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作者： Anand, Sarabjot Singh Bunescu, Razvan Carvcdho, Vitor Chomicki, Jan Conitzer, Vincent Cox, Michael T. Dignum, Virginia Dodds, Zachary Dredze, Mark Furcy, David Gabrilovich, Evgeniy Göker, Mehmet H. Guesgen, Hans Hirsh, Haym Jannach, Dietmar Junker, Ulrich Ketter, Wolfgang Kobsa, Alfred Koenig, Sven Lau, Tessa Lewis, Lundy Matson, Eric Metzler, Ted Mihalcea, Rada Mobasher, Bamshad Pineau, Joelle Poupart, Pascal Raja, Anita Ruml, Wheeler Sadeh, Norman Shani, Guy Shapiro, Daniel Smith, Trey Taylor, Matthew E. Wagstaff, Kiri Walsh, William Zhou, Rong Department of Computer Science University of Warwick United Kingdom School of Electrical Engineering and Computer Science Ohio University United States Microsoft Live Labs United States computer science and engineering University at Buffalo United States Computer science and economics Duke University United States Intelligent Computing group of BBN Technologies Utrecht University Netherlands Department of Computer science Harvey Mudd College United States University of Pennsylvania United States University of Wisconsin United States Yahoo Research PricewaterhouseCoopers Center for Advanced Research United States Department of Computer science School of Engineering and Advanced Technology Massey University New Zealand Departent of Computer science Rutgers University United States Department of Computer Science Dortmund University of Technology. Germany ILOG Rotterdam School of Management Erasmus University Netherlands Donald Bren School of Information and Computer Sciences University of California Irvine United States Depatrment of Computer science University of Southern California United States IBM Almaden Research Center United States Department of Computer Information Technology Southern New Hampshire University United States Computer and Information Technology Program College of Technology Purdue University United States Hughes Program for Religion and Science Dialogue Oklahoma City University United States Department of Computer Science and Engineering University of North Texas United States School of Computing DePaul University United States Department of Computer Science McGill University Canada School of Computer Science University of Waterloo Canada Department of Software and Information Systems University of North Carolina Charlotte United States University of New Hampshire United States Microsoft Research Institute for the Study of Learning and Expertise Applied Reactivity Inc. United States NASA Ames Research Center Carnegie Mellon University West

AAAI was pleased to present the AAAI-08 Workshop Program, held Sunday and Monday, July 13-14, in Chicago, Illinois, USA. The program included the following 15 workshops: Advancements in POMDP Solvers;AI Education Workshop Colloquium;Coordination, Organizations, Institutions, and Norms in Agent systems, Enhanced Messaging;Human Implications of Human-Robot Interaction;Intelligent Techniques for Web Personalization and Recommender systems;Metareasoning: Thinking about Thinking;Multidisciplinary Workshop on Advances in Preference Handling;Search in Artificial Intelligence and Robotics;Spatial and Temporal Reasoning;Trading Agent Design and Analysis;Transfer Learning for Complex Tasks;What Went Wrong and Why: Lessons from AI Research and Applications;and Wikipedia and Artificial Intelligence: An Evolving Synergy. Copyright © 2009, Association for the Advancement of Artificial Intelligence. All rights reserved.

关键词： Human robot interaction

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Global automata: A new approach on modelling industrial systems

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International Journal of Industrial and systems engineering 2008年第4期3卷 383-406页

作者： Deligiannis, Vasileios Manesis, Stamatis Lygeros, John Systems and Measurement Laboratory Department of Electrical and Computer Engineering University of Patras Rion-Patras 26500 Greece ETH Zurich Automatic Control Laboratory Physikstrasse 3 Zurich 8092 Switzerland

This paper introduces Global Automata as a new approach on modelling contemporary industrial systems. Global automata are based on automata philosophy and, as their name reveals, they constitute a super-set of existing automata types. Their implementation field is, therefore, wider in comparison with other available types. Their main characteristic is that they are especially oriented for industrial use. As regards to model architecture, they introduce new formulation parameters diversifying from conventional types, while they keep some common basic features. A formal definition of global automata is given as also two useful tools for system modelling, which are state aggregation and automata composition. Their use is illustrated with two representative industrial examples. © 2008, Inderscience Publishers.

关键词： Industrial engineering

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Green supercomputing comes of age

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IT Professional 2008年第1期10卷 17-23页

作者： Feng, Wu-Chun Feng, Xizhou Ge, Rong Department of Computer Science and Electrical and Computer Engineering Virginia Tech. Network Dynamics and Simulation Science Laboratory Virginia Tech. Center for High-End Computing Systems Virginia Tech.

Energy-efficient (green) supercomputing has evolved to improve system reliability and provide better availability and productivity. Green Destiny supercomputing system is a Linux-based cluster that uses low-power components whose performance could be optimized for supercomputing. Low-power supercomputing focuses on energy efficiency at system integration time, selects low-power chips as the building blocks for power reduction and system reliability, and achieves better performance by scaling up to a larger number of processors. Researchers have implemented various power-aware software prototypes for commodity supercomputing starting with cluster of high-performance, high-power processors that support mechanism called dynamic voltage and frequency scaling (DVFS). Various approaches for parallel supercomputing nodes are studied by aiming execution phases that are not on the critical execution path.

关键词： Supercomputers

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CloudBLAST: combining MapReduce and virtualization on distributed resources for bioinformatics applications

CloudBLAST: combining MapReduce and virtualization on distri...

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4th IEEE International Conference on eScience, eScience 2008

作者： Matsunaga, Andréa Tsugawa, Maurício Fortes, José Advanced Computing and Information Systems Laboratory Department of Electrical and Computer Engineering University of Florida PO Box 116200 Gainesville FL 32611-6200 United States

ISBN: (纸本)9780769535357

This paper proposes and evaluates an approach to the parallelization, deployment and management of bioinformatics applications that integrates several emerging technologies for distributed computing. The proposed approach uses the MapReduce paradigm to parallelize tools and manage their execution, machine virtualization to encapsulate their execution environments and commonly used data sets into flexibly deployable virtual machines, and network virtualization to connect resources behind firewalls/NATs while preserving the necessary performance and the communication environment. An implementation of this approach is described and used to demonstrate and evaluate the proposed approach. The implementation integrates Hadoop, Virtual Workspaces, and ViNe as the MapReduce, virtual machine and virtual network technologies, respectively, to deploy the commonly used bioinformatics tool NCBI BLAST on a WAN-based test bed consisting of clusters at two distinct locations, the University of Florida and the University of Chicago. This WAN-based implementation, called CloudBLAST, was evaluated against both non-virtualized and LAN-based implementations in order to assess the overheads of machine and network virtualization, which were shown to be insignificant. To compare the proposed approach against an MPI-based solution, CloudBLAST performance was experimentally contrasted against the publicly available mpiBLAST on the same WAN-based test bed. Both versions demonstrated performance gains as the number of available processors increased, with CloudBLAST delivering speedups of 57 against 52.4 of MPI version, when 64 processors on 2 sites were used. The results encourage the use of the proposed approach for the execution of large-scale bioinformatics applications on emerging distributed environments that provide access to computing resources as a service. © 2008 IEEE.

关键词： MapReduce

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Characterizing user-level network virtualization: performance, overheads and limits

Characterizing user-level network virtualization: performanc...

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4th IEEE International Conference on eScience, eScience 2008

作者： Tsugawa, Maurício Fortes, José A. B. Advanced Computing and Information Systems Laboratory Department of Electrical and Computer Engineering University of Florida PO Box 116200 Gainesville FL 32611-6200 United States

ISBN: (纸本)9780769535357

Connectivity limitations of the current Internet pose challenges to e-Science infrastructure, as communication between resources is of key importance for the sharing of hardware, software and data across geographically distributed institutions. To overcome such limitations many overlay networks have been developed. Existing solutions report performance that can keep up with slow wide-area links-however the question remains as to how overlay networks perform on new high-speed Internet connections. This paper characterizes the performance of user-level packet processing, which is at the core of most overlay networks implementations. To this end, building blocks of packet processing software are identified and characterized, and performance of IP forwarders developed in C and Java are compared through extensive measurements. Factors that affect the performance of overlay networks and limitations of existing solutions are characterized, providing insights on possible improvements. Experimental results show the following: to achieve maximum throughput, only a few microseconds (2 to 5) can be spent in virtual network processing;processing of small packets can limit TCP throughput;and overlays need to be carefully architected as encapsulation overheads can be substantial. © 2008 IEEE.

关键词： Overlay networks

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Characterizing User-Level Network Virtualization: Performance, Overheads and Limits

Characterizing User-Level Network Virtualization: Performanc...

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IEEE International Conference on e-Science and Grid computing

作者： Maurício Tsugawa José A. B. Fortes Advanced Computing and Information Systems Laboratory Advanced Computing and Information Systems Laboratory Department of Electrical and Computer Engineering University of Florida Gainesville FL USA

Connectivity limitations of the current Internet pose challenges to e-Science infrastructure, as communication between resources is of key importance for the sharing of hardware, software and data across geographically distributed institutions. To overcome such limitations many overlay networks have been developed. Existing solutions report performance that can keep up with slow wide-area links - however the question remains as to how overlay networks perform on new high-speed Internet connections. This paper characterizes the performance of user-level packet processing, which is at the core of most overlay networks implementations. To this end, building blocks of packet processing software are identified and characterized, and performance of IP forwarders developed in C and Java are compared through extensive measurements. Factors that affect the performance of overlay networks and limitations of existing solutions are characterized, providing insights on possible improvements. Experimental results show the following: to achieve maximum throughput, only a few microseconds (2 to 5) can be spent in virtual network processing; processing of small packets can limit TCP throughput; and overlays need to be carefully architected as encapsulation overheads can be substantial.

关键词： IP networks Software performance Java Hardware Throughput Peer to peer computing Routing Resource virtualization computer networks Distributed computing

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Real-time servo control architecture for parallel stabilization and manipulation of tele-operated robots

Real-time servo control architecture for parallel stabilizat...

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2008 International Conference on Automation, Robotics and Control systems, ARCS 2008

作者： Amanatiadis, A. Papadakis, S.E. Laboratory of Electronics Department of Electrical and Computer Engineering Democritus University of Thrace 12 Vas. Sofias Str GR-67100 Xanthi Greece Division of Computing Systems Department of Industrial Informatics Technological Educational Institution of Kavala GR-65404 Kavala Greece

ISBN: (纸本)9781615677146

This paper presents a control architecture for semi-autonomous tele-operated robots. The architecture is based on two parallel behavior modules: automatic mechanical image stabilization control and remote head posing control. All processes are performed in Linux-based Real-time Operating systems using open source libraries under GPL license. Detailed behavior is executed through priorities to prevent the computation waste and simultaneous and non-synchronized accesses to servo motors. Experimental results showed that our system is capable of satisfying the hard-real time requirements for the servo control, with great precision. The system has an open modular and scalable architecture with high performance and low cost.

关键词： Stabilization

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CloudBLAST: Combining MapReduce and Virtualization on Distributed Resources for Bioinformatics Applications

CloudBLAST: Combining MapReduce and Virtualization on Distri...

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IEEE International Conference on e-Science and Grid computing

作者： Andréa Matsunaga Maurício Tsugawa José Fortes Advanced Computing and Information Systems Laboratory Department of Electrical and Computer Engineering University of Florida Gainesville FL USA

关键词： Application virtualization Resource virtualization Bioinformatics Distributed computing Virtual machining Testing Technology management computer network management Environmental management Resource management

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Multiple scale analysis of semiconductor amplifiers

Multiple scale analysis of semiconductor amplifiers

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International Conference on Advanced Optoelectronics and Lasers (CAOL)

作者： Malin Premaratne Advanced Computing and Simulation Laboratory (AXL) Department of Electrical and Computer Systems Engineering Monash University Clayton VIC Australia

Short-pulse propagation in optical amplifiers has been widely studied for applications in optical signal processing and optical communications areas. Even though it is possible to integrate differential equations numerically, such implementations may not provide adequate insight into the device operation. We propose a systematic way to construct analytical solutions under pulsed conditions and show excellent agreement with numerically integrated results. Our approach makes use of the multiple-scale technique in which different time scales associated with physical processors are cleverly used to partition amplifier response to different regions where analytical solution can be found using simple techniques.

关键词： Semiconductor optical amplifiers Pulse amplifiers Optical pulses Optical pulse shaping Stimulated emission Optical signal processing Optical amplifiers Nonlinear optics Space vector pulse width modulation computer crime

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Multiple-scale Analysis of Optical Amplifiers

Multiple-scale Analysis of Optical Amplifiers

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IEEE PhotonicsGlobal@Singapore, IPGC

作者： Malin Premaratne Advanced Computing and Simulation Laboratory (AXL) Department of Electrical and Computer Systems Engineering Monash University Clayton VIC Australia

关键词： Stimulated emission Semiconductor optical amplifiers Optical amplifiers Pulse amplifiers Optical pulses Optical signal processing Space vector pulse width modulation Optical pulse shaping Optical computing Atom optics

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