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The collaborative P-GRADE Grid Portal

5th International Conference on Computational Science - ICCS 2005

作者： Lewis, Gareth J. Sipos, Gergely Urmetzer, Florian Alexandrov, Vassil N. Kacsuk, Peter Advanced Computing and Emerging Technologies Centre School of Systems Engineering University of Reading WhiteKnights Reading RG6 6AY United Kingdom MTA SZTAKI Laboratory of Parallel and Distributed Systems H-1518 Budapest Hungary

ISBN: (纸本)9783540260448

Grid portals are increasingly used to provide uniform access to the grid infrastructure. This paper describes how the P-GRADE Grid Portal could be used in a collaborative manner to facilitate group work and support the notion of Virtual Organisations. We describe the development issues involved in the construction of a collaborative portal, including ensuring a consistent view between participants of a collaborative workflow and management of proxy credentials to allow separate nodes of the workflow to be submitted to different grids. © Springer-Verlag Berlin Heidelberg 2005.

关键词： Computational methods

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Interoperating AutoSched AP using the High Level Architecture 05

Interoperating AutoSched AP using the High Level Architectur...

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Simulation Winter Conference

作者： Boon Ping Gan P. Lendermann M. Yoke Hean Low S.J. Turner Xiaoguang Wang S.J.E. Taylor D-SIMLAB Programme Singapore Institute of Manufacturing Technology Singapore Singapore Parallel and Distributed Computing Centre Nanyang Technological University Singapore Singapore Centre for Applied Simulation Modeling School of Information Systems Computing and Mathematics Brunei University Uxbridge UK

ISBN: (纸本)9780780395190

The high Level Architecture (HLA) is an IEEE standard for interoperating simulation federates. In this paper, we describe a set of requirements that simulation packages need to satisfy in order to be made interoperable using the HLA standard. AutoSched AP, a commercial off-the-shelf simulation package (CSP) which is widely used in the semiconductor industry, was used as a case study for this interoperation exercise. We demonstrated that a straightforward customization of the CSP through a middleware that provides standard functions for interoperation may not provide a satisfactory solution. A specially optimized time synchronization mechanism needs to be installed to ensure good execution efficiency. Experimental results using a Borderless Fab model that comprises of two factory models show that an optimized time synchronization mechanism results in an execution time that is ten times better than a straightforward application of the HLA runtime infrastructure's time synchronization mechanism.

关键词： Chip scale packaging Business Gallium nitride Standards development Standards organizations Communication standards Computational modeling Semiconductor device packaging Electronics industry Production facilities

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Using manufacturing process flow for time synchronization in HLA-based simulation 05

Using manufacturing process flow for time synchronization in...

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

作者： Boon Ping Gan M. Yoke Hean Low Xiaoguang Wang S.J. Turner Singapore Institute of Manufacturing Technology D-SIMLAB Programme Singapore Parallel and Distributed Computing Centre School of Computer Engineering Nanyang Technological University Singapore

ISBN: (纸本)9780769524627

Time synchronization has always been a critical deciding factor of whether interoperating simulation models using the high level architecture (HLA) is achievable efficiently. In this paper, we propose a conservative time synchronization algorithm that makes use of the manufacturing process flow information (a sequence of steps production lots flow through) in the computation of the request time. This time is used by the simulation federate to issue requests to advance time to the HLA runtime infrastructure (RTI). The proposed algorithm monitors the simulation events that potentially trigger external timestamp messages at the exit step and j processing steps before this exit step as well as simulation events that extend the timestamp of external messages. We evaluated the performance of this algorithm using a Borderless Fab simulation model on the AutoSched AP. The experimental results show that the algorithm performs much better than a straightforward use of the RTFs time synchronization, and the further back we went in looking at the processing steps, the better the execution time that was achieved.

关键词： Manufacturing processes Computational modeling Protocols Computer aided manufacturing Collaboration Computer simulation Distributed computing Runtime Discrete event simulation Packaging

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An integrated and adaptive decision-support framework for high-tech manufacturing and service networks

An integrated and adaptive decision-support framework for hi...

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Simulation Winter Conference

作者： P. Lendermann M.Y.H. Low Boon Ping Gan N. Julka Lai Peng Chan S.J. Turner Wentong Cai Xiaoguang Wang Loo Hay Lee T. Hung S.J.E. Taylor L.F. McGinnis S. Buckley Singapore Institute of Manufacturing Technology Singapore Singapore Parallel and Distributed Computing Centre Nanyang Technological University Singapore Singapore Department of Industrial and Systems Engineering National University of Singapore Singapore Institute of High Performance Computing Singapore Singapore Centre for Applied Simulation Modelling School of Information Systems Computing and Maths Brunei University Uxbridge Middlesex UK School of Industrial and Systems Engineering Georgia Institute of Technology Atlanta GA USA

This article describes the results of one of the ten pilot programmes under the integrated manufacturing and service systems (IMSS) initiative pursued by the Agency for Science, Technology and Research (A* STAR) in Singapore. The objective of this particular programme is to investigate how design, analysis, enhancement and implementation of critical business processes in a manufacturing and service network can be realised using one single simulation/application framework. The overall architecture of the framework outlines how commercial simulation packages and Web-service based business process application components would have to be connected through a commercial application framework to achieve maximum leverage and re-usability of the applications involved. In the pilot phase of this programme, research issues were also addressed with regard to mechanisms for interoperation between commercial simulation packages, symbiotic interaction between simulation-based decision support components and physical systems, and simulation speed-up through multi-objective optimal computing budget allocation techniques on a grid infrastructure.

关键词： Business Logistics Computational modeling Job shop scheduling Manufacturing processes Virtual manufacturing Packaging Drives Distributed computing Computer industry

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Investigating distributed simulation at the Ford Motor Company

Investigating distributed simulation at the Ford Motor Compa...

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

作者： S.J.E. Taylor L. Behli Xiaoguang Wang S.J. Turner J. Ladbrook Centre for Applied Simulation Modeling Brunel University Uxbridge Middlesex UK Centre for Appl. Simulation Modeling Brunei Univ. Uxbridze Middlesex UK Parallel and Distributed Computing Centre Nanyang Technological University Singapore Dunton Engineering Centre Ford Motor Company Limited Basildon Essex UK Dunton Engineering Centre Ford Motor Company Mail 15/4a-F04-D Basildon UK

Engine production is a complex process that requires the manufacturing and assembly of a wide variety of components to create a varied product mix. Simulation plays a key role in the planning process of a new production line to determine if it can meet expected demand. However, these simulations can be very time consuming and can often take up to a day to execute a single run. This paper investigates how distributed simulation based on the IEEE 1516 High Level Architecture and the emerging standard COTS Simulation Package Interoperability Product Development Group (CSPI-PDG) Type I Interoperability Reference Model could be used to reduce the time taken for a single simulation run. CSP interoperability and the problem of integrating CSPs with HLA software (the runtime infrastructure) are presented. New prototype benchmarking software, the COTS Simulation Package Emulator (CSPE), which is being developed to investigate distributed simulation problems, is discussed. The paper then develops a case study of how this was used to investigate the feasibility of using distributed simulation at Ford. The paper discusses results obtained from this case study and suggests that distributed simulation could indeed be beneficial to Ford.

关键词： Packaging Engines Manufacturing processes Assembly Meeting planning Process planning Production planning Computer architecture Standards development Product development

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Lattice Boltzmann method for phase‐separating liquid‐vapor systems

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AIP Conference Proceedings 2005年第1期762卷 626-631页

作者： Victor Sofonea Giuseppe Gonnella Antonio Lamura *Laboratory for Numerical Simulation and Parallel Computing in Fluid Mechanics Centre for Fundamental and Advanced Technical Research Romanian Academy Bd. Mihai Viteazul 24 RO — 300223 Timişoara Romania †Istituto Applicazioni Calcolo CNR Sezione di Bari Via Amendola 122/D 70126 Bari Italy **Dipartimento di Fisica Università di Bari Sezione di Bari Via Amendola 173 I ‐ 70126 Bari Italy ‡INFN Sezione di Bari Via Amendola 173 I ‐ 70126 Bari Italy

In this paper introduce a finite difference lattice Boltzmann model capable to describe the hydrodynamics and the phase separation of a two‐dimensional liquid‐vapor system. A numerical scheme involving flux limiter techniques is proposed to minimize spurious numerical effects. We report some simulation results of the spinodal decomposition process and we find evidence of two different growth regimes depending on the system viscosity.

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"Gridifying" aerodynamic design problem using gridRPC 2nd

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2nd International Workshop on Grid and Cooperative computing, GCC 2003

作者： Ho, Quoc-Thuan Ong, Yew-Soon Cai, Wentong Parallel and Distributed Computing Centre School of Computer Engineering Nanyang Technological University 639798 Singapore

ISBN: (纸本)3540219889

This paper presents a "gridifying" process for aerodynamic wing design as a case study of complex engineering design problems. In order to assist engineers and scientists to solve the problems on the Grid environment effectively, we developed an API based on GridRPC, a Remote Procedure Call standard interface for Grid-enabled applications. In this work, we also provide mechanisms to reduce communication cost and schedule GridRPC requests across multiple clusters on the Grid. These facilities are incorporated in our GridRPC API implementation. © Springer-Verlag Berlin Heidelberg 2004.

关键词： Grid computing

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Grid services and service discovery for HLA-based distributed simulation

Grid services and service discovery for HLA-based distribute...

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Proceedings - Eighth IEEE International Symposium on Distributed Simulation and Real-Time Applications, DS-RT 2004

作者： Zong, Wenbo Wang, Yong Cai, Wentong Turner, Stephen J. Parallel and Distributed Computing Centre School of Computer Engineering Nanyang Technological University Singapore 639798

ISBN: (纸本)0769522327

Modelling and simulation permeate all areas of business, science and engineering and increasingly complex simulation systems often require huge computing resources and data sets that are geographically distributed. The widely adopted platform for building distributed simulations is the High Level Architecture (HLA). Deficiencies associated with HLA have been well discussed in the literature. The advent of Grid technology enables the use of distributed computing resources and facilitates the access of geographically distributed data. In this paper, we propose a framework for executing large-scale distributed simulations using Grid services. The framework addresses some of the deficiencies of HLA, including dynamic discovery and resource utilization. End-users can construct large-scale distributed simulations using this framework with ease. © 2004 IEEE.

关键词： Distributed computer systems

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Multi-agent interactions in distributed virtual worlds

Multi-agent interactions in distributed virtual worlds

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IEEE TENCON 2004 - 2004 IEEE Region 10 Conference: Analog and Digital Techniques in Electrical Engineering

作者： Wang, Fang Turner, Stephen John Wang, Lihua Parallel and Distributed Computing Centre School of Computer Engineering Nanyang Technological University 639798 Singapore Singapore

Multi-agent systems provide a valuable tool for handling increasing software complexity and supporting rapid and accurate problem solving. This paper presents a general architecture in which autonomous agents are embedded in a distributed virtual environment and are enabled to communicate with each other. We focus on the interaction issues, using cooperation and coordination patterns. Different cases of the agents' teamwork to improve their efficiency are investigated and compared. A prototype system has been implemented, with message templates and algorithms identified. Finally, some experimental results are given. © 2004 IEEE.

关键词： Multi agent systems

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Grid-based metadata services

Grid-based metadata services

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Proceedings - 16th International Conference on Scientific and Statistical Databse Management, SSDBM 2004

作者： Deelman, Ewa Singh, Gurmeet Atkinson, Malcolm P. Chervenak, Ann Hong, Neil P. Chue Kesselman, Carl Patil, Sonal Pearlman, Laura Su, Mei-Hui Information Sciences Institute University of Southern California Department of Computing Science University of Glasgow Division of Informatics University of Edinburgh Edinburgh Parallel Computing Centre United Kingdom

Data sets being managed in Grid environments today are growing at a rapid rate, expected to reach 100s of Petabytes in the near future. Managing such large data sets poses challenges for efficient data access, data publication and data discovery. In this paper we focus on the data publication and discovery process through the use of descriptive metadata. This metadata describe the properties of individual data items and collections. We discuss issues of metadata services in service rich environments, such as the Grid. We describe the requirements and the architecture for such services in the context of Grid and the available Grid services. We present a data model that can capture the complexity of the data publication and discovery process. Based on that model we identify a set of interfaces and operations that need to be provided to support metadata management. We present a particular implementation of a Grid metadata service, basing it on existing Grid services technologies. Finally we examine alternative implementations of that service.

关键词： Metadata

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