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estimators, and investigate the effectiveness of various combinations of the partial derivative estimates in detecting blurred steps and lines. We also touch briefly on the problem of sensitivity to various types of edge structures, and develop an isotropic operator with reduced sensitivity to isolated spikes. Author Edge Detection; Differential Equations 20060001721 Oklahoma State Univ., Stillwater, OK, USA CARMA Model Methods of Two-Dimensional Shape Classification: An Eigensystem Approach vs. the LP Norm Malakooti, Mohammad V.; Teague, Keith A.; IEEE International Conference on Acoustics, Speech, and Signal Processing (ICASSP ‘87); Volume 1; 1987, pp. 583-586; In English; See also 20060001583; Copyright; Avail.: Other Sources Because of periodicity of the time series derived from the N angularly equispaced radii, the correlation matrix has an invariant feature under rotation, translation, and scaling. The periodic characteristics possessed by the time series can be utilized to obtain improvement for texture boundary detection. A new circular ARMA (CARMA) model is introduced to represent the time series obtained for shape classification. This model is compared with a regular ARMA model and its high resolution and accuracy is tested for several two dimensional objects. Singular value decomposition (SVD) is used to calculate the insensitive features for shape classification and boundary reconstruction. The invariant right singular vectors of the correlation matrix are used as an orthogonal basis for the solution space. The dimension of the spanned space (model order) is calculated from a new nullity algorithm. To show the high resolution of the eigensystem approach, L(sub 1) and classical L(sub 2) solutions are compared. Author Algorithms; Shapes; Two Dimensional Models; Eigenvectors 20060001802 NorthWest Research Associates, Inc., Bellevue, WA USA Laboratory and Numerical Studies of the Effects of Shear on 3-D Vortex Evolution Delisi, Donald P.; Robins, Robert E.; Aug. 17, 2005; 45 pp.; In English; Original contains color illustrations Contract(s)/Grant(s): N00014-01-C-0316 Report No.(s): AD-A440279; NWRA-BECR-05-R305; No Copyright; Avail.: CASI: A03, Hardcopy This report documents the results of ONR Contract N00014-01-C-0316. The goal of this study was to begin to understand the effects of vertical shear on the evolution of a vortex pair. Vorticity is always generated from a three-dimensional lifting surface. Behind this surface, the vorticity typically rolls up quickly into a pair of counter-rotating vortices. Since vortices transport mass and momentum, their evolution and persistence are important in naval hydrodynamics. DTIC Numerical Analysis; Shear Properties; Vortices 20060001803 Massachusetts Univ., Amherst, MA USA Intrinsically Motivated Reinforcement Learning Singh, Satinder; Barto, Andrew G.; Chentanez, Nuttapong; Jan. 1, 2005; 9 pp.; In English; Original contains color illustrations Report No.(s): AD-A440280; No Copyright; Avail.: Defense Technical Information Center (DTIC) Psychologists call behavior intrinsically motivated when it is engaged in for its own sake rather than as a step toward solving a specific problem of clear practical value. But what we learn during intrinsically motivated behavior is essential for our development as competent autonomous entities able to efficiently solve a wide range of practical problems as they arise. In this paper we present initial results from a computational study of intrinsically motivated reinforcement learning aimed at allowing artificial agents to construct and extend hierarchies of reusable skills that are needed for competent autonomy. DTIC Learning; Problem Solving 20060001822 Maryland Univ., College Park, MD USA A Novel Non-Orthogonal Joint Diagonalization Cost Function for ICA Afsari, Bijan; Krishnaprasad, P. S.; Jan. 1, 2005; 14 pp.; In English Contract(s)/Grant(s): DAAD19-01-1-0465 Report No.(s): AD-A440311; ISR-TR-2005-106; No Copyright; Avail.: Defense Technical Information Center (DTIC) We present a new scale-invariant cost function for non-orthogonal joint-diagonalization of a set of symmetric matrices with application to Independent Component Analysis (ICA). We derive two gradient minimization schemes to minimize this 166
cost function. We also consider their performance in the context of an ICA algorithm based on non-orthogonal joint diagonalization. DTIC Cost Estimates; Costs 20060001851 International Business Machines Corp., Yorktown Heights, NY USA Recursive Array Layouts and Fast Matrix Multiplication Chatterjee, Siddhartha; Lebeck, Alvin R.; Patnala, Praveen K.; Thottehodi, Mithuna; Jan. 1, 2005; 50 pp.; In English; Original contains color illustrations Contract(s)/Grant(s): DABT63-98-1-0001 Report No.(s): AD-A440384; No Copyright; Avail.: Defense Technical Information Center (DTIC) The performance of both serial and parallel implementations of matrix multiplication is highly sensitive to memory system behavior. False sharing and cache conflicts cause traditional column-major or row-major array layouts to incur high variability in memory system performance as matrix size varies. This paper investigates the use of recursive array layouts to improve performance and reduce variability. Previous work on recursive matrix multiplication is extended to examine several recursive array layouts and three recursive algorithms: standard matrix multiplication, and the more complex algorithms of Strassen and Winograd. While recursive layouts significantly outperform traditional layouts (reducing execution times by a factor of 1.2-2.5) for the standard algorithm, they offer little improvement for Strassen’s and Winograd’s algorithms. For a purely sequential implementation, it is possible to reorder computation to conserve memory space and improve performance between 10% and 20%. Carrying the recursive layout down to the level of individual matrix elements is shown to be counter-productive; a combination of recursive layouts down to canonically ordered matrix tiles instead yields higher performance. Five recursive layouts with successively increasing complexity of address computation are evaluated, and it is shown that addressing overheads can be kept in control even for the most computationally demanding of these layouts. DTIC Architecture (Computers); Computer Storage Devices; Layouts; Matrices (Mathematics); Multiplication; Recursive Functions 20060001879 Washington State Univ., Pullman, WA USA Numerical Studies of Acoustic Propagation in Shallow Water Schneider, John B.; Nov. 13, 2005; 7 pp.; In English Contract(s)/Grant(s): N00014-96-1-0790 Report No.(s): AD-A440431; No Copyright; Avail.: CASI: A02, Hardcopy Equations were derived which rigorously codify the propagation of fields in finite-difference time-domain (FDTD) grids. These equations were then used to construct a perfect total-field/scattered field boundary (which is used to inject energy into the grid). Algorithms were developed to enhance the modeling of material boundaries in the FDTD method; the accuracy of various FDTD or FDTD-like algorithms were rigorously studied; an FDTD algorithm was developed which is theoretically exact (i.e., provided the grid is infinite the accuracy is limited only by the finite precision of computers); various computer programs related to the FDTD method were written; and information and programs were disseminated via journal publications, conference presentations, and the Web. DTIC Acoustic Propagation; Acoustics; Differential Equations; Finite Difference Theory; Shallow Water 20060001928 Uniformed Services Univ. of the Health Sciences, Bethesda, MD USA Chemical Vapor Identification Using Field-Based Attenuated Total Reflectance Fourier Transform Infrared Detection and Solid Phase Microextraction Bryant, Chet K.; Jun. 9, 2004; 111 pp.; In English; Original contains color illustrations Report No.(s): AD-A440604; No Copyright; Avail.: Defense Technical Information Center (DTIC) Attenuated total reflectance Fourier transform infrared (ATR-FTIR) technology is used to identify chemicals in a liquid or solid phase but not in a vapor phase. This research identified vapor phase chemicals using a field-portable ATR-FTIR spectrometer combined with a solid phase microextraction (SPME) film. Two nerve agent simulants, diisopropyl methylphosphonate (DIMP) and dimethyl methylphosphonate (DMMP), and three polycarbosiloxane polymers were evaluated using a TravelIR ATR-FTIR instrument. An SPME film was adhered to the TravelIR sampling interface to extract and concentrate vapors to be identified by the TravelIR. The lowest air concentration identified was 50 ppb DIMP and 250 ppb DMMP. A remote sampling technique where SPME films were exposed to vapors and then transferred to the TravelIR 167
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Since its founding, NASA has been d
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NASA STI Availability Information N
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Life Sciences 51 Life Sciences (Gen
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Microstructure Fabrication and Perf
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RNP SAAAR procedures have been prop
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concept was originally developed to
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appropriate information in the righ
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preceding aircraft. The proposed DE
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Workshop; November 2005; 31 pp.; In
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20060002288 Johns Hopkins Univ., La
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Workshop; November 2005, pp. 1-19;
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aircraft would then vary its broadc
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20060001772 Northrop Grumman Corp.,
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seedling effort, Metron has been aw
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aircraft ‘streaming’ that impli
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implantation of analog-to-digital c
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12 percent; Denver, Kennedy and Orl
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maneuver is along or opposite the v
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18 SPACECRAFT DESIGN, TESTING AND P
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High-Level Waste Workshop held on J
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detectors, but 50 seconds slower th
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computed to shed light on the feasi
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have to be satisfied. Usually, an i
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desired speech with better intellig
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noise is not required. Simulation e
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we present a series of lessons lear
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eceived instantaneous power level h
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integration of these highly integra
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The scheme is based on the harmonic
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A family of Quantized State (QS) ad
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atios. It is also used in a speech
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In AM radio it is of interest to in
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We define a piecewise AR model for
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the far domain eliminates scan time
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Fault Diagnosis of Piecewise-Linear
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20060002115 Iowa Univ., Iowa City,
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applications requiring wide dynamic
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attractive media for meeting the co
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20060002148 American Telephone and
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are considered and modeled as an un
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the program executes at least 100 t
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with low precision components, and
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20060002295 Pennsylvania State Univ
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losses, and boundary layer velocity
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object. The goal of this paper is t
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20060001640 General Electric Co., S
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The Advanced Volume Sensor Project
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20060001813 Michigan Univ., Ann Arb
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demonstrate that operations perform
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context of how Army installations n
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13.4% on a non-textured single-side
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ilayer structure, the DLC films not
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operating information, and a black-
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46 GEOPHYSICS Includes Earth struct
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20060002033 National War Coll., Was
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esults of this study indicate that
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Bacillus anthracis. Anthrax will be
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were evaluated throughout the exper
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20060001236 Institute of Space Medi
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20060001245 Institute of Space Medi
Page 122 and 123: III dummy was similar to those obta
Page 124 and 125: properties of hyperbolic Dirichlet
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Page 128 and 129: 20060002350 BERG2 Micro-Computer Es
Page 130 and 131: Exploratory Learning; Neurobiologic
Page 132 and 133: operation of LSI is pursuited to ac
Page 134 and 135: industrial tools, and increased int
Page 136 and 137: 20060001694 Motorola, Inc., Schaumb
Page 138 and 139: enchmarks in this document is meant
Page 140 and 141: contemporary team theory, adapted a
Page 142 and 143: toolkit), each of which we built to
Page 144 and 145: developmental effort. This paper il
Page 146 and 147: signal-processing algorithms, allow
Page 148 and 149: Scheduling (TIES) for efficient net
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Page 152 and 153: 20060001877 New York Univ., New Yor
Page 154 and 155: domain. dRBAC utilizes PKI to ident
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Page 178 and 179: 65 STATISTICS AND PROBABILITY Inclu
Page 180 and 181: A new approach to making voiced/unv
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Page 184 and 185: non-linear system design. Finally,
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Page 190 and 191: 20060001806 North Carolina State Un
Page 192 and 193: ate of the Booster, and provide a l
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Page 196 and 197: 20060002069 Fermi National Accelera
Page 200 and 201: micrographs as triangular and trape
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Page 206 and 207: 20060002468 Lawrence Livermore Nati
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Page 210 and 211: parameters and propose some importa
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Page 216 and 217: 20060001730 Naval Underwater System
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specifications automatically. Some
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discrimination information (or the
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matching algorithm is proposed for
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20060001768 Naval Postgraduate Scho
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20060001826 Massachusetts Univ., Am
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allows the user to specify a contex
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information from these resources, u
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such as ADSL and FTTH, we are now a
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Presented is the National Optical A
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20060000076 Gemini Observatory, Hil
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Telescope (HST) at optical waveleng
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Misadjustment Expressions for Infin
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A-4 Complexity Reduced Lattice Filt
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ASYMMETRY Anthrax Biosensor, Protec
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Regulation of hTERT Expression and
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CLIMATE C-Haendelser i Vinterklimat
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Neutronics Assessments for a RIA Fr
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CRYSTAL SURFACES High-Throughput Ap
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DIELECTRICS Theoretical and Experim
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Analysis of Depletion-Region Collec
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Scenario Customization for Informat
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GALLIUM ARSENIDES InGaAs/GaAs QD Su
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HUMAN RESOURCES The Management of P
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INFRARED SPECTRA Chemical Vapor Ide
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Adaptive Transversal Filters with D
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MATCHED FILTERS Simplified Class 1
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MILITARY TECHNOLOGY The USA Air For
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NONLINEAR FILTERS A Novel Approach
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Object Classification and Registrat
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Predicting Ductile Crack Growth in
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RECURSIVE FUNCTIONS Recursive Array
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Texture Segmentation Using a Class
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SITUATIONAL AWARENESS Aspects of Sh
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STABILITY Damping Transverse Instab
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Single Target Spin Asymmetries and
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On Generalized Feussner’s Princip
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WEAR Wear Prediction of Strip Seals
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Anderson, Robert H. The Vulnerabili
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Neutronics Assessments for a RIA Fr
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Chien, Ting-Li Navigation of a Mobi
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The Modeling and Segmentation of Sp
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Fomin, Pavel Test and Evaluation of
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Hann, P. R. Technical Equivalency D
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Irons, F. H. A Phase-Plane Approach
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Kawarada, Hiroshi A Hierarchical Re
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Lai, Feipei JADE: A Hierarchical Sw
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Lopez-Perez, Javier VHF Channel Occ
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Menard, J. Scaling of Kinetic Insta
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Ney, Hermann Dynamic Programming Sp
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Using Rhythms of Relationships to U
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Resch, C. Communications Technology
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Sedra, A. S. SlCOMP: A Silicon Comp
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Steffler, E. D. Predicting Ductile
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Torkelson, Mats A VLSI Sigma-Delta
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Wheeler, P. D. Practical Adaptive N
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Zong-ye, Wang Application of Multis
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