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SICE Annual Conference

作者： Koji Ito Tsutomu Imai Naoki Tomi Toshiyuki Kondo Department of Computational Intelligence and Systems Science Tokyo Institute of Technology Yokohama Japan Department of Computer Information and Communication Sciences Tokyo University of Agriculture슠and슠Technology Tokyo Japan

In daily life, we utilize many kinds of tools to achieve various tasks. The tool connects the body with the environment. In order to realize the task quickly, smoothly or efficiently, it is required to adjust the kinematic and dynamic relations among the body, tool and environment according to the task. Recent studies have shown that humans can acquire a neural representation of the relation between motor command and movement, i.e. learn an internal model of the environment dynamics. Then, we can compensate for the mechanical perturbation in a feedforward manner. The present paper discusses whether humans can identify one side of dynamics from the mixed environment dynamics in the case where humans have experienced either of them

关键词： Humans Switches Context modeling Biological system modeling Predictive models Indium tin oxide Computational intelligence Agriculture Kinematics Adaptation model

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New optical access network architecture using optical packet switches

New optical access network architecture using optical packet...

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作者： Ueda, Hiromi Nomura, Takumi Makino, Kunitetsu Tsuboi, Toshinori Kurokawa, Hiroaki Kasai, Hiroyuki Tokyo University of Technology Hachioji-shi 192-0982 Japan NEC Communication Systems Ltd. Ikoma-shi 630-0101 Japan PyxisWay Networks Inc. Kawasaki-shi 213-0012 Japan School of Computer Science Tokyo University of Technology Tokyo Japan IEEE Japan Communication Quality and Reliability TC IEEE ComSoc Japan Ltd. NCOS Laboratory PyxisWay Networks Inc. Japan Tokyo University of Technology Japan School of Computer Science IPSJ Japan Japan Association for Social Informatics Japan Japan e-Learning Association Japan Department of Electronics Tokyo University of Technology Japan School of Computer Science Tokyo University of Technology Japan

This paper proposes a new optical access network architecture that differs from those of conventional Point-to-Point (PP) and Passive Optical Networks (PON). The proposed architecture, Optical Switched Access Network (OSAN), uses Optical Switching Modules (OSMs) that connect an Optical Line Terminal (OLT) to Optical Network Units (ONUs) in a virtual point to point configuration so that it offers the merits of both PP and PON while overcoming their demerits. Each OSM optically switches packets of variable length one by one under electrical control. To allow the elimination of optical buffers from OSM, OSAN uses the Multi-Point Control Protocol (MPCP) defined in IEEE 802.3ah. We evaluate the transmission distances between OLT and ONUs, and consider a network synchronization scheme and discovery mechanism that supports MPCP. Copyright © 2006 The Institute of Electronics, Information and communication Engineers.

关键词： Fiber optic networks

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The robot software communications architecture (RSCA): embedded middleware for networked service robots 06

The robot software communications architecture (RSCA): embed...

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International Symposium on Parallel and distributed Processing (IPDPS)

作者： Seongsoo Hong Jaesoo Lee Hyeonsang Eom Gwangil Jeon Real-Time Operation Systems Laboratory School of Electrical Engineering and Computer Science Seoul National University of Technology Seoul South Korea Distributed Information Processing Laboratory School of Computer Science and Computer Engineering Seoul National University of Technology Seoul South Korea Department of Computer Engineering Korea Polytechnic University Siheung Gyeonggi South Korea

ISBN: (纸本)9781424400546

In this paper, we present a robot middleware technology named robot software communications architecture (RSCA) for its use in networked home service robots. The RSCA provides a standard operating environment for the robot applications together with a framework that expedites the development of such applications. The operating environment is comprised of a real-time operating system, a communication middleware, and a deployment middleware. Particularly, the deployment middleware supports the reconfiguration of component-based robot applications including installation, creation, start, stop, tear-down, and un-installation. In designing RSCA, we have adopted a middleware called SCA from the software defined radio domain and extend it since the original SCA lacks the real-time guarantees and appropriate event services. We have fully implemented RSCA and performed measurements to quantify its run-time performance. Our implementation clearly shows the viability of RSCA

关键词： Embedded software computer architecture Middleware Service robots Application software Standards development Real time systems Operating systems Software radio Performance evaluation

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Design of OXC architectures based on arrayed waveguide gratings: topological properties and physical performance

Design of OXC architectures based on arrayed waveguide grati...

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IEEE Workshop on High Performance Switching and Routing

作者： R. Zanzottera C. Matrakidis A. Stavdas S. Sygletos A. Pattavina Department of Electronics and Information Politecnico di Milano Italy Institute of Communication and Computer Systems National and Technical University of Athens Greece Department of Telecommunications Science and Technology University of Peloponnese Tripoli Greece

In this paper an OXC architecture incorporating a wavelength switching stage and a broadcast and select stage is presented. In order to overcome the need for tunable wavelength converters with a wide tuning range, several multistage topologies are proposed for the wavelength conversion stage. The topological properties of the architectures are evaluated to determine the non-blocking conditions using space equivalent diagrams. Finally, the physical layer performance of several configurations of the monostage and multistage topologies is examined so as to assess the OXC cascadeability in an optical network

关键词： Arrayed waveguide gratings Optical waveguides Optical wavelength conversion Optical network units Optical fiber networks Bandwidth Micromechanical devices Wavelength routing Physics computing Telecommunication computing

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A Neuromodulatory Neural Networks Model for Environmental Cognition and Motor Adaptation

A Neuromodulatory Neural Networks Model for Environmental Co...

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International Joint Conference on Neural Networks (IJCNN)

作者： T. Kondo K. Ito Department of Computer Information and Communication Sciences Tokyo University of Agriculture슠and슠Technology Koganei Tokyo Japan Department of Computational Intelligence and Systems Science Interdisciplinary Graduate School of Science and Engineering Tokyo Institute of Technology Yokohama Japan

Regardless of complex, unknown, and dynamically-changing environments, living creatures can recognize situated environments and behave adaptively by theirselves in real-time. However it is impossible to prepare optimal motion trajectories with respect to every possible situations in advance. The key concept for realizing suitable environmental cognition and motor adaptation is a context-based elicitation of constraints which are canalizing well-suited sensorimotor coordination. For this aim, in this study, we propose a polymorphic neural networks model called CTRNN+NM (CTRNN with neuromodulatory bias). The proposed model is applied to two dimensional arm-reaching movement control in various viscous curl force fields. The model parameters were optimized by GA. Simulation results reveal that the proposed model inherits high robustness even though it is situated in unexperienced environment, which has same curl but different size of viscous force, since it evolved "how to adapt" instead of "how to move.".

关键词： Neural networks Cognition Biological neural networks Real time systems Force control Force sensors Predictive models Irrigation Spatiotemporal phenomena Robot control

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Measuring Generality of Documents

Measuring Generality of Documents

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International Conference on Data Engineering Workshops

作者： Hyun Woong Shin E. Hovy D. McLeod L. Pryor Computer Science Department Integrated Media Systems Center University of Southern California Los Angeles CA USA Computer Science Department Institute of the Information Science University of Southern California Marina del Rey CA USA Annenberg School for Communication University of Southern California Los Angeles CA USA

Most traditional Information Retrieval (IR) systems, including web search engines, operationalize "relevant" as the word frequency in a document of a set of keywords. Because of this limitation, traditional IR systems frequently retrieve irrelevant documents in response to a user’s request. In this paper, we propose a new criterion, "generality," that provides an additional basis on which to rank retrieved documents. The generality is a level of abstraction to retrieve results based on desired generality appropriate for a user’s knowledge and interests. We compared our generality quantification algorithm with human judges’ weighting of values to show that the developed algorithm is significantly correlated.

关键词： Ontologies Information retrieval Frequency computer science Humans Information science Web search Search engines Testing Data engineering

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Multi-Objective Evolutionary Clustering using Variable-Length Real Jumping Genes Genetic Algorithm

Multi-Objective Evolutionary Clustering using Variable-Lengt...

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International Conference on Pattern Recognition

作者： K.S. Nawaz Ripon Chi-Ho Tsang S. Kwong Man-Ki Ip Department of Computer Science City University of Hong Kong Kowloon Hong Kong China Communication Systems Division Fujitsu Hong Kong Limited Causeway Bay Hong Kong China

ISBN: (纸本)0769525210

In this paper, we present a novel multi-objective evolutionary clustering approach using variable-length real jumping genes genetic algorithms (VRJGGA). The proposed algorithm that extends jumping genes genetic algorithm (JGGA) (Man et al., 2004) evolves near-optimal clustering solutions using multiple clustering criteria, without a-priori knowledge of the actual number of clusters. Experimental results based on several artificial and real-world data show that VRJGGA can obtain non-dominated and near-optimal clustering solutions in terms of different cluster quality measures and classification performance

关键词： Genetic algorithms Biological cells Encoding Clustering algorithms Clustering methods computer science Poles and towers Evolutionary computation Genetic mutations Flowcharts

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Economy-Based Data Replication Broker

Economy-Based Data Replication Broker

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IEEE International Conference on e-science and Grid Computing

作者： Henry Lin J.H. Abawajy Rajkumar Buyya Grid Computing and Distributed Systems Laboratory Department of Computer Science and Software Engineering University of Melbourne Melbourne VIC Australia Grid and Pervasive Computing Laboratory School of Engineering and Information Technology Deakin University Geelong VIC Australia

ISBN: (纸本)9781424430116

Data replication is one of the key components in data grid architecture as it enhances data access and reliability and minimises the cost of data transmission. In this paper, we address the problem of reducing the overheads of the replication mechanisms that drive the data management components of a data grid. We propose an approach that extends the resource broker with policies that factor in user quality of service as well as service costs when replicating and transferring data. A realistic model of the data grid was created to simulate and explore the performance of the proposed policy. The policy displayed an effective means of improving the performance of the grid network traffic and is indicated by the improvement of speed and cost of transfers by brokers.

关键词： Resource management Australia Telecommunication traffic Power generation economics Cost accounting Protocols Grid computing Pervasive computing computer science Software

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QoS-aware adaptive multipath routing protocol in ad hoc networks

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Jisuanji Xuebao/Chinese Journal of computers 2006年第5期29卷 681-689页

作者： Liu, Yong-Qiang Yan, Wei Dai, Ya-Fei Department of Computer Science and Technology Peking University Beijing 100871 China Computer Networks and Distributed Systems Laboratory School of Electronics Engineering and Computer Science Peking University Beijing 100871 China

Based on QoS framework-SWAN, A gateway-centric adaptive QoS-aware multipath routing protocol (GC-AQMR) is presented. It can ensure that each mobile node has a set of link-disjoint and loop-free routing to the gateway. Moreover, the intermediate node in the path also has the multipath information to the gateway. When the intermediate node experiences the congestion or link-break, it can switch adaptively to an alternate path with the additional path information. Simulations have shown that the SWAN system adopting GC-AQMR outperforms the SWAN with AODV protocol on all the performance metrics: Packet delivery ratio, average end-to-end delay/throughput and the fairness among real-time flows.

关键词： computer networks

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Combining Probabilistic Ranking and Latent Semantic Indexing for Feature Identification

Combining Probabilistic Ranking and Latent Semantic Indexing...

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IEEE Workshop on Program Comprehension

作者： D. Poshyvanyk A. Marcus V. Rajlich Y.-G. Gueheneuc G. Antoniol Department of Computer Science Wayne State University Detroit MI USA GEODES-Research Group on Open Distributed Systems Experimental Software Engineering University of Montreal Canada Department of Mathematics and Computer Science Babeş-Bolyai University Cluj-Napoca Romania Département de Génie Informatique École Polytechnique de Montréal Canada

The paper recasts the problem of feature location in source code as a decision-making problem in the presence of uncertainty. The main contribution consists in the combination of two existing techniques for feature location in source code. Both techniques provide a set of ranked facts from the software, as result to the feature identification problem. One of the techniques is based on a scenario based probabilistic ranking of events observed while executing a program under given scenarios. The other technique is defined as an information retrieval task, based on the latent semantic indexing of the source code. We show the viability and effectiveness of the combined technique with two case studies. A first case study is a replication of feature identification in Mozilla, which allows us to directly compare the results with previously published data. The other case study is a bug location problem in Mozilla. The results show that the combined technique improves feature identification significantly with respect to each technique used independently

关键词： Indexing computer science Software engineering Information retrieval Information analysis Data mining Decision making Uncertainty Software debugging Software systems

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