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International Parallel and Distributed Processing Symposium, IPDPS 2003

作者： Kikuchi, Hideaki Kalia, Rajiv K. Nakano, Aiichiro Vashishta, Priya Shimojo, Fuyuki Saini, Subhash Collaboratory for Multiscale Simulations Department of Computer Science Department of Physics and Astronomy Department of Materials Science Department of Biomedical Engineering University of Southern California Los AngelesCA90089 United States Concurrent Computing Laboratory for Materials Simulations Biological Computation and Visualization Center Department of Computer Science Department of Physics and Astronomy Louisiana State University Baton RougeLA70803 United States Faculty of Integrated Arts and Sciences Hiroshima University Higashi-Hiroshima739-8521 Japan IT Modeling and Simulation NASA Ames Research Center Moffett FieldCA94035 United States

ISBN: (纸本)0769519261

Scalability of a low-cost, Intel Xeon-based, multi-Teraflop Linux cluster is tested for two high-end scientific applications: Classical atomistic simulation based on the molecular dynamics method and quantum mechanical calculation based on the density functional theory. These scalable parallel applications use spacetime multiresolution algorithms and feature computational-space decomposition, wavelet-based adaptive load balancing, and spacefilling-curve-based data compression for scalable I/O. Comparative performance tests are performed on a 1024-processor Linux cluster and a conventional higher-end parallel supercomputer, 1184-processor IBM SP4. The results show that the performance of the Linux cluster is comparable to that of the SP4. We also study various effects, such as the sharing of memory and L2 cache among processors, on the performance. © 2003 IEEE.

关键词： Scalability

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Semiconductor supply network simulation

Semiconductor supply network simulation

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simulation Winter Conference

作者： Godding Sarjoughian Kempf Component Automation Systems Intel Corporation Chandler AZ USA Arizona Center for Integrative Modeling & Simulation Computer Science & Engineering Department Arizona State University Tempe AZ USA Decision Technologies Intel Corporation Chandler AZ USA

More efficient and effective control of supply networks is conservatively worth billions of dollars to the national and world economy. Developing improved control requires simulation of physical flows of materials involved and decision policies governing these flows. We describe our initial work on modelling each of these flows as well as simulating their integration through the synchronized interchange of data. We show the level of abstraction that is appropriate, formulate and test a representative model, and describe our findings and conclusions.

关键词： Testing Production facilities Computational modeling Raw materials Customer service Costs Material storage Network topology Scalability Automation

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Scalability of a low-cost multi-Teraflop Linux cluster for high-end classical atomistic and quantum mechanical simulations

Scalability of a low-cost multi-Teraflop Linux cluster for h...

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International Symposium on Parallel and Distributed Processing (IPDPS)

作者： H. Kikuchi R.K. Kalia A. Nakano P. Vashishta F. Shimojo S. Saini Concurrent Computing Laboratory for Materials Simulations Biological Computation and Visualization Center Department of Computer Science Department of Physics & Astronomy Louisiana State University Baton Rouge LA USA Collaboratory for Multiscale Simulations Department of Computer Science Department of Physics & Astronomy Department of Materials Science Department of Biomedical Engineering University of Southern California Los Angeles CA USA Faculty of Integrated Arts and Sciences Hiroshima University Higashi Hiroshima Japan IT Modeling and Simulation NASA Ames Research Center Moffett Field CA USA

关键词： Scalability Linux Quantum mechanics Computational modeling Testing Density functional theory Clustering algorithms Concurrent computing High performance computing Load management

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Human systems integration and advanced technology in engineering department workload and manpower reduction

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NAVAL ENGINEERS JOURNAL 2003年第1期115卷 57-65页

作者： Lively, KA Seman, AJ Kirkpatrick, M KENNETH A. LIVELY graduated from the University of Colorado with a BS in applied mathematics and an MS in mathematics in 1976 and from the Massachusetts Institute of Technology with an MS in electrical engineering and the degree ocean engineer in naval architecture and marine engineering in 1984. He retired from the U.S. Navy in 1989 after 23 years of service. Assignments included electrical officer on the USS Constellation (CV 64) project engineer for the DDG 51 machinery control system (NAVSEA) and DDG 51 Technical Director (NAVSEA). He was vice president of the PDI Division of Bird-Johnson Company from July 1989 to November 1998 where he managed various gas turbine and machinery controls related development projects. He joined Anteon Corporation's Systems Engineering Group as senior controls engineer in December 1998 where he provided technical support to the integrated power systems program (NAVSEA PMS 510) and managed the Office of Naval Research Afloat Laboratory. DR. MARK KIRKPATRICK is currently an independent consultant in human factors and work-load/manning analysis and modeling. He holds a Ph.D. degree in experimental psychology from The Ohio State University and has 34 years of experience in applied human factors. From 1982 through 2000 Dr. Kirkpatrick served as the senior vice president of Carlow International. Prior to joining Carlow in 1982 Dr. Kirkpatrick served as a member of the technical staff at North American Rockwell's Missiles Division and as a project director and vice president for Essex Corporation. His areas of expertise include workload simulation task analysis operator-in-the-loop simulation human performance experimentation statistical analysis and human factors T&E. He has directed and/or participated in human factors projects for the U.S. Navy U.S. Army NASA Department of Transportation the U.S. Nuclear Regulatory Commission and private industry. ANTHONY J. SEMAN III is the technical manager for the reduced ship's crew by virtual presence (RSVP) advanced technology d

Aboard current ships, such as the DDG 51, engineering control and damage control activities are manpower intensive. It is anticipated that, for future combatants, the workload demand arising from operation of systems under conditions of normal steaming and during casualty response will need to be markedly reduced via automated monitoring, autonomous control, and other technology initiatives. Current DDG 51 class ships can be considered as a manpower baseline and under Condition III typical engineering control involves seven to eight watchstanders at manned stations in the Central Control Station, the engine rooms and other machinery spaces. In contrast to this manning level, initiatives such as DD 21 and the integrated engineering plant (IEP) envision a partnership between the operator and the automation system, with more and more of the operator's functions being shifted to the automation system as manning levels decrease. This paper describes some human systems integration studies of workload demand reduction and, consequently, manning reduction that can be achieved due to application of several advanced technology concepts. Advanced system concept studies in relation to workload demand are described and reviewed including. Piecemeal applications of diverse automation and remote control technology concepts to selected high driver tasks in current DDG 51 activities. Development of the reduced ship's crew by virtual presence system that will provide automated monitoring and display to operators of machinery health, compartment conditions, and personnel health. The IEP envisions the machinery control system as a provider of resources that are used by various consumers around the ship. Resource needs and consumer priorities are at all times dependent upon the ship's current mission and the availability of equipment pawnbrokers.

关键词： Naval warfare

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Representing and parameterizing agent behaviors

Representing and parameterizing agent behaviors

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computer Animation

作者： N. Badler J. Allbeck Liwei Zhao M. Byun Center for Human Modeling and Simulation Computer and Information Science University of Pennsylvania Philadelphia PA USA

The last few years have seen great maturation in understanding how to use computer graphics technology to portray 3D embodied characters or virtual humans. Unlike the off-line, animator-intensive methods used in the special effects industry, real-time embodied agents are expected to exist and interact with us "live." They can be represent other people or function as autonomous helpers, teammates, or tutors enabling novel interactive educational and training applications. We should be able to interact and communicate with them through modalities we already use, such as language, facial expressions, and gesture. Various aspects and issues in real-time virtual humans will be discussed, including consistent parameterizations for gesture and facial actions using movement observation principles, and the representational basis for character believability, personality, and affect. We also describe a Parameterized Action Representation (PAR) that allows an agent to act, plan, and reason about its actions or actions of others. Besides embodying the semantics of human action, the PAR is designed for building future behaviors into autonomous agents and controlling the animation parameters that portray personality, mood, and affect in an embodied agent.

关键词： Animation Humans Autonomous agents Computational modeling computer simulation Information science computer graphics Industrial training Buildings Mood

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Using a software architecture description language to model the architecture and run-time performance of a federate

Using a software architecture description language to model ...

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International Workshop/Symposium on Distributed simulation and Real-Time Applications (DS-RT)

作者： M.D. Petty F.D. McKenzie Qingwen Xu Virginia Modeling Analysis & Simulation Center Old Dominion University Suffolk VA USA Electrical and Computer Engineering Old Dominion University Norfolk VA USA

Software architecture is high-level software design, dealing with the structure and organization of software systems. A software architecture is defined in terms of computational components and interactions among those components. Architecture description languages (ADLs) represent architecture-level software designs. Different ADLs often have different intents; e.g., Rapide supports architecture simulation and Acme is intended to be both an ADL and an ADL interchange format. Experimental applications of two ADLs were conducted to determine the effectiveness of ADLs for architecture-level analysis of simulation systems; one of them is reported. Acme was used to model the architecture of ModSAF and to analyze its run-time performance. The model was used to analyze execution time at the component and federate levels and to estimate the maximum number of internal and external simulation entities that could be supported by the ModSAF architecture. The experiment showed that ADLs could model important features of simulation system architectures.

关键词： Software architecture computer architecture Runtime Software design Analytical models Software systems Architecture description languages Computational modeling Application software Performance analysis

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VRML clients linked through concurrent chat

VRML clients linked through concurrent chat

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simulation Winter Conference

作者： L.A. Belfore S. Battula Department of Electrical and Computer Engineering Virginia Modeling Analysis and Simulation Center Old Dominion University Norfolk VA USA Ynot Team Inc. VA USA

Internet based virtual reality offers the opportunity to render content in three dimensions. In addition, the Internet provides a medium to support collaborative activities. In this work, we describe how collaborative capabilities are integrated into the Interactive Land use VRML Application (ILUVA). ILUVA is a VRML based application that supports highly interactive functionality, live updates, and the dynamic generation of VRML content. The collaborative functions have been added in the context of an Internet chat session in which multiple users may participate from the Internet. In addition to the usual functions supported by chat applications, user information sharing is supported. The union or intersection of sessions from different users may be produced and reviewed in the world.

关键词： Internet Collaborative work Collaboration Geographic Information Systems Computational modeling Analytical models computer simulation Virtual reality Fabrics Business communication

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Formational parameters and adaptive prototype instantiation for MPEG-4 compliant gesture synthesis

Formational parameters and adaptive prototype instantiation ...

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computer Animation

作者： B. Hartmann M. Mancini C. Pelachaud Center for Human Modeling and Simulation University of Pennsylvania Australia Department of Computer and System Science University of Rome E2809CLa SapienzaE2809D Italy

This paper introduces Gesture Engine, an animation system that synthesizes human gesturing behaviors from augmented conversation transcripts using a database of highlevel gesture definitions. An abstract scripting language to specify hand-arm gestures is introduced that incorporates knowledge from sign language research, psycholinguistics, and traditional keyframe animation. A new planning algorithm instantiates and adjusts gestures according to communicative context and temporal constraints obtained from a speech synthesizer The system animates an MPEG-4 compliant skeleton using Body Animation Parameters.

关键词： Prototypes Animation Engines Humans Databases Handicapped aids Psychology Context Speech synthesis Synthesizers

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Scalable atomistic simulation algorithms for materials research

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Scientific Programming 2002年第4期10卷 263-270页

作者： Nakano, Aiichiro Kalia, Rajiv K. Vashishta, Priya Campbell, Timothy J. Ogata, Shuji Shimojo, Fuyuki Saini, Subhash Department of Computer Science Dept. of Mat. Sci. and Engineering University of Southern California Los Angeles CA 90089 United States Concurrent Computing Lab. for MS Biol. Comp. and Visualization Center Louisiana State University Baton Rouge LA 70803 United States Department of Applied Sciences Yamaguchi University Ube 755-8611 Japan Faculty of Integrated Arts and Sci. Hiroshima University Higashi-Hiroshima 739-0046 Japan IT Modeling and Simulation NASA Ames Research Center Moffett Field CA 94035-1000 United States

A suite of scalable atomistic simulation programs has been developed for materials research based on space-time multiresolution algorithms. Design and analysis of parallel algorithms are presented for molecular dynamics (MD) simulations and quantum-mechanical (QM) calculations based on the density functional theory. Performance tests have been carried out on 1,088-processor Cray T3E and 1,280-processor IBM SP3 computers. The linear-scaling algorithms have enabled 6.44-billion-atom MD and 111,000-atom QM calculations on 1,024 SP3 processors with parallel efficiency well over 90%. The production-quality programs also feature wavelet-based computational-space decomposition for adaptive load balancing, spacefilling-curve-based adaptive data compression with user-defined error bound for scalable I/O, and octree-based fast visibility culling for immersive and interactive visualization of massive simulation data.

关键词： Parallel algorithms

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Interacting with Visible Human data using an ImmersaDesk

Interacting with Visible Human data using an ImmersaDesk

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IEEE Annual International Symposium Virtual Reality

作者： Ching-Yao Lin D.T. Chen R.B. Loftin Jian Chen E.L. Leiss Department of Computer Science University of Houston Houston TX USA Office of High Performance Computing and Communication National Library of Medicine Bethesda MD USA Virginia Modeling & Simulation Center Old Dominion University Suffolk VA USA

ISBN: (纸本)0769514928

Interaction with medical volume data has often been difficult, due to the large memory and computational power required. By taking advantage of current high-end graphics hardware, we have developed a volumetric virtual environment that provides the ability to help people interact with the volumetric Visible Human data set. The application enables the user to explore the interior of a virtual human body in a natural and intuitive way.

关键词： Humans Biomedical imaging Virtual reality Displays Hardware Surgery Image segmentation Thorax High performance computing Libraries

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