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simulation Winter Conference

作者： L. Yilmaz T.I. Oren Auburn Modeling & Simulation Laboratory Department of Computer Science and Engineering Aubum University Auburn AL USA Ottawa Center of the MISS School of Information Technology and Engineering SITE University of Ottawa Ottawa ONT Canada

Federated simulations address the need for interoperability, as well as the improvement of reuse and composability. The focal goal in a federated simulation is to facilitate composable simulations by standardizing interfaces to assure technical interoperability among disparate simulations. Yet, existing federated simulation infrastructures neither facilitate substantive interoperability nor are dynamically extensible. Emergent Web services technologies hold out the potential to significantly improve the development of interoperable, extensible, and dynamically composable federations. As such, recent initiatives (i.e., XMSF) are urging the use of open standards that can be applied within an extensible framework for next generation modeling and simulation applications. We discuss how the realization of multimodel and multisimulation formalisms in terms of semantic Web and agent technologies may bring new vistas to demonstrate runtime model discovery, instantiation, composition, and interoperation.

关键词： Semantic Web Runtime Ontologies Computational modeling computer simulation Microstrip Service oriented architecture Laboratories computer science Information technology

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Behavioral anticipation in agent simulation

Behavioral anticipation in agent simulation

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simulation Winter Conference

作者： T.I. Oren L. Yilmaz Ottawa Center of the MISS School of Information Technology and Engineering (SITE) University of Ottawa Ottawa ONT Canada Auburn Modeling & Simulation Laboratory Department of Computer Science and Engineering Aubum University Auburn AL USA

In this article, the following is done: (1) a systematic and comprehensive classification of input is given and the relevance of perception as an important type of input in intelligent systems is pointed out, (2) a categorization of perception is given and anticipation is presented as a type of perception, (3) the inclusion of anticipation in simulation studies is clarified and other aspects of perceptions in simulation studies especially in conflict situations are elaborated.

关键词： Character generation Predictive models Message passing Sensor fusion Computational modeling computer simulation Organisms Decoding Digital filters Passive filters

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SCIRun/BioPSE: integrated problem solving environment for bioelectric field problems and visualization

SCIRun/BioPSE: integrated problem solving environment for bi...

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IEEE International Symposium on Biomedical Imaging

作者： R.S. MacLeod O.M. Weinstein J. Davison de St Germain D.H. Brooks C.R. Johnson S.G. Parker Scientific Computing and Imaging Institute University of Utah Salt Lake UT USA Department of Electrical and Computer Engineering Northeastern University Boston MA USA Center for Bioelectric Field Modeling Simulation and Visualization NIH/NCRR

SCIRun is a general purpose problem solving environment that seeks to integrate the steps of preparing, executing, and visualizing simulations of physical and biological systems. The implementation of SCIRun is by means of an interactive dataflow network consisting of modules and data pipes exposed as a visual programming language. SCIRun also contains specific modules for bioelectric field simulations and visualizations and the combination of SCIRun with this package is known as BioPSE (***/software/biopse). This software has been in the public domain since 2000 and in that time we have developed strategies for software development, engineering, testing, documentation, and training. We have also continued to expand the scope of the SCIRun/BioPSE package not only through our own codes but by constructing bridges to other systems, both open source and proprietary. We have also created a repository for relevant sample networks and datasets with the aim of allowing diverse groups to test and evaluate algorithms using identical data and to share their results with the community for comparison of performance and accuracy. We present here a summary of the software system and describe specific experiences and conclusions with regard to creating and managing a large open source software project carried out within a university setting.

关键词： Biopsy Problem-solving Bioelectric phenomena Data visualization Biological system modeling Packaging Biological systems computer languages Software packages Programming

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Multi-formalism modeling approach for semiconductor supply/demand networks 04

Multi-formalism modeling approach for semiconductor supply/d...

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simulation Winter Conference

作者： G.W. Godding H.S. Sarjoughian K.G. 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

ISBN: (纸本)9780780387867

Building computational models of real world systems usually requires the interaction of decision modules and simulation modules. Given different models and algorithms, the major hurdles in building a principled and robust system are model composibility and algorithm interoperability. We describe an approach to the composibility problem including initial results. This exposition is given in the context of linear programming as the decision technique and discrete event simulation as the simulation technique, both applied to the design and operation of semiconductor supply/demand networks.

关键词： Computational modeling Decision making Semiconductor materials Robustness Discrete event simulation Context modeling Engines Production facilities Buildings Linear programming

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A unified view of time and causality and its application to distributed simulation

A unified view of time and causality and its application to ...

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2003 Summer computer simulation Conference, SCSC 2003

作者： Nutaro, James J. Sarjoughian, Hessam S. Arizona Center for Integrative Modeling and Simulation Electrical and Computer Engineering Department University of Arizona TucsonAZ85721-0104 United States Arizona Center for Integrative Modeling and Simulation Computer Science and Engineering Department Arizona State University TempeAZ85287-5406 United States

ISBN: (纸本)1565552687

This paper presents a framework for distributed simulation that is based on system-theoretic and logical-process concepts. The framework describes a three-part world-view for developing simulation models. These are modeling formalisms, abstract simulators, and computational environments. A unified view of time and causality allows for the application of system-theoretic notions of causality within a distributed simulation environment. Within this framework, we introduce a unified notion of causality. Further we describe an approach for developing distributed simulation models which evolve from modeling constructs to simulation algorithms and their implementations. The framework is exemplified using the Discrete EVent System Specification (DEVS) modeling formalism, its abstract simulator, and a parallel algorithm that implements the abstract simulator.

关键词： Specifications

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Predictive quantization-based filtering in distributed traffic simulation

Predictive quantization-based filtering in distributed traff...

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2003 Summer computer simulation Conference, SCSC 2003

作者： Leer, Jongkeun Chit, Sungdo Zeigler, Bernard P. Arizona Center for Integrative Modeling and Simulation Dept. of Electrical and Computer Engineering University of Arizona TucsonAZ85721 United States Intelligent Systems Research Lab. Dept. of Computer Engineering Hangkong University Seoul Korea Republic of

ISBN: (纸本)1565552687

This paper proposed predictive quantization-hased filtering method that uses average speed-based dynamic quantum size to effectively reduce communication overhead that DEVS/HLA-based distributed traffic simulation has. Average speed-based dynamic quantum size monitors dynamically changing road situation at fixed time unit and set vehicles 'average speed to dynamic quantum size. Then it generates individual quantum size offactors such as the distance from the leading vehicle, speed and acceleration that decide traffic models 'behavior by using dynamic quantum size. Therefore, the suggested methodology has an advantage in that it effectively reduces communication overhead among federates of distributed traffic simulation. This paper verified validity of the suggested method by doing distributed modeling the 32km block from East Seoul to Hobup of JOOJ'/GBOO highway in Korea and analyzing the simulation.

关键词： Cost reduction

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Real-time reach planning for animated characters using hardware acceleration

Real-time reach planning for animated characters using hardw...

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computer Animation

作者： Ying Liu N.I. Badler Center for Human Modeling and Simulation Department of Computer and Information Science University of Pennsylvania USA

We present a heuristic-based real-time reach planning algorithm for virtual human figures. Given the start and goal positions in a 3D workspace, our problem is to compute a collision-free path that specifies all the configurations for a human arm to move from the start to the goal. Our algorithm consists of three modules: spatial search, inverse kinematics, and collision detection. For the search module, instead of searching in joint configuration space like most existing motion planning methods do, we run a direct search in the workspace, guided by a heuristic distance-to-goal evaluation function. The inverse kinematics module attempts to select natural posture configurations for the arm along the path found in the workspace. During the search, candidate configurations will be checked for collisions taking advantage of the graphics hardware-depth buffer. The algorithm is fast and easy to implement. It allows real-time planning not only in static, structured environments, but also in dynamic, unstructured environments. No preprocessing and prior knowledge about the environment is required. Several examples are shown illustrating the competence of the planner at generating motion plans for a typical human arm model with seven degrees of freedom.

关键词： Animation Hardware Acceleration Humans computer graphics Motion planning Application software Computational modeling computer simulation Kinematics

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Autobiographical retrospectives: The evolution of theory of modeling and simulation

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International Journal of General Systems 2003年第3期32卷 X-236页

作者： Zeigler, Bernard P. Arizona Center for Integrative Modeling and Simulation Department of Electrical and Computer Engineering University of Arizona Tucson AZ 85721 United States

No abstract available

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A Virtual Environment for Training Military Checkpoint Guards

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Proceedings of the Human Factors and Ergonomics Society Annual Meeting 2003年第19期47卷 2074 - 2078页

作者： Jean M. Catanzaro Mark W. Scerbo Frederic McKenzie Mark A. Phillips Nathan R. Bailey R. Bowen Loftin Department of Psychology Old Dominion University Department of Electrical and Computer Engineering Old Dominion University Virginia Modeling Analysis and Simulation Center Old Dominion University

The present study describes a Virtual Environment (VE) designed to train individuals to perform the role of a military checkpoint guard. Participants stood guard at a fictitious base in which simulated drivers in vehicles would approach seeking entrance. Participants were asked to inspect each vehicle, interact with the drivers, verify their identification, and make a decision to allow the driver to enter the base, to detain the vehicle, or to ask the driver to turn around and leave. The experiment was conducted in a CAVE™ with stereoscopic visual and auditory displays, participant tracking, and voice recognition. The results showed that participants were able to learn quite effectively in the VE with the biggest performance improvements seen in the areas of proper protocol and social influence. These findings suggest that VE technology holds promise for activities that are more like experience-based training and which place a greater emphasis on social interaction skills.

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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 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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