorrecting 

codes, Surface codes, Tessellations. 

Power Correlation Coefficient of a Very General 

Fading Model in Maximal Ratio Combining 

José Ricardo Mendes, Michel Daoud Yacoub, Ugo Silva Dias 

IEEE Transactions on Communications 

ISSN: 0090-6778 v:58 n:9 Sep-2010 pp:2472-2479 

doi: 10.1109/TCOMM.2010.09.090257 

Abstract: A very general fading scenario is considered for 

which exact, closed-form formulas for the correlation 

coefficient of the instantaneous power at the output of a 

Maximal Ratio Combining receiver is derived. The model 

includes the main fading environments as very particular cases. 

It is valid for both identically and non-identically distributed 

multipath clusters, and for both stationary and nonstationary 

environments. Most interestingly, the model allows for an 

uncountable number of combinations of novel fading scenarios. 

A further generalization is achieved with the angle as well as 

the time of arrival of the waves permitted to vary throughout 

the multipath clusters, as opposed to known models for which 

these parameters are fixed. Several particular examples 

illustrate the applicability of the general formulations. 

Keywords: η-μ distribution, κ-μ distribution, Correlation 

coefficient, Hoyt distribution, Nakagami-m distribution, 

Rayleigh distribution, Rice distribution, fading model, 

maximal ratio combining 

Richards growth model and viability indicators 

for populations subject to interventions 

Selene Loibel, Marinho G. Andrade, João Bosco Ribeiro do 

Val, Alfredo R. de Freitas 

Anais da Academia Brasileira de Ciências (Annals of the 

Brazilian Academy of Sciences) 

ISSN: 0001-3765 v:82 n:4 Dec-2010 pp:1107-1126 

doi: 10.1590/S0001-37652010000400028 

Abstract: In this work we study the problem of modeling 

identification of a population employing a discrete dynamic 

model based on the Richards growth model. The population is 

subjected to interventions due to consumption, such as hunting 

or farming animals. The model identification allows us to 

estimate the probability or the average time for a population 

number to reach a certain level. The parameter inference for 

these models are obtained with the use of the likelihood profile 

technique as developed in this paper. The identification method 

here developed can be applied to evaluate the productivity of 

animal husbandry or to evaluate the risk of extinction of 

autochthon populations. It is applied to data of the Brazilian 

beef cattle herd population, and the the population number to 

reach a certain goal level is investigated. 

Keywords: Richards growth model, population risk, 

harvested populations, parametric estimate, likelihood 

profile function. 

Article in proceedings 

Automation 

A Consciousness-Based Control System for a 

Simulated Autonomous Vehicle 

Ricardo Capitanio Martins Da Silva, Ricardo Ribeiro Gudwin 

In: XVIII Congresso Brasileiro de Automática (CBA 2010)- 

Antonio Padilha Feltrin(Ed.) - ISBN: 978-85-61507-02-2 

SBA - Sociedade Brasileira de Automática – Bonito(MS) - 

Brasil Sep-2010 pp:1648-1655 

Abstract: This work describes the application of the Baars- 

Franklin Architecture (BFA), an artificial consciousness 

approach, to synthesize a control system for an autonomous 

vehicle. The BFA was reported in the literature as a successful 

control system to different kinds of agents: CMattie, IDA and 

CTS. In this paper, BFA is for the first time applied for 

controlling an autonomous vehicle. Firstly we introduce the 

theoretical foundations of this approach for the development of 

a conscious agent. Then we explain the architecture of our 

agent and at the end we discuss the results and first impressions 

of this approach. 

Keywords: artificial consciousness, intelligent systems, 

autonomous vehicle, multi-agent systems 

Análise de Estabilidade e Controle H∞ de 

Sistemas Lineares com Atraso 

Rubens H. Korogui, André R. Fioravanti, José C. Geromel 




Brasil Set-2010 pp:4038-4043 

Abstract: This paper aims at introducing a linear time 

invariant comparison system for stability analysis and ∞ control 

design of time-delay systems. A 2n-th order rational system, 

called comparison system, is defined and is associated to a 

time-delay system with n state variables in such a way that 

stability analysis and H∞ control design of the comparison 

system are strongly related to those of the time-delay system. In 

this paper, the state feedback control design is used to show the 

potentialities of the proposed methodology. 

Keywords: Time-delay systems, H∞ control design, 

linear systems, numerical methods 

Avaliação de modelos de ativos financeiros com 

vistas a otimização de carteiras multi-período 

João Bosco Ribeiro do Val, André Schonardie Pasqual 





Brasil Set-2010 pp:818-823 

Abstract: This article presents a study of identification of 

stochastic models from historical time series of assets traded in 

the Brazilian stock exchange (Ibovespa). A procedure to 

investigate the fitting of some models and the validation of 

them is presented. It seeks the extraction of well adjusted 

models from the time series, with a view to provide a 

methodology for application in control and multi-period 

optimization. The main contribution is the creation of a more 

realistic scenario for the problem of multi-period optimization 

and control of economics and financial systems. The 

methodology here will be applied into a numeric problem 

containing real dada of the stock exchange, and the results will 

be presented and discussed. 

Keywords: Stochastic models, System identification, 

time series. 

Cálculo do Espectro de Lyapunov via Dinâmicas 

Clonadas e sua Aplicação no Circuito de Chua 

Filipe Ieda Fazanaro, Diogo Coutinho Soriano, Marconi Kolm 

Madrid, Ricardo Suyama, Romis Ribeiro De Faissol Attux, Jose 

Raimundo De Oliveira 




Brasil Sep-2010 pp:2511-2518 

Abstract: This work presents a methodology to evaluate the 

Lyapunov spectrum based on local divergence of nearby orbits 

in the phase space. The local divergence rate is evaluated by the 

difference of final states achieved by the original solution of the 

system and copies (clones) disturbed from an infinitesimal of 

the original system. This algorithm presents the advantage of 

calculating the local Lyapunov exponents by using only the 

state equations, that is, it does not require the linearization of 

the dynamics, being suitable for applications in non-smooth 

systems. Thus, this work presents several numerical 

experiments for validating the proposed method both for 

continuous- and discrete-time dynamical systems, and 

illustrates its application to the Chua oscillator, which is a 

classical paradigm in the study of chaotic systems. 

Keywords: Chaos, Lyapunov exponents, Non-smooth 

systems, Chua’s Circuit 

Cognição, Sistemas Complexos e Linguagem: A 

Interpretação Objetiva do Ambiente como 

Requisito para Aquisição de Linguagem 

Gramatical em Sistemas Artificiais 


In: XL Reunião Anual da Sociedade Brasileira de Psicologia - 

ISBN: 21765243 

Curitiba, Paraná Out-2010 pp:1-6 

Abstract: Existem vários experimentos referentes ao 

desenvolvimento das relações simbólicas e sobre autoorganização 

e emergência de vocabulários comuns e da 

linguagem simples (real ou virtual). No entanto, várias questões 

ainda estão em aberto, especialmente no tocante a processos 

complexos, a condições necessárias e/ou suficientes para o 

surgimento de relações semióticas e a pressupostos 

experimentais e suas conexões com evidências teóricas e 

empíricas. A emergência de linguagem pode ser vista como o 

ápice de uma sequência de processos que começam com signos 

mais elementares, como os ícones e os índices, e por meio de 

uma sequência sucessiva de signos mais complexos chega à 

emergência do símbolo. Diversos estudos na literatura tentam 

recriar sinteticamente esses processos para emergência de 

linguagem, muitas vezes fazendo oque se chama do 

"grounding" dos símbolos em sinais oriundos de sensores e 

atuadores, em criaturas artificiais. As criaturas artificiais, 

aprendendo e usando esses sinais, comportam-se coletivamente 

como um sistema complexo adaptativo, onde a auto- 

organização das interações comunicativas desempenham um 

papel importante no surgimento de uma comunicação baseada 

em símbolos. Neste trabalho, pretendemos analisar a hipótese 

teórica de que, para promover a associação entre sinais de 

sensores e atuadores a um repertório de símbolos, é necessário 

entretanto, a criação de uma etapa intermediária, onde esses 

sinais sensório-motores precisam ser traduzidos no que 

poderíamos chamar de uma interpretação objetiva do ambiente 

ou, em outras palavras, uma segmentação e modelagem do 

ambiente em termos de objetos e ações envolvendo objetos. 

Essa etapa de tradução seria responsável por traduzir sinais de 

uma ontologia sensório-motora para uma ontologia objetiva. 

Posteriormente, uma outra tradução seria necessária para 

traduzir os sinais dessa ontologia objetiva para uma ontologia 

simbólica. Mais do que isso, para que a comunicação simbólica 

possa emergir em sua plenitude, como na linguagem natural 

humana, nossa hipótese é a de que as criaturas envolvidas 

deveriam ter um processo de segmentação da realidade senão 

idêntico, pelo menos similar, dentro de uma variância 

controlada. Uma das limitações que as abordagens sintéticas de 

emergência de linguagem atuais possuem é sua incapacidade de 

ir além da emergência de significado para palavras isoladas. 

Estudos sobre a emergência de "linguagem gramatical", com 

frases completas são raros e inconclusivos. Nossa hipótese é a 

de que a emergência da linguagem gramatical só será possível 

após uma interpretação objetiva da realidade pelas criaturas 

artificiais. Essa interpretação objetiva serviria como um ícone 

intermediário da realidade, a ser posteriormente desenvolvido 

para a emergência de símbolos dicentes (frases completas) e 

argumentos (raciocínios). Nosso intuito é desenvolver essa 

hipótese teórica, de forma a criar protocolos e experimentos 

com criaturas artificiais onde o objetivo seria a emergência de 

linguagem gramatical. 

Computação Biogeográfica: Formalização e 

Proposição de uma Meta-Heurística Espaço- 

Temporal 

Rodrigo Pasti, Leandro Nunes De Castro Silva, Fernando Jose 

Von Zuben 




Brasil Sep-2010 pp:5065-5072 

Abstract: This work presents the conceptual framework of a 

spatial-temporal metaheuristic based on the principles and 

theories of biogeography. This is an initiative of formalizing 

what has been termed biogeographic computing, aiming at the 

proposition of a new paradigm of optimization and search 

algorithms, in which time and space have a core role in the 

conduction of the involved processes. With the computational 

implementation of concepts such as speciation, gene flow and 

habitat, a proposal of population-based metaheuristic is 

achieved, characterized by the promotion of processes which 

are generally absent, when considered together, or which play a 

subordinate role in alternative population meta-heuristics: (i) 

automatic control of the population size; (ii) automatic control 

of the number of species in the population; (iii) diversity 

maintenance in the population; and (iv) multimodal search 

capability. To illustrate the potential of biogeographic 

computing, a meta-heuristic is implemented taking a subset of 

the properly formalized biogeographic processes. Graphic 

results in the context of multimodal optimization in continuous 

spaces are presented and discussed. 

Keywords: biogeography, population metaheuristics, 

multimodal optimization in continuous spaces. 

Contribuição Sobre a Gênese, o Presente e o 

Futuro da Engenharia Elétrica 

Gilmar Barreto, Paulo David Battaglin 

In: COBENGE 2010 

Fortaleza-CE-Brasil Set-2010 pp:1-3 


Abstract: Este trabalho mostra a evolução do conhecimento 

sobre a Engenharia Elétrica. As contribuições deste trabalho 

procuram evidenciar os principais fatos que revelam os 

benefícios desta evolução para a sociedade humana, através da 

utilização da Eletricidade e do seu ensino. A Eletricidade está 

em estado latente na natureza e seu potencial tem sido 

descoberto e desenvolvido pelos seres humanos através dos 

milênios. A sua utilização nos primórdios pelas civilizações 

antigas, o desenvolvimento do conhecimento sobre ela e suas 

aplicações elementares, bem como a descoberta da inter-relação 

das várias formas de Eletricidade na natureza são exemplos 

disto, e são abordados neste trabalho. Os fundamentos da 

Engenharia Elétrica são a base do estado da arte e o seu ensino 

estruturado tem cooperado para a formação rigorosa de 

profissionais. 

Keywords: Engenharia Elétrica, Primórdios, 

Fundamentos, Ensino 

Contributions Concerning to Beginnings, 

Present And Future Of the Eletrical Engineering 

Gilmar Barreto, Paulo David Battaglin 

In: Proceedings of International Engineering Education 

Conference - ISBN: 978-975-6707-28-9 

Antalya, Turkey Nov-2010 pp:235-240 

Abstract: This project presents the knowledge evolution 

concerning the Electrical Engineering. The collaborations of 

this project have the task to disclosure key realities that point 

out benefits to human society, through the applications of 

Electricity and its teaching. Electricity has been latent in nature 

and human beings have discovered and developed its potential 

through millenniums. Electricity utilization by ancient 

civilizations in the beginnings, its basic knowledge 

development and applications, as well as the interconnection 

among Electricity’s shapes in nature are true examples of that, 

and is covered in this project. Electrical Engineering 

fundamentals have been some keystones to state of art. The 

Electrical Engineering well endowed teaching has cooperated 

for a build-up of high level graduated students. This project 

presents also some statements about UNICAMP/FEEC’s 

graduation course of Electrical Engineering, concerning the last 

40 years of its life. The statements bring us relevant 

information that allows some suggestions be presented in order 

to improve this Electrical Engineering course outreach. 

Keywords: Electrical Engineering, Beginnings, 

Fundamentals, Education. 

Controle genético não linear por realimentação 

de estado 

César Daltoé Berci, Celso Pascoli Bottura 




Brasil Set-2010 

Abstract: Control theory has been benefited from the 

enormous development of digital computing and computational 

intelligence to solve relatively complex problems through 

means of computational methods. In the control theory of 

nonlinear systems this relationship is even clearer. Because of 

the complexity of these systems, it becomes virtually 

impossible to treat most of them with traditional methods. 

Within this context, this paper proposes the design of a 

controller, based on genetic algorithms, which through a 

particular approach to the control problem, applies an 

evolutionary process to select the correct input to be applied to 

the system in each sample time. Thus, a controller quite simple 

and generally applicable to a wide range of nonlinear dynamic 

systems is obtained. 

Keywords: Intelligent Control, Nonlinear Systems, 

Genetic Algorithms 

Controle H∞ de Sistemas Lineares com 

Comutação 

Grace S. Deaecto, José C. Geromel, Jamal Daafouz 





Abstract: This paper is devoted to dynamic output feedback 

H∞ control design of continuous-time switched linear systems. 

The main purpose is to jointly design a switching rule and a full 

order dynamic switched controller depending only on the 

measured output that render the associated closed-loop 

switched linear system globally asymptotically stable and 

impose a pre-specified upper bound to the L 2 gain from the 

exogenous input to the controlled output. The solution for the 

stated control design problem is based on sufficient conditions 

expressed in terms of Riccati-Metzler inequalities, that are 

highly non-convex and, consequently, very difficult to solve. 

However, they allow to derive simpler alternative conditions 

that can be handled by means of any LMI solver coupled to a 

line search. The key issue is the proposition of a necessary and 

sufficient condition for the existence of a solution of the 

Riccati-Metzler inequalities with a pre-specified structure. An 

example of practical importance illustrates the theoretical 

results. 

Keywords: Switched systems, output feedback, linear 

matrix inequalities. 

Controle ótimo aplicado a inversores PWM: 

validação experimental de acordo com a norma 

IEC62040-3 e certificação de desempenho 

usando LMIs 

Vinícius Foletto Montagner, Samuel Polato Ribas, Humberto 

Pinheiro, Ricardo Coracao de Leao F. de Oliveira 




Brasil Sep-2010 pp:3121-3127 

Abstract: This work presents the design and experimental 

validation of a discrete linear quadratic regulator suitable to 

control single phase PWM inverters with linear and nonlinear 

loads, with results complying with IEC62040-3 Standard for 

uninterruptible power supplies. The load is modelled here as a 

disturbance of current, allowing to describe any type of load 

and also to verify the closed-loop performance using standard 

system norms. The control action is a linear combination of the 

plant states and the states of an internal model principle based 

controller, allowing to track sinusoidal reference signals in the 

presence of load disturbances with harmonics. The controller is 

implemented using a fixed point digital signal processor which 

introduces constraints to the design as a delay in the application 

of the control signal and also limitations on precision and 

dynamic range of data representation. Differently from most 

works dealing with the same plant, the performance of the 

closed-loop system is certified here by means of convex 

optimization problems measuring the system capacity of 

rejection of diturbances. The experimental results obtained for a 

prototype of 0.5kVA with 120V RMS, 60Hz with linear and 

nonlinear loads prove that the output of the system complies 

with IEC62040-3 Standard. 

Keywords: PWM inverters, optimal control, digital 

control, linear matrix inequalities, convex optimization. 

Controle robusto descentralizado de sistemas 

não lineares com incertezas variantes no tempo 

limitadas em norma 

Marcus Pantoja da Silva, Celso Pascoli Bottura 




Brasil Set-2010 pp:486-491 


Abstract: Nonlinear systems with norm bounded time-varying 

uncertainties are investigated in this work. Conditions for 

robust stability in the form of linear matrix inequalities for 

designing robust control gain state feedback that the same time 

stabilizes the system and maximizes the limit of uncertainty of 

the non-linear term are established based on quadratic 

Lyapunov functions and an procedure here propoded. The 

conditions obtained are extended to a model of decentralized 

control. Numerical examples are presented and compared with 

results from the literature, highlighting the advantages of the 

proposed methodology. 

Keywords: Robust Control, Linear Matrix Inequalities, 

Decentralized Robust Control, Robust Stabilization 

Controle seletivo com critério H-2 de sistemas 

nebulosos Takagi-Sugeno 

Eduardo Stockler Tognetti, Pedro Luis Dias Peres, Ricardo 

Coracao De Leao F De Oliveira 




Brasil Sep-2010 pp:4118-4125 

Abstract: This paper presents new results concerning the 

design of state feedback controllers for continuoustime Takagi- 

Sugeno (T-S) fuzzy systems via fuzzy Lyapunov functions. A 

new modeling is proposed to represent the membership 

functions of T-S fuzzy systems, with the Cartesian product of 

simplexes, called multi-simplex. Linear matrix inequality 

relaxations based on homogeneous polynomials matrices are 

provided for controller design with an H2 guaranteed cost. The 

time-derivatives of the membership functions are modeled as 

belonging to a polytope, and the bounds of the variation rate are 

taken into account in the model. As one of the main 

contributions, the method allows to synthesize control gains 

depending only on some premise variables, selected by the 

designer. Numerical experiments illustrates the flexibility and 

advantages of the proposed method. 

Keywords: Takagi-Sugeno fuzzy systems, H2 control, 

Continuous-time systems, Linear matrix inequalities. 

Controle, sujeito a restrições, de sistemas 

lineares discretos com saltos markovianos e 

com ruídos multiplicativo e aditivo 

Walter Furloni, Jo˜ao Bosco Ribeiro do Val, Alessandro N. 

Vargas 




Brasil Set-2010 pp:2910-2917 

Abstract: The purpose of this article is to present a simple 

method to solve the problem of stochastic optimal constrained 

control of discrete-time Markov jumps linear systems (MJLS) 

with multiplicative and additive noises. Constraints appear on 

system state and input control variables in terms of their first 

two moments. A simple linear state feedback controller is 

considered independently of the Markov state information 

availability and it is determined by optimizing a quadratic 

performance index. The solution is based on a numeric method 

performing a variational search using LMI formulation. 

Additionally, it is showed that the proposed methodology may 

be applied to solve porfolio dynamic selection problems in 

financial area, adding another tool to solve the classic problem 

of mean × variance. 

Keywords: Markov jump systems, multiplicative noise, 

stochastic optimal constrained control, mean × variance 

control, linear matrix inequalities 

Decomposição de Dantzig-/wolfe para 

Problemas com Parâmetros Fuzzy 

Jussara Rodrigues Ciappina, Akebo Yamakami 

In: XXXIII Congresso Nacional de Matemática Aplicada e 

Computacional (CNMAC) 

Aguas de Lindoia, SP Set-2010 pp:1-6 

Abstract: Este trabalho apresenta uma proposta para resolver 

problemas com parâmetros fuzzy baseada no método clássico 

de decomposição de Dantzig-Wolfe. Métodos utilizando 

técnicas de decomposição tratam problemas que apresentam 

uma estrutura especial no conjunto das restrições. Um exemplo 

com tal estrutura é o problema de fluxo multiproduto fuzzy. O 

algoritmo proposto visa encontrar a solução ótima trabalhando 

com o problema na forma fuzzy, durante todo procedimento de 

resolução. 

Keywords: Fuzzy, Otimização, Decomposição, Fluxo 

Multiproduto Fuzzy 

Design and experimental validation of a robust 

H-2 controller applied to a boost converter 

Vinícius Foletto Montagner, Luiz Antonio Maccari Junior, 

Ricardo Coracao De Leao F De Oliveira 




Brasil Sep-2010 pp:1549-1554 

Abstract: This paper proposes the design and experimental 

validation of a robust H2 control technique for a boost 

converter. The design procedure adopts a linearized model of 

the converter affected by time-varying uncertain parameters 

with a polytopic structure. Using this model, an optimal H2 

state feedback controller (under quadratic stability) is 

synthesized through convex optimization based on linear matrix 

inequalities. The control gains ensure closed-loop stability and 

an H2 guaranteed cost for the entire set of uncertainties and 

also for arbitrary parametric variation inside this set. A boost 

converter of nominal power equal to 100W is used for the 

design of the controller. The input voltage, the operating point 

duty cycle and the load are considered as uncertain and 

arbitrarily time-varying parameters. The control gains obtained 

for this converter produce good simulation and experimental 

results. The quality of the results is measured by means of fast 

transient responses and small overshoots and undershoots on 

the output voltage. The experimental validation prove the 

viability of practical application of an H2 robust control 

technique for this plant. 

Keywords: Boost converter, robust control, optimal 

control, convex optimization, linear matrix inequalities. 

Evolving Arbitrarily Connected Feedforward 

Neural Networks via Genetic Algorithms 

Wilfredo Jaime Puma Villanueva, Fernando Jose Von Zuben 

In: 11st Brazilian Symposium on Neural Networks - SBRN - 

ISBN: 978-0-7695-4210 

São Bernardo do Campo-SP Oct-2010 pp:127-132 

Abstract: Though several approaches have already been 

proposed in the literature to evolve neural network topologies 

for solving a wide range of machine learning tasks, this paper 

presents an alternative one, capable of evolving arbitrarily 

connected feedforward neural networks (ACFNNs), including 

linear and nonlinear neurons. A genetic algorithm is conceived 

to adjust the topology and also to perform variable selection. 

The weights of the obtained neural networks, with arbitrary 

topologies, are adjusted using a simple descent gradient 

algorithm. The purpose is to obtain high-quality and 

parsimonious predictors for two real-world and one synthetic 

time series. The obtained results are compared with the ones 

produced by traditional MLP models and Mixtures of 

Heterogeneous Experts (MHEs). 

Keywords: Neural networks, arbitrary architectures, 

genetic algorithms 


Filtragem de Medidas Transmitidas por Rede 

Usando Sistemas com Saltos Markovianos a 

Tempo Discreto 

Alim Gonçalves, André R. Fioravanti, José Geromel 




Brasil Set-2010 pp:782 - 787 

Abstract: This paper addresses how several models available 

for a measurement transmission network channel, like the 

generalized Gilbert-Elliot, Fritchman or McCullough ones, 

from a linear and time invariant plant to its filter can be 

incorporated into the more general framework of Markov Jump 

Linear Systems filtering with partially known transition 

probabilities. Combined with transmission protocols that allow 

package failure recognition, the particular concept of cluster 

availability of the Markov modes becomes appealing. An 

example shows the applicability of the results. The design of 

the filter is done using Linear Matrix Inequalities. 

Keywords: Discrete-time Markov jump linear systems, 

Network filtering, Linear matrix inequalities. 

Filtragem robusta H2 e H∞ usando LMIs para 

sistemas incertos contínuos politópicos 

invariantes no tempo 

Márcio Júnior Lacerda, Pedro Luis Dias Peres, Ricardo 





Brasil Sep-2010 pp:4110-4117 

Abstract: This paper presents new linear matrix inequality 

conditions for H 2 and H∞ robust filter design for 

continuoustime polytopic systems with time-invariant 

uncertainty. Thanks to the use of a larger number of slack 

variables, the proposed conditions are less conservative than the 

existing conditions in the literature, containing recently 

published results as particular cases. Examples illustrate the 

better performance of the designed filters using the proposed 

approach when compared to other methods for robust filter 

design available in the literature. 

Keywords: Continuous-time uncertain systems, Robust 

H2 and H∞ filtering, Linear matrix inequalities 

Filtro de partículas aplicado ao rastreamento de 

alvos manobrantes utilizando a velocidade radial 

Victor Baptista Frencl, João Bosco Ribeiro do Val 




Brasil Set-2010 pp:1763-1770 

Abstract: The objective of this paper is to study the particle 

filter, together with the BLUE filter, applied to the problem of 

maneuvering tracking targets in space. Based on this study, we 

propose a method to obtain the angular velocity of the target in 

constant turn trajectories by using the radial velocity 

information from the observation vector. In the end, we will 

show some tests results to evaluate the performance of the 

proposed filter, comparing them with some tests results with 

IMM filter banks. 

Keywords: Target Tracking, Dynamic Models, 

Observation Models, Particle Filter, BLUE filter, Radial 

Velocity, Angular Velocity 

Full Rate and Full Diversity Codes for the 2x2 

Coherent Multiple-Input Multiple-Output (MIMO) 

Systems 

Edson Donizete de Carvalho, Antonio Aparecido de Andrade, 

Reginaldo Palazzo Jr., Jozué Vieira Filho 




Brasil Sep-2010 pp:2649- 2654 

Abstract: In this work we present a new class of space-time 

block codes based on arithmetic Fuchsian groups.This new 

class of codes satis_es the property full-diversity, linear 

dispersion and full-rate. 

Keywords: MIMO-systems, space-time code, diversity, 

division ring, arithmetic fuchsian groups 

Global Maximization of a Generalized Concave 

Multiplicative Problem in the Outcome Space 

Alireza Mohebi Ashtiani, Paulo Augusto Valente Ferreira 

In: XXXIII Congresso Nacional de Matemática Aplicada e 

Computacional (CNMAC) 

Aguas de Lindoia, SP Sep-2010 pp:1-6 

Abstract: In this work we proposed an outcome space 

approach for globally solving generalized concave 

multiplicative problems, a special class of nonconvex problems 

which involves the maximization of a finite sun of products of 

concave functions over a nonempty compact convex set. It is 

shown that this nonconvex maximization problem can be 

reformulated as an indefinite quadratic problem with infinitely 

many linear inequality constraints. A relaxation-constraint 

enumeration algorithm is used to solve such indefinite quadratic 

programming problem. A computational experience is reported. 

Keywords: Global optimization, multiplicative 

programming, convex analysis, indefinite quadratic 

programming, 

Max-plus Linear Observer: Application to 

Manufacturing Systems. 

Laurent Hardouin, Cristina A. Maia, Bertrand Cottenceau, 

Rafael Santos Mendes 

In: 10th International Workshop on Discrete Event Systems- 

WODES2010 

Berlin – Germany Sep-2010 pp:1-7 

Abstract: This paper deals with the observer design for maxplus 

linear systems. The approach is based on the residuation 

theory which is suitable to deal with linear mapping inversion 

in idempotent semiring. An illustrative example allows to 

discuss about a practical implementation. 

Keywords: Discrete Event Dynamics Systems, 

Idempotent Semirings, Max-Plus Algebra, Residuation 

Theory, Timed Event Graphs, Dioid, Observer, State 

Estimation. 

Modelo Adaptativo Nebuloso para Detecção e 

Diagnóstico de Falhas 

André Paim Lemos, Walmir Matos Caminhas, Fernando 

Antonio Campos Gomide 




Brasil Sep-2010 pp:3284-3291 

Abstract: This paper introduces a new online approach for 

fault detection and diagnosis. The approach is an evolving 

fuzzy classifier that incorporates new operational information 

using incremental unsupervised clustering algorithm. The 

efficiency of the approach is verified in fault detection and 

diagnosis of an induction machine. Experimental results show 

that the approach is competitive for fault diagnosis of dynamic 

systems especially when there is no complete information about 

failure modes. 

Keywords: Fault Detection and Diagnosis, Evolving 

Fuzzy Systems 

Modelos Baseados em Conjuntos Aproximados 

Carlos Alberto Murari Pinheiro, Fernando Antonio Campos 

Gomide, Otávio Augusto Salgado Carpinteiro, Isaías Lima 





Brasil Sep-2010 pp:3182-3188 

Abstract: This work suggests a new method to develop rulebased 

models using concepts about rough sets. The rules 

encapsu-late relations among variables and give a mechanism 

to link granular descriptions of the models with their 

computational proce-dures. An estimation procedure is 

suggested to compute values from granular representations 

encoded by rule sets. The method is useful to develop granular 

models of static and dynamic nonlinear systems and processes. 

Numerical examples illustrate the main features and the 

usefulness of the method. 

Keywords: Rule-based models, system modeling, 

function approximation, dynamic systems, non-linear 

model, rough sets. 

Modelos baseados em conjuntos aproximados 

Carlos Pinheiro, Fernando Gomide, Otávio Carpinteiro, Isaías 

Lima 




Brasil Set-2010 pp:3182-3188 

Abstract: This work suggests a new method to develop rulebased 

models using concepts about rough sets. The rules 

encapsu-late relations among variables and give a mechanism 

to link granular descriptions of the models with their 

computational proce-dures. An estimation procedure is 

suggested to compute values from granular representations 

encoded by rule sets. The method is useful to develop granular 

models of static and dynamic nonlinear systems and processes. 

Numerical examples illustrate the main features and the 

usefulness of the method. 

Keywords: Rule-based models, system modeling, 

function approximation, dynamic systems, non-linear 

model, rough sets 

Modelos Lineares GOBF com Funções Internas 

Jeremias Barbosa Machado, Ricardo José Gabrielli Barreto 

Campello, Wagner Caradori do Amaral 




Brasil Sep-2010 pp:505-512 

Abstract: This paper presents a approach to the representation 

of linear dynamic systems using generalized orthonormal basis 

functions. This technique includes a method to select the poles 

of the model by nonlinear optimization algorithms, which 

require to calculate the gradients of the orthonormal functions 

outputs with respect to their parameters. These gradients are 

calculated analytically and provide the exact direction of search 

in the optimization of those parameters. A simulated example 

illustrates the techniques of modeling and identification 

proposed. 

Keywords: Dynamic linear Systems, Orthonormal Basis 

Functions, Identification, Modeling 

Nova proposta de controle adaptativo para 

sistemas discretos no tempo utilizando 

estimação da saída da folga desconhecida 

Talía Simões dos Santos, Yuzo Iano 





Abstract: In this paper, we focus on the development of a new 

adaptive control scheme for systems with unknown backlash. 

More specifically, we propose a discrete-time adaptive backlash 

inverse based controller for plants that have a known linear part 

and an unknown backlash at its input. We also demonstrate that 

the harmful effects of backlash can be cancelled by adding two 

adaptive backlash inverse structures one being feedbacked by a 

linear gain and a filter that estimates the unknown backlash 

output, that is, it estimates the linear plant input. The backlash 

inversion blocks provide new adaptive laws for the updating of 

the backlash inverse parameters, using the estimated backlash 

output. We show by simulations that the filter accurately 

recovers the linear plant input and that our adaptive control 

approach improves the system performance, once the difference 

between the backlash output and the adaptive backlash inverse 

input, converges to a very small value. The simulations involve 

a third order system in order to highlight the efficiency of 

proposed adaptive control approach. 

Keywords: Backlash, Adaptive Control, Estimation, 

Filtering. 

Nova proposta de controle adaptativo para 

sistemas discretos no tempo utilizando 

estimação da saída da folga desconhecida 

Talía Simões dos Santos, Yuzo Iano 




Brasil Set-2010 pp:5261-5267 

Abstract: In this paper, we focus on the development of a new 

adaptive control scheme for systems with unknown backlash. 

More specifically, we propose a discrete-time adaptive backlash 

inverse based controller for plants that have a known linear part 

and an unknown backlash at its input. We also demonstrate that 

the harmful effects of backlash can be cancelled by adding two 

adaptive backlash inverse structures one being feedbacked by a 

linear gain and a filter that estimates the unknown backlash 

output, that is, it estimates the linear plant input. The backlash 

inversion blocks provide new adaptive laws for the updating of 

the backlash inverse parameters, using the estimated backlash 

output. We show by simulations that the filter accurately 

recovers the linear plant input and that our adaptive control 

approach improves the system performance, once the difference 

between the backlash output and the adaptive backlash inverse 

input, converges to a very small value. The simulations involve 

a third order system in order to highlight the efficiency of 

proposed adaptive control approach. 

Keywords: Backlash, Adaptive Control, Estimation, 

Filtering. 

Novas condições LMI para projeto de 

controladores estáticos mistos H2/H∞ por 

realimentação de saída para sistemas 

politópicos contínuos invariantes no tempo 

Cristiano Marcos Agulhari, Pedro Luis Dias Peres, Ricardo 






Abstract: This paper deals with the design of H 2-H∞ robust 

static output-feedback controllers for uncertain continuous-time 

linear systems, with time-invariant parameters lying in 

polytopic domains. The proposed technique is based on the 

resolution of LMI (Linear Matrix Inequality) conditions and 

consists of two stages: a parameter-dependent state-feedback 

gain is obtained at the first stage and used as an input to the 

second stage, which returns a robust output-feedback static gain 

associated to a mixed H 2-H∞ criterium. The conditions are 

based on parameter-dependent Lyapunov functions and, 

differently from most of existing methods, can deal with 

uncertainties in the output matrix. The validity and the 

efficiency of the method are illustrated by means of 

comparisons with other conditions from the literature. 


Keywords: Static output feedback, H2 norm, H∞ norm, 

Uncertain continuous-time linear systems, Linear matrix 

inequalities 

Planejamento Operacional e Controle de 

Alocação de Vagões em Tempo Real 

Joelma Cristina Costa, Rodrigo De Almeida Gonçalves, 

Fernando Antonio Campos Gomide 




Brasil Sep-2010 pp:1947-1953 

Abstract: Empty freight car assignment process involves a 

considerable amount of information and requires fast response 

to quickly inform assignment decisions to railroad yard control 

centers. Attachments and detachments activities along trains 

route must be planned and executed to avoid delays and 

operation disturbances. This paper suggests an algorithm to 

solve empty car assignment operational planning problems in 

real time. The purpose of the algorithm is to provide 

operational control centers with a coordination and control 

mechanism to manage empty car operations at rail yards. The 

car assignment algorithm considers the train schedule, train 

routes, train capacity, and railroad operational knowledge. 

Experimental results show that the algorithm provides realistic 

and e 

ective solutions for car allocation and management than 

alternative methods when considering the quality of the 

solution and computational performance. 

Keywords: Car Assignment Problem, Real Time 

Operations Planning 

Previsibilidade Local e Estruturas Lagrangianas 

Coerentes no Modelo de Fitzhugh-Nagumo. 

Diogo Coutinho Soriano, Ricardo Suyama, Romis Ribeiro De 

Faissol Attux 

In: XXII Congresso Brasileiro de Engenharia Biomédica 

(CBEB 2010) - ISBN: 2179-3220 

Sociedade Brasileira de Engenharia Biomédica - SBEB 

Tiradentes(MG) Brasil Nov-2010 pp:461-464 

Abstract: This work aims to study the local predictability in 

the classical FitzHugh-Nagumo neuronal model, which is 

quantifyed by means of the the finite-time Lyapunov exponents 

using a method specially developed here to deal with the nonsmooth 

excitation commonly applied to neuronal models. The 

technique allows to identify regions of critical predictability in 

the form of Lagrangian Coherent Structures as it is defined in 

fluid mechanics, and associte them to the phisiological states 

represented by the model. In particular, it is possible to locate 

the action potential threshold in the phase space and 

discriminate the physiological states where the model is able to 

provide reasonable predictions given an uncertainty in the 

initial state. 

Keywords: expoentes de Lyapunov de tempo finito, 

previsibilidade, modelo neuronal de FitzHugh-Nagumo, 

caos. 

Projeto convexo de controladores por 

realimentação de estados para sistemas 

discretos chaveados com saturação 

Taís Calliero Tognetti, Vinícius Foletto Montagner, Renato 

Alves Borges, Pedro Luis Dias Peres 




Brasil Set-2010 pp:4076 - 4082 

Abstract: O projeto de um controlador chaveado para 

sistemas chaveados discretos no tempo com saturação no 

atuador é investigado neste artigo. Um procedimento convexo 

em termos de desigualdades matriciais lineares baseado em 

uma função afim de Lyapunov é fornecido para projetar um 

controlador chaveado que garanta a estabilidade do sistema 

sujeito a uma função arbitrária de chaveamento. Restrições de 

alocação de pólos também são consideradas para satisfazer 

eventuais especificações no domínio do tempo, tais como 

tempo de subida, sobresinal máximo e tempo de acomodação. 

As condições propostas possuem variáveis extras e fornecem os 

ganhos do controle independentemente das matrizes de 

Lyapunov, o que possibilita a obtenção de resultados menos 

conservadores. A relação entre o tamanho da região de alocação 

de pólos e o tamanho da região de estabilidade local é 

investigada. Um exemplo numérico ilustra a eficiência das 

condições propostas. 

Keywords: Sistemas discretos chaveados, Saturação, 

Controle chaveado, Realimentação de estados, 

Desigualdades matriciais lineares. 

Redes Neurais Granulares para Aprendizagem 

Incremental Semi-Supervisionada 

Daniel Furtado Leite, Pyramo Pires Da Costa Júnior, 





Brasil Sep-2010 pp:2592-2599 

Abstract: This paper suggests an adaptive fuzzy neural 

network framework to classify data streams using a partially 

supervised learning algorithm. The framework consists of an 

evolving granular neural network which processes 

nonstationary data streams using a one-pass incremental 

algorithm. The granular neural network evolves fuzzy 

hyperboxes and uses a new nullnorm-based neuron model. 

Contrary to the usual parametric approaches, learning performs 

simultaneous structural and parametric adaptation whenever 

environment changes are re ected in input data. The approach 

does not require prior statistical knowledge about data and 

classes. Computational experiments show that the granular 

neural network is robust, processes unlabeled examples, and 

handles different types of concept drift efficiently. 

Keywords: Granular Computing, Evolving Systems, 

Incremental Learning, Concept Drift 

Regulador linear quadrático de sistemas lineares 

com saltos markovianos e controle nos 

chaveamentos 

Alessandro N. Vargas, João Y. Ishihara, João Bosco Ribeiro do 

Val 




Brasil Set-2010 pp:4701-4705 

Abstract: In this paper, we present a suboptimal linear 

quadratic regulator for Markov Jump Linear Systems with a 

class of control in jumps. The system presents a doubly 

switching structure in a manner that part of the system 

parameters jump according to a Markov chain and the other 

jump according to a given switching rule. This approach is 

useful, for instante, to model certain Networked Control 

Systems as illustrated in the paper. 

Keywords: linear quadratic problems, switching 

systems, Markov processes 

Robust H-2 filter design for polytopic linear 

systems via LMIs and polynomial matrices 

Márcio Júnior Lacerda, Ricardo Coração de Leão Fontoura de 

Oliveira, Pedro Luis Dias Peres 

In: 49th IEEE Conference on Decision and Control - CDC2010 

Atlanta, Georgia, USA Dec-2010 pp:1466-1471 

Abstract: This paper presents new linear matrix inequality 

conditions for full order robust H-2 filter design for continuous 

and discrete-time polytopic linear systems with time-invariant 

uncertainty. Thanks to the use of a larger number of slack 


variables, the proposed conditions are less conservative than the 

existing conditions in the literature, containing recently 

published results as particular cases. Examples illustrate the 

better performance of the proposed filters when compared to 

other approaches for robust filter design. 

Keywords: Uncertain systems, Robust H-2 filtering, 

Homogeneous polynomial Lyapunov functions, LMI 

relaxations 

Síntese de filtro H-2 robusto como um problema 

de realimentação estática de saída 

Renato A. Borges, Taís Calliero Tognetti, Ricardo Coração de 

Leão Fontoura de Oliveira, Pedro Luis Dias Peres 





Abstract: Neste artigo, o problema de projeto de filtros H2 

para sistemas discretos e invariantes no tempo é investigado. O 

problema de filtragem é reescrito como um problema de 

realimentação estática de saída e o lema da eliminação utilizado 

para a obtenção das condições de síntese. Ambos os casos 

precisamente conhecido e incerto são considerados. As 

condições de síntese obtidas por meio de funções de Lyapunov 

são expressas como desigualdades matriciais lineares. Um filtro 

robusto de ordem arbitrária é obtido solucionando um problema 

de otimização que minimiza um limitante superior para o 

desempenho H2 do erro de estimação. Um exemplo numérico é 

apresentado. 

Keywords: Filtragem de ordem reduzida, Desempenho 

H2, Funções de Lyapunov, Desigualdades matriciais 

lineares. 

Stability Analysis and Control Design for LPV 

Systems using Homogeneous Polynomial Path 

Dependent Lyapunov Functions 

Luis Antonio Rodrigues, Juan Francisco Camino dos Santos, 

Pedro Luis Dias Peres 




Brasil Sep-2010 pp:4714-4720 

Abstract: This paper presents LMI conditions for stability 

analysis and synthesis of robust and gainscheduled state 

feedback controllers for discrete-time linear parameter-varying 

(LPV) systems. It is assumed that the system matrices have a 

homogeneous polynomial dependence of arbitrary degree on 

the time-varying parameters. The parameters are assumed to 

vary inside a polytope and have known bounds on their rate of 

variation. The geometric properties of the polytopic domain are 

exploited to derive a finite set of linear matrix inequalities 

(LMIs) that take into account the bounds on the rates of 

variation of the scheduling parameters. The LMI conditions are 

obtained using a quadratic in the state Lyapunov function with 

a homogeneous polynomial dependence on the scheduling 

parameters at successive instants of time. Numerical results 

show the benefits of the proposed approach. 

Keywords: Time-varying systems, discrete-time systems, 

stability analysis, control design, Lyapunov function, 

LMI conditions. 

Static output feedback control of polytopic 

systems using polynomial Lyapunov functions 

Cristiano Marcos Agulhari, Ricardo Coração de Leão 

Fontoura de Oliveira, Pedro Luis Dias Peres 


Atlanta, Georgia, USA Dec-2010 pp:6894-6901 

Abstract: This paper is concerned with the problem of robust 

static output feedback control design for continuous-time 

uncertain linear systems. The uncertain time-invariant 

parameters belong to a polytopic domain and affect all system 

matrices. A two-stage linear matrix inequality procedure is 

proposed. At the first step, a stabilizing state feedback 

scheduled gain with polynomial or rational dependence on the 

parameters is determined. This state feedback gain is used as an 

input parameter for the second stage, which synthesizes the 

robust static output feedback gain. In both stages, a 

homogeneous polynomially parameter-dependent Lyapunov 

function of arbitrary degree is used to assess closed-loop 

stability. Numerical examples demonstrate that with the 

increase of the degree of the polynomial matrices more accurate 

results are obtained, outperforming the existing methods in the 

literature. 

Keywords: Static output feedback, uncertain linear 

systems, Homogeneous polynomial Lyapunov functions, 

LMI relaxations 

Uma análise empírica da acumulação de 

reservas internacionais em períodos de crise 

Ana Cláudia V. S. Bulcão, José Leite Silva Jr., Takaaki Ohishi 




Brasil Set-2010 pp:4881-4888 

Abstract: For the International Monetary Fund, international 

reserves are the assets managed by the monetary authority of a 

country that are readily available to fund any deficits in balance 

of payments. Reserves are also important to show strength in 

the conduct of monetary and exchange policies of a country. 

However, the importance of international reserves does not 

seem to be unanimous theme among economists. Some critics 

argue there is a high cost in the maintenance of such reserves, 

and investment alternatives would be more attractive. Other 

economists say the cost of maintaining reserves is negligible 

compared to costs of financial crises related to capital flight, or 

the loss of value of national currency. However, usually both 

sides are unable to provide empirical evidence of their 

arguments. The aim of this work is to study if the accumulation 

of international reserves was related to the resumption of 

economic development after the occurence of a crisis. Thus, it 

offers empirical evidence as a contribution to the debate about 

the usefulness of reserves. 

Keywords: International Reserves, Crisis, Selforganizing 

Map 

Uma proposta imuno-inspirada para a solucção 

algébrica da equação de Riccati no problema de 

identificação de séries temporais no espaço de 

estado 

Mateus Giesbrecht, Celso Pascoli Bottura 





Abstract: In this paper an immuno-inpired approach to _nd 

the solution of algebraic Riccati equation is proposed. The 

motivation to develop this new method is that a Riccati 

equation arises from the state space time series modeling 

problem and the solution of this equation must be a covariance 

matrix. Since constant parameters of the Riccati equation are 

calculated from experimental data, the solution found with the 

known methods is not a covariance matrix. By transforming the 

Riccati equation on a constrained optimization problem, and 

solving it with the immuno-inspired algorithm, a matrix 

structured as a covariance matrix is found. With this solution, 

the time series given from the model reects the original one. 

Keywords: State space time series identification, 

Immuno-inspired algorithms, Artificial intelligence, 

Riccati Equation 



Blue light and supercontinuum generation using 

small-core silica photonic crystal fibers 

Enver Fernandez Chillcce, C. M. B. Cordeiro, Roddy Elky 

Ramos Gonzales, Hugo Luis Fragnito, Carlos Henrique de 

Brito Cruz, Hugo Enrique Hernandez Figueroa, L.C. Barbosa 

In: Latin America Optics and Photonics Conference (LAOP) 

Recife - PE Sep-2010 pp:1 - 6 

Abstract: The fabrication of small-core photonic crystal fibers 

and preliminary supercontinuum generation characterization are 

reported. In such non-linear experiments fs pulses from a Ti: 

Sapphire laser were coupled in the fiber core and the generated 

spectra recorded. 

AC – Clocked Power Supply DCVSL – Differential 

Cascode Voltage Switching Logic: CMOS Layout 

Design Guidelines to Optimize Energy 

Dissipation 

Humberto Xavier de Araujo, Luiz Carlos Kretly 

In: 26 2010 IEEE 26-th Convention of Electrical and 

Electronics Engineers 

Eilat- Israel Nov-2010 pp:1 - 6 

Abstract: The AC power supply clocked circuits is a class of 

digital gates which uses clock signals replacing the VDD and 

ground terminals in the static gates. In this paper the guideline 

for an AC-clocked logic gate is described. One crucial problem 

related to digital circuits design is the zero-order calculation or 

first guess on the device dimensions. The DCVSL-Differential 

Cascode Voltage Switching Logic in CMOS technology is a 

critical circuit if the designer has restricted specification such as 

maximum operational frequency, load or fan-out. This paper 

shows a detailed design methodology for DCVSL which is also 

useful for other circuit and configurations. The XNOR gates 

with three inputs were designed under frequency and load 

restrictions. A few design rules were established allowing the 

designer a great knowledge in the circuit operation and 

performance optimization. As a result, the design rules were 

validated by simulation tools such as ADS-Advanced Design 

System, and the complete layout generated on 0.35 μm CMOS 

technology for further integration. A Full Adder circuit layout 

was also implemented on CMOS technology. The comparison 

between the AC-clocked circuit and the DCpower supply 

circuit shows that there is effective energy consumption 

favorable to the AC –clocked gate. 

Keywords: DCVSL, full adder, AC-clocked logic gate 

and energy consumption 

An EM Simulation and Design of a GTEM 

Chamber for EMC Pre-Compliance Tests on 

Electronic Board and ICs in 500 MHz 18 GHz 

Range 


In: MOMAG 2010 - 14º SBMO – Simpósio Brasileiro de 

Microondas e Optoeletrônica e 9º CBMAG – Congresso 

Brasileiro de Eletromagnetismo 

Vila Velha -ES- Brasil Sep-2010 pp:753-757 

Abstract: the design and simulation of a GTEM - Gigahertz 

Transverse Electromagnetic chamber employed in 

precompliance tests and electromagnetic compatibility for 

automotive, electronic boards and integrated circuits are 

presented on this work. The physical conception of the chamber 

projected for a range from 500 MHz – 18 GHz. The APEX 

(match between RF excitation and the body of the chamber ) 

design is minutely shown. This chamber has significant 

advantages over equivalent systems: TEM cell, Near Field Test 

Setup, Open Area Test Site (OATS) and others, due to the 

extended frequency range and mainly in economic terms 

compared to the commercial available chambers. 

Keywords: GTEM, Integrated Circuits, EMC, EMI 

Análise Teórica de EDFAs com Controle 

Totalmente Óptico de Ganho 

Rafael Martins Buck De Godoy, Aldario Chrestani Bordonalli 




Vila Velha-ES-Brasil Set-2010 pp:211-216 

Abstract: Realizou-se um estudo do amplificador a fibra 

dopada com Érbio, considerando-se bombeio na direção copropagante, 

que resultou num modelo matemático de seu 

comportamento operacional. Além disso, levando-se em conta 

o aumento do número de canais como uma forma de ampliar a 

capacidade de transmissão e adotando-se as funcionalidades 

propostas para as redes ópticas atuais, acresceu-se ao modelo 

desenvolvido uma rotina que simulasse o controle de ganho 

totalmente óptico. Como resultado, obteve-se um programa de 

simulação que permite prever o comportamento do 

amplificador de ganho controlado sob diversas condições de 

operação de rede, tornando-se uma ferramenta útil na análise e 

projeto de EDFAs para redes reconfiguráveis. 

Keywords: EDFA, AOGC, métodos numéricos, ganho 

óptico, simulação. 

Circuito eletrônico para emulação de sensores 

em fibras ópticas com grades de Bragg 

excitados por lasers semicondutores com 

módulos termoelétricos 

Pedro Carvalhaes Dias, Elnatan Chagas Ferreira, Maurício 

Silveira 

In: COBENGE' 2010 

Fortaleza, CE Set-2010 pp:1-3 

Abstract: Este trabalho apresenta um circuito desenvolvido 

para permitir a realização de experimentos em laboratório 

envolvendo interrogadores eletrônicos para sensores com 

grades de Bragg em fibras ópticas. Os lasers semicondutores 

DFB são elementos que facilmente são queimados ao serem 

empregados em laboratórios, e junto com as grades de Bragg e 

os outros componentes ópticos de um sistema de interrogação 

convencional, têm custo muito alto (da ordem de grandeza de 

um osciloscópio digital), e as escolas de engenharia não podem, 

em geral, disponibilizar estes componentes para experimentos 

em laboratórios de graduação. O circuito desenvolvido emula o 

comportamento de um sistema laser+sensor com grade de 

Bragg+módulo termoelétrico, permitindo que os alunos 

realizem experimentos com interrogadores destes sensores sem 

utilizar os componentes ópticos de alto custo necessários em 

um sistema de medidas convencional. 

Keywords: Laboratório de graduação, Sensores com 

grades de Bragg, Circuitos emuladores, Sensores a 

fibras opticas. 

Collaborative Distance Teaching of Electronics 

in Synchronous and Asynchronous 

Environments Using Free Software 

Luís Rogério Gomes de Almeida, José Antonio Siqueira Dias 

In: IEEE.AM - Advances in Communications, Computers, 

Systems, Circuits and Devices 

Puerto de La Cruz, Tenerife – Spain Dec-2010 pp:239-244 

Abstract: The aim of this work was to diversify the supply of 

vocational training in electronics by developing a methodology 

based on synchronous and asynchronous distance teaching with 

access to a specific software for the realization of Online 

experiments. Despite the fact that Online courses exist in a 

great quantity, only a few of them deal with complex 

technologies and collaborative practical activities. 

Keywords: Distance Learning, Learning Environments, 

Teaching Electronics in Distance. 


Electromagnetic Analysis of Very Large Field 

Problems Using a Hybryd Numerical Technique 

Juliano Fujioka Mologni, Mateus Bonadiman, Leandro 

Percebon, Cesareo de La Rosa Siqueira, Marco Antonio Robert 

Alves, Filipe Braumgratz and Edson Fonseca 




Vila Velha-ES-Brasil Sep-2010 

Abstract: Electromagnetic analysis of large and open 

radiating problems at high frequencies is very complex when 

using the finite element method (FEM) numerical technique. 

Since the element size is proportional to the wavelength, a great 

amount of computational resources is required to solve the 

problem. On the other hand, alternative methodologies like the 

method of moments (MoM) shows some constraints regarding 

the excitation of the sources and a considerable higher demand 

of computer power when analyzing dielectric materials. We 

present a hybrid technique available on Ansys’ High Frequency 

Structure Simulation (HFSS) software consisted by the FEM 

and the full wave MoM integral equation methodologies. To 

demonstrate the feasibility and the benefits of this technique, a 

parabolic dish excited by a conical horn antenna was placed on 

a 4m height tower and a complete electromagnetic analysis was 

carried out at 4GHz. Numerical results are shown and the 

hybrid procedure is detailed. This methodology enables the 

simulation of very large scale structures at high frequencies 

with a significantly moderate usage of computational resources. 

Estudo e compensação da deriva térmica, 

estabilidade do fator de escala e linearização de 

um circuito de condicionamento e 

processamento de sinais de girômetro 

interferométrico a fibra óptica 

Elnatan Chagas Ferreira, Rodrigo Horikawa Watanabe, Jose 


In: VI Simpósio Brasileiro de Engenharia Inercial (SBEIN) 

Rio de Janeiro, RJ Set-2010 pp:1-6 

Abstract: A proposta deste trabalho é realizar o estudo e o 

desenvolvimento de uma técnica de compensação da deriva de 

temperatura no circuito eletrônico do girômetro, afim de 

melhorar a performance do mesmo. Para emulação do circuito 

óptico, foi desenvolvido um software em LabVIEW. O 

software controla um gerador de onda arbitrarias e calcula a 

saída do fotodiodo através da formulação teórica. Os resultados 

da emulação quando comparados com os valores teóricos do 

sinal de Sagnac apresentaram um erro de apenas ±0, 02%. Foi 

desenvolvido também um sistema de calibração que utiliza a 

técnica look-up-table para compensação da deriva térmica, 

estabilidade do fator de escala e para linearização do circuito de 

condicionamento de sinais. Os resultados obtidos com as 

compensações se mostraram bastante importantes, melhorando 

a deriva do bias de 0, 15◦/h para 0, 065◦/h em uma faixa de 

temperatura de 35◦C a 75◦C; estabilidade do ganho de 

±1000ppm para ±175ppm em uma faixa de temperatura 35◦C `a 

75◦C e a linearidade da resposta do circuito eletrônico de 3% 

para 0, 03%. 

Keywords: giroscópio, girômetro, deriva térmica, 

calibração 

NCMA Otimizado para Mitigação de Interferentes 

Rectilineares Aplicado a Arranjos de Antenas 

Adilson Chinatto, Cynthia Cristina Martins Junqueira, Joãoo 

Marcos Travassos Romano 

In: XII Simpósio de Aplicações Operacionais em Áreas de 

Defesa (XII SIGE) 

São Jose dos Campos-SP Out-2010 pp:1 - 6 

Abstract: O uso de arranjos de antenas para a mitigação de 

interferentes têm sido mostrado na literatura como um 

instrumento inovador em aplicações civis e militares. Os 

algoritmos não supervisionados podem ser considerados nestas 

aplicações objetivando evitar procedimentos de treinamento e 

tornar as transmissões e recepções mais eficientes e seguras. 

Aliando estes fatos à possibilidade de explorar as vantagens do 

processamento largamente linear, neste trabalho mostra-se o 

desempenho de uma versão otimizada do algoritmo do Módulo 

Constante Normalizado para sinais rectlineares. Resultados de 

simulações confirmam seu desempenho superior quando 

comparado à versão original estritamente linear. 

Keywords: Arranjo de Antenas, Algoritmo do Módulo 

Contante, Sinais Rectilineares 

Optical Torque Analysis of Double-Negative 

Optical Trapping with Focused Gaussian Beams 

Leonardo André Ambrósio, Hugo Enrique Hernandez Figueroa 


Recife, PE Sep-2010 pp:1 - 6 

Abstract: Preliminary results of the optical torques exerted on 

negative refractive index spherical particles trapped by focused 

Gaussian beams are shown, based on the generalized Lorenz- 

Mie theory and the integral localized approximation, revealing 

new trapping behaviors. 

Polarization Dependent Loss in Hybrid Photonic 

Crystal Fibers 

Daniel Grandin Lona, Arismar Cerqueira Sodre Junior, G. 

Stefanini, Hugo Luis Fragnito, Hugo Enrique Hernandez 

Figueroa 




Vila Velha -ES- Brasil Sep-2010 pp:1 - 6 

Abstract: We have experimentally investigated the 

polarization dependent loss in Hybrid Photonic Crystal Fibers. 

It was obtained a power variation of 23 dB between the two 

polarization states. This power loss dependence was analyzed 

for different fibers as a function of photonics bandgaps 

positions. 

Keywords: Photonic Crystal Fibers (PCF), Hybrid 

Photonic Crystal Fibers, Polarization-Maintaining 

Fibers (PMF) 

Problema Inverso de PBG Absoluta em 

Dielétrico Anisotrópico via Computação Bio- 

Inspirada 

Gilliard Nardel Malheiros Silveira, Hugo Enrique Hernandez 

Figueroa, Vitaly F. Rodrigues 




Vila Velha - ES - Brasil Set-2010 pp:1 - 6 

Abstract: O Método dos Elementos Finitos (FEM) e 

Algoritmos genéticos (AG) foram utilizados para solução de 

problemas inversos envolvendo busca e maximização de 

Bandas Fotônicas Proibidas absolutas. Foram avaliados cristais 

com arranjos quadrados, constituídos por ar e telúrio (dielétrico 

anisotrópico). Problemas inversos desse porte são custosos 

computacionalmente, assim os band gaps foram calculados nos 

nós da primeira 

Keywords: Cristais Fotônicos, Photonic Band Gap, 

Anisotropia uniaxial, Algoritmos Genéticos, Elementos 

Finitos 

Rede de sensores sem fio de baixo custo para 

monitoramento ambiental 

Marcel S. Silva e Fabiano Fruett 




Brasil Set-2010 pp:2351-2356 

Abstract: This paper presents a Wireless Sensors Network 

designed for monitoring Temperature, Relative Humidity and 


Atmospheric Pressure in the Amazon Rainforest. A 32-bit 

microcontroller and a transceiver module working in the ISM 

frequency range are used to compose the sensor nodes, 

providing energy optimization, while several sensors are used 

to perform measurements, like a Temperature and Humidity 

sensor with digital interface from Sensirion. The measurements 

are accessed by a web page embedded in a microcontroller and 

available through an IP address, that allows access to the data 

acquired in real time. Tests performed with a first prototype 

allowed the sensors network, at low cost, to be implemented to 

monitor temperature and humidity remotely. 

Keywords: Wireless Sensor Network, Amazon, Remote 

Sensors, Embedded Systems 

Redes de sensores sem fio: uma abordagem 

prática 

Yull Heilordt Henao Roa, Fabiano Fruett 




Brasil Set-2010 pp:2329-2336 

Abstract: This paper presents an overview of some of the 

Wireless Sensors Network (WSN) characteristics and setting up 

a pear-to-pear network with two and three nodes, using a 

Microcontroller Sport Activities Monitoring System (SAMS) 

and the ZigBee XBee/XBeePro modules from Digir. 

Acceleration and rotation microelectromechanical sensors 

(MEMS) and a temperature sensor are included in the SAMS 

hardware node. A graphical interface based on a LabVIEW 

Virtual Instrument (VI) was developed for each of the networks 

proposed. This article also presents the difficulties, cares and 

limitations encountered during the WSN implementation. 

Keywords: WSN, Sensors, Virtual Instrumentation 

Sensor network for energy-efficiency programs: 

characterization and breakdown of the electricity 

bill using custom wireless smart meters 

Luís Fernando Caparroz Duarte, José Douglas Bertazzoni 

Zambianco, Douglas Airoldi, Elnatan Chagas Ferreira, Jose 


In: International Conference on Circuits, Systems, Signals 

(CSS'10) - ISBN: 9789604742264 

Malta Sep-2010 pp:262-265 

Abstract: Understanding and monitoring the electrical energy 

use is fundamental to encourage consumers and small business 

owners to implement energy-efficiency measures and, 

therefore, to cut their energy bills significantly. This works 

presents the design, development and implementation of an 

electrical energy monitoring sensor network which can be 

easily installed to measure and monitor the energy use of every 

appliance in a house, presenting to the consumer a detailed 

report of the energy spent by each electrical device (TV, lights, 

showers, etc.). The measuring units and a coordinator form a 

wireless network, which is capable of measuring the electrical 

energy and recording the data of each home appliance in the 

flash memory of the coordinator. The data stored in the 

coordinator is sent (via a wireless connection) to a computer 

where the analysis of the data is performed and a detailed report 

of the energy breakdown is presented. 

Keywords: PLC, Power meter, Sensor network, ZigBee. 

Sistema autônomo descentralizado de irrigação 

localizada para pomares auxiliado por sensor de 

umidade do solo 

Luís Fernando Caparroz Duarte, Wellington Roque, Elnatan 

Chagas Ferreira, Jose Antonio Siqueira Dias 

In: XXI Congresso Brasileiro de Fruticultura 

Natal, RN Out-2010 pp:1-4 

Abstract: Melhorar a eficiência da agricultura e reduzir seu 

impacto ambiental são necessidades cada vez mais expressivas 

no meio agrícola. Para alcançar resultados satisfatórios na 

proteção do meio ambiente sem deixar de buscar por patamares 

mais elevados de produtividade, é necessária a utilização de 

técnicas avançadas para o manejo das culturas. A agricultura de 

precisão vem sendo cada vez mais estudada e desenvolvida, e o 

uso da tecnologia da informação para processar dados 

específicos de áreas geograficamente referenciadas e interferir 

nas culturas de acordo com suas necessidades individuais é 

forte tendência. Neste trabalho é apresentado o 

desenvolvimento de um sistema de irrigação localizada 

georeferenciado para pomares, com sensores-atuadores 

inteligentes, independente de um controlador central ou de uma 

rede de dados atuante em tempo integral. 

Keywords: Redes de sensores, sensores para 

agricultura, agricultura de precisão, irrigação 

localizada 

Supressão da Informação da Portadora óptica 

através da Saturação do Ganho de um SOA 

Ultra-Longo 

Napoleão dos Santos Ribeiro, André Luiz Rayol Cavalcante, 

Cristiano de Mello Gallep, Evandro Conforti 





Abstract: Apresenta-se uma técnica de supressão da 

informação da portadora óptica baseada na saturação de um 

amplificador óptico a semicondutor ultra-longo (8 mm). Uma 

caracterização desta técnica com relação a diferentes 

parâmetros é realizada, obtendo-se bons resultados de 

apagamento de uma modulação senoidal para altas taxas (até 35 

GHZ) e para elevados valores de razão de extinção do sinal de 

entrada, operando em uma larga faixa de comprimentos de 

onda. Obtevese para a frequência de 15 GHz uma supressão de 

16, 8 dB de razão de extinção de entrada para 3, 9 dB na saída 

do dispositivo. 

Keywords: amplificador óptico a semicondutor, redes 

ópticas de acesso, supressão de modulação, reutilização 

da portadora óptica 


Adequação da nomenclatura de acessórios 

utilizados em vídeo cirurgias e endoscopias no 

complexo da Unicamp 

Giselle Ferrari, Saide Jorge Calil 


(CBEB 2010) - ISBN: 2179-3220 



Abstract: Presently there are several nomenclature systems to 

define medical equipment worldwide. This is producing a 

multiplicity of different names and codes to define the same 

equipment. It also induce to a identification problem among all 

sectors involved in the health system. This work aims to adapt 

the Universal Medical Device Nomenclature System 

(UMDNS), developed by the ECRI INSTITUTE, to better 

define the medical devices belonging to UNICAMP’s health 

complex. The expected outcome is to facilitate the 

communication among the Clinical Engineering department, 

medical personal, technical assistance team and vendors. 

Keywords: Adequação de nomenclatura, Instrumentos e 

aparelhos médicos, Engenharia Biomédica. 

Análise comparativa de dez metodologias de 

análise de causa raiz 

Gustavo A. Elias, Saide Jorge Calil 

In: XXII Congresso Brasileiro de Engenharia Biomédica-2010 

Tiradentes(MG) - Brasil Nov-2010 pp:371-374 

Abstract: When an incident or near miss happens in health 

care, it should be investigated so we can learn from what 


happened and take appropriate action to prevent recurrence of 

such incident. The Root Cause Analysis (RCA) is a 

methodology commonly used to investigate critical incidents. 

This paper analyzes ten methodologies of RCA, five of which 

are specific from healthcare and five are from general 

applications. The methodologies were analyzed and grouped in 

five stages. The ten methodologies were compared for each of 

the five stages, aiming to identify the commonalities and 

differences. The findings are discussed, trying to highlight 

important points that can impact the effectiveness of RCA. 

Keywords: Análise de causa raiz, investigação de 

incidentes, segurança. 

Aplicabilidade do Geant4 para simulação de 

elétrons em radioterapia 

Ana Luiza Metidieri Cruz Malthez, Márcio Aparecido Muller e 

Vera Lúcia Silveira Nantes Button 


(CBEB 2010) - ISBN: 2179-3220 


Tiradentes(MG) Brasil Nov-2010 

Abstract: The study of interaction of radiation with matter is a 

field of great interest in the medical physics. The computational 

simulations tools as Monte Carlo have been used in this field. 

The Geant4 code is a toolkit that have incorporate several 

physical processes and particles that allow its application in 

medical physics, in particular, in the area of radiotherapy. In 

this work we performed simulations of monoenergetic electrons 

beam in the energy range used in radiotherapy, and compared 

the results of range of electrons in the water with the results 

published by the National Institute of Standards and 

Technology (NIST). The simulated results of range were very 

close of published results showing that Geant4 is appropriated 

to electrons simulations with energy in the range of 

radiotherapy. 

Keywords: Física Médica, Método de Monte Carlo, 

Geant4, elétrons 

Applying the HFMEA Technique to the General- 

Purpose Infusion Pump 

R. P. Ferreira, Gerson Florence Carvalheira de Azevedo, Saide 

Jorge Calil 

In: 11th World Congress on Medical Physics and Biomedical 

Engineering - ISBN: 9783642038976 

Munich, Germany Sep-2010 pp:638-341 

Abstract: Attempting to guarantee the quality of infusion 

pumps, a study was performed at a Brazilian public hospital 

applying the Healthcare Failure Mode and Effect Analysis 

(HFMEA). This technique can be applied for usage by the 

clinical engineering, to identify the failure modes of 

electromedical devices (EMD) and to assess the involved risks. 

Through this study, problems that interfere with the 

performance of infusion pumps were identified and 

subsequently some actions were proposed to help reduce the 

risks of these potential problems. These actions certify the safe 

functioning of this device within the standards of safety and 

quality. 

Keywords: infusion pump - HFMEA - risk management - 

clinical engineering 

CAPM para análise de risco financeiro setorial 

em estabelecimentos de saúde 

Maurício Gomes Duarte e Vera Lúcia da Silveira Nantes 

Button 


(CBEB 2010) - ISBN: 2179-3220 



Abstract: With rising costs and revenues, somehow stagnant 

due to heavy dependence on Health Plans, the combination of 

technical quality with the most rigorous financial controls 

became necessary standard of Health Establishments seeking to 

remain on the market. The lack of a scientific method to 

quantify the financial risk of investing in a particular health 

sector in Brazil, or in a aprticular region of the country, makes 

the discount rates (interest) askek by financing agents to be 

defined in terms of improperly generalized indices, which do 

not reflect the actual risk of investment. The purpose of this 

study was to use the CAPM (Capital Asset Pricing Model) to 

determine the financial risk of investing in a particular health 

sector, and this tool showed promising to set the actual viability 

of the investment and time to return it. 

Keywords: risco financeiro, CAPM, taxa de juros, setor 

hospitalar, hospital. 

Classificação de equipamentos médicohospitalares: 

lógica paraconsistente anotada 

Natália Ferreira Oshiyama, José Wilson Magalhães Bassani 


(CBEB 2010) - ISBN: 2179-3220 



Abstract: In this work a classification of medical equipment 

based on corrective maintenance data (number of calls, time 

spent and cost) was developed. Classes were established by the 

Always Better Control analysis. Paraconsistent annotated logic 

was used to identify inconsistencies and indeterminacies in the 

classification. As an example, only 42.5% of the syringe 

infusion pumps were classified as A (the best classification), 

but with a high number of indeterminacies, which was taken as 

an alert for further examination. A drill down procedure 

showed that only one factor (maintenance time) affected 

classification of the pumps. This approach may be helpful for 

planning equipment acquisition and replacement, as well as 

maintenance management. 

Keywords: Medical equipment classification, ABC 

analysis, Paraconsistent Annotated Logic, Clinical 

Engineering. 

Conector uretral para apoio ao exame 

urodinâmico: aplicação clínica 

João Carlos Martins de Almeida, Rodrigo Horikawa 

Watanabe, David Jacques Cohen, Carlos Arturo Levi 

D’Ancona, José Wilson Magalhães Bassani 


(CBEB 2010) - ISBN: 2179-3220 



Abstract: Urodynamics is the gold standard procedure for 

diagnosing bladder outlet obstruction although it is invasive, 

expensive, time consuming and is not free of complications. In 

a previous work, we reported an alternative method developed 

for minimally invasive measurement of the vesical pressure. 

The method consists of a device named urethral connector and 

a portable system for recording the pressure. In the current 

work we aimed at reporting some clinical tests of the method. 

Its results were compared with the results obtained by using 

conventional urodynamics 

Keywords: Urodinânica, instrumentação, obstrução 

infravesical, testes clínicos 

Determinação do efeito da aplicação de ondas 

sonoras na árvore pulmonar de roedores 

durante uma curva pressão volume 

Márcia Zotti Justo Ferreira, Andrea F. da Cruz, Henrique 

Takachi Moriya, Hugo E. Hernández-Figueroa, Adriano 

Mesquita Alencar 


Tirandentes(MG) - Brasil Nov-2010 pp:682-682 

Abstract: Os pulmões dos mamíferos são uma árvore binária 

do tipo Cayley entre 30 e 40 gerações. As trocas gasosas 

acontecem nos alvéolos, localizados nas terminações dessa 


árvore pulmonar. Obstruções totais ou parciais de vias aéreas 

provocam uma obstrução em todos os ramos hierarquicamente 

inferiores a esse ramo, dificultando as trocas gasosas, causando 

desconforto, cansaço e, em casos extremos, podendo até levar a 

óbito. Durante a inspiração, as vias aéreas colapsadas tendem a 

abrir devido ao gradiente de pressão formado entre o topo da 

árvore, traquéia, e as terminações alveolares. Essa abertura 

usualmente é explosiva, emitindo um som característico [1] 

provocando instabilidade na curva pressão volume [2]. Nesse 

trabalho pretendemos testar a possibilidade de que uma onda 

sonora precipite a reabertura dessas vias aéreas e permita sua 

desobstrução promovendo uma redistribuição do volume sem a 

necessidade de altas pressões, o que em casos clínicos pode 

causar um dano ainda maior nos pulmões. 

Keywords: sons pulmonares, curva P-V, elastância. 

Dispositivo auxiliar para ajuste de bombas de 

roletes utilizadas em circulação extracorpórea 

Johannes D. de Medeiros Júnior, Francisco U. Vieira Júnior, 

Nilson Antunes, Reinaldo W. Vieira e Eduardo Tavares Costa 


(CBEB 2010) - ISBN: 2179-3220 



Abstract: Roller pumps play an important role in 

cardiopulmonary bypass. However, the occlusion of the pump 

must be set properly; this can be achieved by the static and the 

dynamic methods. In this work we present a device used to 

assist the perfusionist setting roller occlusion. The device was 

designed to be used along with disposable blood pressure 

transducers that are commonly used in cardio-pulmonary 

bypass surgeries. The system is based on a PIC 18F4523 

microcontroller to determine the applied mean pressure in the 

bypass circuit. We have performed static and dynamic pressure 

tests. Our results have shown that the device can be used to 

assist the perfusionist to perform the dynamic calibration 

method for setting roller occlusion. 

Keywords: Circulação extracorpórea, calibração 

dinâmica, bomba de roletes, microcontrolador PIC 

Dispositivo Auxiliar para Ajuste de Bombas de 

Roletes Utilizados em Circulacion Extracorpórea 

Francisco Ubaldo Vieira Júnior, Eduardo Tavares Costa, 

Reinaldo Wilson Vieira, N. Antunes, J. D. Medeiros Júnior 

In: VII Congresso LatinoAmericano de Tecnologia 

Extracorpórea 

Lima, Peru Oct-2010 pp:1-4 

Abstract: Introdução: Bombas de roletes desempenham um 

papel importante na circulação extracorpórea. No entanto, a 

oclusão das bombas deve ser realizada de forma adequada e 

podem ser ajustadas, principalmente pelos métodos estático e 

dinâmico. Objetivo: O objetivo deste trabalho é apresentar um 

dispositivo para auxiliar o perfusionista no ajuste de bombas de 

roletes, em centro cirúrgico, pelo método de calibração 

dinâmica. Métodos: O dispositivo foi projetado para ser usado 

junto com transdutores de pressão descartável que são 

comumente usados em cirurgias envolvendo circulação 

extracorpórea. O sistema foi baseado em um microcontrolador 

PIC 18F4523 IM para calcular a pressão média de calibração 

dinâmica. Foram realizados testes de pressão estática em 

transdutores descartáveis de pressão de dois fornecedores. A 

resposta dinâmica do dispositivo foi testada e os resultados de 

resposta no tempo foram comparados com o auxilio de um 

sistema de aquisição de dados comercial. Resultados: Os 

transdutores de pressão de dois fabricantes mostram igualdade 

nas respostas (p>0, 6). Os testes com o dispositivo associado 

aos transdutores mostraram erro, histerese e repetitividade 

menores que 3%. Todos os testes dinâmicos de medidas de 

pressão para comparação do dispositivo com sistema comercial 

mostraram igualdade estatística (p > 0, 05). Conclusão: Os 

resultados preliminares em laboratório demonstram que o 

dispositivo mostrou facilidade e praticidade de uso bem como 

rapidez para o ajuste. Em nossa opinião pode ser facilmente 

usado em centro cirúrgico. Testes de fadiga do conjunto estão 

sendo conduzidos antes de iniciar testes de campo. 

Keywords: Circulação extracorpórea, Bomba de roletes, 

calibração. 

Efeito de múltiplas repetições para 

caracterização de movimentos por 

mecanomiografia 

Guilherme Nogueira Nogueira-Neto, Gean Francesco Chu, 

Eddy Krueger-Beck, Eduardo M. Scheeren, Percy Nohama e 

Vera Lúcia da Silveira Nantes Button 


(CBEB 2010) - ISBN: 2179-3220 



Abstract: People with amputation have restrictions in their 

daily lives. Mechanomyography (MMG) sensors can be used in 

electromechanical prosthesis control. The goal of this work was 

to investigate the ability of triaxial MMG to distinguish wrist 

movements (flexion, extension, radial deviation and ulnar 

deviation) analyzing repeated muscular contractions. Two 

sensors (medial and lateral) were positioned in the volunteer’s 

forearm. The RMS and the zero-crossing features were 

analyzed. The MMG modulus identified more differences than 

the Z axis. The medial sensor presented a better performance 

than the lateral sensor in the differentiation of wrist movements. 

Keywords: mecanomiografia, contrações repetidas, 

movimentos de punho 

Engenharia clínica e infraestrutura, podem 

trabalhar juntas? 

P. A. Figueiredo e Saide Jorge Calil 


(CBEB 2010) - ISBN: 2179-3220 



Abstract: This work demonstrates the feasibility of the of 

Clinical Engineering and Hospital Infrastructure areas working 

under a single coordination in a large public hospital. 

Management tools were applied to the administration area 

(SWOT Analysis) and the concepts of Clinical Engineering for 

the group of employees to build a new organization chart and 

not harm the characteristics of each particular area. The end 

result was fully positive, with the integration of the areas and 

the consequent improvement in patient care. 

Keywords: clinical engineering, swot analysis, hospital 

management. 

Estudo da interação entre o ultrassom com 

frequência de 1MHz e o tecido cardíaco 

Elaine Belassiano, Rosana Almada Bassani e Eduardo Tavares 

Costa 


(CBEB 2010) - ISBN: 2179-3220 



Abstract: In cardiology, diagnostic ultrasound is well 

established, whereas there is an unexplored potential for 

therapeutic applications. Aiming to develop new therapeutic 

applications, the interaction between ultrasound (1 MHz 

frequency, 325.5mW average power) at different excitation 

modes and the cardiac tissue is investigated. Experiments were 

conducted on Wistar rat isolated hearts (n=4) placed inside a 

perfusion chamber. While being irradiated by ultrasound 

through an acoustic window, the beating hearts were connected 

to a force transducer. The systolic tension and the heart rate 

were monitored. There was a statistically significant difference 

(p

Keywords: interação, ultrassom, tecido cardíaco. 

Influência da caixa torácica na elastância 

pulmonar: análise de curvas pressão-volume na 

inspiração 

Márcia Zotti Justo Ferreira, Thiago Henrique Gomes Silva, 

Marjorie F.R. Silva, Adriano Mesquita Alencar, Hugo E. 

Hernández-Figueroa, Henrique Takachi Moriya 


Tiradentes(MG) - Brasil Nov-2010 pp:477-480 

Abstract: The interaction between lungs and chest wall 

determines lung volume, which plays a central part in 

respiratory activity. In this study, the influence of chest wall 

mechanics on the respiratory system is quantified through 

measurements of (i) sigmoidal equation parameters of the 

pressure- volume curve and (ii) elastance under closed- a openchest 

situations. A supporting property of the chest wall was 

observed at the beginning of inspiration. At larger volumes, a 

restricting property of the chest wall was observed. Those 

behaviors are reflected in differences in the pressure-volume 

curve and elastance estimatives for each situation. It is 

suggested that those effects be taken into account in 

experiments performed in open-chest situations. 

Keywords: caixa torácica, curva P-V, elastância 

Metodologia para identificação de riscos 

relacionados a equipamentos médicos 

Maurício Gomes Duarte e Vera Lúcia da Silveira Nantes 

Button 


(CBEB 2010) - ISBN: 2179-3220 



Abstract: The objective of this work was to obtain a simple 

methodology for identifying risks caused by medical 

equipments in hospitals and also the inherent risks of different 

hospital sectors, which are known in advance and have their 

own control mechanisms. Our proposal was to identify, within 

the Clinical Engineering view, risks of procedures and work 

routines implemented inefficiently or even the lack of them, 

which direct or indirectly lead to the uprise or increase the 

levels of risk. We choose to obtain data through the perception 

and knowledge of health environment employees. These 

informations allow identifing risks and their causes in an easy 

way to inform the health establishment which are the points that 

must be worked. 

Keywords: risco, segurança, treinamento, equipamentos 

médicos. 

Métodos de compressed sensing para 

compressão de sinais ECG 

André K. Takahata, Crstiano M. Agulhari, Leonardo T. Duarte, 

Renato R. Lopes, Pedro L. D. Peres, João Marcos T. Romano 


(CBEB 2010) - ISBN: 2179-3220 



Abstract: Recent works have been applying a new theory 

called Compressed Sensing (CS) as a framework for the 

compression of biomedical signals. One of the main advantages 

of this strategy is the simplicity of the coding step. Such a 

feature is important, for instance, in the development of lowcost 

remote acquisition systems. Motivated by such a possibility, we 

investigate the application of CS methods to the compression of 

electrocardiogram (ECG) signals. A set of numerical 

experiments is conducted with the aim of assessing the 

performance obtained by this new approach and comparing it 

with more classical schemes, such as a direct compression 

based on wavelets. 

Keywords: Sensoriamento comprimido, compressão de 

sinais, ECG 

Modelo matemático do retículo sarcoplasmático 

funcionalmente isolado em miócitos cardíacos: 

influência de buffers de Ca 2+ 

Marina Carneiro Monteiro, Rosana Almada Bassani, Jose 

Wilson Magalhaes Bassani 


(CBEB 2010) - ISBN: 2179-3220 



Abstract: The mathematical model of the functionally isolated 

sarcoplasmic reticulum, previously developed in our laboratory, 

was modified to introduce intracellular and intrareticular Ca 2+ - 

binding sites (buffers). Ca2+ transients obtained experimentally 

in cardiac myocytes, by application of brief caffeine pulses in 

Na+ and Ca2+-free medium, were compared to transients 

generated in silico in the same condition. Results indicate that 

introduction of intracellular Ca2+ buffering resulted in a more 

realistic simulation of the behavior of cardiac myocytes. 

Keywords: RyR, retículo sarcoplasmático, buffers de 

Ca 2+ , cafeína, modelo matemático 

Myocardial Catecholaminergic Automatism: Role 

Of β-Adrenoceptor Subtypes and 

Phosphodiesterases 

Rosana Almada Bassani, Jose Wilson Magalhaes Bassani 

In: XVIII Meeting of the International Society of Heart 

Research (ISHR) Latin American Section 

La Plata- Argentina Oct-2010 pp:1 - 1 

Abstract: Catecholamines are physiological stimulators of 

cardiovascular function, but they may also cause arrhythmias. 

In isolated rat ventricular myocytes, spontaneous contractions 

in response to catecholamine stimulation are Ca 2+ -dependent, as 

they are suppressed by inhibition of the sarcoplasmic reticulum 

function. Experiments with selective adrenoceptor (AR) 

antagonists revealed that β1-, but not α1- or β2-ARs, mediate 

catecholaminergic automatism in these preparations. 

Simultaneous β1- and β2-AR stimulation by isoprenaline (ISO) 

was less effective at inducing automatism than activation of β1- 

ARs alone. Beta2-AR blockade enhanced automatism in 

response to ISO, whereas background β2-AR stimulation by 

salbutamol (SAL) inhibited the automatic response to 

noradrenaline. The latter effect was reversed by β2-AR 

blockade. Inhibition of either phosphodiesterase isoform PDE3 

or PDE4 potentiated catecholaminergic stimulation of 

automatism. However, only PDE4 inhibition was able to 

reverse the anti-automatic effect of SAL. We thus conclude that 

β2-AR activation antagonizes the β1-AR-mediated stimulation 

of myocardial automatism, possibly via increased cAMP 

degradation by PDE4 stimulation. Support: CNPq and FAPESP 

Brasil). 

Keywords: β-Adrenoceptor, automatism, heart 

Proposta de ferramenta de engenharia clínica 

para a identificação de riscos e viabilidade 

técnica de projetos de produtos 

Eduardo Jorge Valadares Oliveira, Vera Lúcia da Silveira 

Nantes Button e Vivian Cardoso de Morais Oliveira 


(CBEB 2010) - ISBN: 2179-3220 



Abstract: This paper presents a Clinical Engineering tool used 

to identify and quantify the risks and feasibility of products 

developing projects, in particular cooperative projects between 

the Scientific and Technological Institutions (ICT) and firms. 

The tool addresses the risk factors related to market, 

technological, regulatory, financial, economic and conjectural 

issues. It is believed that the use of the tool in the evaluation of 

technological projects will boost the success rate of this type of 

enterprise. 


Keywords: Engenharia Clínica, Projetos Tecnológicos, 

Complexo Industrial da Saúde, Ferramentas de Análise 

de Viabilidade. 

Radiação Ionizante da Mamografia: Diagnóstico 

ou Indução ao Câncer 

Clarissa Fernanda Correia Lima Loureiro, Sergio Santos 

Muhlen, Carmen Silvia Bertuzzo 


(CBEB 2010) - ISBN: 2179-3220 



Abstract: Establishing the biological effects and the safe level 

of exposure to ionizing radiation remains so far an elusive 

issue. Mammography is an important exam in the early 

detection of breast tumors, but since the genes BRCA1 and 

BRCA2 were identified as a main cause of hereditary breast 

cancer, there is growing concern that exposure to ionizing 

radiation could increase mutations in these genes and promote 

the development of cancer in young women. In this paper we 

propose an in vitro experiment where breast cells from one 

patient are irradiated with different doses of X-rays from 

mammography, in order to determine the trigger level of 

mutation, and thus a safer level of radiation for patients 

carrying a mutated allele of either genes BRCA1 or BRCA2. 

Keywords: Mamografia, câncer de mama, radiação 

ionizante, BRCA, risco radiológico. 

Redução da Dose Ocupacional em Fluoroscópia 

Mariana Sacrini Ayres Ferraz, Sergio Santos Muhlen 


(CBEB 2010) - ISBN: 2179-3220 



Abstract: Catheterism in medical procedures is responsible 

for high X-ray doses, both to patients and medical staff. Aiming 

to reduce this dose, modern fluoroscopy equipment have been 

developed using pulsed X-ray. This study presents the results of 

measurements of occupational doses received during simulated 

medical procedures, both for pulsed and continuous 

fluoroscopy, and the calculations allowing quantifying the 

reduction caused by the use of pulsed technology. Moreover, a 

mapping of radiation intensities was performed in the 

Laboratory in order to suggest better places (lower occupational 

doses) for personnel during medical procedures. 

Keywords: Dose ocupacional, Controle de dose, Raios 

X, Fluoroscopia. 

Sistema Digital Gerador de Forma de Onda 

Arbitrária para Aplicações de Ultrassom 

Amauri Amorin Assef, Joaquim Miguel Maia, Renan Broska 

Amstrong, Henrique Mineo Ashihara, Eduardo Tavares Costa, 

Vera Lucia Da Silveira Nantes Button 


(CBEB 2010) - ISBN: 2179-3220 



Abstract: This paper presents the development of a 8-channel 

digital high-speed ultrasound beamfoming transmitter. The 

hardware architecture is controlled by Altera Cyclone III FPGA 

Development Kit (EP3C120F780) and allows the flexibility for 

multiple ultrasound transmit beamforming waveform with 

Gaussian profile, adjustable frequency, amplitude apodization 

and phase angle control. The system uses 8 ultrasound 

beamforming transmitter Supertex MD2130 and reception 

circuits with protection against high voltage. The results 

demonstrated that the developed system can be used as 

ultrasonic phased arrays focusing transmitter. 

Keywords: Ultrassom, Tx beamforming, FPGA. 

Sistema Hipermídia de Apoio ao Ensino Técnico 

de Equipamentos Médicos-Hospitalares 

Debora Dias Leister Batista, Glades Serra, Sergio Santos 

Muhlen 


(CBEB 2010) - ISBN: 2179-3220 



Abstract: This article presents the construction and evaluation 

of a hypermedia system to facilitate technical teaching of 

medical-hospital equipment, in a technician preparation course 

supported by an industrial institution, aiming to contribute for 

the teach-learning process. In this first version, the hypermedia 

system is focused in one equipment (cardiac defibrillator). It 

was evaluated by a selected group of students, having passed a 

pre-test to determine their previous knowledge on the matter, 

then using the system proposed, and a post-test to evaluate the 

gain. The results showed the learning level was significantly 

greater among students that used the hipermedia system, 

confirming its value for the teaching-learning process. 

Keywords: Hipermídia, Ensino-aprendizagem, Ensino 

técnico, Desfibrilador. 

Superioridade do Alumínio em Blindagens 

Eletromagnéticas no Ambiente Hospitalar 

Rafael Navet de Souza, Sergio Santos Muhlen 


(CBEB 2010) - ISBN: 2179-3220 


Tiradentes(MG) Brasil Nov-2010 pages:322 

Abstract: A prevenção de interferência eletromagnética (EMI) 

é um tema em crescente demanda devido à abundância de 

fontes potenciais de interferências próximas a dispositivos 

eletrônicos suscetíveis, presentes no ambiente hospitalar. 

Equipamentos terapêuticos e de diagnóstico médico por 

imagem tendem a interferir uns nos outros em função dos altos 

níveis de potência envolvidos, e da possibilidade de 

acoplamento entre si e com dispositivos de telecomunicações 

[1]. Sistemas de imagem por ressonância magnética (MRI) são 

ferramentas diagnósticas poderosas e por isso são cada vez 

mais populares em unidades de saúde, porém estão entre as 

tecnologias suscetíveis de EMI e geradoras de interferência de 

rádio frequência (RFI). Para um funcionamento seguro e 

confiável de sistemas de MRI é necessário uma blindagem de 

RFI para garantir que a imagem do equipamento não seja 

afetada por interferências externas causadas por sinais de 

emissoras de rádios e outros equipamentos que trabalham na 

faixa de frequências entre 10 e 150 MHz. Em alguns casos a 

utilização de blindagem magnética se faz igualmente 

necessária, principalmente quando o sistema de MRI é 

instalado próximo a fontes de campos magnéticos potentes na 

faixa de 50/60 Hz (e.g. transformadores, motores elétricos, 

cabos de potência, entre outros) [2]. Blindar campos 

magnéticos de baixa frequência é um problema não totalmente 

resolvido em função das dificuldades práticas na construção de 

blindagens eficientes. Blindagens por absorção normalmente 

necessitam a instalação de paredes espessas, construídas com 

materiais caros, porém, blindagens com base no princípio da 

indução de corrente podem ser razoavelmente eficazes em 

frequências de 50/60 Hz, se construídas com materiais 

condutivos próximas às fontes de origem do campo [3]. Cobre 

ou alumínio são utilizados neste tipo de solução, e podem ser 

vantajosos na comparação com os materiais ferromagnéticos 

tradicionais para conter os campos magnéticos gerado por 

sistemas de MRI [4] [5]. 

Keywords: Blindagem magnética, Interferência 

eletromagnética, Ambiente hospitalar. 


Time and angular variations in different 

neuromuscular electrical stimulation profiles 

Eddy Krueger-Beck, Eduardo M. Scheeren, Guilherme N. 

Nogueira-Neto, Eduardo B. Neves, Vera Lúcia Silveira Nantes 

Button, and Percy Nohama 


(CBEB 2010) - ISBN: 2179-3220 



Abstract: Muscle fatigue and/or motoneurons adaptation 

during neuromuscular electrical stimulation (NMES) are 

characterized by an ineffectiveness and short-term use ability. 

In this study, we evaluated the efficiency of five NMES profiles 

randomly applied to the quadriceps muscle of healthy 

volunteers (N=10). Each profile had 1 kHz pulses (100 µs or 

200 µs on and 900 µs or 800 µs off, respectively) with burst 

frequencies of 50 Hz (3 ms on and 17 ms off) or 70 Hz (3 ms 

on and 11 ms off). Better results to maintain knee angle were 

obtained with 50 Hz burst frequency. Time and angular 

variation during NMES are reliable to assess muscular fatigue 

and/or motoneurons adaptation. 

Keywords: NMES, electrogoniometer, fatigue 

Utilização do coeficiente aparente de difusão 

obtido através de imagens de ressonância 

magnética na diferenciação e caracterização de 

tumores cerebrais in vivo 

Edna Marina Souza, Gabriela Castellano, Eduardo Tavares 

Costa 


(CBEB 2010) - ISBN: 2179-3220 



Abstract: In diffusion-weighted magnetic resonance imaging 

(DWI), the contrast is determined by the random microscopic 

motion of water protons. In general, pathologic processes, such 

as neoplasic cell changes, tend to alter the magnitude of 

structural organization by destruction or reorganization of 

membranous elements or by a change in cellularity. These 

changes will also have an impact on proton mobility, which can 

be followed up by DWI. From DWI is obtained the ADC 

(Apparent Diffusion Coefficient) map, which is a representation 

of the magnitude of water diffusion at the points of a given 

region of interest (ROI). The purpose of this study was to 

develop a tool for computation of ADC maps and their 

application to the characterization of the following brain 

tumors: multiform glioblastoma and meningioma. The mean 

ADC values found on meningioma (5.03±0, 67)x10 -4 mm2/s, 

glioblastoma (2.83±0, 45)x10 -4 mm2/s and controls 

(8.65±0.98)x10 -4 mm2/s allowed the differentiation between 

these types of tumors and between tumors and healthy brain 

tissues. 

Keywords: ressonância magnética, difusão, tumores 

cerebrais 


A Locality Sensitive Hashing Approach for 

Conceptual Classificat 

Luciano Bernardes De Paula, Rodolfo Da Silva Villaça, 

Mauricio Ferreira Magalhaes 

In: Fourth IEEE International Conference on Semantic 

Computing - ICSC 2010 

Pittsburgh--USA Sep-2010 pp:408-413 

Abstract: The increasing volume of semantic content 

available in the Web, generally classified by concept 

hierarchies or simple ontologies, turns the searching and 

reasoning upon these data a great challenge. Generally, a search 

in Semantic Web may not be addressed to a specific document, 

but to a group of data classified in the same concept. Several 

structures used to distribute data, e.g. P2P networks, use hash 

values to identify these data, without maintaining the semantic 

values of the stored data. This paper contributes by proposing 

the creation of hash values that keep similar data stored near to 

each other in a P2P network, reducing the effort to retrieve 

similar data. The proposed hash values are derived from the 

data classification based on ontologies, using locality sensitive 

hashing (LSH) functions. 

Keywords: Locality Sensitive Hashing (LSH), ontology, 

Peer to Peer Networks 

A Platform for Networked Robotics. 

Eleri Cardozo, Eliane Gomes Guimarães, Ricardo Alves De 

Souza, Lucio Agostinho Rocha, Fernando Paolieri Neto, 

Fernando Pinho 

In: International Conference on Intelligent Robots and Systems 

- IROS - ISBN: 978-1-4244-6674-0 

Taiwan, China Oct-2010 pp:1000 - 1005 

doi: 10.1109/IROS.2010.5650323 

Abstract: Most of the environments where mobile robots are 

deployed offer a comprehensive networking infrastructure. In 

order to take part of these environments, mobile robots must 

enhance not only their communication capabilities, but also 

their interaction capabilities. Current robotic frameworks are 

oriented to gather data from the robotic sensors and to act on 

the robot's actuators. In other words, such frameworks are 

oriented to perform embedded control functions. In order to 

provide mobile robots with enhanced interaction capabilities 

robotic applications must rely on networking solutions focusing 

on integration, communication, and security. This paper 

presents a platform for networked robotics that favors the 

integration of mobile robots with other networked devices, 

providing a secure and federated access to the mobile robots. 

Keywords: embedded control functions, enhanced 

interaction capabilities robotic applications, mobile 

robots, networked devices, networked robotics, robot 

actuators, robotic sensors 

A Proposal for an XOR-based Flat Routing 

Mechanism in Internet-like Topologies 

Rafael Pasquini, Fabio Luciano Verdi, Rodolfo Oliveira, 

Mauricio Ferreira Magalhaes, Annikki Welin 

In: 2010 Global Communications Conference Exhibition & 

Industry Forum - IEEE GLOBECOM 2010 

Miami-Flórida-USA Dec-2010 pp:1-6 

Abstract: A frequent subject in forums, academia and 

industry is the evolution of the Internet in terms of routing. 

Basically, the scalability in the Default Free Zone related to (1) 

the growing rate of the routing tables and (2) the convergence 

of the routing system, are pointed by routing experts as the 

main concerns of the current mechanism. Several approaches 

have emerged, but they normally require a mapping system to 

translate from identifiers to locators (IP). We contribute with 

this discussion by introducing our XOR-based Flat Routing 

mechanism for Internet-like topologies. Essentially, the 

proposed mechanism routes directly on top of flat ASes 

identifiers, eliminating the need for mapping systems. In this 

work we propose a mechanism for building the routing tables 

over the XOR-based scenario in conjunction with a reachability 

service developed using the concepts of Landmark and Bloom 

filters. The proposal is evaluated using our developed 

emulation tool under five different Internet-like topologies 

ranging from 512 to 8192 nodes 

Keywords: Flat Routing, Landmark, Bloom Filters, New 

Internet Architectures 

Adaptive Digital Processing in On-Channel 

Repeaters for Digital Television Broadcast 

Eduardo Rocha De Souza, José Matias Lemes Filho, Luis 

Geraldo Pedroso Meloni 

In: 13 International Symposium on Wireless Personal 

Multimedia Communications ISWPMC 


Recife, PE Oct-2010 pp:1-5 

Abstract: This paper shows a review on the evolution of On- 

Channel repeaters (OCR) in single-frequency-network 

broadcast. Theoretical analysis of the random positive-feedback 

channel created by OCR is presented, and a parallel to the 

Rayleigh- Channel theory is also drawn. Some analysis are 

performed on the Digital-OCR case, and equations that estimate 

the minimum SIR and minimum MER achievable for a given 

number of bits in the ADC of a Digital-OCR implementation 

are derived. These results are important when testing or in the 

project of a Digital-OCR implementation. 

Agrupamento sensível à densidade para a 

quantização de sinais de fala 

Ricardo Paranhos Velloso Violato, Fernando José Von Zuben, 

Flávio Olmos Simões, Mário Uliani Neto, Edson José Nagle, 

Fernando Oscar Runstein, Leandro de Campos Teixeira Gomes 

In: XXIX Congresso Ibero-Latino-Americano de Métodos 

Computacionais em Engenharia (CILAMCE) 

Búzios - RJ Nov-2010 pp:1-6 

Abstract: Este artigo descreve uma técnica de compressão de 

bases de dados de fala baseada em quantização vetorial, na qual 

um algoritmo de agrupamento sensível à densidade amostral é 

utilizado para construir um codebook a partir dos quadros de 

fala da base. O agrupamento é realizado por um algoritmo 

imuno-inspirado (ARIA - Adaptive Radius Immune 

Algorithm), especificamente voltado para casos em que os 

grupos apresentam densidades amostrais distintas. São também 

propostas adaptações no algoritmo visando ganho de 

desempenho. O objetivo principal do processo de quantização é 

conseguir uma alta taxa de compressão da base, com um 

mínimo de perda de qualidade perceptível. 

Keywords: Quantização vetorial, Compressão de fala, 

Síntese de fala, Algoritmo de agrupamento sensível à 

densidade, Sistemas imunológicos artificiais 

An Embedded Audio Decoder for the ISDB-T 

Vinicius José Andrade Braga, José Matias Lemes Filho, Luis 

Geraldo Pedroso Meloni 




Abstract: This paper presents an implementation of the audio 

codec High-Efficiency Advanced Audio Coding version 2 

(HEAAC v2) in an embedded system using the Blackfin Digital 

Signal Processor. Some optimization techniques are applied to 

conceive an efficient embedded implementation aiming to 

achieve requirements of real-time applications. Some 

performance analysis are also presented for comparison 

purposes to other implementations. 

Análise Comportamental de Código Malicioso 

através da Monitoração de Chamadas de 

Sistema e Tráfego de Rede 

Dario Simões Fernandes Filho, André Ricardo Abed Grégio, 

Vitor Afonso, Rafael D. C. Santos, Mario Jino, Paulo Licio De 

Geus 

In: Simpósio Brasileiro de Segurança da Informação e de 

Sistemas Computacionais (SBSeg) 

Fortaleza, CE Out-2010 pp:311-324 

Abstract: Código malicioso (malware) disseminado através da 

Internet—vírus, worms, trojans—é a maior ameaça atual à 

segurança da informação e um negócio lucrativo para 

criminosos. Há abordagens para analisar malware que 

monitoram suas ações durante a execução em ambiente 

controlado, permitindo identificar comportamentos maliciosos. 

Neste artigo, propõe-se uma ferramenta de análise 

comportamental de malware não intrusiva, a qual amplia a 

análise a exemplares que contornam as abordagens atuais e 

corrige alguns problemas presentes nestas, preenchendo assim 

uma lacuna na área. 

Attack Trees Modeling for Security Tests in Web 

Applications 

Plinio Cesar Simões Fernandes, Tânia Basso, Regina Maria De 

Moraes, Mario Jino 

In: 4th Brazilian Workshop on Systematic and Automated 

Software Testing - SAST 

Natal-RN-Brasil Nov-2010 pp:1-10 

Abstract: Security vulnerabilities in Web applications, 

when exploited by attackers, can cause large damages. 

Thus, testing this kind of applications against security 

vulnerabilities is an important activity. To help 

performing security tests, this paper brings the attack 

trees modeling to exploit three types of security 

vulnerabilities that are, nowadays, considered critical. A 

case study was performed, in which real applications are 

tested against the security vulnerabilities based on test 

cases derived from the attack trees. Results show that 

modeling using attack trees is very useful to security tests 

and can provide, many times, more effective results than 

some automatic Web vulnerabilities scanner tools can 

Keywords: Security Vulnerability, Attack Tree 

Modeling, Security Test 

Compact 2D Facial Animation Based on Context- 

Dependent Visemes 

Paula Dornhofer Paro Costa, José Mario De Martino 

In: 2nd International Symposium on Facial Analysis and 

Animation - ACM/SSPNET - ISBN: 978-1-4503-0388-0 

Edinburgh UK Oct-2010 pp:18-18 

doi: 10.1145/1924035.1924047 

Abstract: The expansion of mobile communications and the 

technological evolution of portable devices, raised new 

applications possibilities that demands the development of 

more efficient and intuitive interfaces. 

Context dependent visemes: a new approach to 

obtain realistic 2D facial animation from a 

reduced image database. 

Paula Dornhofer Paro Costa, José Mario De Martino 

In: 23th SIBGRAPI 2010 - Conference on Graphics, Patterns 

and Images 

Gramado, RS Sep-2010 pp:1-6 

Abstract: The arise of a new reality where information is 

accessed ubiquitously from a variety of different devices 

demands the development of more eficient and intuitive 

humanmachine interfaces. In this context, speech synchronized 

facial animation research aims the development of interactive 

talkingheads capable of reproducing the natural and intuitive 

faceto- face communication mechanisms. This paper describes 

a novel approach to the image-based morphing between 

visemes synthesis strategy through the use of contextdependent 

visemes capable of modeling speech coarticulation 

effects. The proposed approach was validated through the 

implementation of a videorealistic 2D speech synchronized 

facial animation system for Brazilian Portuguese based on an 

image database of just 34 photographs and integrated to a textto-speech 

(TTS) synthesizer. Speech intelligibility tests results 

show that the level of videorealism obtained by the system is 

capable of improving message comprehension when audio is 

degenerated by noise, with results similar to the obtained with a 

video of a real face. The proposed methodology can be adapted 

to deliver videorealistic animations on devices with limited 

memory and processing capacities such as mobile phones, 

PDAs (Personal Digital Assistants) or digital TV set-top boxes. 

Keywords: facial animation, image-based, 2Dmorphing, 

context-dependent visemes. 


Design of Trace-Based Split Array Caches for 

Embedded Appications 

Marina Tachibana, Alice Maria Bastos Hubinger Tokarnia 

In: 13th Conference on Digital System Design - EUROMICRO 

- ISBN: 978-1-4244-7839-2 

Lille, France Sep-2010 pp:1-7 

doi: 10.1109/DSD.2010.33 

Abstract: Since many embedded systems execute a predefined 

set of programs, tuning system components to application 

programs and data is the approach chosen by many design 

techniques to optimize performance and power consumption. In 

this paper, we propose a method based on the analysis of 

accesses to vector, arrays, and other complex data structures to 

design a size-constrained two-partition array cache. This 

method reorganizes the ways of set-associative arrays caches 

into partitions with different line sizes and defines arraypartition 

mappings so as to minimize the average memory 

access energy-delay product. Experimental results have shown 

that these split array caches have lower average energy-delay 

product for memory accesses as compared with unified setassociative 

array caches of the same size. For an MPEG-2 

decoder, even with no parallel accesses to cache partitions, the 

average memory access energy-delay product of an 8K-byte 

trace-based split array cache is reduced by 50% as compared to 

that of the unified set-associative array cache with the lowest 

energy-delay product. If 25% of the accesses occur in pairs, 

there is an additional reduction of 9%. 

Keywords: design space exploration, embedded cache 

design, embedded system design, trace-based design 

algorithm 

Expressive Audiovisual SMS Reading 

Aléx Garcia Gonçalves, José Mario De Martino 

In: 2nd International Symposium on Facial Analysis and 

Animation - ACM/SSPNET 

Edinburg UK Oct-2010 pp:16-16 

doi: 10.1145/1924035.1924045 

Abstract: Cell Phone Text Message (SMS) is a widely used 

communication service nowadays. The service is extensively 

used as a fast and efficient way for people to send daily 

communications to family members and friends, setup 

appointments, report something that has happened, comment on 

some social network topic, express feelings, etc. 

In-Packet Bloom Filter based Data Center 

Networking with Distributed OpenFlow 

Controllers 

Carlos Alberto Bráz Macapuna, Christian Rodolfo Esteve 

Rothenberg, Mauricio Ferreira Magalhaes 




Abstract: This paper discusses a novel data center architecture 

based on in-packet Bloom filters to perform Valiant load 

balanced packet forwarding enabled by two support services to 

distribute the directory and topology state of OpenFlow 

controller applications. By deploying an army of Rack 

Managers acting as OpenFlow controllers, the proposed 

architecture promises scalability, performance and faulttolerance. 

We conjecture that packet forwarding itself may 

become a cloud internal service implemented by leveraging 

cloud application best practices such as low-latency, highlyavailable, 

key-value storage systems. Moreover, we contribute 

to demystifying the argument that the centralized controller 

model of OpenFlow networks is prone to a single point of 

failure and show that direct network controllers can be 

physically distributed, yielding a ‖sweet spot between fully 

distributed and centralized networking paradigms. 

Keywords: OpenFlow, Network Centralized Control, 

Bloom Filters, Data centers 

Organização de Dados Multimídia para Busca 

Conceitual Baseada em Ontologia 

Luciano Bernardes De Paula, Rodolfo Da Silva Villaça, 


In: Simpósio Brasileiro de Sistemas Multimídia e Web – 

WebMedia 

Belo Horizonte-MG-Brasil Out-2010 pp:1-6 

Abstract: The current available large volume of multimedia 

data, semantically annotated, from several different sources, 

generates new issues about storing and retrieval of those data. 

In this scenario, it is common to use simple ontologies to 

classify data, creating a relationship between them, that 

relationship may be measured by a similarity index. The 

contribution of this paper is to propose a way to organize 

multimedia data by its conceptual classification, using LSH 

(Locality Sensitive Hashing) functions, facilitating the 

conceptual search in P2P networks. 

Keywords: Locality Sensitive Hashing (LSH), ontology, 

Peer to Peer Networks 

Piece Fingerprinting: Binding Content and Data 

Blocks Together in Peer-to-peer Networks 

Walter Wong, Mauricio Ferreira Magalhaes, Jussi 

Kangasharju 




Abstract: Peer-to-peer systems provide a scalable content 

distribution environment where each peer contributes with a 

share of resources in the distributed system. The efficiency of 

peerto- peer networks comes from the file segmentation 

procedure, allowing peers to redistribute small pieces of the 

original file as soon as they finish downloading them instead of 

waiting for the complete file download. Moreover, the 

decentralized fashion of the paradigm with multiple sources 

makes it scalable and robust under high churn. Due to the 

popularity of such systems, many attacks such as content 

pollution arose, targeting the content integrity by inserting 

bogus data in the network to increase the download time and 

bandwidth consumption. In this paper we present the piece 

fingerprinting mechanism, a new integrity verification 

procedure that algorithmically binds all pieces together and 

relates them to the complete file. Each data block resulted from 

the segmentation of a large file has a fingerprint indicating 

whether a block belongs to the content file and also allows the 

integrity verification of specific parts of the content. The 

mechanism allows the early detection and correction of the 

corrupted blocks only, reducing the download time and 

bandwidth consumption which would be spent redownloading 

larger pieces. The analytical evaluation shows that the 

fingerprinting mechanism has low overhead, usually less than 

1% of the file size, and can reduce the bandwidth consumption 

by 90% in the best case by saving the amount of bandwidth 

consumed from the re-downloaded pieces. 

Keywords: Merkle Trees, Content Networks, Peer to 

Peer Networks 

Seleção de Teste de Regressão com Dados 

Históricos 

Camila Socolowski de Almeida, Mario Jino 

In: 4th Brazilian Workshop on Systematic and Automated 

Software Testing - SAST 

Natal-RN-Brasil Nov-2010 pp:1-6 

Abstract: Regression testing is applied to ensure 

software quality across multiple versions. To minimize 

its cost, test cases with higher capability of detecting 

faults should be selected, keeping the efficiency of the 

test suite resulting from the selection. In this paper, we 

propose an approach in which historical data are used as 

a selection technique in regression testing. The approach 


feasibility and usefulness are validated through its 

application to test a real world software. 

Keywords: regression testing, test case selection 

techniques, historical data, software reliability. 

Teste Colaborativo no Software Público 

Brasileiro 

Paulo Marcos Siqueira Bueno, Miguel De Teive E Argollo 

Junior, Mario Jino, Adalberto Nobiato Crespo, Celso Aleixo 

De Barros 

In: 2010 Jornadas Iberoamericanas de Ingeniería de Software 

e Ingeniería Del Conocimento - JIISIC - ISBN: 

9786077070962 

Mérida-Yucatán-Mexico Nov-2010 pp:97-106 

Abstract: Propõe-se um modelo para o Teste Colaborativo de 

Software que busca contribuir para a eficiência e a eficácia do 

teste de software em situações em que o trabalho conjunto para 

realizar o teste ocorre em ambientes distintos. Isto torna a 

colaboração – inerente às atividades de teste – um desafio ainda 

maior. A proposta baseia-se no modelo de colaboração 3C e 

pode contribuir em iniciativas de teste de software 

desenvolvido globalmente e de teste de software de código 

aberto. Este modelo está sendo desenvolvido no contexto do 

Software Público Brasileiro. 

Keywords: Teste de Software, Engenharia de Software 

Colaborativa, Teste Colaborativo de Software, Software 

Público Brasileiro 

Towards Verifiable Parallel Content Retrieval 

Walter Wong, Mauricio Ferreira Magalhães, Jussi 

Kangasharju 

In: 6th Workshop on Secure Network Protocols - NPSec - 

ISBN: 978-1-4244-8916-9 

Kyoto - Osaka - Japan Oct-2010 

doi: 10.1109/NPSEC.2010.5634450 

Abstract: Many software vendors are providing mechanisms 

for parallel content retrieval using multiple connections, e.g., 

parallel HTTP channels, to increase the availability and 

reliability of the download procedure. At the same time, there is 

no native verification mechanism to support simultaneous 

content verification from multiple sources. While it is possible 

to set-up multiple TLS tunnels with different sources, there is 

no guarantee that the data itself is authentic since the trust is 

placed on the connection and not in the data itself. In this paper 

we present a parallel verification mechanism based on hash 

trees, allowing clients to authenticate data segments regardless 

of the container from where they were retrieved from, but just 

with the original provider. Some benefits of the proposed 

mechanism include low CPU processing costs, low verification 

overhead and possibility to support legacy data. 

Keywords: Computer Communications, Security, 

Authentication 


A Fuzzy Approach to Reactive Compensation in 

Electrical Energy Distribution Systems with 

Nonlinear Loads 

Marina B. Duque, Carlos Alberto Favarin. Murari, Fernando 

D. Penha 




Brasil Sep-2010 pp:2144- 2151 

Abstract: A fuzzy decision model to solve the problem of 

location and size of shunt capacitors for unbalanced distribution 

system with harmonic sources is presented. The problem is 

formulated as a fuzzy dynamic programming problem of the 

minimization of three-phase power loss and capacitor cost 

under the constraints of voltage limits and total voltage 

harmonic distortion per phase. So much the function objective 

as the constraints sets of the overall problem are modeled by 

fuzzy sets based on knowledge of planer about system and 

whose membership functions values are obtained from the 

results of three-phase harmonic load flow analysis. The 

harmonic load flow modeling can takes into account the skin 

effect of conductors at higher frequencies, coupling mutual 

between phases and the presence of multiple and different 

harmonic sources. 

Keywords: Capacitor placement, harmonic, unbalanced 

network, fuzzy logic decision, reactive compensation 

A Guide for Synchronous Generator Parameters 

Determination Using Dunamic Simulations 

Based on IEEE Standards 

José Luis Azcue Puma, Ernesto Ruppert Filho, Ferando 

Cardoso Fajoni 

In: XIX International Conference on Electrical Machines - 

ISBN: 978-1-4244-4174-7 

Roma, Italy Sep-2010 pp:1 - 6 

doi: 10.1109/ICELMACH.2010.5607986 

Abstract: This paper shows, through simulations using the 

software Matlab/Simulink, its library Simpowersystems and the 

standars IEEE 115-1995, IEEE 1110-2002, how to perform 

load rejection tests for salient pole synchronous generator and 

sudden short-circuit test for cylindrical rotor synchronous 

generator and how to obtain the values of the synchronous 

generator electrical operational parameters which are important 

data to perform generator and electrical power system dynamic 

studies. The paper discuss the d-axis load rejection test, the qaxis 

load rejection test, the arbitrary axis load rejection test and 

sudden short-circuit test, saturation is not considered. 

Keywords: Electrical machines, Synchronous generator 

simulation, load rejection test, parameters 

determination, short-circuit test 

Alocação Ótima de bancos de capacitores em 

redes de distribuição primária e secundária 

incluindo restrições de ressonância 

Cresencio Silvio Segura Salas, Luiz Carlos Pereira da Silva, 

Rubén Augusto Romero Lázaro 




Brasil Set-2010 pp:4007-4013 

Abstract: This article presents a methodology for 

optimization of capacitors placement in primary and secondary 

distribution systems altogether, including resonance constraints 

due to the installation of new capacitors. Resonance indices 

were used based on IEEE standards that recommend harmonic 

content limits on the point of common coupling and capacitors 

operating limits as well. In addition, the proposal considers the 

capacitors lifetime when evaluating the objective function. A 

specialized genetic algorithm was used to solve the 

optimization problem. The tests performed show how important 

it is to include a resonance analysis of the most common 

harmonic frequencies existing in a system within the problem 

constraints. 

Análise da influência da prática de eliminação de 

faltas nos principais índices de confiabilidade e 

qualidade de energia em modernos sistemas de 

distribuição 

Eline A. C. Barbosa, Fernanda C. L. Trindade, Paulo C. M. 

Meira, Walmir Freitas, André Morelato 




Brasil Sep-2010 pp:4170-4175 

Abstract: Distribution systems commonly use feeder autoreclosing 

scheme to minimize the impact of temporary faults 

and to improve the reliability in power supplying. In recent 


years, however, more and more utilities started to question this 

practice as the loads in current systems have become very 

sensitive to momentary interruptions. Auto-reclosing can create 

momentary interruptions to a large number of customers, 

yielding bad power quality consequences. As a result, some 

utilities are trying to eliminate the auto-reclosing practice. 

However, eliminating the practice implies a fundamental 

change in planning and operating a power distribution system. 

It seems that one cannot achieve simultaneous improvement on 

both power reliability and power quality using auto-reclosing. 

In view of the far-reaching impact of this issue, this work 

conducts a survey as a starting point to prepare industry to deal 

with the issue in a proactive and strategic manner. 

Keywords: Power quality, reliability, distribution 

systems, reclosers, overcurrent protection. 

Análise da necessidade de alteração dos ajustes 

dos relés de sobrecorrente de instalações 

industriais com geradores síncronos após a 

ocorrência de ilhamento 

F. Trindade, Madson Cortes De Almeida, Walmir De Freitas 

Filho 




Brasil Sep-2010 pp:2441-2446 

Abstract: With the advance of digital relays, adaptive 

protection schemes have become reality. This type of protection 

schemes can be useful in industrial systems with synchronous 

generators that operate in both modes: parallel and isolated 

(islanded). In this context, it is important to select the relays 

that must have their settings automatically changed based on 

the system operation condition. This work presents a simple 

classification approach to select the relays to be used in the 

adaptive scheme. Indeed, the approach selects the branches 

protected by overcurrent protection whose relays must be 

adaptively set. This classification is based on short-circuit 

studies. This scheme improves the selectivity and coordination 

of overcurrent protection schemes since it is not necessary to 

find a solution to meet both parallel and islanded operation. The 

proposed approach is successful applied to a real Brazilian 

industrial plant with three cogeneration units. 

Keywords: Distributed Generation, Industrial Plants, 

Adaptive Protection Scheme, Synchronous Generator. 

Análise de redes de distribuição trifásicas com 

incertezas representadas por conjuntos 

nebulosos 

Patrícia L. Cavalcante, Carlos Alberto Favarin Murari, Silvio 

S. Segura 




Brasil Set-2010 pp:2016-2023 

Abstract: The research and development of electric and 

mathematical models for the components of the electric 

networks and for the loads contribute for the computer 

simulation of the electric power systems that it happens in the 

smallest time and results in compatible values with the reality. 

This is the subject of this research that we describe in this 

article, where the main objective was the development of a 

three-phase load flow for the analysis of electric power 

distribution networks with some variables that are not 

deterministic, particularly the loads. In this sense, the imprecise 

variables were represented as fuzzy numbers (in the bell form) 

and it is presented a Specialized Three-Phase Load Flow that 

incorporates fuzzy sets and respective mathematical operations. 

The obtained results confirm the good performance of this new 

method. 

Keywords: Three-phase power flow, uncertainties, fuzzy 

numbers 

Aplicação do controlador ipfc para o 

amortecimento de oscilações eletromecânicas 

em sistemas de potência 

Danilo B. do Valle, Igor Kopcak, Vivaldo F. da Costa 




Brasil Set-2010 pp:3383-3390 

Abstract: This paper evaluates the effectiveness of the 

Interline Power Flow Controller (IPFC) for improving smallsignal 

stability of electric power systems. The IPFC power 

injection model and its differential equations are included in the 

power flow. The dynamic analysis is performed using the 

power sensitivity model. Simulations in a two area test system 

show that the IPFC equipped with a POD can provide the 

damping of the critical oscillation modes, improving the system 

dynamic performance, in addition to the flexibility to control 

the transmission lines power flows. 

Keywords: FACTS, IPFC, POD, Power Systems, Smallsignal 

Stability 

Conteúdo Harmônico da Corrente e Tensão de 

Arcos Elétricos Gerados Artificialmente em 

Ambiente Não Confinado 

Maria Cristina Dias Tavares, Jonas Lemos Talaisys, Carlos 

Medeiro Portela, Alessandra Benevides Camara 




Brasil Sep-2010 pp:1185-1192 

Abstract: In this paper the harmonic content of current and 

voltage between terminals of 543 electrical arcs artificially 

generated were obtained by applying the Windowed Fourier 

Transform. This application is based on shifting a window on 

the signs in study and calculating the coefficients of the 

Discrete Fourier Transform, allowing a time-frequency analysis 

of signals. A statistical analysis of the results has permitted the 

identification of a harmonic signature of electrical arc. 

Keywords: Secondary arc, harmonic analysis, singlephase 

autoreclosing, non-permanent faults 

Enhancement of Data Rate for User Cooperation 

Mitchell Omar Calderon Inga, Gustavo Fraidenraich 

In: IEEE/SBrT International Telecommunications Symposium 

ITS 2010-Rafael Dueire Lins(Ed.) - ISBN: 978-85-89748-05-6 

Manaus(AM) Brasil Sep-2010 pp:1 - 6 

Abstract: In this paper, we propose a different scheme based 

on user cooperation diversity, in which we obtain an increase in 

the data rate. In particular, we present performance analysis 

using conventional CDMA (code division multiple access) 

implementation for two users. Cooperation among users has 

been shown to achieve significant gains as compared to a noncooperative 

system. The results presented here show that the 

new scheme of cooperation achieves substantial increase of 

data rate, keeping the average bit error probability close to 

values obtained in [3]. Regarding the number of spreading 

codes, there are costs associated with our cooperative scheme, 

but even so our proposed strategy leads not only to an increase 

in throughput but also to a simpler system. 

Keywords: user cooperation, virtual MIMO, bit error 

probability. 

Estratégia de Controle e Análise do Filtro 

Híbrido Utilizando um Inversor de Potência 

Reduzida 

Newton Soares Da Silva, Jose Antenor Pomilio, Edson Adriano 

Vendrusculo 






Abstract: This work analyzes the compensation of harmonic 

currents through a Hybrid Filter. The Hybrid Filter consists of 

an active power filter connected in parallel with the inductor of 

a shunt passive tuned filter, resulting a lower voltage and 

current stress over the active filter. The paper investigates the 

behavior of an open loop control strategy, and discusses the 

dimensioning of the power converter. Simulation results verify 

the system operation. 

Keywords: Hybrid Power Filter, Harmonics 

Compensation, Control Modelling 

Estratégias de Controle de Conversores para 

Geração de Ozônio 

Jakson Paulo Bonaldo, Jose Antenor Pomilio 




Brasil Sep-2010 pp:3617-3624 

Abstract: This work analyzes the compensation of harmonic 

currents through a Hybrid Filter. The Hybrid Filter consists of 

an active power filter connected in parallel with the inductor of 

a shunt passive tuned filter, resulting a lower voltage and 

current stress over the active filter. The paper investigates the 

behavior of an open loop control strategy, and discusses the 

dimensioning of the power converter. Simulation results verify 

the system operation. 

Keywords: Power Electronics, Ozone Generation, Polyphase 

Systems 

Estudo do comportamento transitório da linha 

de um pouco mais de meio comprimento de 

onda submetida a manobras usuais 

Maria Cristina Dias Tavares, Ricardo Torquato Borges 




Brasil Sep-2010 pp:3917-3924 

Abstract: In this paper some electromagnetic transients results 

in a Transmission Line Greater than the Half-Wavelength are 

presented. Actual structures were used on the simulation, a 500 

kV - 2600 km line based on Brazilian North-South 

Interconnection. The studies concerns on the line energization 

maneuver, energization of the transformers at the end of the 

line and load rejection. The transients from these maneuvers 

were less severe than for lines of few hundreds of kilometers. 

Keywords: Long Distance Transmission, Half- 

Wavelength, Electromagnetic Transients. 

Estudo sobre a redução do consumo de energia 

no horário de pico via gerenciamento de 

refrigeradores 

Glauco Niro, Luiz Carlos Pereira da Silva, Rodrigo Garcia- 

Valle 




Brasil Set-2010 pp:1237-1243 

Abstract: Among the possibilities for the electrical grids of 

the future, studies about Smart Grids have been increasing. 

Smart grids will incorporate new technologies and can make 

electrical systems more efficient and reliable integrating 

consumers as active players in the electrical system operation. 

This integration, will be one of the pillars for the operation of 

this kind of grid and with implementation of digital 

measurement and communication systems, the devices will be 

able to be managed according utility and consumer’s 

convenience. In this paper will be presented a model that 

represent a refrigerator and the potential help that these devices 

can give in this new kind of grid, through the implementation 

of controls that can manage their operation. 

Keywords: Smart Grid, Load management, Refrigerator 

Genetic Algorithm Search of Absolute Photonic 

Band Gap in 2D Anisotropic Tellurium Photonic 

Crystals 

Gilliard Nardel Malheiros Silveira, Vitaly F. Rodrigues 

Esquerre, Hugo Enrique Hernandez Figueroa 



Abstract: The finite-element-method and the Genetic- 

Algorithm have been used to solve the inverse problem 

involving absolute-photonic-band-gap searching and 

maximization. Triangular lattices composed by tellurium and 

air have been analyzed. We obtained absolute midratio 

bandgaps of 23.49%. 

Geração Descentralizada de Reservas 

Operativas a Partir de Resíduos Sólidos 

Urbanos, Fontes de Energia Renovável 

Gerardo Miguel Agurto Lescano, Mariella Renata Cumpa 

Aurich, Takaaki Ohishi 

In: 2010 IEEE/PES T&D 2010 Latin America 

São Paulo, SP Nov-2010 pp:1-3 

Abstract: Os resíduos sólidos urbanos são uma fonte de 

energia renovável, disponível e alternativa com enorme 

potencial. Estes resíduos podem ser convertidos em energia por 

diversas maneiras, entre elas pela sua queima em caldeiras para 

geração de vapor e conseqüente acionamento de uma turbina. 

Os Resíduos sólidos Urbanos (RSU) podem ser utilizados como 

fonte para a geração de Reservas Operativas como 

complemento à eletricidade gerada pelas hidroelétricas em 

períodos de seca. As reservas operativas são necessárias para 

melhorar o nível de segurança operativo, principalmente em 

relação às perdas de unidades geradoras e desvios significativos 

na demanda de carga prevista. Usualmente as reservas 

operativas são alocadas levando-se em conta somente o aspecto 

econômico. Porém, outros fatores devem ser considerados tais 

como a sua localização e a sua capacidade de resposta ante uma 

variação de carga. Este trabalho analisou tecnicamente algumas 

características envolvidas no aproveitamento energético dos 

resíduos sólidos e a viabilidade de implementar pequenas 

centrais termelétricas próximas aos nós de demanda para a 

geração de Reservas Operativas. 

Gerenciamento Ótimo de Potência de um Ônibus 

Elétrico Híbrido Série para Transporte Urbano 

Juliana Lopes, Jose Antenor Pomilio, Paulo Augusto Valente 

Ferreira 





Abstract: Series Hybrid Electric Vehicles are a potential 

alternative to the fuel consumption and pollutant emissions 

reduction when used in public transport vehicles. In this vehicle 

the power sources to the electric traction system are composed 

of a battery and a unit power represented by the connection of 

an internal combustion engine and a generator. In this article, 

the power management between the sources of a Series hybrid 

electric bus for public transport is analyzed as a non linear 

optimization problem. The goal of this problem is the fuel 

consumption minimization by the engine while the bus follows 

an urban driving cycle. To this end, limits on the power 

delivered by the engine and on the battery state of charge are 

established. The problem is analyzed from the point of view of 

dynamic optimization (optimal control) with finite horizon. The 

results showed that is possible reduce the fuel consumption by 

the engine when they are compared with results obtained by 

power management strategy based on rules. 

Keywords: Series Hybrid Electric Vehicle, Power 

Management Strategy, Optimal Control. 


INFLUENCE OF ACCURATE SOIL 

REPRESENTATION FOR TRANSMISSION-LINE 

PARAMETERS: ANALYSIS BASED ON 

CARSON’S MODIFIED FORMULATIONS 

João Bosco Gertrudes, Maria Cristina Dias Tavares, Carlos 

Medeiros Portela 

In: IEEE Transmission and Distribution Latin America 2010 

Sáo Paulo, SP Nov-2010 pp:1-6 

Abstract: In this paper the influence of earth’s conductivity 

and permittivity frequency dependence are evaluated when 

calculating transversal and longitudinal transmission 

lines’parameters directly from numerical integration of 

Carson’s modified expressions. As an example of the 

importance of properly considering the frequency-dependent 

soil model, an actual 440 kV single three-phase transmissionline 

was represented, comparing the longitudinal and 

transversal parameters considering the earth’s conductivity and 

permittivity frequency dependence soil model in relation to the 

common soil representation with a constant conductivity and 

permittivity that can be neglected assuming a low frequency 

approximation. 

Keywords: Soil model, Line parameters, Frequency 

dependence, Electromagnetic transients 

Influência dos Parâmetros Transversais de uma 

Linha de Transmissão na Redução da Corrente 

de Arco Secundário durante a manobra de 

abertura monopolar 

Milton Elvis Zevallos Alcahuaman, Maria Cristina Dias 

Tavares 

In: IEEE Transmission and Distribution Latin America 2010 

São Paulo, SP Set-2010 pp:1-6 

Abstract: A successful single-pole opening/reclosure 

procedure after single-phase faults in the EHV transmission 

lines requires parameters optimization for each transmission 

system. This paper shows the influence of transmission line 

transverse parameters together with reactive shunt 

compensation parameters in the reduction of secondary arc 

current after single-pole opening procedure for non-permanents 

faults. It is proposed a method to reduce the mutual coupling 

between phases in a three-phase system representation at 

fundamental frequency. Some simulations of transient 

overvoltage for different cases with optimized neutral reactors 

were performed with the ATP program. 

Keywords: Neutral Reactor, Secondary Arc Current, 

Single-Phase Opening Maneuver, Sustained Response, 

Three-Phase ABCD Elements, Unbalanced System. 

Matriz de transformação real e constante para 

análise de linhas de transmissão com extensão 

para duas linhas trifásicas com circuito duplo 

José C. C Campos, Afonso J. Prado, Sérgio Kurokawa, Luiz F. 

Bovolato, José Pissolato Filho 





Abstract: The frequency independent real phase-mode 

transformation matrix application is analyzed for typical double 

three phase transmission lines. This transformation matrix is 

obtained from eigenvector of analyzed line considering this line 

in the ideal transposition. Determining the transformation 

matrix, it is based on Clarke’s matrix. For transposed double 

three phase transmission lines, the real phase-mode 

transformation matrix leads to diagonal impedance and 

admittance matrices in mode do-main. For untransposed cases, 

error analyses are carried out using this constant phase-mode 

transformation matrix and comparing to the results obtained 

from the eigenvectors. 

Keywords: Eigenvector, eigenvalue, frequency, 

transmission lines, Clarke’s matrix, phase-mode 

transformation 

Método baseado em lógica nebulosa para 

inserção de geração distribuída sob a óptica do 

perfil de tensão 

Leonardo A. Gomes, Carlos Alberto Favarin Murari, Ahda P. 

G. Pavani 




Brasil Set-2010 pp:2775-2782 

Abstract: This work consists of proposing a method based on 

Fuzzy Logic to obtain an index that classifies the most suitable 

buses to connect a distributed generator with an electric power 

distribution system. The method has been developed taking 

account the difficulty in keeping a suitable voltage profile in 

distribution systems, which favors large index values for the 

buses where the connection of generators results in a more 

suitable voltage profile. Another aspect included in the method 

is the minimization of the power losses. Applying a set of fuzzy 

rules, the index has been calculated through setting membership 

values to the bus voltage and load real power. One of the 

advantages of this method is the possibility to classify the 

variables into fuzzy sets that allow the linguistic translation of 

the system operator’s knowledge and consequently their 

experience of operating the system can be employed in the 

process of allocating distributed generators in the system. When 

compared to traditional techniques, our method does not require 

consecutive runs of power flows. It is necessary to obtain the 

operating state of the network through only one power flow in 

the base case. 

Keywords: Distribution networks, distributed 

generation, fuzzy logic, uncertainties, fuzzy numbers 

Método prático para a avaliação do impacto da 

partida direta de motores de indução no 

afundamento de tensão 

Cecília F. Morais, Diogo Salles, Paulo C. M. Meira, Ahda P. 

G. Pavani, Walmir Freitas, Wilsun Xu 




Brasil Set-2010 pp:2768-2774 

Abstract: The impact of motor starting on power quality can 

be assessed using numerous and complex computer dynamic 

simulation studies. However, utility engineers have become 

more interested in practical techniques that enable fast and 

reliable assessment of new motor installation proposals, so that 

studies of several cases can be conducted. In this context, the 

objective of this paper is to present a graphical method that 

consists of simple analytical formulas to determine the 

maximum motor size that can be connected to a particular 

distribution system without exceeding the acceptable values of 

voltage sags established by the utility grid. Basically, the 

proposed method provides a curve relating, for a particular 

voltage sag permissible limit, the distribution system shortcircuit 

level to the maximum induction motor size that can be 

installed. Additionally, it is possible to determine, through a 

sensitivity analysis, the influence of power grid and motor 

parameters on the behavior of these curves. The results have 

proven to be accurate when compared to those obtained by 

repeated electromagnetic transient simulations. 

Keywords: Induction motor, motor starting, power 

quality, voltage sags 


Métodos de Pontos Interiores Aplicados ao 

problema de Pré-Despacho com Manobras 

Programadas 

Silvia Maria Simões de Carvalho, Aurelio Ribeiro Leite de 

Oliveira, Christiano Lyra Filho 





Abstract: In this work, the primal-dual interior point methods 

are used to minimize the DC predispatch generation and 

transmission costs and loss on hydroeletric power systems. The 

model considers the network topology modification 

schedulling. A matrix structure study is also performed 

considering the changes that occurs in the system. We stress 

that the computational effort to solve a problem with network 

topology modification is close to the effort for solving the 

problem without it. Computer results with IEEE test and real 

Brazilians sytems reinforce this statement. A new network 

topology modification simulation of maneuvers through 

transmission lines bound reduction is presented. The new 

approach is compared with the explicit toppology modification 

version. 

Keywords: Interior Point Methods, Predispatch, 

Hydroeletric Systems. 

Modelagem do Interline Power Flow Controller 

(IPFC) no Fluxo de Carga e Análise de 

Carregamento do Sistema 

Do Valle, D. B., Igor Kopcak, Vivaldo Fernando Da Costa 

In: III Simpósio Brasileiro de Sistemas Elétricos 

Belém, PA Set-2010 pp:1-6 

Abstract: O interline power flow controller (IPFC) é a última 

geração dos flexible AC transmission systems (FACTS) que se 

destina ao controle e gerenciamento dos fluxos de potência em 

múltiplas linhas de transmissão numa dada subestação. O 

presente artigo apresenta a inclusão deste dispositivo no fluxo 

de carga baseado no método convencional de Newton-Raphson. 

O modelo de injeção de potência do IPFC é utilizado por 

facilitar sua incorporação em programas de fluxo de carga e 

fluxo de carga ótimo. Análises de simulações demonstram que 

o IPFC pode ser utilizado para resolver problemas complexos 

de congestionamentos de fluxos de potência, eliminando 

sobrecargas em linhas de transmissão. Entretanto, em situações 

particulares o modo de controle de fluxo de potência constante 

do IPFC pode diminuir a margem de estabilidade de tensão do 

sistema. 

Keywords: Flexible AC Transmission Systems (FACTS), 

Fluxo de Carga, Gerenciamento de Congestionamento, 

Interline Power Flow Controller (IPFC), Sistemas de 

Potência. 

Modulação por Acionamento Rotativo Aplicado a 

Inversor Cascata Simétrica 

Ernesto Kenji Luna, Jose Antenor Pomilio 





Abstract: This paper proposes a modulation strategy with the 

aim of reducing the commutation frequency in a symmetrical 

cascaded multilevel inverter in comparison with traditional 

modulation techniques, additionally resulting an uniform 

distribution of the commutations, better than in the Phase Shift 

modulation. Such improvements allow to increase the converter 

power, due to the lower switching devices stress. 

Keywords: Multilevel, Modulation Techniques, 

Symmetrical Cascaded Multicell Inverter and Pulse 

Width Modulation 

Newave versus Odin Comparação entre Modelo 

Estocástico e Determinístico no Planejamento 

da Operação Energética do Sistema interligado 

Nacional 

Monica de Souza Zambelli, André Emilio Toscano, Secundino 

Soares Filho, Erinaldo Farias Dos Santos, Luis Noguera 





Abstract: This paper presents a comparison between the 

NEWAVE model, which employs a stochastic approach by 

using Stochastic Dual Dynamic Programming (SDDP), and the 

ODIN model (Optimization of Brazilian Interconnected 

Hydrothermal Power System), which uses a deterministic 

approach with a network flow optimization algorithm. The 

ODIN model uses deterministic and nonlinear optimization 

with forecasted inflows, with detailed representation of the 

hydroelectric system by individual plants. The NEWAVE 

model uses an equivalent composite representation of 

interconnected subsystems. In order to perform a comparison 

on the same terms, the SUISHI-O model was used to 

decompose the strategy of the NEWAVE model into 

individualized plants. The ODIN model was compared to the 

NEWAVE SUISHI-O methodology for a case study based on 

data from the deck of CCEE for the PMO of September 2008, 

regarding the generation capacity expansion plan for December 

2012. The results was obtained by simulation of 70 historical 

scenarios, indicating a significantly superior performance by 

the ODIN model, which leads to a more security and economic 

operation of SIN by more efficient use of water resources. 

Keywords: Energy Systems Planning, nonlinear 

optimization, stochastic optimization, reservoir 

operation, NEWAVE model, ODIN model. 

O uso de quadripolos trifásicos na obtenção da 

resposta sustentada de um sistema elétrico 

desequilibrado 

Milton E. Zevallos, Maria C. Tavares 




Brasil Set-2010 pp:1901-1908 

Abstract: This paper proposes the use of three-phase twoports 

elements to obtain the sustained response of unbalanced 

electric power system. Representations of three-phase two-ports 

networks for various types of elements of the electrical power 

system are described. The methodology is applied to identify 

the optimum neutral reactor that minimizes the secondary arc 

current in a transmission system, thus enabling the single-phase 

open/reclose maneuver implementation. 

Keywords: Cascade Association, Sustained Response, 

Three-Phase ABCD Elements, Unbalanced System 

Otimização do Despacho Integrado da Geração 

Termoelétrica da produção e Transporte de Gás 

Natural 

Elma Pereira Santos, Takaaki Ohishi, Oderson Dias de Mello 





Abstract: Natural gas is a fossil fuel that can be used for 

electricity generation in thermoelectric power plants. Thus, the 

operation of natural gas supply system is affected by the 

dispatch of thermoelectric power plants, and operational 

constraints in the gas supply system may also affect 

thermoelectric plants dispatch. This operational dependence 

between these two systems requires a coordinated operation 

with the aim of obtaining a more effcient operation. This paper 


presents a model of economic dispatch applied to 

thermoelectric power plant and gas supply system considering 

the costs of production and transmission of the natural gas and 

the costs of electricity generation. The problem is modeled as a 

nonlinear mixed problem. For resolution was used a hybrid 

approach that combines a model based on Linear Programming 

and a Nonlinear Optimization techniques. 

Keywords: Natural Gas, Method, Newton - Raphson, 

Steam power-plants, Thermoelectricity. 

Parâmetros discretos e distribuidos para o 

estudo de transitórios eletromagnéticos 

Eduardo C. M. Costa, José Pissolato, Sérgio Kurokawa, José 

A. Prado, Luiz F. Bovolato 




Brasil Set-2010 pp:3911-3916 

Abstract: The present paper proposes a study in state of art for 

two principal representations applied to simulate 

electromagnetic transients in transmission lines: by lumped 

parameters and distributed parameters. In first representation, 

the distributed nature of longitudinal electric parameters are 

represented by cascade of _ nominal elements and the current 

and voltage transients are obtained at any point of the line, 

directly in time domain, from a system composed by first order 

differential equations easily solved by numerical or analytic 

integration methods. The second representation is described 

based on distributed electric parameters of the line, in 

frequency-domain, and the current and voltage transients are 

calculated in time domain from inverse transform of line 

hyperbolic functions. Both procedures present advantages and 

restrictions which are discussed qualitatively and quantitatively 

by present paper, based on reference bibliography and on 

transients evaluated in frequency and time domain. 

Keywords: Transmission lines, electromagnetic 

transients, lumped parameters, distributed parameters 

Um procedimento para estimção de parâmetros 

de linhas de transmissão baseado na teoria de 

decomposição modal 

Gislaine A. Asti, Sérgio Kurokawa, Afonso J. Prado, Luiz F. 

Bovolato, José Pissolato 





Abstract: The objective of this paper is to show a 

methodology to estimate transmission line parameters. The 

method is based on the modal decomposition theory and it is 

developed starting from currents and voltages measured at the 

sending end and receiving end of the line. The procedure has 

been used in a 440 kV three-phase line with 100 km. The 

results show that the precision of the method depends of the 

characteristics of the load that is connected at the receiving end 

of the line. 

Keywords: Electromagnetic transients, frequency 

dependence, modal transformation, phase domain, 

transmission line, transmission-line parameters 

Uma Nova Abordagem utilizando Métodos de 

Pontos Interiores com Relaxação Baseada em 

Barreira Logarítmica Modificada 

Mayk Vieira Coelho, Anésio dos Santos Jr., Aurélio Ribeiro 

Leite de Oliveira 





Abstract: O método de barreira logarítmica modificada é 

combinado com os métodos de pontos interiores para solução 

do fluxo de potência ótimo CC de um sistema de potência 

hidrotérmico. O uso de barreira logarítmica modificada 

aumenta a região factível do problema, podendo fazer com que 

as variáveis assumam valores de fronteira sem que haja 

problemas numéricos, como ocorre nos métodos tradicionais de 

pontos interiores. Esta combinação de métodos traz uma 

mudança no parâmetro de pertubação do método de pontos 

interiores, deixando de ser um escalar e se tornando um vetor, 

mudando também sua forma de atualização. Além disto, as 

direções obtidas atravéz do método de Newton se tornam mais 

eficientes, contruindo um novo percurso, muitas vezes mais 

curto que o tradicional. A estrutura matricial resultante é 

estudada e estudos de caso são feitos utilizando sistemas 

elétricos IEEE. 

Keywords: Fluxo de Potência Ótimo, Métodos de 

Pontos Interiores, Barreira Logarítmica Modificada 

Uma representação no espaço de estado e no 

domínio do tempo para linhas de transmissão 

trifásicas: estudo dos transitórios 

eletromagnéticos 

Sérgio Kurokawa, Luiz F. Bovolato, Afonso J. Prado, Eduardo 

C. M. Costa, José Pissolato 





Abstract: The current paper describes a representation of 

three-phase transmission lines by state equations in time 

domain. The proposed modeling takes into account the 

frequency-dependency of line longitudinal parameters. The 

function that describes the behavior of line electric parameters 

is synthesized from a rational function F(_) and then inserted in 

lumped parameters representation by Vector Fitting. The 

currents and voltages through the transmission line are 

represented by a nonhomogeneous system of first-order 

differential equations, presented as state equations. In threephase 

representation, all procedures are performed in modal 

domain and afterwards modal values are converted to phase 

domain using a modal transformation matrix. The state 

equations are solved by numerical integration methods and the 

results are compared to results obtained by Microtran (EMTP). 

The proposed line representation is applied to simulate 

electromagnetic transients from switching operation in a 440 

kV three-phase line. 

Keywords: Transmission lines, electromagnetic 

transients, state space, time domain. 

Utilização da Morfologia Matemática na 

Localização de Faltas em Sistemas de 

Transmissão de Energia Elétrica 

Madson Cortes de Almeida, F. Trindade, F, F. Costa, Paulo 

Anderson Holanda Cavalcante 





Abstract: Este trabalho apresenta uma série de estudos sobre a 

aplicação da morfologia matemática no problema de 

localização de falhas em sistemas de energia elétrica. Essa 

ferramenta foi incluída como parte da técnica de localização de 

faltas. Para verificar a robustez da ferramenta, quatro 

parâmetros foram variados: a taxa de amostragem dos sinais, a 

resistência de falta, o ângulo de incidência da falta e o tamanho 

do elemento estruturante dos tipos de filtros morfológicos 

avaliados. As simulações foram conduzidas considerando faltas 

fase-terra. Os resultados mostram que os filtros morfológicos 

são suficientemente robustos para aplicação no problema de 

localização de falhas. Adicionalmente, esses filtros são capazes 

de mostrar a polaridade das frentes de onda, o que pode 

contribuir no processo de localização de faltas. 


Keywords: Localização de faltas, morfologia 

matemática, sistemas de energia elétrica. 


112 Gb/s Co-DP-QPSK Optical Transmission 

Offline Digital Filtering Analysis 

Júlio César Medeiros Diniz, Vitor Bedotti Ribeiro, Júlio César 

Rodrigues F. De Oliveira, Adolfo Fernandes Herbster, D.M. 

Pataca, Aldario Chrestani Bordonalli 





Abstract: In this article, a set of digital filtering algorithms for 

application in coherent optical transmission based on 

dualpolarization quadrature phase-shift keying modulation 

scheme is presented. By considering degradation effects in 

optical fibers, digital filtering algorithms were developed and 

evaluated to provide adequate recovery of transmitted data via 

off-line processing. Consequently, phase estimation was 

possible in electrical domain since chromatic dispersion and 

polarization mode dispersion had previously been compensated 

by the algorithms, allowing for long-haul optical transmissions 

consisted of high-order modulation formats (2b/s/Hz of spectral 

efficiency) with coherent detection. 

Keywords: Coherent detection, high speed optical 

systems, polarization multiplexing, digital filtering 

A Turbo Multiuser Detector Based on Samples 

Reliability 

Luís Otávio Mataveli, Celso de Almeida 




Abstract: A turbo multiuser detector based on the reliability 

of the samples is proposed. Reliability thresholds are used to 

classify a sample as reliable or not. The complexity decreases 

each time a sample is classified as reliable. The proposed 

detector can reach similar performance, when compared to the 

turbo multiuser detector, but with smaller complexity. 

Performance is evaluated in terms of bit error rate and 

complexity obtained by simulation, as a function of signal to 

noise ratio and the reliability threshold. We present the 

performance results by different processing gain. Consequently 

the results can be applied to CDMA and OFDMA systems. 

Keywords: Turbo Multiuser Detection, Samples 

Reliability, CDMA, OFDMA. 

An Adequate Objective Performance Evaluation 

of Dirac Video Codec Compared to H.264/AVC 

André Filgueiras de Araujo, Yuzo Iano, Rangel Arthur 



Manaus(AM) Brasil Sep-2010 

Abstract: Dirac, a relevant new open wavelet-based video 

codec, has been released recently. The main contribution of this 

paper is an adequate performance evaluation of this codec 

compared to the well-known H.264/AVC. This work differs 

significantly from previous ones which present unfair and 

inconclusive comparisons. Eight videos comprising three 

different resolutions with various degrees and kinds of motion 

are used to perform the simulations, as well as appropriate 

tuning of coding parameters for both codecs. In every case, 

H.264’s objective visual quality results outperform Dirac ones, 

but some evidences indicate Dirac might provide better 

subjective quality. 

Keywords: Dirac video codec, H.264, Video Coding, 

Vide Compression, Wavelet-based video coding. 

An Artificial Immune System for Optical Fiber 

Based Directional Couplers 

Multiplexer/Demultiplexers Design 

Carlos Henrique da Silva Santos, Vitaly F. Rodrigues, Hugo 




Abstract: The design of optical-fiber directional couplers 

based multiplexers/demultiplexers by using the artificial 

immune system for wavelength division multiplexing 

applications is presented and validated by the beam propagation 

method. 

Análise da Aberração Cromática em Lentes 

Metálicas Dielétricas 

V. F. Rodríguez-Esquerre, Davi Franco Rêgo, Cosme E. Rubio- 

Mercedes, Hugo Enrique Hernández-Figueroa 




Vitoria - ES - Brasil Set-2010 

Abstract: Lentes metálicas dielétricas permitem a focalização 

em subcomprimento de onda na faixa da luz visível ao 

infravermelho próximo. A aberração cromática dessas lentes de 

nanofendas é analisada detalhadamente utilizando o método dos 

elementos finitos (MEF) e camadas perfeitamente casadas 

(PML, Perfecly Matched Layers). 

Keywords: lentes, nanoplasmônica, óptica integrada. 

Analysing network-wide anomalies using 

dependency graphs and baseline 

Alexandre De Aguiar Amaral, Bruno Bogaz Zarpelão, 

Leonardo De Souza Mendes, Mario Lemes Proença Junior, 

Joel José Puga Coelho Rodrigues 

In: 18th International Conference on Software, 

Telecommunications and Computer Networks (SoftCOM), 2010 

- ISBN: 978-1-4244-8663-2 

Split-Bol - Island of Brac--Croatia Sep-2010 pp:310-314 

Abstract: In this paper, it is presented a solution that performs 

the alarm correlation based in the dependencies between the 

network devices using baseline or digital signature of network 

segment (DSNS). The main objective of this work is to provide 

a network-wide view, showing its global status instead of just 

presenting the various alarms generated individually for 

different network elements. A dependency graph is used in 

order to correlate these alarms, increasing the semantic content 

of resulting notifications. Besides, we also present a visual 

approach for the network administrator, which reflects the 

network global status, enabling network administrators to 

visualize the anomaly propagation in the network. Tests were 

performed in the State University of Londrina network and the 

results of the experiments have been widely satisfactory. 

Keywords: State University of Londrina network, alarm 

correlation, baseline signature, dependency graphs, 

digital signature, network segment, network-wide 

anomalies 

Aperfeiçoamento dos recursos do Programa 

aplicativo MatVox como ferramenta de suporte 

ao Sistema Dosvox 

Henrique Da Mota Silveira, Luiz Cesar Martini 

In: XIII Encontro Nacional de Usuários de DOSVOX 

Cascavel, PR Out-2010 pp:1-4 

Abstract: Este trabalho sugere o software MATVOX como 

uma alternativa à falta de recursos voltados para deficientes 

visuais, direcionada para as áreas de ciências exatas. 

Basicamente, o MATVOX é uma calculadora programável que 

faz uso do editor de texto EDIVOX do sistema gratuito 

DOSVOX, que é uma plataforma de apoio ao deficiente visual 

composta principalmente por um Sistema Operacional que 

contém os elementos de interface e síntese de fala para a língua 


Portuguesa; Editor, leitor e impressor/formatador de textos; 

Impressor/formatador para Braille; Aplicações de uso geral 

como: caderno de contatos, agenda, calculadora, jogos, 

utilitários de Internet (FTP, navegador, email); Programas 

multimídia; Ampliador de tela para pessoas com visão reduzida 

e leitor de janelas para o sistema operacional Windows. A 

calculadora foi desenvolvida de tal forma que permite ao 

usuário criar algoritmos e cálculos matemáticos. O MATVOX 

foi criado no ano de 2010 e este trabalho é uma síntese do 

referencial teórico acerca do MATVOX, envolvendo 

considerações de aperfeiçoamento e validação da ferramenta. 

Application of Security Metrics in a Metropolitan 

Network: A Case Study 

Bruno Bogaz Zarpelão, Leonardo De Souza Mendes, Rodrigo 

Sanches Miani 



Manaus(AM) Brasil Sep-2010 pp:1-6 

Abstract: The information security issues in the current 

communication networks demand the development of efficient 

methods to find security vulnerabilities and facilitate the 

decision making process. Security metric is a widely used 

concept in this area. The metrics can indicate the actual level of 

a specific security target and may determine the actions that 

should be taken. This work presents a case study about the 

security metrics implementation in the Open Access MAN 

(Metropolitan Area Network) of Pedreira, a city located on 

southeast of Brazil. The paper also presents a methodology for 

data gathering and analysis to support the security metrics 

implementation, the security metrics that were used in the case 

study, the metrics program results and some discussions about 

the benefits and disadvantages of the security metrics usage. 

Keywords: Communication systems, Computer network 

management, Computer network security, Security 

metrics, Open access metropolitan area network 

Blind Extraction of the Sparsest Component. 

Everton Zaccaria Nadalin, André Kazuo Takahata, Leonardo 

Tomazeli Duarte, Ricardo Suyama, Romis Ribeiro De Faissol 

Attux 

In: 2010 Ninth International Conference on latent Variable 

Analysis and Signal Separation - LVA/ICA 

Aussois - France Sep-2010 pp:394-401 

Abstract: In this work, we present a discussion concerning 

some fundamental aspects of sparse component analysis (SCA), 

a methodology that has been increasingly employed to solve 

some challenging signal processing problems. In particular, we 

present some insights into the use of L1 norm as a quantifier of 

sparseness and its application as a cost function to solve the 

blind source separation (BSS) problem. We also provide results 

on experiments in which source extraction was successfully 

made when we performed a search for sparse components in the 

mixtures of sparse signals. Finally, we make an analysis of the 

behavior of this approach on scenarios in which the source 

signals are not sparse. 

Keywords: Blind Source Extraction, Source Separation, 

Sparse Component Analysis 

Blind Source Separation in Polarization Division 

Multiplexed Optical Systems 

Eduardo Rosa, Everton Nadalin, Ricardo Suyama, João 

Romano 




Abstract: Polarization division multiplexing systems is a 

promising technique, able to double the capacity of next 

generation optical communication systems. However, the most 

common employed algorithms to recover the sources from the 

received data have the drawback of losing sources when 

polarization dependent loss is present. To tackle this problem, 

we propose different approaches based on independent 

component analysis algorithms. 

Keywords: Polarization division multiplexed optical 

systems, blind source separation, independent component 

analysis 

Capacity Issues for Cognitive Radio Systems 

Heloisa Pimentel, Paulo Cardieri 




Abstract: The development of software radio toward the 

cognitive radio brought the hope that the spectrum scarcity 

would be finally an issue of the past. Due to the characteristics 

of the cognitive operation and environment (including spectrum 

sharing), the operation of such a system has to take into account 

the interference to and from other wireless systems. 

Interference exploited via cognition could also improve spectral 

utilization and end-to-end performance, and the interference 

channel model could provide a good choice when evaluating 

these systems. However, the determination of the capacity 

region for the interference channel has been an open problem 

for more than 30 years, showing that the fundamental questions 

about networks and interference is not well understood until 

now. In spite of that, some researchers have already presented 

capacity analysis for cognitive radio systems under certain 

conditions. 

This paper presents a survey of some works done in order to 

evaluate the capacity of cognitive radio systems, even if these 

have to be restricted by certain particularities. 

Keywords: cognitive radio, capacity, interference, 

wireless communication, multiple user, spectrum sharing 

Capacity of CSMA under Nakagami Fading 

Elvio João Leonardo, Michel Daoud Yacoub 



Manaus(AM) Brasil Sep-2010 pp:1 - 5 

Abstract: This paper investigates the throughput performance 

of carrier sense multiple access (CSMA) in a packet radio 

network and Nakagami fading environment. The approach 

considered includes the signal capture model with incoherent 

addition of interfering signals. The cases of uniform attenuation 

for all terminals (or perfect power control) as well as unequal 

average power levels are studied. Analytical and numerical 

results are presented. 

Keywords: Wireless communication, CSMA, Nakagami 

fading. 

Caracterização de um Conversor de 

Comprimento de Onda Baseado em Efeitos Não- 

Lineares de SOAs 

Eduardo Cavalcanti Magalhães, Napoleão Dos Santos Ribeiro, 

Evandro Conforti, Aldario Chrestani Bordonalli 





Abstract: Apresentam-se os resultados relativos à 

caracterização experimental de um conversor de comprimento 

de onda com um amplificador óptico a semicondutor operando 

através das propriedades de mistura de quatro ondas agregadas 

à modulação cruzada de ganho. Diagramas de olho e fatores de 

qualidade Q foram obtidos para taxas de transmissão de 2 e 7 

Gbps, considerando condições iniciais distintas para a diferença 

entre os comprimentos de onda dos canais envolvidos no 

processo. Em destaque, a conversão foi observada para 

situações de até 22 nm de diferença entre os comprimentos de 

onda em down-conversion e um fator Q em torno de um valor 

médio de cerca de 15 em uma faixa de 16 nm de up-conversion. 


Keywords: amplificador óptico a semicondutor (SOA), 

conversão em comprimentos de onda, mistura de quatro 

ondas, modulação cruzada de ganho. 

Development of a Business Intelligence 

Environment for e-Gov using Open Source 

Technologies 

Eduardo Zanoni Marques, Leonardo De Souza Mendes, 

Everton Luiz De Almeida Gago Junior, Rodrigo Sanches Miani 

In: International Conference on Data Warehousing and 

Knowledge Discovery 2010 (DaWaK) - ISBN: 3-642-15104-3 

978-3-642-15104-0 

Bilbao, Spain Sep-2010 pp:1-6 

Abstract: It has become common for modern organizations to 

use advanced information systems for helping their daily 

operational task. However, there is still a large demand for 

software solutions that enable straightforward data analysis 

from these systems. Aiming to solve this problem, Business 

Intelligence (BI) environments were created. Electronic 

Government (e-Gov) systems, which typically work with 

governmental operational data, can take great benefits from a 

BI environment. Therefore, in e-Gov systems BI tools can be 

used, among others, to pursue the following goals: enhance the 

relationship between city and state government and the citizen; 

help administrating public resources; monitor the impacts of 

public policies upon the society. This paper presents a proposal 

for creating a BI environment for Electronic Government 

systems, using open source technologies with a special 

application to Social Welfare, developed for the city of 

Campinas, SP, Brazil. 

Digital Filtering Algorithms for 112 Gb/s Dual 

Polarization QPSK optical systems with coherent 

detection 

Vitor Bedotti Ribeiro, Júlio César Medeiros Diniz, Júlio César 

Rodrigues F. De Oliveira, Adolfo Fernandes Herbster, Aldario 

Chrestani Bordonalli 


Recife, PE Sep-2010 pp:1-6 

Abstract: In this work we implemented and evaluated a set of 

algorithms for digital filtering purposes applied to the next 

generation of optical systems based on high order modulation 

formats, coherent detection and digital signal processing. These 

algorithms were capable of enabling optical transmission at 112 

Gb/s bit rate using dual polarization and quadrature phase shift 

keying at the transmitter and the coherent receiver. 

Keywords: receptor coerente, sistema WDM, algoritmos 

rastreadores, processamento digital de sinais 

Digital Polarization Tracking Algorithms for 

100Gb/s Coherent DP-QPSK Transmission 

Vitor Bedotti Ribeiro, Júlio César Rodrigues F. De Oliveira, 

Júlio César Medeiros Diniz, Adolfo Fernandes Herbster, D.M. 

Pataca, Aldario Chrestani Bordonalli 




Vila Velha-ES-Brasil Sep-2010 pp:725-730 

Abstract: In view of optical systems with transmitters 

operating in quadrature phase-shift keying and using two 

orthogonal polarizations (DP-QPSK), as well as coherent (Co) 

detection receivers with offline digital signal processing (DSP), 

this work analyzes important digital filtering schemes based on 

non-data aided constant modulus algorithms (CMA) for 

polarization tracking and linear effects mitigation with and 

without differential phase compensation and forward linear 

prediction. Simulation results for a Co-DP-QPSK 112-Gb/s link 

revealed that the algorithm with taps and differential phase 

compensation presented better performance than those of other 

standard algorithms. 

Keywords: Optical fiber communication, Constant 

modulus algorithm, Polarization tracking, Digital signal 

processing 

Dynamic gain spectrum equalizer for EDFAs in 

reconfigurable optical networks 

Vitor Vale Do Nascimento, Júlio César Rodrigues F. De 

Oliveira, Vitor Bedotti Ribeiro, Aldario Chrestani Bordonalli 

In: Congresso Internacional Frontiers in Optics/Laser Science 

Conference of Optical Society of America 

San Jose-CA -USA Oct-2010 pp:1-6 

Abstract: In this work, an analysis and an experimental 

demonstration of a dynamic gain equalizer (DGE) for EDFAs 

in reconfigurable optical networks were presented. For a 32channel 

WDM system with one EDFA and different amplifier 

gain scenarios, experimental results showed that the DGE 

allowed for a power imbalance reduction of 86%, minimizing 

EDFA wavelength-gain dependency. The impact of DGEs in an 

EDFA cascade was analyzed in terms of simulations. For that, a 

32-channels optical link formed by ten 80-km standard optical 

fiber spans with one automatic gain controlled EDFA for each 

span was assumed. The best OSNR results indicate that power 

imbalance can be reduced from 22.1 dB without DGE to around 

1.5 dB when DGEs are placed after each EDFA of the cascade. 

Keywords: sistema WDM, amplificadores`fibra dopada 

com érbio, filtragem óptica. 

Electromagnetic Interference Simulation of a Cell 

Phone in an Aircraft System Using Domain 

Decomposition Method 

Juliano Mologni, Marco Antonio Robert Alves, Mateus 

Bonadiman, Leandro Percebon, Filipe Baumgratz, Edson 

Fonseca, Cesareo de La Rosa Siqueira 




Abstract: Laboratorial experiments to investigate the behavior 

of numerous embedded avionics installations to onboard 

electromagnetic interference (EMI) are extremely complex and 

costly. Even if all electronic subsystems in an aircraft are 

validated under the electromagnetic compatibility (EMC) 

standards, the integration between them can create numerous 

points of potential hazards that affects the total electromagnetic 

behavior of the entire system, hazards that can be detected only 

when the first complete aircraft prototype is available, and 

whose resolution at this phase of the development process is 

very time consuming and expensive. Numerical techniques 

such as the finite element method (FEM) present a reliable 

solution to analyze EMI responses enabling additional analysis 

of any portable electronic device without impact the in-service 

aircraft schedules. FEM technique requires a considerable 

computational resource to solve large field problems, and in 

order to create a reliable model of an aircraft interior, a new 

procedure called domain decomposition method (DDM) was 

used taking advantage of parallel processing. In order to 

address the concern for cellular phone EMI to an aircraft 

monopole antenna and a wiring harness, a full numerical 

methodology was developed including actual diagnostic 

signals. The study presents complete results regarding EMI and 

communication channel analysis addressing the potential 

hazards of a cell phone in an aircraft’s electronic system. 

Keywords: Domain Decomposition Method (DDM), 

Electromagnetic coupling, Electromagnetic Interference 

(EMI), Electromagnetic Compatibility (EMC), Finite 

Element Method (FEM), Electromagnetic radiation 

effects. 


Empirical characterization of wavelength 

conversion for phase modulated channels based 

on SOA-FWM properties 

Eduardo Cavalcanti Magalhães, Evandro Conforti, Aldario 



Recife, PE Sep-2010 pp:1-6 

Abstract: In this work, experimental results of an empirical 

characterization of wavelength conversion of 10-GHz phase 

modulated signals based on SOA nonlinear effects, specifically 

the FWM, were presented. The wavelength converter based on 

FWM presented a range of 8 nm conversion (4 nm in upconversion 

and 4 nm in down-conversion) but was sensitive to 

light polarization, with a variation of 6 dB between the worst 

and best case analyzed. Future work will evaluate the ability of 

FWM conversion when subjected to systems that use digital 

modulation in different formats and transmission rates. 

Keywords: conversão em comprimento de onda, 

amplificadores ópticos semicondutores, mistura de 

quatro ondas. 

Evaluation of the Effects of Co-Channel 

Interference on the Bit Error Rate for QPSK and 

M-QAM Modulations 

Edgar Eduardo Benitez Olivo, Gina Andrea Quelal Quelal, 

Diana Pamela Moya Osorio, Carlos Daniel Altamirano 

Carrillo, Celso De Almeida 




Abstract: In this paper, a performance analysis for QPSK, 16- 

QAM and 64-QAM, modulations in the presence of co-channel 

interference is made. At first, an expression of the bit error rate 

(BER) for M-PAM as a function of the Eb=N0 ratio in the 

presence of K interferers is obtained. The formula from the 

BER gotten earlier is used to derive a simplified expression for 

the BER of M-QAM modulations. For each modulation 

scheme, it is shown that there is a minimum signal to 

interference ratio (SIR) for the system does not present a BER 

floor. The results obtained show that modulations with higher 

order alphabets need high SIR in order to maintain the BER at 

satisfactory levels. This analysis can be applied in the 

performance evaluation of cellular radio networks, as WiMAX 

and LTE. 

Keywords: M-PAM, Q-PSK, M-QAM, Co-Channel 

Interference, SIR, BER. 

Evaluation of the Effects of the Co-Channel 

Interference on the Bit Error Rate of Cellular 

Systems for BPSK Modulation 

Carlos Daniel Altamirano Carrillo, Celso De Almeida 



Manaus(AM) Brasil Set-2010 pp:1-6 

Abstract: A performance analysis in terms of the bit error rate 

for digital systems with co-channel interference is done. In 

order to evaluate the effects of the interference on systems 

performance, expressions for the bit error rate are obtained for 

different scenarios. In these scenarios we consider one, two or 

K interferers that have the same power. If K is large, the 

interference is gaussian and the interference can be treated as 

equivalent noise. Scenarios with two interferers, where one of 

them is dominant and where the interference is asynchronous to 

the signal are also considered. Although the gaussian 

approximation is easy to be obtained, it is considered not a 

good model for cellular networks, because the number of main 

interferers is in essence one or two. This paper presents an 

effective tool to evaluate how much effective are the diverse 

schemes proposed to mitigate the co-channel interference in 

cellular networks. 

Keywords: 2-PAM, BPSK, Co-Channel Interference, 

SIR, BER 

Linear Quadratic Regulator for a Class of 

Markovian Jump Systems with Control in Jumps 

Alessandro N. Vargas, João Y. Ishihara, João Bosco Ribeiro do 

Val 


Atlanta, GA- USA Dec-2010 pp:2910-2917 

Abstract: This paper presents a suboptimal control strategy 

for the linear quadratic regulator problem of Markov jump 

linear systems subject to control in jumps. The system under 

study has a dual switching structure, in a manner that the 

system parameters jump according to both a Markov chain and 

a given switching control rule. The suboptimal control policy, 

derived via dynamic programming argument, relies on a special 

set of positive semidefinite matrices, in the sense that the 

number of elements of this set increases via a combinatorial 

step-by-step argument, applied at each time stage. An example 

is presented to illustrate the result. 

Keywords: Stochastic optimal control, Switched systems, 

Markov processes 

Low Complexity Multiuser Detection based on 

Reliable Samples 

Celso Iwata Frison, Celso de Almeida 

In: 11th IEEE International Symposium on Spread Spectrum 

Techniques and Applications - ISSSTA2010 - ISBN: 978-1- 

4244-6013-7 

Taichung, Taywan Oct-2010 pp:1-6 

doi: 10.1109/ISSSTA.2010.5651348 

Abstract: A sub-optimum multiuser detector which compares 

the received samples to reliability thresholds, in order to 

classify them as reliable or non-reliable, is proposed for CDMA 

systems. Each one of these classified samples receives a 

different management in the detection process. This technique 

presents a good trade-off between performance and complexity 

in relation to the optimum multiuser detector. In fact, for some 

values of the reliability thresholds, the proposed detector 

reaches the optimum multiuser detector performance with a 

much smaller complexity. Theoretical equations and results of 

simulation for the complexity and bit error rate are presented. 

The proposed theoretical expressions are very tight when 

compared to the respective simulation results. 

Low Complexity Multiuser Detection Based on 

Reliable Samples: a Baseband Analysis 

Celso Iwata Frison, Celso De Almeida 




Abstract: A sub-optimum multiuser detector which compares 

the received samples to reliability thresholds, in order to 

classify them as reliable or non-reliable, is proposed for 

baseband CDMA system. Each one of these classified samples 

receives a different management in the detection process. This 

technique presents a good trade-off between performance and 

complexity in relation to the optimum multiuser detector. In 

fact, for some values of the reliability thresholds, the proposed 

detector reaches the optimum multiuser detector performance 

with a much smaller complexity. Theoretical equations and 

results of simulation for the complexity and bit error rate are 

presented. The proposed theoretical expressions are very tight 

when compared to the respective simulation results. 

Keywords: CDMA, Complexity, Multiuser Detection, 

Reliability. 


Macrobends effects in single-mode guidance for 

hollow-core fibers 

Daniel Grandin Lona, Arismar Cerqueira Sodre Junior, G. 

Stefanini, Hugo Luis Fragnito, Hugo Enrique Hernandez 

Figueroa 




Vila Velha -ES- Brasil Sep-2010 pp:1 - 6 

Abstract: We observed the effects of macrobending loss in a 

hollow-core photonic crystal fiber with a core of 6.5μm. It was 

obtained a loss of only 0.58 dB for a bending diameter of 4 

mm. 

Keywords: Photonic Crystal Fibers, hollow-core fiber 

(HCPBGF), photonics, optical fibers, bending loss. 

MATVOX: um aplicativo para deficientes visuais 

que proporciona a implementação de algoritmos 

e cálculos matemáticos em um editor de texto 

Henrique Da Mota Silveira, Luiz Cesar Martini 

In: XXI Simposio Brasileiro de Informática na Educação - 

ISBN: 21764301 

João Pessoa, PB Nov-2010 pp:1-4 

Abstract: Este trabalho apresenta o aplicativo MATVOX 

como uma alternativa à falta de recursos voltados para 

deficientes visuais, tanto para o ensino como para o dia a dia 

nas áreas de ciências exatas. Basicamente, o MATVOX é uma 

calculadora programável que é funcional a partir do editor de 

texto do sistema gratuito DOSVOX, que é um sistema de apoio 

ao deficiente visual. A calculadora foi desenvolvida de tal 

forma que permite ao usuário criar algoritmos e cálculos 

matemáticos. O MATVOX foi criado no ano de 2010 e este 

trabalho é um ponto de partida de um projeto de Mestrado para 

o aperfeiçoamento e validação da ferramenta como um 

poderoso recurso na educação de deficientes visuais. 

Modelagem Analítica da Penalidade de Ganho 

Imposta pela ASE na Faixa Dinâmica de AFDE 

com Controle Automático de Ganho 

Adolfo Fernandes Herbster, Júlio César Rodrigues F. De 

Oliveira, Aldario Chrestani Bordonalli 





Abstract: A técnica de controle automático de ganho (CAG) 

em amplificadores utiliza a diferença do sinal de entrada e saída 

como referência. Em amplificadores ópticos, os valores dos 

sinais de entrada/saída são obtidos pela conversão 

optoeletrônica nos fotodetectores, com a finalidade de estimar o 

ganho. Com base neste ganho total, o controle é realizado 

erroneamente, por desconsiderar a parcela de ASE (amplified 

spontaneous emission) que compõem o sinal de entrada/saída. 

O nível do sinal de entrada e o ganho alvo desejado são 

variáveis que influenciam o nível da ASE no sinal óptico de 

saída. Neste trabalho é apresentado um modelo analítico que 

quantifica a relação entre a penalidade de ganho, potência de 

entrada e o ganho alvo, para um amplificador a fibra dopada 

com Érbio (AFDE) com CAG. Por meio deste modelo, o 

processo de caracterização prévia necessário para a 

compensação da ASE em AFDEs é significativamente 

simplificado, proporcionando ganho de tempo e custo na 

construção 

Keywords: Amplificador a fibra dopada com Érbio, 

controle automático de ganho, controle de ganho 

eletrônico, redes ópticas. 

New Multifractal Traffic Model and Its Impacts on 

Buffer Queueing Performances 

Jeferson Stênico, Lee Ling 




Abstract: In this paper, we propose a new analytical 

expression for estimating byte loss probability at a single server 

queue with multi-scale traffic arrivals using Pareto distribution. 

In order to make the estimation procedure numerically tractable 

without losing the accuracy, we assume and demonstrate that an 

exponential model is adequate for representing the relation 

between mean square and variance of Pareto distributed traffic 

processes under different time scale aggregation. Extensive 

experimental tests validate the efficiency and accuracy of the 

proposed loss probability estimation approach and its superior 

performance for applications in network connection with 

respect to some wellknown approaches suggested in the 

literature. 

Keywords: Multiscale Traffic Modeling, Loss 

Probability, network Traffic 

New Results for the alpha-mu Multivariate 

Fading Model 

Guilherme Silveira Rabelo, Rausley Adriano Amaral De Souza, 

Michel Daoud Yacoub 

In: 21st Annual IEEE International Symposium on Personal, 

Indoor and Mobile Radio Communications, PIMRC 2010 

Istambul -Turkey Sep-2010 pp:341 - 346 

doi: 10.1109/PIMRC.2010.5671855 

Abstract: This paper derives an exact, easily computable 

series-type formulation for the multivariate α-µ joint 

cumulative distribution function. Then, based on useful and 

practical assumptions, alternative, new, simpler formulations 

for the α-µ multivariate joint density function and its 

corresponding distribution function are provided. The 

formulations are still general and yet very simple, assuming 

arbitrary parameters and arbitrary correlation among the 

marginal α-µ variates. As an application example, the outage 

probability of the selection combining scheme is obtained, 

again in an exact manner. The results show that only a few 

number of terms of the series is sufficient to provide an 

excellent agreement between approximate and exact results. 

Keywords: α-µ distribution, α-µ distribution, correlated 

fading, correlated fading, diversity methods, diversity 

methods, joint distributions, joint distributions 

O uso do LATEX como parte de um Software 

dedicado aos usuários Deficientes Visuais 

objetivando a elaboração de trabalhos 

científicos envolvendo fórmulas matemáticas 

Luiz César Martini 

In: XIII Encontro Nacional de Usuários de DOSVOX 

Cascavel, PR Out-2010 pp:1-6 

Abstract: As pessoas portadoras de deficiência visual dispõe 

de recursos muito limitados para permitir sua inclusão nas áreas 

da matemática e física. Ao longo dos anos, muitos deficientes 

visuais têm conseguido entrar em cursos de matemática e afins 

nas mais renomadas escolas públicas do país. Contudo a falta 

de ferramentas de apoio no campo da matemática tem feito com 

que os deficientes visuais, depois de serem aprovados em uma 

escola de nível superior, acabem desistindo de frequentar seus 

cursos por absoluta falta de recursos que permitam ao 

deficiente acompanhar seu curso universitário. Nosso primeiro 

trabalho no sentido de melhorar as condições de trabalho dos 

deficientes visuais nas áreas envolvendo matemática, foi o 

programa aplicativo MatVox que atualmente está sendo 

ampliado para oferecer mais possibilidades além das que já 

possue. Um outro recurso desejável é a possibilidade de o 

deficiente visual redigir, elaborar e ler ele próprio, textos 

envolvendo fórmulas matemáticas. Para pessoas videntes, há 

vários aplicativos disponíveis para produção de textos 

envolvendo fórmulas matemáticas. A ferramenta mais 

conhecida é o Word, um aplicativo muito conhecido do 


Windows. Infelizmente o uso deste aplicativo depende 

totalmente da visão, impossibilitando totalmente que o 

deficiente visual trabalhe com ele. Contudo existe uma 

ferramenta muito mais precisa que o Word que fornece 

trabalhos de elevado nível de qualidade, esta ferramenta é o 

LATEX. O LATEX, muito conhecido nos meios científicos, 

permite a elaboração de trabalhos envolvendo fórmulas 

matemáticas com uma qualidade superior ao Word e tem a 

vantagem de que as fórmulas são elaboradas na forma de 

textos, seguindo uma regra de formação e criando um programa 

objeto a partir do qual as fórmulas são convertidas em imagens 

e as figuras e textos são coladas no trabalho. O programa 

LATEX também permite confeccionar em forma de textos 

figuras geométricas que podem ser desenhadas seguindo uma 

equação e também permite a inserção de figuras e imagens no 

trabalho final. Dessa forma é perfeitamente viável que um 

deficiente visual, usando o LATEX, possa redigir seus textos 

científicos. Contudo, o LATEX contém um vasto compêndio de 

regras de formação que dificulta seu aprendizado. Mesmo para 

pessoas videntes exige um certo esforço de aprendizagem para 

se utilizar o LATEX o que faz com que inúmeros videntes de 

preferência por programas mais fáceis de se trabalhar. Um 

outro problema do LATEX para o deficiente visual é a leitura 

dos textos elaborados no LATEX que não traduz de forma 

adequada a fórmula elaborada em LATEX de maneira a que o 

deficiente visual possa ouvir e acompanhar corretamente as 

fórmulas e textos elaborados em LATEX. Este trabalho 

apresenta uma proposta de inclusão digital do deficiente visual 

através da adaptação do LATEX às necessidades de uso pelos 

deficientes visuais 

Optical Amplitude Multiplexing through 

Parametric Amplification: An Analysis for the 

Idler Signal 

André Costa, Marcelo Abbadel, J. D. Marconi, Felipe Rudge 

Barbosa, Edson Moschim 




Abstract: Recently a new technique that used parametric 

amplification in optical fibers to combine two binary signals 

into a single quaternary amplitude-shift keying (4-ASK) signal, 

at frequency of signal to be amplified, was proposed. In this 

paper, other new technique with use of parametric 

amplification, also to combine two binary signals into a single 

quaternary amplitude-shift keying (4-ASK) it is proposed, 

however, the 4-ASK signal will be generated at idler frequency. 

We also develop a theoretical model to predict the power level 

distribution of the 4-ASK signals as a function of the extinction 

ratios of the input binary signals. Computer simulation results 

agree with the predictions of this theoretical model within a 1.3 

dB margin. Finally, was also performed some simulation to 

compare the propagation between 4-ASK idler signal with 4- 

ASK probe signal. This technique could be applied to optically 

generate optical packets. 

Keywords: Optical signal processing, parametric 

amplifiers (PA), quaternary-amplitude shift keying (4 - 

ASK). 

Optical tweezing double negative spherical 

particles using arbitrary laser beams in an 

arbitrary optical regime 

Leonardo André Ambrósio, Hugo Enrique Hernandez Figueroa 

In: 4 International Congress on Advanced Electromagnetic 

Materials in Microwaves and Optics (Metamaterials) 

Karlsruhe- Germany Sep-2010 pp:1 - 6 

Abstract: The fundamental differences between gradient 

forces over double-positive (DPS) and double-negative (DNG) 

particles in optical trapping are outlined, using the generalized 

Lorenz-Mie theory (GLMT) and the integral localized 

approximation. For the first time in the literature, we analyze 

how a DNG particle behaves under the influence of a Bessel 

beam 

Optimized Blind Algorithms for Widely Linear 

Beamforming 

Adilson Chinatto Jr, Cynthia Junqueira, João Romano 




Abstract: The use of array beamforming in modern wireless 

communication systems has been increasingly investigated, due 

to their potential in rejecting interference and improving the 

system capacity. The so-called blind algorithms have been 

considered in such application in order to avoid training 

procedures and improve the overall transmission throughput. 

Most works in the field consider circular signals and classical 

linear signal processing framework. However, the alternative 

scenario of Widely Linear Processing was shown to be more 

suitable under other circularity conditions, particularly in 

rectilinear modulations schemes. This paper deals with blind 

algorithms for array beamforming in a Widely Linear 

Processing framework. We consider the well-known CMA and 

NCMA algorithms and derive corresponding Widely Linear 

formulations with optimized performance. In addition, we show 

that their implementation requires less computational cost than 

the original CMA and NCMA. Simulation results confirm that 

both proposed algorithms perform better than their strictly 

linear counterparts. 

Keywords: widely linear processing, blind algorithms, 

CMA, NCMA, beamforming 

Optimizing Impedance Matching between the 

Exciter -APEX and the GTEM Chamber 


In: 26 2010 IEEE 26-th Convention of Electrical and Electronics 

Engineers - ISBN: 978-1-4244-8681-6 

Eilat- Israel Nov-2010 pp:986 - 990 

doi: 10.1109/EEEI.2010.5661925 

Abstract: The EMC - Electromagnetic Compatibility for 

Electronic Equipment is a critical task in several sectors in the 

industrial environment. Different approaches support the 

compliance tests and have consolidated standard and 

regulations. In many cases, integrated circuits are the mainly 

causes of interference in electronics equipments. In this work it 

is shown the concept and models for matching the APEX 

(exciter) and the GTEM chamber, which is the most important 

and critical step on the construction of the system and its 

optimization. Also, it is shown the basic concepts to design this 

versatile chamber, projected to operate from 500 MHz - 18 

GHz, employed in pre-compliance tests and electromagnetic 

compatibility for automotive/ electronic boards and integrated 

circuits. The GTEM chamber has some advantages over the 

others test setups, mainly in economic terms and the operational 

frequency range. 

Keywords: TEM cells, automotive electronics, 

electromagnetic compatibility, electronic equipment 

testing, exciters, impedance matching, optimisation 

Outage Probability of Multibranch Diversity 

Receivers with Cochannel Interference in 

Generalized Fading Scenarios 

Alexandre Campos Moraes, Daniel Benevides Da Costa, 





Abstract: Wireless systems in a frequency reuse environment 

are subject to cochannel interference, and, in order to improve 

their performance, diversity techniques are deployed. 

Unfortunately, the exact analysis of the outage probability of 

equal-gain combining receivers in such a condition is rather 


intricate and impracticable, because it involves the evaluation 

of multifold nested integrals. In this paper, we propose accurate 

approximate formulations for this problem, whose results are 

practically indistinguishable from the exact solution. In our 

model, the system is composed of M diversity branches and N 

arbitrary independent cochannel interferers. Two sets of fading 

scenarios, namely eta-μ and kappa-μ, are investigated. The 

proposed approach is indeed flexible and accommodates a 

variety of mixed fading scenarios for desired and interfering 

signals. 

Keywords: Approximate formulations, cochannel 

interference, diversity systems, generalized fading, 

outage probability 

Performance of WHT-STC-OFDM in Mobile 

Frequency Selective Channel 

Luciano Leonel Mendes, Renato Baldini Filho 




Abstract: High data rate systems usually employ Orthogonal 

Frequency Division Multiplexing and Space-Time Coding to 

improve the performance on a mobile time-variant frequencyselective 

channel. Nonlinearities introduced by the power 

amplifier can be minimized by performing a Wash- Hadamard 

Transform on the data symbol prior the Inverse Fast Fourier 

Transform (IFFT) at the transmitter. This procedure reduces the 

peak-to-average power ratio of the OFDM symbol. An extra 

advantage of the WHT combined with OFDM is the 

performance improvement on a frequency-selective channel. 

The aim of this paper is to present an analytical expression to 

estimate the performance of the WHT-STCOFDM taking into 

account the receiver/transmitter mobility, the channel frequency 

response and the noise added by the channel. The theoretical 

results are corroborated by computer simulations. 

Keywords: Time-variant frequency-selective channel, 

OFDM, Space-Time Coding, Walsh-Hadamard 

Transform. 

Quaternary LDPC Codes on OFDM Systems 

Maria Leopoldina Martins N. S. Gonçalves, Renato Baldini 

Filho 




Abstract: This paper evaluates the performance of quaternary 

LDPC codes associated to OFDM systems. The LDPC codes 

are based on a ring Z4 of integers modulo-4. Each OFDM 

subcarrier is modulated using a 4-PSK modulation, and each 

output symbol of the encoder is mapped onto that modulation. 

The performance is evaluated, in terms of BER versus Eb/N0, 

for AWGN and frequency-selective fading channels. The 

results show good performance when compared to the channel 

encoding process of the Brazilian Digital Television System 

(SBTVD). 

Keywords: Quaternary LDPC code, OFDM, frequency 

selective fading 

Quaternary Turbo Code on OFDM Systems 

Renata Mataveli Viti, Renato Baldini Filho 




Abstract: This paper analyses the performance of a quaternary 

turbo code associated to OFDM systems. The turbo code is 

based on two-component recursive systematic convolutional 

(RSC) codes defined over a ring Z4 of integers modulo-4. Each 

OFDM subcarrier is modulated using a 4-PSK modulation. The 

performance is evaluated, in terms of BER versus Eb/N0, for 

AWGN, flat and frequency selective fading channels. The 

results show good performance when compared to the channel 

encoding process of the Brazilian Digital Television System 

(SBTVD). 

Sistema Imunológico Artificial Aplicado ao 

Projeto de Acopladores e Demultiplexadores 

Fotônicos 

Vitaly F. Rodrigues, Carlos Henrique da Silva Santos, Hugo 






Abstract: Este trabalho apresenta a implementação e 

aplicação de um algoritmo baseado no sistema imunológico 

artificial, que é uma técnica de inteligência computacional, para 

a otimização de acopladores direcionais baseados em 

multiplexadores. 

Keywords: Acopladores, Sistema Imunológico Artificial, 

Multiplexadores 

Tellurite based PCF with flattened dispersion 

Gilliard Nardel Malheiros Silveira, José Amilton Mores Junior, 

Enver Fernandez Chillcce, Hugo Enrique Hernandez Figueroa, 

Hugo Luis Fragnito 


Recife - PE- Brasil Sep-2010 pp:1 - 6 

Abstract: Tellurite PCF with flattened and near zero 

dispersion was obtained by genetic algorithms simulations 

associated with a finite element modal solver. The fiber 

obtained may be promising for applications in nonlinear optic 

Throughput of CSMA in Hoyt Fading Channels 

Elvio João Leonardo, Michel Daoud Yacoub 



Recife-PE Oct-2010 pp:1-6 

Abstract: This paper investigates the throughput performance 

of carrier sense multiple access (CSMA) in Hoyt fading 

channels. The approach considered includes the signal capture 

model with coherent and incoherent addition of interfering 

signals. The case of uniform attenuation for all terminals (or 

perfect power control) is studied. Analytical and numerical 

results are presented. 

Keywords: Wireless communication, CSMA, Hoyt 

fading. 

Traffic Analysis and Network Protection in 

Photonic Switched Optical Access Networks 

Indayara Bertoldi Martins, Felipe Rudge Barbosa, Edson 

Moschim 

In: 14º SBMO – Simpósio Brasileiro de Microondas e 

Optoeletrônica e 9º CBMag – Congresso Brasileiro de 

Eletromagnetismo 

Vitoria - ES - Brasil Sep-2010 pp:183-188 

Abstract: Metropolitan Access Optical Networks using 

technologies of optical packet/burst switching (OPS/OBS) are 

analyzed in performance and sensitivity to link failure. Through 

analytical modeling and computer simulations we adopt ring 

and mesh (Manhattan Street type) topologies to evaluate the 

impact of link failure in each topology. We usethe parameters 

average number of hops and packet loss fraction to evaluate 

network performance. It is observed that mesh topologies with 

triple-connection node configuration (3x3) are the most robust; 

consequently in case of link failure the impact of lost data is 

minimum as compared 

Keywords: Network Protection, Photonic Switching, 

Optical Packet and Burst Networks, Optical Fiber 

Communications 

User Cooperation Using Multiple Antennas 

Carmen Lúcia Avelar Lessa, Gustavo Fraidenraich 





Abstract: This paper proposes user cooperation strategy using 

multiple antennas technology (MIMO). In a first model we used 

a Code Division Multiple Access (CDMA) system and in a 

second model we apply the techniques of the decorrelator and 

Singular Value Decomposition (SVD) to allow cooperation. We 

show how cooperation using different numbers of antennas can 

be accomplished. It was considered a cooperation scheme for 

MIMO MAC channel with two users having single antenna and 

the receiver with two antennas. The results show that user 

cooperation with multiple antennas reduces the bit error 

probability. 

Keywords: User cooperation, multiple-input multiple. 

Vertical Handoff Algorithms for Heterogeneous 

3G Networks 

Leandro Marques, Shusaburo Motoyama 




Abstract: One of main challenges of fourth generation 

wireless networks (4G) will be the integration of various 

mobile technologies such as CDMA 1xEV-DO RA, 

UMTS/HSDPA and WiMAX. In this paper, the interoperability 

between the CDMA 1xEV-DO RA and the UMTS/HSDPA in 

the 4G context is investigated. New algorithms for vertical 

handoff traffic acceptance are proposed considering the link 

occupation, the buffer occupation, the radio signal strength 

(RSS) or the quantum size (DRR) of each 3G system, taken 

individually or in combination of them, as inputs for decision of 

vertical handoff process. Different algorithms are evaluated 

through QoS metrics such as the average packet delay and the 

loss percentage in function of vertical handoff traffic load. The 

results showed that depending on the chosen algorithm it is 

possible to assure the QoS of 1xEV-DO RA and 

UMTS/HSDPA systems and still to accept a good amount of 

vertical handoff traffic. 

Wavelength conversion characterization of 2-14 

Gb/s BPSK channels based on SOA-FWM 

properties 

Eduardo Cavalcanti Magalhães, Evandro Conforti, Aldario 


In: Congresso Internacional Frontiers in Optics/Laser Science 

Conference of Optical Society of America 

San Jose-CA - USA-USA Oct-2010 pp:1-6 

Abstract: In this work, experimental results of an empirical 

characterization of wavelength conversion of 2-14 Gbps phase 

modulated signals based on SOA nonlinear effects, specifically 

the FWM, were presented. The wavelength converter based on 

FWM presented a 6-nm conversion range (3 nm in up and 

down-conversions) but was sensitive to light polarization, with 

a variation of 8 dB between the worst and best case analyzed. 

Keywords: amplificadores ópticos semicondutores, 

conversão em comprimento de onda, sistemas multicanal 

(WDM) 

Zero-Dispersion- Wavelength Displacement of a 

Photonic Crystal Fiber 

Roddy Elky Ramos Gonzales, Enver Fernandez Chillcce, L.C. 

Barbosa, Hugo Enrique Hernandez Figueroa 


Recife PE - Brasil Sep-2010 

Abstract: The Zero‐Dispersion‐Wavelength (ZDW) of a 

Photonic Crystal Fiber (PCF) may be controlled by changing 

the linear refractive index and the thickness of the thin film that 

covers the inner surfaces of the holes. 

Book 


Unsupervised Signal Processing: Channel 

Equalization and Source Separation Ed.:1 

João Marcos Travassos Romano, Romis Ribeiro de Faissol 

Attux, Charles Casimiro Cavalcante, Ricardo Suyama 

- ISBN: 9780849337512 

CRC Press Boca Raton, FL USA v:1 Sep-2010 pages:340 

Abstract: This book provides a unified, systematic, and 

synthetic presentation of the theory of unsupervised signal 

processing. Always maintaining the focus on a signal 

processing-oriented approach, this book describes how the 

subject has evolved and assumed a wider scope that covers 

several topics, from well-established blind equalization and 

source separation methods to novel approaches based on 

machine learning and bio-inspired algorithms. From the 

foundations of statistical and adaptive signal processing, the 

authors explore and elaborate on emerging tools, such as 

machine learning-based solutions and bio-inspired methods. 

With a fresh take on this exciting area of study, this book: 

Provides a solid background on the statistical characterization 

of signals and systems and on linear filtering theory 

Emphasizes the link between supervised and unsupervised 

processing from the perspective of linear prediction and 

constrained filtering theory Addresses key issues concerning 

equilibrium solutions and equivalence relationships in the 

context of unsupervised equalization criteria Provides a 

systematic presentation of source separation and independent 

component analysis Discusses some instigating connections 

between the filtering problem and computational intelligence 

approaches. Building on more than a decade of the authors’ 

work at DSPCom laboratory, this book applies a fresh 

conceptual treatment and mathematical formalism to important 

existing topics. The result is perhaps the first unified 

presentation of unsupervised signal processing techniques—one 

that addresses areas including digital filters, adaptive methods, 

and statistical signal processing. With its remarkable synthesis 

of the field, this book provides a new vision to stimulate 

progress and contribute to the advent of more useful, efficient, 

and friendly intelligent systems. 

Book Chapter 


22 - An Episodic Memory Implementation for a 

Virtual Creature 

Elisa Calhau de Castro, Ricardo Ribeiro Gudwin 

In: Studies in Computational Intelligence Ed.:1 -- Janusz 

Kacprzyk(Ed.) 

Springer-Verlag Berlin Heidelberg Berlin v:314 Sep- 

2010 pp:393-406 

doi: 10.1007/978-3-642-15223-8_22 

Abstract: This work deals with the research on intelligent 

virtual creatures and cognitive architectures to control them. 

Particularly, we are interested in studying how the use of 

episodic memory could be useful to improve a cognitive 

architecture in such a task. Episodic memory is a 

neurocognitive mechanism for accessing past experiences that 

naturally makes part of human process of decision making, 

which usually enhances the chances of a successful behavior. 

Even though there are already some initiatives in such a path, 

we are still very far from this being a well known technology to 

be widely embedded in our intelligent agents. In this work we 

report on our ongoing efforts to bring up such technology by 

building up a cognitive architecture where episodic memory is 

a central capability. 


5 - On Building Meaning: A Biologically-Inspired 

Experiment on Symbol-Based Communication 

Ângelo Conrado Loula, Ricardo Ribeiro Gudwin, Sidarta 

Ribeiro, Álvaro João Magalhães de Queiroz 

In: Brain Inspired Cognitive Systems 2008 -- Amir Hussain; 

Igor Aleksander; Leslie S. Smith; Allan Kardec Barros; Ron 

Chrisley; Vassilis Cutsuridis(Ed.) - ISBN: 978-0-387-79099 

Serie: Advances in Experimental Medicine and Biology 

Springer New York - USA v:657 Nov-2010 pp:77-93 

doi: 10.1007/978-0-387-79100-5_5 

Abstract: The use of an appropriate set of empirical and 

theorical constraints to guide the construction of synthetic 

experiments leads to a better understanding of the natural 

phenomena under study, and allows for a greater understanding 

of the experimental results. We begin this chapter with a 

description of a general approach for conducting experiments 

with artificial creatures within a synthetic ethological context. 

Next, we describe how this approach was used to build a 

computational experiment regarding the emergence of selforganized 

symbols. Our experiment simulated a community of 

artificial creatures undergoing complex intra and inter-specific 

interactions in which meaning evolved over time, from a tabula 

rasa repertoire of random alarm-calls to a specific set of optimal 

referential alarm-calls. To design different kinds of creatures as 

well as innanimate elements of the environment, we applied 

theorical constraints from the Peircean philosophy of sign and 

empirical constraints from neuroethology. Our results suggest 

that the constraints chosen were both necessary and sufficient 

to produce symbolic communication. 

Keywords: Communication, meaning, semiosis, symbol 

process, self organization, emergence, computer 

simulation 

Mini-courses 

Automation 

Mini curso do (CBA 2010)- 

Análise e Controle de Sistemas Lineares Por Meio de 

Desigualdades Matriciais 

Pedro L. D. Peres & Ricardo Oliveira 

XVIII Congresso Brasileiro de Automática 

Bonito(MS) - Brasil Set-2010 

Abstract: O objetivo deste mini-curso é apresentar uma 

introdução às técnicas de análise e controle de sistemas lineares 

sujeitos a incertezas paramétricas usando métodos de 

otimização baseados em desigualdades matriciais lineares (em 

inglês, Linear Matrix Inequalities - LMIs), ou seja, problemas 

convexos de otimização. Na primeira parte do curso são 

apresentadas condições de Lyapunov para a estabilidade de 

sistemas lineares, extensões para cômputo de normas H2, H∞, e 

para a determinação de ganho estabilizante de realimentação de 

estados. A segunda parte considera a presença de incertezas 

paramétricas nos modelos lineares, provendo condições na 

forma de LMIs para análise e controle robustos. É dado um 

enfoque prático à apresentação das condições, que são 

programadas e testadas em pacotes computacionais, abordando 

exemplos de modelos de sistemas dinâmicos. 

Keywords: Linear Matrix Inequalities, H2 norm, H∞ 

norm 

Master's dissertations 

Automation 

ROBUST FILTERING OF LINEAR TIME 

INVARIANT SYSTEMS BY MEANS OF 

POLYNOMIAL LYAPUNOV FUNCTIONS 

Filtragem robusta de sistemas lineares 

invariantes no tempo por meio de funções de 

Lyapunov polinomiais 

Márcio Júnior Lacerda 

Supervisor: Pedro Luis Dias Peres (DT/FEEC/UNICAMP) 

Defense date: Oct, 27 2010 

Abstract: This work presents new convex optimization 

procedures for full order robust H 2 and H ∞ filter design for 

continuous and discrete-time uncertain linear systems. The 

time-invariant uncertain parameters are supposed to belong to a 

polytope with known vertices. Thanks to the use of a larger 

number of slack variables, and homogeneous polynomial 

relaxations, linear matrix inequalities for the design of robust 

filters can be derived from the proposed conditions, 

outperforming the existing methods. The superiority and 

efficiency of the proposed method for robust filter design are 

illustrated by means of numerical comparisons in benchmark 

examples from the literature. 

Keywords: Uncertain systems, Robust H_2 and Hoo 

filtering, Homogeneous polynomial Lyapunov functions, 

Linear matrix inequalities. 


DETAILED RESIDENCIAL POWER 

CONSUMPTION SYSTEM WITH ZIGBEE 

NETWORK SENSOR 

Sistema de monitoramento detalhado do 

consumo elétrico residencial utilizando rede de 

sensores zigbee 

Jose Douglas Bertazzoni Zambianco 

Supervisor: José Antonio Siqueira Dias 

(DEMIC/FEEC/UNICAMP) 

Defense date: Sep, 30 2010 

Abstract: The electrical segment is always looking for better 

quality of services offered to customers. There is a demand of 

understand the consumption of electrical energy by each 

customer, it can bring an individualized profile that can show 

important informations related to the energy usage and how 

make it better. This works presents a project design, the 

development and implementation of a sensors network 

monitoring the power consumption of each point of a house, 

considering wall sockets, jack, electrical shower and lamps to 

take the percentage of each point usage. 

Keywords: Electric meters, ZigBee, Sensor Networks 

COLLABORATIVE DISTANCE TEACHING OF 

ELECTRONICS IN SYNCHRONOUS AND 

ASYNCHRONOUS ENVIRONMENTS USING FREE 

SOFTWARE 

Ensino colaborativo de eletrônica em ambiente 

síncrono e assíncrono usando software livre 

Luis Rogério Gomes de Almeida 

Supervisor: José Antonio Siqueira Dias 

(DEMIC/FEEC/UNICAMP) 

Defense date: Dec, 15 2010 

Abstract: This research was developed an approach of an 

electronic remote learning. The approach, predicted that online 

collaborative experiments in real time, was tested on a pilot 

course: Practical Operational Amplifiers. 

The aim of this new approach is to diversify the supply of 

vocational training in electronics, through the use of E-learning, 

with synchronous and asynchronous activities. 


Were selected models of learning, instructional project, 

production process and evaluation process. The infra-structure 

environment focus on open source and freeware tools, to meet 

market demand at competitive cost and enable greater 

geographical spread as possible. 

This work, was introduced, in a pioneer manner, perform 

experiments using computer simulations in a collaborative 

environment, changing the learning dynamics and creating a 

new interactive perspective between teacher and students in an 

effective environment for electronic e-learning. It was observed 

with this research a feasible way to teach remotely electronic 

with practical activities interactive and collaborative. 

Keywords: E-Learning, learning environment, 

electronics teaching, free software. 


IDENTIFICATION OF INCONSISTENCIES AND 

INDETERMINACIES OF A MEDICAL EQUIPMENT 

CLASSIFICATION: PARACONSISTENT 

ANNOTATED LOGIC 

Identificação de inconsistências e 

indeterminações na classificação de 

equipamentos médico-hospitalares: lógica 

paraconsistente anotada 

Natália Ferreira Oshiyama 

Supervisor: José Wilson Magalhães Bassani 

(DEB/FEEC/UNICAMP) 


Abstract: Physicians have become dependent on medical 

equipment for safer and more efficient treatment of patients. 

Therefore, medical technology management has become more 

important. This work aimed at developing a methodology for 

classification of medical equipment based on the requirement of 

corrective maintenance, namely, frequency of failures, as well 

as time and cost of this kind of service. Equipment classes were 

established using the Always Better Control analysis (ABC). 

The paraconsistent annotated logic (PAL) was used to identify 

inconsistencies and indeterminacies that might arise from the 

equipment classification, pointing out to the clinical 

engineering team specific equipments that required a more 

detailed, post-hoc, case analysis. As almost 90% of the 

classifications did not present inconsistencies and/or 

indeterminacies, it is possible to conclude that the classification 

was coherent and may be used as a tool for helping clinical 

engineers on their daily management work, new equipment 

acquisition and replacement planning, data mining for 

equipment manufacturers and by regulatory agencies 

Keywords: medical equipment classification, ABC 

analysis, paraconsistent annotated logic, clinical 

engineering. 

Terapia elétrica funcional intensiva no membro 

superior parético de pacientes pós acidente 

vascular encefálico 

Fernanda Passos Dos Reis Ervilha 

Supervisor: José Wilson Magalhães Bassani 


Defense date: Nov, 30 2010 

Abstract: Stroke often results with decreased ability to control 

shoulder and elbow movements, as well as compromised 

grasping. In the last decade, researchers have investigated the 

effect of simultaneously applied intensive neuromuscular 

electrical stimulation and functional exercises, aiming 

rehabilitation of hand movements. Once proved to be effective, 

Intensive Functional Electrical Therapy (IFET) tends to be 

widely used in rehabilitation centers due to decreased treatment 

time needed for each patient. The present study aimed to 

compare the effect of functional therapy with functional therapy 

plus IFET, in short, medium, and in a long term. Ten 

volunteers, with mean (±SD) age and EVA time 63.1 (±11) and 

7.9 (±6.8) weeks and months, respectively, were randomly 

selected and divided in two groups. . Eight volunteers 

concluded the study. Volunteers underwent to 5 weeks of 

treatment, composed of 30 minutes of conventional therapy in 

addition to 30 minutes of IFET. For the experimental group, a 

four channel electrical stimulator Actigrip® CS system was 

used. In the first two weeks of treatment using electrical 

stimulation, only upper limb proximal muscles were stimulated 

(m. deltoid – anterior and lateral fibers), with surface 

electrodes, using a 200 ìs, 50 Hz, compensated monophasic 

pulse, 20-45 mA of intensity. Motor function was evaluated 

using the Upper Extremity Functioning Test -UEFT), Drawing 

Test- DT, and neurological evaluation. Analysis of variance 

(ANOVA) showed significant difference (F(4, 20)=8, 4; p&lt0, 

01) for the parameter number of functional task repetitions. The 

Tukey Honest Significant Difference test showed that both, 

TEFI and control groups significantly increased the number of 

motor task repetitions they could perform in two 

minutes(p&lt0, 03). This was significant when pre-treatment 

was compared with post-treatment (2 and 5 weeks of treatment, 

and 12 and 24 weeks of follow-up). The number of times the 

volunteers performed the motor task increased from 8 to 

approximately 11. In conclusion, functional training of upper 

limb, impaired due to stroke, whether added or not to intensive 

electrical stimulation improved motor function. This result was 

obtained after two weeks of treatment and last for a period of 

24 weeks. 

Keywords: stroke, intensive functional electrical 

therapy, upper extremity paresis, neuromuscular 

electrical stimulation, rehabilitation, functional training, 

grasping, physiotherapy. 

HYPERMEDIA SYSTEM FOR SUPPORT IN 

TECHNICAL TEACHING OF MEDICAL 

EQUIPMENT 

Sistema hipermídia para apoio ao ensino técnico 

de equipamentos médico-hospitalares 

Debora Dias Leister Batista 

Supervisor: Sérgio Santos Muhlen (DEB/FEEC/UNICAMP) 


Abstract: This study presents the construction and evaluation 

of a hypermedia system to facilitate technical teaching of 

medical-hospital equipment, in a technician preparation course 

supported by an industrial institution, aiming to contribute for 

the teach-learning process. In this first version, the hypermedia 

system is focused in one equipment (cardiac defibrillator). It 

was evaluated by a selected group of students, having passed a 

pre-test to determine their previous knowledge on the matter, 

then using the system proposed, and a post-test to evaluate the 

gain. The results showed the learning level was significantly 

greater among students that used the hipermedia system, 

confirming its value for the teaching-learning process. 

Keywords: technical teaching, teach-learning, 

Hypermedia, defibrillator. 


A STUDY ABOUT IMPLEMENTATION OF 

ELLIPTIC CURVE PAIRING BASED 

CRYPTOSYSTEMS IN 8-BIT SMART CARDS 

Um estudo sobre a implementação de 

criptossistemas baseados em emparelhamentos 

bilineares sobre curvas elípticas em cartões 

inteligentes de oito bits 

Matheus Fernandes De Oliveira 

Supervisor: Marco Aurélio Amaral Henriques 

(DCA/FEEC/UNICAMP) 


Abstract: Bilinear pairings over elliptic curves are 

mathematical functions that enable the development of a set of 


new cryptographic protocols, including the so called identity 

based cryptosystems. These cryptosystems represent a new way 

to implement public-key cryptography in such a way that the 

restrictions related to public keys type, size and format are 

reduced or completely removed. This work presents a study 

about implementation of pairing based cryptosystems in 8-bit 

smart cards. We also present new equations to be used in 

Montgomery's Ladder algorithm for scalar multiplication of 

supersingular ellipitic curves over binary fields. These 

equations make the algorithm faster without compromising its 

security characteristics. Finally, we discuss the secure 

delegation of pairing computation, that enables a 

computationally limited device, like smart cards, to delegate the 

paring computation to a powerful device. We propose a 

modification in this technique that decreases the number of 

operations performed by the smart card. 

Keywords: Bilinear pairings, elliptic curves, public-key 

cryptography, identity based cryptosystems, pairing 

delegation, smart cards. 

REAL TIME RAIL FREIGHT CARS ASSIGNMENT 

ALGORITHM 

Algoritmo de distribuição e alocação 

Joelma Cristina Costa 

Supervisor: Fernando Antônio Campos Gomide 



Abstract: The empty car distribution and allocation process of 

railroads is dynamic and involves complex planning 

mechanisms. The empty car distribution and assignment 

problem requires from the decision maker a fast response. Since 

the results should be quickly propagated to the 

terminals(yards), in order to perform maneuvers, activities 

(attach and detach) before trains arrivals. This paper proposes 

an algorithm to solve a decision problem in the real time car 

distribution and assignment planning. The algorithm is based in 

a networks flow model that considers the train scheduling, 

routes and capacity of trains and railroad operations. This work 

also includes a fuzzy distribution algorithm to consider 

information strategic as customer reliability, time horizon 

predictability and uncertainty in the number of cars required by 

the demand. The classical models in the literature has not 

considered strategic information in the distribution and 

assignment planning, but it is always considered when the 

distribution planning is made by the distributors. Experimental 

results has shown that the proposed algorithms provides 

realistic and efficient solutions under quality of solution and 

computational performance point of view. 

Keywords: empty car distribution, car assignment, real 

time planning. 

CONTENT MANAGEMENT IN A LANGUAGE 

TEACHING ENVIRONMENT BASED ON 

INTELLIGENT TUTORING SYSTEM WITH 

LEXEME-AGENTS AND IMAGE SEMANTIZATION 

Gestão de conteúdos em um ambiente de ensino 

de línguas baseado em sistema tutor inteligente 

com agentes-lexemas e semantização de 

imagens 

Ismael Mattos Andrade Ávila 

Supervisor: Ricardo Ribeiro Gudwin 



Abstract: This work proposes an architecture based on an 

Intelligent Tutoring System (ITS) for language teaching 

environments. The main contribution of the proposal is in its 

content selection and sequencing mechanism, and is based on 

the strategy of treating each lexeme of the target language (L2) 

as an autonomous pedagogical unit, instantiated as a software 

agent whose goal is to be learned. This strategy creates a 

bottom-up apporach that is flexible enough to adapt to changes 

in the pedagogical objectives and to reproduce the gradual, 

contextualized and somewhat unconscious nature of the first 

language (L1) acquisition. The proposed architecture is based 

on three main pillars: (i) the lexeme-agents of the target 

language (L2) compete for a limited resource, the course 

interface; (ii) the images used in the course scenes are 

associated to metadata that describe them semantically, 

influencing the behavior of the agents and (iii) an ontology of 

L2 defines the semantic and syntactic relations of its lexemes 

and then underpins the inferences made by the multiagent 

system. 

Keywords: Computational Semiotics, Artificial 

Intelligence, Intelligent Tutoring Systems, Multiagent 

Systems, Ontologies, Metadata, Semantic Web. 

Arquitetura de anotações digitais para grupos 

colaborativos 

Christian Medeiros Adriano 

Supervisor: Ivan L.M. Ricarte (DCA/FEEC/UNICAMP) 


Abstract: Digital annotation systems are developed from 

partial scenarios and arbitrary requirements. Accidental and 

essential features end up mixed in non-explicit models. Such 

software engineering situation addresses the development of 

disposable prototypes. However, it does not support the design 

of architectures for digital annotation for non-functional 

requirements such as extensibility, robustness and interactivity. 

We conducted a careful analysis of the concept of annotation 

and described use scenarios already adopted and supported by 

some kind of tool. The requirements extraction followed 

objective methods capable of critical analysis. From this firm 

and logically structured foundation, we designed a conceptual 

model to serve as the basis for classifying existing systems. The 

model was transformed into a systemic design by a component 

architecture that separates the essential and accidental features. 

We implemented the architecture as plugins in the Eclipse 

environment and demonstrated the effectiveness of the 

proposed model . 

Keywords: 

DATA MINING METHODOLOGY FOR ONLINE 

LEARNING ENVIROMENTS 

Metodologia de mineração de dados para 

ambientes educacionais online 

Geraldo Ramos Falci Júnior 

Supervisor: Ivan Luiz Marques Ricarte 



Abstract: Computer-based distance education is becoming 

popular as computational resources and Internet expand. 

Nevertheless, educators may have difficulties to understand the 

necessities of his classes and therefore improve their courses. 

Usage analysis of these distance Learning Management 

Systems through data mining techniques is a way of obtaining 

relevant information that allow the educator to observe some of 

the classes’ needs and modify his courses accordingly. The goal 

of this work is to elaborate a methodology to allow tackling 

problems of this nature in an objective and flexible way, easing 

the identification of potential problems in the analysis and 

adequate points of feedback to correct and retake the process. A 

sequence of steps is elaborated to constitute this methodology 

and after that is tested with a group of real data obtained from 

the instance of TIDIA-Ae used by UNICAMP as an auxiliary to 

classes in campus. The results show the efficiency of the 

proposed method, although some problems surfaced on these 

results originated from the way the system is employed by 

students and teachers. 


Keywords: Data Mining, Learning Management 

Systems, Online Educational Environments, TIDIA-Ae, 

SAKAI. 

STRATEGIC EVALUATION METHODOLOGY OF 

THE EMBEDDED SOFTWARE ON DIGITAL 

TELEVISION SET-TOP BOXES 

Metodologia de avaliação estratégica do 

software embarcado em receptores de tv digital 

Nilsa Toyoko Azana 

Supervisor: Ivan Luiz Marques Ricarte 



Abstract: Strategic evaluation methodologies have been used 

in a large field of human knowledge, specially in areas such as 

engineering and technology, as a tool for identifying and 

understanding issues related to science, technology and 

innovation. The success of an innovative product or service is 

closely related to different factors like technological 

competition and evolution, strategies of the actors, economical 

constraints, legal framework, social necessities, etc. 

This work develops a methodology that was applied on a 

strategic evaluation to identify the main features of the 

embedded software on digital television set-top box, by means 

of the exploration of feasible paths to the interactive television 

in Brazil. This evaluation shows that the user expectation 

related to digital television is to play a much more active role, 

not only accessing and consuming different information 

through Internet access, but also being able to choose the time 

to enjoy the content through TV program recording. 

Keywords: strategic evaluation, foresight, scenarios, 

embedded software, digital television, middleware. 


MONITORING IN REAL TIME FOR OPTIMIZATION 

OF THE TRANSMISSION LINE 

Otimização do uso da linha de transmissão 

através do monitoramento em tempo real 

Renato Maioli Castilho 

Supervisor: Gilmar Barreto (DMSCI/FEEC/UNICAMP) 


Abstract: This paper presents an analysis method for loading 

of overhead transmission line in real time which relates to 

loading of the transmission line with external factors that 

directly or indirectly exert influence on the operating limits of 

the line. 

Through the implementation of a monitoring system in a line of 

230 kV Eletronorte, weather information and the very line were 

collected and transmitted via cable OPGW to a control center 

where, from a software, we obtained the line ampacity real-time 

using the database generated with information collected by the 

monitoring system and using techniques of artificial neural 

networks, a module was developed to predict the surface 

temperature of the cable, allowing the estimation of ampacity of 

the line in the short term. 

The approach given to data obtained by the monitoring system 

proposed has generated interesting results when it comes to 

finding the best use of the line and proved a very useful system 

for the operation in order to load. 

Keywords: loading of transmission line, ampacity, 

predict loading, thermal loading. 

DEVELOPMENT OF METHODOLOGIES FOR 

ANALYSIS OF POSITIVE FEEDBACK ANTI- 

ISLANDING PROTECTION OF INVERTER-BASED 

GENERATORS 

Análise do impacto da proteção antiilhamento na 

estabilidade de geradores conectados via 

inversores 

Tiago Rodarte Ricciardi 

Supervisor: Walmir de Freitas Filho 

(DSCE/FEEC/UNICAMP) 


Abstract: The usage of inverter-based generators connected 

directly to electric power distribution grids has considerably 

increased in recent years due to technological advances in fuel 

and photovoltaic cells. The anti-islanding protection at the 

interconnection point is among the main technical requirements 

to utilitity integration of this kind of distributed generation. A 

solution commonly employed in the compliance of such 

requirements is the anti-islanding control based on positive 

feedback of deviations of generator’s terminal electrical signals 

from its nominal values, which are continually seeking to 

destabilize the inverter operation to quickly disconect it under 

islanding condition. Since the positive feedback scheme is a 

destabilizing force, the impact of this scheme on the stability of 

a grid-connected DG system and on other DGs becomes a 

natural concern when a large number of inverter-based DG is 

connected to a weak supply system. This thesis investigates the 

impact of such anti-islanding control over stability of 

distribution networks by using modal analysis of a series of 

small-signal models of distribution systems with inverter-based 

generators. 

Keywords: electric power distribution systems, 

distributed generation, antiislanding protection, electric 

power systems dynamic modeling, electric power systems 

stability. 

BLIND SOURCE SEPARATION IN 

POLARIZATION MULTIPLEXED OPTICAL 

SYSTEMS 

Separação cega de sinais em sistemas ópticos 

com multiplexação de polarização 

Eduardo De Souza Rosa 

Supervisor: João Marcos Travassos Romano 

(DMO/FEEC/UNICAMP) 


Abstract: Polarization multiplexing is a promising technique, 

able to double the capacity of next generation optical 

communication systems working at 40 Gb/s. Such systems are 

dependent of digital signal processing, both to separate the 

signals in multiplexed polarization, and to combat impairments 

imposed by optical channel. In general, unsupervised 

techniques such as multiuser CMA are used to perform the 

separation and equalization simultaneously. However, this 

method has some drawbacks, in particular the possibility of 

losing one of the signals when the system has polarization 

dependent loss. This work proposes a new structure for 

demultiplexing employing a separation technique known as 

independent component analysis in conjunction with an 

equalizer adapted by the constant modulus algorithm. The 

proposed technique is evaluated through simulations, 

confirming the good performance in front of the main linear 

distortions present in optical communication systems and being 

more robust in terms of polarization dependent loss. 

Keywords: signal processing, optical communication 

systems, polarization multiplexing, blind source 

separation, independent component analysis 


OPTIMAL CONTRACTS ALLOCATION FOR 

ELECTRIC ENERGY TRADING 

Contratação ótima para comercialização de 

energia elétrica 

Marcelo Richter Fernandez 

Supervisor: Prof. Dr. Christiano Lyra Filho 

(FEEC/UNICAMP) 


Abstract: This work proposes the development of a new 

approach for the operation of electric energy contracts in the 

Brazilian free market. It uses concepts of linear optimization, 

financial mathematics, statistics and considers the Brazilian free 

market regulation. 

The methodology allows traders to maximize their profits by 

using the optimal allocation for each energy contract. It also 

allows traders to simulate trading with different scenarios of 

energy consumption by the customers, spot market prices, 

future market prices and long term contracts. Results allow 

investors to compare energy trading options with other 

alternatives for investments. 

Case studies illustrate the application of the proposed 

methodology to real world scenarios; benefits are also 

evaluated. 

Keywords: portfolio, free market, energy trading, 

trader, electric energy, free customer, spot prices, 

contabilization, optimization, simple 


ELETROMAGNETIC SIMULATOR IN A GRID 

COMPUTING ENVIRONMENT 

Simulador eletromagnético em um ambiente de 

grades computacionais 

Igor José Ferreira De Freitas 

Supervisor: Hugo Enrique Hernandez Figueroa 



Abstract: The aim of this work is to develop the Pre and Post- 

Processing stages from an electromagnetic simulation suite, 

called SSAR-BR, and also a parallel computational 

environment which permits the execution of large 

electromagnetic problems. 

The processing stage, based in the Finite Difference Time 

Domain (FDTD) method, has been already developed as part of 

a doctorate thesis made by a researcher from this department. 

The Pre-processing stage involves a fundamental modeling tool 

capable to model telecommunications devices (radiant sources, 

mobile terminals and anthems) and biological models (human 

body parts and guinea-pig). On the other hand, the Post- 

Processing stage permits visualizing the electromagnetic 

simulations results in a two and three dimensions way. Both 

stages were developed in Java and OpenGL languages. 

The parallel computational environment is based on Grid 

Computing paradigm which consists in software and hardware 

infra-structure that integrates dispersed computational resources 

interconnected across a network. Its purpose is to share such 

resources under an access control policy and establishing a 

scalable, low-cost and high performance computational 

environment. The middleware is the layer between the user and 

operation systems responsible to manage the Grid resources 

and, for this work, the UNICORE 6 was adopted. The mainly 

reasons were its safe and transparent access to the distributed 

environment and, most important, it follows the open patterns 

from OGF (Open Grid Forum) community. 

Keywords: Grid Computing, electromagnetism, 

computers simulation, geometry modeling , graphics 

visualization 

DEVELOPMENT OF A LOW-LOSS RF FEED 

SYSTEM BASED ON SUSPENDED STRIPLINE. 

Projeto de uma rede de alimentação de baixas 

perdas para um arranjo de antenas utilizando 

linhas de fita 

Daniel Nascimento Duplat 

Supervisor: Hugo Enrique Hernandez Figueroa 



Abstract: It presents the development of a feed system using 

stripline in the range of RF. The power supply is used in an 

antenna composed of a linear array of n identical elements 

equally spaced. The work is divided into two parts: the first 

shows the definition of the arrangement’s characteristics, the 

definition of the desired radiation pattern and the methodology 

used to generate this pattern, as well as defining the values of 

amplitude and phase required for each element, the second part 

deals with the development of the stripline network needed to 

obtain the distribution of the total power required for each 

element of the arrangement. This part also presents the 

characteristics of the electromagnetic technology used, their 

difficulties and solutions found to achieve the desired operation 

of the feed system. 

Keywords: antenna array feed system, suspended 

stripline, amplitude distribution, Hamming, radiation 

pattern synthesis 

MEL GENERALIZED CEPSTRAL MODEL FOR 

SPEECH SPECTRAL ENVELOPE 

Modelo Mel-Cepstral generalizado para 

envoltória espectral de fala 

Ramiro Roque Antunes Barreira 

Supervisor: Fábio Violaro (DECOM/FEEC/UNICAMP) 


Abstract: Mel-Generalized Cepstral analysis (MGC) is an 

approach for speech spectral envelope estimation that unifies 

LPC, Mel-LPC, Cepstral and Mel-Cepstral Analysis. The 

functional form of the MGC model varies continuously with the 

real parameters γ e α, enabling the model to acquire different 

characteristics. The flexibility of MGC model associated with 

its stability and good performance under parameter 

manipulation have made MGC parameters to be successfully 

employed in speech codification and HMM (Hidden Markov 

Models) speech synthesis. The present study focuses on 

mathematical aspects of MGC analysis, treating and proving, in 

a fairly extended way, analytical and computational formulation 

for model solution. MGC analysis properties and basic 

formulation are treated in mel-generalized logarithmic spectrum 

perspective. A method for the computation of MGC and Mel- 

Cepstral coefficients that do not require frequency 

transformation recursion formulas is proposed. Experiments 

and analysis concerning the method are in their initial stage and 

needs to be completed in the sense to identify computational × 

representation performances. 

Keywords: Mel-Generalized Cepstral Analysis, Speech 

Spectral Envelope, Speech Analysis and Synthesis, 

Statistical Parametric Speech Synthesis, HMM. 

QUATERNARY LDPC CODES APPLIED TO 

OFDM TRANSMISSION TECHNIQUE 

Códigos LDPC quaternários aplicados à técnica 

de transmissão OFDM 

Maria Leopoldina Martins Neves Seixas Gonçalves 

Supervisor: Renato Baldini Filho 

(DECOM/FEEC/UNICAMP) 


Abstract: The LDPC (Low Density Parity Check) codes 

constitute a efficient family of codes generated by sparse parity 

check matrices and it is considered as one of the classes of 

codes that presents the best performance in digital 


communications systems. LDPC codes over the ring of integers 

modulo-4 (Z4) are the main focus of this work. The standard 

proposed by SBTVD (Brazilian Digital Television System) is 

used as reference for performance comparisons. It is proposed 

the substitution of the inner code in the channel encoding at the 

transmitter, for a LDPC code. The transmission channel is 

influenced by the AWGN (Additive White Gaussian Noise) and 

affected by flat and frequency-selective fading. To minimize 

those interferences it is proposed the associated use of the 

OFDM (Orthogonal Frequency Division Multiplexing) 

technique. The decoding process is based on a generalization of 

the SISO (Soft Input Soft Output) algorithm proposed by P. 

Farrell and J. Moreira. A comparative analysis of the LDPC 

codes is made based on BER performance and on 

computational complexity. Finally, the simulation results for 

different codes lengths are presented, highlighted the 

significantive improvement in performance for LDPC codes. 

Keywords: LDPC Codes, Digital TV, AWGN, Flat and 

Frequency-Selective Fading, OFDM, SISO Algorithm. 

QUALITY EVALUATION OF ENCRYPTED VOIP 

CALLS USING MEAN OPINION SCORE AND 

TRAFFIC CONTROL 

Avaliação da qualidade de chamadas VoIP 

cifradas usando Mean Opinion Score e Traffic 

Control 

Dherik Barison 

Supervisor: Leonardo de Souza Mendes 



Abstract: The purpose of this work is to evaluate the quality 

of encrypted VoIP calls with different cipher algorithms 

through OpenVPN software. This evaluation will do by the 

MOS (Mean Opinion Score), a method to indicate user 

satisfaction of the quality of communication. The encrypted 

VoIP calls will occur in different network scenarios that present 

different problems, like packet loss, out-of-order packets, delay, 

network bandwidths, etc. These scenarios were based on some 

real situations of use and will be emulated with the Traffic 

Control tool from Linux, able of handling the packages sent by 

any available network interface. The scenarios will also have 

different network bandwidths to assess its importance in some 

situations. 

Keywords: VoIP, VPN, MOS, Traffic Control. 

Doctoral thesis 

Automation 

SPAM: FROM THE RISE TO THE EXTINCTION 

Spam: do surgimento à extinção 

Tiago Agostinho De Almeida 

Supervisor: Akebo Yamakami (DT/FEEC/UNICAMP) 


Abstract: Spam has become an increasingly important 

problem with a big economic impact in society. Spam filtering 

poses a special problem in text categorization, in which the 

defining characteristic is that filters face an active adversary, 

which constantly attempts to evade filtering. In this thesis, we 

present a comprehensive study of the spamming problem. 

Among many offered contributions we present: the statistical 

and historical survey of spamming and its consequences, a 

study regarding the legality of spams and the main juridic 

methods adopted by some countries, the study and proposal of 

new performance measures used for the evaluation of the spam 

classifiers, the proposals for improving the accuracy of Naive 

Bayes filters by using dimensionality reduction techniques and 

a novel approach to spam filtering based on the minimum 

description length principle and confidence factors. 

Furthermore, we have conducted an empirical experiments 

which indicate that the proposed classifier outperforms the 

state-of-the-art spam filters. 

Keywords: spam filtering, classification, text 

categorization, junk mails, information retrieval, 

machine learning, minimum description length. 

INTERIOR POINT METHODS APPLIED TO 

PREDISPATCH WITH SIMULTANEOUS BAR AND 

LINES MANEUVERS 

Métodos do pontos interiores aplicados ao prédespacho 

com manobras simultâneas de barras 

e linhas 

Silvia Maria Simões de Carvalho 

Supervisor: Christiano Lyra Filho 

(DENSIS/FEEC/UNICAMP) 


Abstract: In this work the primal-dual interior point method is 

used to minimize the DC predispatch generation costs and 

transmission losses on hydroelectric power system with 

previously scheduled maneuvering. A matrix structure study is 

performed, to consider the changes that occur in the system 

along the planning period. Some linea systems solved at each 

iteration depend only of network physical data and topology 

Such matrices can be decomposed before starting the iterative 

process speeding up the implementation. Numerical 

experiments with IEEE and real Brazilian power systems show 

that the proposed approach is fast and robust obtaining 

convergence in 

all test performed. 

Keywords: Interior Point Methods, Schedulled 

Maneuver, Predispatch Problem, Power Systems. 


FREQUENCY-DEPENDENT CHANGES IN 

FRACTIONAL SARCOPLASMIC RETICULUM 

CA2+ RELEASE IN RAT CARDIAC MYOCYTES 

Liberação fracional de ca2+ do retículo 

sarcoplasmático em miócitos cardíacos de ratos 

estimulados em diferentes freqüências 

Rafael de Almeida Ricardo 

Supervisor: Jose Wilson Magalhães Bassani 



Abstract: The force-frequency relationship is an intrinsic 

characteristic of cardiac muscle and its mechanisms still remain 

to be completely understood. The main goal of this work was to 

determine the relationship between the fractional Ca2+ release 

(FR) and stimulatory frequency in isolated rat ventricular 

myocytes. Action potentials, L-type Ca2+ current (ICaL) and 

intracellular Ca2+ transient (D[Ca2+]i) were recorded using the 

whole-cell patch-clamp technique at different rates. FR at a 

twitch was assumed to be the ratio of the systolic variation in 

total [Ca2+] minus ICaL integral, and the SR content 

([Ca2+]SR). APD90 increased from 76 ± 9 ms at 0.2 Hz to 130 

± 11 ms at 2 Hz. At 0.2 Hz, ICaL peak was -4.5 ± 0.7 pA/pF, 

and it decreased to -2.7 ± 0.4 pA/pF with increasing frequency 

to 2 Hz. D[Ca2+]i decreased from 603 ± 56 nM to 408 ± 32 

nM, at 0.2 and 2 Hz, respectively. FR also decreased with 

frequency, from 0.81 ± 0.02 at 0.2 Hz to 0.54 ± 0.02 at 2 Hz, 

whereas [Ca2+]SR did not change significantly. The negative 

relationship between Ca2+ transient and stimulation rate is 

likely to be due to the decreased Ca2+ release. Lower FR at 

higher rates might be due to decrease in ICaL peak, which is 

the main trigger of sarcoplasmatic reticulum Ca2+ release. 

Keywords: ventricular myocyte, force-frequency 

relationship, Ca2+ transport, patch-clamp. 


COMPACT FORWARDING: A PROBABILISTIC 

APPROACH TO 

Compact forwarding: uma abordagem 

probabilística para o encaminhamento de 

pacotes em redes orientadas a conteúdo 

Christian Rodolfo Esteve Rothenberg 

Supervisor: Maurício Ferreira Magalhães 



Abstract: This thesis introduces the concept of compact 

forwarding in the field of content-oriented networks. The main 

idea behind this concept is taking a probabilistic approach to 

the problem of packet forwarding in networks centered on 

content identifiers rather than traditional host addresses. The 

fundamental question explored is where to place the packet 

forwarding state, in network nodes or in packet headers? 

Solutions for both extremes are proposed. In the SPSwitch, 

approximate forwarding state is kept in network nodes. In 

LIPSIN, the state is carried in the packets themselves. Both 

approaches are based on probabilistic packet forwarding 

functions inspired by the Bloom filter data structure. The 

approximate forwarding state comes at the cost of additional 

considerations due to the effects of one-sided error-prone data 

structures. The thesis contributes with a series of techniques to 

mitigate the false positive errors. The proposed compact 

forwarding methods are experimentally validated in several 

practical networking scenarios. 

Keywords: Packet forwarding, algorithms, data 

structures, Bloom filter 


BICLUSTERING IN THE ANALYSIS OF 

UNCERTAIN DATA 

Biclusterização na análise de dados incertos 

Fabrício Olivetti De França 

Supervisor: Fernando José Von Zuben 



Abstract: The data acquisition process is subject to many 

inconsistencies and uncertainties. These uncertainties may 

produce noisy data or even provoke the absence of some of 

them, thus leading to the missing data problem. Most 

procedures used to deal with such problem act in a global 

manner, relatively to the dataset, and ignore the noise effect on 

such analysis. The objective of this thesis is to explore the 

properties of the so called biclustering method, which performs 

a local data analysis, creating several imputation models for the 

dataset in order to minimize the prediction error when 

estimating missing values of the dataset. First, it is proposed a 

new biclustering algorithm with a better performance than the 

one produced by other traditional approaches, with emphasis on 

the noise reduction capability of the models generated by the 

biclusters. Next, it is proposed the formulation of a quadratic 

optimization problem to impute the missing data by means of 

the local models engendered by a set of biclusters. The obtained 

results show that the use of biclustering helps to reduce the 

prediction error of data imputation, besides providing some 

interesting conditions for an a posteriori analysis of the dataset. 

Keywords: biclustering, data imputation, machine 

learning, missing data, noisy data 


THREE-PHASE ELECTRONIC POWER 

CONVERTER FOR 

Conversor eletrônico de potência trifásico para 

sistema fotovoltaico conectado à rede elétrica 

Marcelo Gradella Villalva 

Supervisor: Ernesto Ruppert Filho 

(DCSE/FEEC/UNICAMP) 


Abstract: This work is a contribution to the study of power 

converters for photovoltaic distributed generation systems. The 

main objective is to present the development and the 

construction of a three-phase power converter for a gridconnected 

photovoltaic plant. The work presents experimental 

results and theoretical studies on the modeling and simulation 

of photovoltaic devices, regulation of the photovoltaic voltage, 

maximum power point tracking, and modeling and control of a 

two-stage grid-connected power converter. 

Keywords: Converter, solar, photovoltaic, distributed, 

generation, inverter. 

STUDY AND IMPLEMENTATION OF A CURRENT 

CONTROL FOR MATRIX CONVERTERS AND 

VOLTAGE SOURCE INVERTERS WITHOUT DC 

LINK CAPACITOR 

Estudo e implementação de um controle de 

corrente para conversores em matriz e 

inversores fonte de tensão sem capacitor no elo 

de corrente contínua 

Milton Evangelista de Oliveira Filho 




Abstract: This thesis concern a current control method for 

three-phase matrix converter and three-phase voltage source 

inverter without a dc link capacitor in order to mitigate and 

compensate the distortions present in the output voltages so that 

the output currents are sinosoidal. In these converters, because 

of lack of large storage elements, imbalances and/or distortions 

present in the input voltage will be immediately reflected to the 

converter output voltages. The proposed current control model 

forces the magnitude of the output space vector current to be 

constant through a PI controller that dynamically alters the duty 

cycle of the power converter switching for compensating the 

imbalances and distortions from input voltages. The 

performance of this current control is validated by simulations 

implemented in Matlab and experimental results on the 

prototype of a voltage source inverter without a DC link 

capacitor feeding a three-phase RL load. 

Keywords: 

WOUND ROTOR THREE-PHASE INDUCTION 

GENERATOR ACTIVE AND REACTIVE POWER 

CONTROL APPLIED TO WIND GENERATION 

BASED ON THE GENERATOR DYNAMIC 

MATHEMATICAL MODEL 

Controle de potências ativa e reativa de 

geradores de indução trifásicos de rotor 

bobinado para aplicação em geração eólica com 

a utilização de controladores baseados no 

modelo matemático dinâmico do gerador 

Alfeu Joãozinho Sguarezi Filho 




Abstract: Wind energy is an alternative to the growing 

demand for electricity and concerns about emission reductions 

of pollutants worldwide. In this context, the objective of this 

thesis is to propose the use of three types of real and reactive 

power controllers of the wound rotor three phase induction 

generator to be used in wind farms. The proposed controllers 

are the deadbeat controller, the controller by decoupling stator 

winding magnetic flux associated with the deadbeat controller 

and finally, the predictive control, all based on the generator 

dynamic mathematical model. The generator has its stator 

windings directly connected to the grid as its rotor windings 

connected to the network through a bi-directional converter that 

allows the power flow in the two directions. It also evaluates 


the performance of the mentioned power controllers when there 

are errors in the estimated generator´s parameters. Results of 

computer simulations of the system dynamic mathematical 

model and experimental results obtained on a laboratory 

assembly are presented to check the proposals. 

Keywords: doubly-fed induction generator, wound rotor 

induction generator, dfig, vector control, control by 

stator flux orientation, deadbeat controller, controller of 

disturbance decoupling and deadbeat, model-based 

predictive control. 


ANOMALY DETECTION IN COMPUTER 

NETWORKS 

Detecção de anomalias em redes de 

computadores 

Bruno Bogaz Zarpelão 

Supervisor: Leonardo de Souza Mendes 



Abstract: Anomalies are unexpected and significative 

deviations that occur in network traffic due to different 

situations such as software bugs, unfair resource usage, failures, 

misconfiguration and attacks. At the present time, networks are 

very important to academic, governmental and enterprise 

environments. Thus, detecting and handling anomalies 

efficiently became an essential task. In this work, it is proposed 

an anomaly detection system based on three levels of analysis. 

This anomaly detection system identifies anomaly occurrences 

and offers to the network administrator a wide-network view of 

the problem, supporting its solution. Moreover, this system was 

developed in GBA tool context. Tests were performed in the 

State University of Londrina network, exploring real situations. 

Results showed that the proposal has a great detection potential, 

is able to adapt to different management policies and decreases 

the possibility of network administrators' overload. 

Keywords: Network management, Anomalies, Alarms, 

SNMP, Baseline. 

ITERATIVE RECEIVERS FOR A T-USER N- 

FREQUENCY MULTIPLE ACCESS CHANNEL 

WITH NOISE 

Receptores iterativos para canais de acesso 

múltiplo ruidosos com n frequencias e t 

usuários 

Manish Sharma 

Supervisor: Jaime Portugheis (DECOM/FEEC/UNICAMP) 


Abstract: The purpose of this work is to analyse the 

performance of iterative joint reception and detection for 

multiuser channels. The analysis was centered around an Nfrequency 

noisy channel shared by T users. Channel capacity 

values were obtained for joint and single user detection. 

Altough the system’s spectral efficiency is low, the 

combination of low spectral efficiency and high bandwith 

allows for transmission of information with high rates and low 

signal to noise ratio. The receiver was modeled as a factor 

graph and analysed by its EXIT charts, which were also used to 

analyse the users’ error correcting codes. Some systems are 

proposed and simulated to obtain the bit error probability. 

Results indicate that it is possible to transmit information with 

rates close to channel capacity. Both the receiver and the 

analysis performed can be applied to other types of multiple 

access channels, in particular for systems with N ortoghonal 

transmission symbols. 

Keywords: joint detection, channel capacity, Multiuser 

systems, iterative algorithms, factor graphs 

SCHEDULING AND HANDOFF ALGORITHMS 

FOR 3G AND 4G NETWORKS 

Algoritmos de escalonamento e de handoff para 

redes 3g e 4g 

Leandro Bento Sena Marques 

Supervisor: Shusaburo Motoyama (DT/FEEC/UNICAMP) 


Abstract: This work presents a performance study of the 

forward links of CDMA 1xEV-DO RA, UMTS/HSDPA and 

WiMAX systems with emphasis on data schedulers and new 

criteria for horizontal and vertical handoff traffic acceptance in 

the 3G and 4G networks. These new criteria for horizontal and 

vertical handoff traffic acceptance take into account the link 

occupation, the buffer occupation, the received signal strength 

(RSS) and the size of quantum (DRR) as inputs for decision of 

handoff process. Moreover, the study considers the data 

schedulers Max C/I (Maximum Carrier Interference), DRR 

(Deficit Round Robin), PF (Proportional Fair), priority and the 

new proposal Pr/PF (Priority Proportional Fair). The criteria 

combined with the data schedulers are evaluated using QoS 

metrics in function of internal HTTP traffic or handoff traffic. 

The results showed that depending on the chosen criterion and 

scheduler, it is possible to assure the QoS of mobile systems 

and still accept a good amount of handoff traffic. The study is 

based on computer simulations through Matlab software tool. 

Keywords: horizontal handoff, WiMAX, UMTS/HSDPA, 

CDMA 1xEV-DO RA, vertical handoff, HTTP traffic, 

Pr/PF scheduler. 


Acknowledgement 

Authors 

With great enthusiasm we express our gratitude to all authors and research partners that made this summary of 

FEEC’s productivity such a remarkable record. The names of the authors of our works in 2010 are listed below. They 

are faculty members, researchers and students of FEEC and colleagues from partner institutions. We had made a 

special effort to include all the contributor names, in their original format. We apologize for possible oversights and 

errors in the list. 

A 

Abílio Rafael Martins Soares 

Adalberto Nobiato Crespo 

Adilson Chinatto Jr 

Adolfo Fernandes Herbster 

Adriane Bellé 

Adriano Luís Toazza 

Adriano Mesquita Alencar 

Afonso J. Prado 

Ahda P. G. Pavani 

Akebo Yamakami 

Aldario Chrestani Bordonalli 

Alessandra Benevides Camara 

Alessandro de Lima Bicho 

Alessandro do Nascimento Vargas 

Alex da Rosa 

Alexandre Campos Moraes 

Alexandre Xavier Falcão 

Alexandre de Aguiar Amaral 


Alfredo Carlos Peterlevitz 

Alfredo R. de Freitas 

Alice Maria Bastos Hubinger 

Tokarnia 

Alim Pedro de Castro Gonçalves 

Alireza Mohebi Ashtiani 

Alisson Gusatti Azzolini 

Aléx Garcia Gonçalves 

Álvaro João Magalhães de Queiroz 

Amauri Amorin Assef 

Amauri Lopes 

Ana Amélia Rodrigues 

Ana Beatriz Alvarez Mamani 

Ana Claudia Vasconcelos Soares 

Bulcão 

Ana Luiza Metidieri Cruz Malthez 

Ana María Ramírez Buitrago 

Andrea F. da Cruz 

András Zahemszky 

André Costa 

André Emilio Toscano 

André Filgueiras de Araujo 

André Kazuo Takahata 

André Körbes 

André Luiz Morelato Franca 

André Luiz Rayol Cavalcante 

André Luís Shiguemoto 

André Paim Lemos 

André R. Fioravanti 

André Ricardo Abed Grégio 

André Ricardo Gonçalves 

André Schonardie Pasqual 

André Tavares da Silva 

Andréa Santos Leite da Rocha 

Angelo Conrado Loula 

Angelo Moretti 

Angélica Denardi de Barros 

Anibal Tavares de Azevedo 

Aniruddha M. Gole 

Annalisa Zappavigna 

Annikki Welin 

Antonio Aparecido de Andrade 

Antonio Augusto de Godoy Von 

Zuben 

Anésio dos Santos Jr. 

Argollo Junior 

Ariovaldo Verandio Garcia 

Arismar Cerqueira Sodre Junior 

Arnaldo Fim Neto 

Aurelio Ribeiro Leite de Oliveira 

B 

Beatriz de Lima Tavares 

Bertrand Cottenceau 

Bruce Pike 


Bruno Teixeira de Abreu 

C 

Camila Socolowski de Almeida 

Carla Verissimo 

Carlile Campos Lavor 

Carlos Alberto Baldan 

Carlos Alberto Bráz Macapuna 

Carlos Alberto Favarin Murari 

Carlos Alberto Murari Pinheiro 

Carlos Alberto de Castro Jr. 

Carlos Alberto dos Reis Filho 

Carlos Arturo Levi D’Ancona 

Carlos Daniel Altamirano Carrillo 

Carlos Eduardo Capovilla 

Carlos Eduardo Pinto Pereira 

Carlos Henrique da Silva Santos 

Carlos Henrique de Brito Cruz 

Carlos Manuel Portela 

Carlos Medeiros Portela 

Carlos Pinheiro 

Carlos Y. Shigue 

Carmen Lúcia Avelar Lessa 

Carmen Silvia Bertuzzo 

Carolina M. Affonso 

Cecília F. Morais 

Celso Aleixo de Barros 

Celso Iwata Frison 

Celso Pascoli Bottura 

Celso de Almeida 

Celso de Sousa Júnior 

Cesareo de La Rosa Siqueira 

Chaouki T. Abdallah 

Charbel Niño El-Hani 

Charles Casimiro Cavalcante 

Christian Jutten 

Christian Rodolfo Esteve 

Rothenberg 

Christiano Lyra Filho 

Christophe Prieur 

Clarice Dias de Albuquerque 

Clarissa Fernanda Correia Lima 

Loureiro 

99 

Claudio Jung 

Cleuson de Menezes Atayde 

Clésio Luis Tozzi 

Cosme Eustaquio Rubio Mercedes 

Cresencio Silvio Segura Salas 

Cristiano Marcos Agulhari 

Cristiano Monteiro de Barros 

Cordeiro 

Cristiano de Mello Gallep 

Cristina A. Maia 

Cynthia Cristina Martins Junqueira 

Cátia Regina de Oliveira Quilles 

Cédric Cassagnettes 

César Daltoé Berci 

D 

D.C. Boer 

Dalton Soares Arantes 

Daniel Benevides da Costa 

Daniel Felix de Brito 

Daniel Figueiredo 

Daniel Furtado Leite 

Daniel Grandin Lona 

Daniel Guerreiro e Silva 

Daniel Moutinho Pataca 

Daniel Pedro Bezerra Chaves 

Danielle Ferreira Feliciano 

Danilo B. do Valle 

Danilo I. Brandão 

Dario Simões Fernandes Filho 

Darko Kirovski 

Davi Franco Rêgo 

David Jacques Cohen 


Denis Barbier 

Diana Pamela Moya Osorio 

Diego Souza Bezerra 

Diogo Coutinho Soriano 

Diogo Gará Caetano 

Diogo Salles 

Douglas Airoldi 

Douglas José Alem 

E 

Eddy Krueger-Beck 

Edgar Eduardo Benitez Olivo 

Edmundo da Silva Braga 

Edna Marina Souza 

Edson Adriano Vendrusculo 

Edson Bim 

Edson Donizete de Carvalho 

Edson Felipe Ribeiro da Fonseca 

Edson Fonseca 

Edson José Nagle 

Edson José de Carvalho 

Edson Moschim 

Eduardo B. Neves 

Eduardo Brandani da Silva 

Eduardo C. M. Costa 

Eduardo Cavalcanti Magalhães

Eduardo Jorge Valadares Oliveira 

Eduardo Luís Carrara 

Eduardo Mendonça Scheeren 

Eduardo Rocha de Souza 

Eduardo Rosa 

Eduardo Stockler Tognetti 

Eduardo Tavares Costa 

Eduardo V. Liberado 

Eduardo Zanoni Marques 

Edwar Velarde Allazo 

Elaine Belassiano 

Eleri Cardozo 

Eliane Gomes Guimarães 

Eline A. C. Barbosa 

Elisa Calhau de Castro 

Elisangela Ferretti Manffra 

Elma Pereira Santos 

Elnatan Chagas Ferreira 

Elton Mário de Lima 

Elvio João Leonardo 

Enver Fernández Chillcce 

Erasmo Recami 

Éricles Rodrigues Sousa 

Erinaldo Farias Dos Santos 

Ernesto Kenji Luna 

Ernesto Ruppert Filho 

Estevan Lopes 

Ettore Baldini Neto 

Eugênio Spanio Rosa 

Evandro Conforti 

Everton Luiz de Almeida Gago 

Junior 

Everton Zaccaria Nadalin 

F 

Fabbryccio Akkazzha Chaves M. 

Cardoso 

Fabiano Fragoso Costa 

Fabiano Fruett 

Fabio Luciano Verdi 

Fabio Morelato França 

Fabrizio Cesare Filippo Di Pasquale 

Fabrício Olivetti de França 

Felipe Rudge Barbosa 

Fellipe Saldanha Garcia 

Ferando Cardoso Fajoni 

Fernanda Caseño Lima Trindade 


Fernando D. Penha 

Fernando José Von Zuben 

Fernando Oscar Runstein 

Fernando P. Marafão 

Fernando Paolieri Neto 

Fernando Pinho 

Filipe Dias Baumgratz 

Filipe Ieda Fazanaro 

Flavio Henrique Teles Vieira 

Flávio Olmos Simões 

Francisco José Arnold 

Francisco Ubaldo Vieira Júnior 

Franklin César Flores 

Frederico Milano 

Fábio Luiz Usberti 

G 

G. Stefanini 

Gabriel Rocon Bianchi 

Gabriela Castellano 

Gean Francesco Chu 

Gerardo Miguel Agurto Lescano 

Germain Garcia 

Gerson Florence Carvalheira de 

Azevedo 

Gilliard Nardel Malheiros Silveira 

Gilmar Barreto 

Gilmário Barbosa dos Santos 

Gina Andrea Quelal Quelal 

Giselle Ferrari 

Gislaine A. Asti 

Giuliano Gadioli La Guardia 

Glades Serra 

Glauco Niro 

Grace Silva Deaecto 

Graziano Chesi 

Guilherme Nunes Nogueira Neto 

Guilherme Palermo Coelho 

Guilherme Silveira Rabelo 

Guilherme de Oliveira Coraucci 

Gustavo A. Elias 

Gustavo Fraidenraich 

Gustavo H.C. Oliveira 

H 

H. Kishan 

H.D. Mathur 

Helder José Ceragioli 

Helmo K. M. Paredes 

Heloisa H. Müller 

Heloisa Pimentel 

Henrique Mineo Ashihara 

Henrique Sarmento Malvar 

Henrique Takachi Moriya 

Henrique da Mota Silveira 

Hugo Enrique Hernández-Figueroa 

Hugo Luis Fragnito 

Hugo Murici Ayres 

Hugo Ricardo Jimenez Grados 

Humberto César Brandão de 

Oliveira 

Humberto Pinheiro 

Humberto Xavier de Araujo 

I 

Iara da Cunha Ribeiro da Silva 

Igor Kopcak 

Iguatemi E. Fonseca 

Indayara Bertoldi Martins 

Ioannis M. Besieris 

Ioshiaki Doi 

Isaías Lima 

Ivanil Sebastião Bonatti 

J 

Jacobus Willibrordus Swart 

Jaime Portugheis 

Jakson Paulo Bonaldo 

Jamal Daafouz 

Jan de Caigny 

Janio Coutinho Canuto 

Jeferson Wiliam de Godoy Stenico 

Jennifer Campbell 

Jeremias Barbosa Machado 

Joaquim Miguel Maia 

Joel José Puga Coelho Rodrigues 


Johannes Dantas de Medeiros Júnior 

Jonas Lemos Talaisys 

Jonas Rafael Gazoli 

Jorge Diego Marconi 

José A. Prado 

José Alexandre Diniz 

José Amilton Mores Junior 

José Antenor Pomilio 

José Antonio Siqueira Dias 

José C. C. Campos 

José Claudio Geromel 

José Douglas Bertazzoni Zambianco 

José E. Bertuzzo 

José Erick de Souza Lima 

José Federico Vizcaino González 

José Leite da Silva Junior 

José Luis Azcue Puma 

José Luis Verdegay 

José Mario de Martino 

José Matias Lemes Filho 

José Patrocínio da Silva 

José Pissolato Filho 

José Raimundo de Oliveira 

José Ricardo Mendes 

José Wilson Magalhaes Bassani 

Jozué Vieira Filho 

João Bosco Gertrudes 

João Bosco Ribeiro do Val 

João Carlos Martins de Almeida 

João Henrique Kleinschmidt 

João Marcos Travassos Romano 

João Y. Ishihara 

Juan Francisco Camino dos Santos 

Juliana Lopes 

Juliana Miyoshi 

Juliano Fujioka Mologni 

Juliano Rodrigues Brianeze 

Jurandy Almeida 

Jussara Rodrigues Ciappina 

Jussi Kangasharju 

Jérika Suely Lamas 

Júlio César Medeiros Diniz 

Júlio César Rodrigues F. de Oliveira 

K 

Katia Franklin Albertin 

Kleber Betini Vieira 

L 

Leonardo Andre Ambrosio 

Luiz Alberto Castro de Almeida 

Luiz Carlos Barbosa 

Leonardo Novaes do Nascimento 

Laurent Hardouin 

Leandro Marques 

Leandro Nunes de Castro Silva 

Leandro Percebon 

Leandro Tiago Manêra 

Leandro de Campos Teixeira Gomes 

Lee Luan Ling 

Leo Pini Magalhaes 

Leonardo A. Gomes 

Leonardo André Ambrósio 

Leonardo Lorenzo Bravo Roger 

Leonardo Ribeiro de Carvalho 

Fonseca 

Leonardo Tomazeli Duarte 

Leonardo de Souza Mendes 

Leticia Rittner 

Lourival Aparecido de Gois 

Luciana Casacio 

Luciano Bernardes de Paula 

Luciano Leonel Mendes 

Lucila Helena Deliesposte Cescato 

Lucio Agostinho Rocha 

Luis Antonio Rodrigues 

Luis Enrique Gutierrez Rivera 

Luis Geraldo Pedroso Meloni 

Luis Noguera 

Luiz Antonio Maccari Junior 


Luiz Carlos Barbosa 

Luiz Carlos Kretly 

Luiz Carlos Pereira da Silva 

Luiz Cesar Martini 

Luiz Eduardo da Silva 

Luiz F. Bovolato 

Luiz Felipe Mendes de Moura 

Luiz Humberto Rabelo Sucupira 

Junior 

Luiza Amalia Pinto Cantão 

Luzinete Cristina Bonani de Faria 

Luís Fernando Caparroz Duarte 

Luís Otávio Mataveli 

Luís Rogério Gomes de Almeida 

M 

M. F. Rautemberg 

Márcio Castro Silva-Filho 

M. Tazil 

Madson Cortes de Almeida 

Manfred Fritz Bedriñana Aronés 

Manish Sharma 

Marcel S. Silva 

Marcelo Abbadel 

Marcelo Paravisi 

Marcelo Ribeiro Nascimento 

Marcelo S. Castro 

Marco Antonio Robert Alves 

Marco Aurelio Cazarotto Gomes 

Marconi Kolm Madrid 

Marcos Julio Rider Flores 

Marcos Lordello Chaim 

Marcos Nereu Arenales 

Marcos Rogério Salvador 

Marcos Sergio Gonçalves 

Marcus Pantoja da Silva 

Maria Cristina Dias Tavares 

Maria Leopoldina Martins N. S. 

Gonçalves 

Mariana Sacrini Ayres Ferraz 

Mariella Renata Cumpa Aurich 

Marina B. Duque 

Marina Carneiro Monteiro 

Marina Lavorato de Oliveira 

Marina Tachibana 

Marinho G. Andrade 

Mario Jino 

Mario Lemes Proença Junior 

Marjorie F.R. Silva 

Marli de Freitas Gomes Hernandez 

Mateus Bonadiman 

Mateus Giesbrecht 


Maurício C. Oliveira 

Maurício Gomes Duarte 

Maurício Silveira 

Max Henrique Machado Costa 

Mayk Vieira Coelho 

Mercedes Rocío Gonzales Márquez 

Mercio Botelho Faria 

Michel Bortolini Hell 


Michel Zamboni Rached 

Miguel de Teive 

Milton Elvis Zevallos Alcahuaman 


Mitchell Omar Calderon Inga 

Monica de Souza Zambelli 

Murilo Bellezoni Loiola 

Márcia Zotti Justo Ferreira 

Márcio Aparecido Muller 


Mário Uliani Neto 

N 

Napoleão dos Santos Ribeiro 


Newton Soares da Silva 

Niederauer Masterali 

Nilson Antunes 

O 

Odair Jacinto da Silva 

Oderson Dias de Mello 

Orlando Petrucci Junior 

Oscar de Lima 

Otávio Augusto Salgado Carpinteiro 

P 

P. A. Figueiredo 

Pablo Alberto Dalbem de Castro 

Pascal Larzabal 

Patricia Mestas Valero 

Patrizio Colaneri 

Patrícia L. Cavalcante 

Paula Dornhofer Paro Costa 

Paulo Anderson Holanda Cavalcante 

Paulo Augusto Valente Ferreira 

Paulo C. M. Meira 

Paulo Cardieri 

Paulo David Battaglin 

Paulo Licio de Geus 

Paulo Marcos Siqueira Bueno 

Paulo Morelato Franca 

Paulo Victor de Oliveira Miguel 

Pedro Augusto Munari 

Pedro Carvalhaes Dias 

Pedro Luis Dias Peres 

Pedro Paulo Martins de Oliveira 

Pedro Xavier de Oliveira 

Percy Nohama 

Peter Jurgen Tatsch 

Philippe Forster 

Pierre Alexandre Bliman 

Plinio Cesar Simões Fernandes 

Pyramo Pires da Costa Júnior 

R 

R. P. Ferreira 

R. Yoshioka 

R.C. Bansal 

R.L. Braga 

Rafael Araújo Rodrigues 

Rafael Carvalho Figueiredo 

Rafael D. C. Santos 

Rafael Krummenauer 

Rafael Martins Buck de Godoy 

Rafael Navet de Souza 

Rafael Pasquini 

Rafael Santos Mendes 

Rangel Arthur 

Rausley Adriano Amaral de Souza 

Regina Maria de Moraes 

Regina de Oliveira Moraes 

Reginaldo Palazzo Junior 

Reinaldo Wilson Vieira 

Renan Broska Amstrong 

Renan R.S. Lobo 

Renata Mataveli Viti 

Renato Alves Borges 

Renato Baldini Filho 

Renato da Rocha Lopes 

Ricardo Alves de Souza 

Ricardo Capitanio Martins da Silva 

Ricardo Coração de Leão Fontoura 

de Oliveira 

Ricardo Coêlho Silva 

Ricardo José Gabrielli Barreto 

Campello 

Ricardo Menezes Salgado 

Ricardo Oliveira 

Ricardo Paranhos Velloso Violato 

Ricardo Pureza Coimbra 


Ricardo Suyama 

Ricardo Torquato Borges 

Ricardo Wada 

Ricardo da Silva Souza 

Richard Middleton 

Robert H. Middleton 

Robert Shorten 

Roberto de Alencar Lotufo 

Roddy Elky Ramos Gonzales 

Rodolfo Manuel Moreno Martinez 

Rodolfo Oliveira 

Rodolfo da Silva Villaça 

Rodrigo Fernandes Vidigal 

Rodrigo Garcia-Valle 

Rodrigo Horikawa Watanabe 

Rodrigo Pasti 

Rodrigo Sanches Miani 

Rodrigo de Almeida Gonçalves 

Rogerio Valentim Gelamo 

Rogério Seiji Higa 

Romis Ribeiro de Faissol Attux 

Rosana Almada Bassani 

Rosangela Ballini 

Ruben Augusto Romero Lazaro 

Rubens H. Korogui 

Rubén Romero 

Rúbia Mara de Oliveira 

S 

S. Kong 

Stanislav Moshkalev 

Saide Jorge Calil 

Samuel Polato Ribas 

Secundino Soares Filho 

Selene Loibel 

Sergio Santos Muhlen 

Shusaburo Motoyama 

Sidarta Ribeiro 

Sidney Pinto da Cunha 


Silvio Renato Messias de Carvalho 

Silvio S. Segura 

Simon L. Cotton 

Sophie Tarbouriech 

Soraia Raupp Musse 

Stefano Faralli 

Sérgio Kurokawa 

Sérgio Pires Pimentel 

T 

Takaaki Ohishi 

Talía Simões dos Santos 

Tatiane Silvia Leite 

Taís Calliero Tognetti 

Thiago Henrique Gomes Silva 

Thienne de Melo e Silva Mesquita 

Johnson 

Tiago Agostinho de Almeida 

Tânia Basso 

U 

Ugo Silva Dias 


V 

V. Kumar 

Valentina Donzella 

Vanessa Testoni 

Veer P. S. Awana 

Vera Lucia da Silveira Nantes 

Button 

Veronica Toccafondo 

Vicente Idalberto Becerra Sablón 

Victor Baptista Frencl 

Vinicius Amaral Armentano 

Vinicius José Andrade Braga 

Vinícius Foletto Montagner 

Vitaly F. Rodríguez-Esquerre 

Vitor Afonso 

Vitor Baranauskas 

Vitor Bedotti Ribeiro 

Vitor Hugo Almeida Marques 

Vitor Vale Do Nascimento 

Vivaldo Fernando da Costa 

Vivian Cardoso de Morais Oliveira 

W 

Wagner Caradori do Amaral 

Walmir Matos Caminhas 

Walmir de Freitas Filho 

Walter Furloni 

Walter Wong 

Walter da Cunha Borelli 

Wellington Roque 

Wilfredo Jaime Puma Villanueva 

William Dias Belangero 

William G. Scanlon 

Wilsun Xu 

Wu Shin Ting 

Y 

Yannick Deville 

Yull Heilordt Henao Roa 

Yuzo Iano 

Z 

Z. Y. Dong 

Master in Science 

Listed below the names of our new Masters, that have received their grades from the FEEC master program in 2010. 

Adolfo Fernandes Herbster 

Alan Godoy Souza Mello 

Alessandro Camolesi 

Alex Pereira França 

Ana Carolina Silveira 

Anderson Wedderhoff Spengler 

André Filgueiras De Araujo 

André Körbes 

Beatriz de Lima Tavares 

Carlos Alberto Souto Junior 

Cecília Morais Quinzani 

Christian Medeiros Adriano 

Clausius Duque Gonçalves Reis 

Cristiano Roberto De Souza 

Cristina Wada 

Daniel Nascimento Duplat 

Danilo Basseto Do Valle 


Dherik Barison 

Eduardo De Souza Rosa 

Fábio Soares Rocha 

Felipe Marques Pires 

Fellipe Saldanha Garcia 

Fernanda Passos Dos Reis Ervilha 

Fernando Cardoso Fajoni 

Doctors 

Filipe de Oliveira Pereira 

Floriano Torres Neto 

Geraldo Ramos Falci Júnior 

Gilliard Nardel Malheiros Silveira 

Giovanni Curiel Dos Santos 

Greice Martins de Freitas 

Guilherme Silveira Rabelo 

Henri Shinichi de Souza Okajima 

Igor José Ferreira De Freitas 

Ismael Mattos Andrade Ávila 

Jakson Paulo Bonaldo 

Jânio Coutinho Canuto 

João Luiz Florio 


Jose Douglas Bertazzoni Zambianco 

José Erick de Souza Lima 

Jose Luis Azcue Puma 

Karinne Saraiva Da Silva. 

Levy Boccato 

Luciana Casacio 

Luis Fernando Caparroz Duarte 

Luis Rogério Gomes de Almeida 

Marcelo Richter Fernandez 


Marcus Pantoja Da Silva 

Maria Leopoldina Martins Neves 

Seixas Gonçalves 

Marina Tachibana 

Matheus Fernandes De Oliveira 


Nilsa Toyoko Azana 

Nínive Katarina Soares Carniato 

Patrícia Lopes Cavalcante 

Paulo César Magalhães Meira 

Paulo David Battaglin 

Rafael Carvalho Figueiredo 

Rafael Fontes Souto 

Rafael Martins Buck De Godoy 

Ramiro Roque Antunes Barreira 

Raquel Guerreiro Machado 

Renata Mataveli Viti 

Renato Maioli Castilho 

Ricardo Paranhos Velloso Violato 

Rodrigo Fernandes Vidigal 

Tania Basso 

Tiago Fernandes Tavares 

Tiago Rodarte Ricciardi 

Victor Baptista Frencl 

Listed below the names of our new Doctors, that have received their grades from the FEEC doctoral program in 2010. 

Adriano Luís Toazza 

Alexandre de Andrade 


Andréa Santos Leite Da Rocha 


Carlos Henrique Da Silva Santos 

Carlos Nazareth Motta Marins 

Christian Rodolfo Esteve 

Rothenberg 

Cresencio Silvio Segura Salas 

Eduardo Jorge Valadares Oliveira 

Fabrício Olivetti De França 

Grace Silva Deaecto 

Jacson Weber De Menezes 

Joni De Almeida Amorim 

Kleucio Claudio 

Leandro Bento Sena Marques 

Leandro Tiago Manera 

Leonardo Mendonça Oliveira de 

Queiroz 

Luís Henrique Sacchi 

Manish Sharma 

Marcelo Augusto Costa Fernandes 

Marcelo Gradella Villalva 

Marina Lavorato De Oliveira 


Paulo Victor De Oliveira Miguel 

Rafael de Almeida Ricardo 

Rodolfo Manuel Moreno Martinez 


Tiago Agostinho De Almeida 

Tomás Antônio Costa Badan 

Ugo Silva Dias 

Secretariat 

We thank FEEC staff members that helped us produce this volume of ―Sinopse da FEEC‖. Special thanks to Miss Gislaine 

Fernandes, for her patient article search on the web, to Mrs. Noemia da Silva Barros Benatti, for the insertion of thesis and 

dissertation data, and to all department secretaries, listed below, for their assistance. 

- Alaide da Silva Ramos (DECOM); 

- Ana Flavia da Silva (DT); 

- Carlos Eduardo Santos (DEB); 

- Carmen Aparecida Fonseca (DCA); 

- Cynthia Jazra Nakamura (DMO); 

- Ester Marçola Ferreira Mendes (DEMIC); 

- Giane Cristina Sales Geraldo (DMCSI); 

- Jaqueline Bisson E. Lopes (DSIF); 

- Juraci Soares de Souza (Diretoria); 

- Marcia Helena Gibim Fracaro (DENSIS); 

- Solange Espirito Santo de Souza(DSCE); 

- Suzete Terezinha de Freitas Zainum Nogueira 

(DSEE).

sinopseV3n3.pdf - FEEC - Unicamp

Create successful ePaper yourself

Delete template?

Save as template?