Technical Sessions – Monday July 11

4 - Submodular Optimization in Clustering Problems
Kiyohito Nagano, University of Tokyo, 1538505, Tokyo, Japan,
nagano@sat.t.u-tokyo.ac.jp
A number of objective functions in clustering problems can be described with
submodular functions. A submodular function is known to be a discrete analogue
of a convex function, and the discrete convexity enables us to develop
efficient algorithms. In this talk, I will discuss some clustering methods based
on submodular optimization techniques.
� MA-12
Monday, 11:30-13:00
Meeting Room 205
Trade and Development
Stream: Contributed Talks
Contributed session
Chair: Tatjana Tambovceva, Faculty of Engineering Economics and
Management, Riga Technical University, Mezha Street 1/7- 213,
LV-1048, Riga, Latvia, tatjana.tambovceva@rtu.lv
1 - The Co-existence of Diverse Medical Systems
Andrew Stranieri, School of Information Technology and
Mathematical Sciences, University of Ballarat, University Drive,
Mt. Helen, 3350, Ballarat, Victoria, Australia,
a.stranieri@ballarat.edu.au
The trend toward co-existence of medical systems including Western Medicine
and Traditional Chinese Medicine presents challenges that include the need for
models that facilitate the juxtaposition of reasoning from diverse systems, support
for patients in making informed choices, informatics initiatives including
the development of standards that accommodate all traditions, and regulatory
regimes that are not restricted to one tradition. In this article requisites for
the co-existence of diverse medical systems are described and implementations
that exemplify requisites are advanced.
2 - Peculiarities of the Property Tax Administration in
Latvia
Sanda Geipele, Riga Technical University, Mezha Street 1/7, 212
room, LV-1048, Riga, Afghanistan, sanda_geipele@inbox.lv
Property Tax is one of the most important tools of each state economics. Immovable
property tax is imposed upon land, buildings and building spaces utilized
for economic activity, except conditions stipulated by the law, as well as
starting with 2010 the tax was imposed upon dwelling houses and engineering
structures. The aim of the paper is to display peculiarities of the Property Tax
administration in Latvia. Author analyzes the importance of the present tax
in the state budget, problems of calculation of the tax and elaborates solutions
how to improve the Property Tax administration.
3 - Sustainable Construction in Latvia: Development and
Future Challenges
Tatjana Tambovceva, Faculty of Engineering Economics and
Management, Riga Technical University, Mezha Street 1/7- 213,
LV-1048, Riga, Latvia, tatjana.tambovceva@rtu.lv, Ineta
Geipele, Sanda Geipele
Sustainable construction has become very popular throughout the world. To
promote sustainable construction green building assessment tools have been
used. The purpose of study is to explore and analyze present status of sustainable
construction and green building assessment in Latvia and to indicate the
strategies of it development. The analysis shows that the effective way is to
choose an international tool as a basement and then make a custom-build tool
according to Latvian situation. And that the process of sustainable construction
in Latvia is in a progressive stage of introduction.
IFORS 2011 - Melbourne MA-14
� MA-13
Monday, 11:30-13:00
Meeting Room 206
Power, Control and Optimization
Stream: Continuous and Non-Smooth Optimization
Invited session
Chair: Nader Barsoum, Electrical Dept., Curtin University, Curtin
Campus, 98009, Miri, Sarawak, Malaysia, pcoglobal@gmail.com
Chair: Pandian Vasant, Electrical & Electronic Engineering Dept.,
University Technology Petronas, 31750 Tronoh, BSI, Perak, DR,
Malaysia, vasantglobal@gmail.com
Chair: Jeffrey Webb, School of Engineering and Science, Swinburne
University of Technology, Jalan Simpang Tiga, 93576, Kuching,
Sarawak, Malaysia, mailjeffwebb@yahoo.com
1 - Dynamic Programming for Optimal Allocation of Maintenance
Resources on Power Distribution Networks
Eduardo Tadeu Bacalhau, Densis, Unicamp, Campinas, Sao
Paulo, Brazil, dudubaca@yahoo.com.br, Fábio Usberti,
Christiano Lyra
Power distribution companies, in order to sustain predefined reliability indexes,
must have their network equipments go through a periodic maintenance. These
companies maintenance policies reflect the decision of which equipments will
undergo maintenance on a given planning horizon. This work uses a dynamic
programming based algorithm to minimize maintenance costs, subject to a
maximum System Average Interruption Frequency Index (SAIFI). The proposed
mathematical model considers a failure rate model, which predicts the
equipments failure rate depending on the maintenance schedule.
2 - A Multi-objective Model for the Planning and Optimisation
of Multinational Supply Chains
Behnam Fahimnia, School of Management, University of South
Australia, 29B Baird Street, 5095, Mawson Lakes, South
Australia, Australia, b_fahimnia@yahoo.com, Mark Goh, Asef
Nazari, Ali Eshragh Jahromi
Scanty literature exists addressing the planning of multinational supply chains
in which products are produced in local and foreign manufacturing/assembly
plants and distributed to international markets in different counties. This study
develops a unified optimisation model for the optimal planning of a complex
multinational supply chain. The proposed model minimises the summation of
production/assembly costs, distribution costs, tariff costs and exchange costs.
The solution for the proposed integrated problem is sought comparing the performance
of two different solution approaches.
3 - Future Energy and Desirable Automation for Global Optimal
Nader Barsoum, Electrical Dept., Curtin University, Curtin
Campus, 98009, Miri, Sarawak, Malaysia,
pcoglobal@gmail.com
Energy mix is now recognized to be developed in future as a replacement of fossil
fuel or oil. This is a hybrid power between nuclear and renewable energy,
including solar, wind and hydraulic. Design of solar tracker is now essential to
develop for better energy efficiency. This includes controller for sensitive drives
to have the optimum power at all times globally. Our session will show the recent
and new research outcomes on the optimum energy and global automation
including computational intelligent, smart drives, constraint programming and
stochastic optimization.
� MA-14
Monday, 11:30-13:00
Meeting Room 207
Variational Analysis
Stream: Continuous and Non-Smooth Optimization
Invited session
Chair: Alexander Kruger, Graduate School of Information
Technology & Mathematical Sciences, University of Ballarat,
University Drive, Mount Helen, P.O. Box 663, 3353, Ballarat,
Victoria, Australia, a.kruger@ballarat.edu.au
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