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IEEE International Conference on Robotics and Automation (ICRA)

作者： M. Isaacs M. Anderson S. Ashworth J. Blackburn-Lynch B. Bynum J. Pearce C. Pemberton Department of Mathematics and Computer Science Berea College Mobile Robotics and Parallel Processing Laboratory Berea KY USA Center for Distributed Robotics University of Minnesota Minneapolis MN USA

This article assesses the performance of a virtual pheromone-based sectored dispersion algorithm which is implemented on a low-cost miniature mobile robotic platform using sonar sensing. The approach is a distributed one and the robotic platform and sensor array are sufficiently inexpensive that they can be employed in undergraduate research and/or for coursework in a small college environment

关键词： Educational robots Robot sensing systems Mobile robots Sensor arrays Service robots parallel robots Hardware Mobile computing Educational institutions Dispersion

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Works in progress

Works in progress

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作者： Curry, Edward Mossière, Jacques Beloued, Abdelkrim Gilliot, Jean-Marie Segarra, Maria-Teresa André, Françoise Dyo, Vladimir Di Muro, Etienne Antoniutti Jaeger, Michael A. National University of Ireland Galway Institut National Polytechnique de Grenoble ENST-Bretagne University of Rennes Department of Computer Science ENST-Bretagne Brest France University of Rennes 1 IRISA INRIA Laboratory Rennes France University College London Department of Computer Science University College London Università degli Studi di Trieste Reliable Distributed Systems Group Università degli Studi di Trieste Italy Berlin University of Technology Communication and Operating Systems Group Berlin University of Technology Germany

The main focuses of the 2nd International Middleware Doctoral Symposium took place at Middleware 2005 are discussed. The symposium is a forum for an invited group of doctoral students and it provides an opportunity for them to obtain guidance from mentors and to meet with their peers. The event is aimed to give students constructive criticism before their thesis defense and foster discussions related to future career opportunities. The symposium attracted many high-quality submissions, ensuring a competitive selection process.

关键词： Online systems

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Towards a Grid of Sensors for Telemedicine

Towards a Grid of Sensors for Telemedicine

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Annual IEEE Symposium on computer-Based Medical systems

作者： C.O. Rolim F.L. Koch M. Assuncao C.B. Westphall Network and Management Laboratory Federal University of Santa Catarina Florianopolis Santa Catarina Brazil Grid Computing and Distributed Systems Laboratory and NICTA Victoria Laboratory Department of Computer Science and Software Engineering University of Melbourne Melbourne VIC Australia

In this article, we describe a grid of sensors to collect patients' vital data and to allow real time monitoring of patients in heath-care centres. We analyse the problem scenario and identify the components involved towards the construction of an integrated and homogeneous management system. Finally, we present a case study to demonstrate the applicability of our approach

关键词： Telemedicine Grid computing Laboratories Real time systems Sensor systems Patient monitoring computerized monitoring Data security Ontologies computer architecture

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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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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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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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Semantic-based Grid Resource Discovery and its Integration with the Grid Service Broker

Semantic-based Grid Resource Discovery and its Integration w...

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International Conference on Advanced Computing and Communications (ADCOM)

作者： Thamarai Selvi Somasundaram R.A. Balachandar Vijayakumar Kandasamy Rajkumar Buyya Rajagopalan Raman N. Mohanram S. Varun Department of Information Technology Anna University Chennai India Grid Computing and Distributed Systems Laboratory Department of Computer Science and Software Engineering University of Melbourne VIC Australia Centre for Development of Advanced Computing Chennai India Centre for Development of Advanced Computing Bangalore India

This paper addresses the need of semantic component in the grid environment to discover and describe the grid resources semantically. We propose semantic grid architecture by introducing a knowledge layer at the top of Gridbus broker architecture and thereby enabling broker to discover resources semantically. The semantic component in the knowledge layer enables semantic description of grid resources with the help of ontology template. The ontology template has been created using Protege-OWL editor for different types of computing resources in the grid environment. The Globus Toolkit's MDS is used to gather grid resource information and Protege-OWL libraries are used to dynamically create knowledge base of grid resources. Algernon inference engine is used for interacting with the knowledge base to discover suitable resources.

关键词： distributed computing Ontologies Middleware computer architecture computer networks Grid computing Libraries Engines Monitoring Aggregates

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A critique of java for concurrent programming

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IEEE distributed systems Online 2005年第9期6卷

作者： Garg, Vijay K. Mittal, Neeraj University of Texas Austin University of Texas Dallas Electrical and Computer Engineering Department University of Texas Austin University's Parallel Distributed Systems Laboratory Department of Computer Science University of Texas Dallas

A comparative study between Java and Avaj, a concurrent programming language, is presented. java uses wait (), notify (), and notifyAll () construct to support monitors, while Avaj simply supports the construct await (B), where B is any Boolean expression. The syntax for the Avaj abort () construct is simple and allows programmer to call abort () inside any method. Avaj also incorporates the selective communication construct in the language. The invariant (B) construct in Avaj allows a Boolean expression to be invariant in a program.

关键词： Java programming language

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CSFS: A Java enabled network file storage system

CSFS: A Java enabled network file storage system

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作者： Hua, Han Yafei, Dai Xiaoming, Li Computer Networks and Distributed Systems Laboratory Department of Computer Science and Technology Peking University Beijing 100871 China

The CSFS (cryptographic storage file system) is a network file storage system that is suitable for a small-to-medium sized networks such as a campus network. In a CSFS, a lot of distributed file servers are organized in a star-liked architecture. File names are stored in a name server and file data are stored in distributed file servers. A CSFS has good scalability and is able to accommodate hundreds of file servers. We implemented a CSFS in pure Java and tested the system with a benchmark. The test results show that CSFS delivers acceptable performance for general file operations. Its performance of file upload and download is as efficient as FTP. It can support more than 450 concurrent online users. Copyright © 2005 John Wiley & Sons, Ltd.

关键词： File organization

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A taxonomy of workflow management systems for Grid computing

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Journal of Grid Computing 2005年第3-4期3卷 171-200页

作者： Yu, Jia Buyya, Rajkumar Grid Computing and Distributed Systems (GRIDS) Laboratory Department of Computer Science and Software Engineering The University of Melbourne Melbourne Vic. Australia

With the advent of Grid and application technologies, scientists and engineers are building more and more complex applications to manage and process large data sets, and execute scientific experiments on distributed resources. Such application scenarios require means for composing and executing complex workflows. Therefore, many efforts have been made towards the development of workflow management systems for Grid computing. In this paper, we propose a taxonomy that characterizes and classifies various approaches for building and executing workflows on Grids. We also survey several representative Grid workflow systems developed by various projects world-wide to demonstrate the comprehensiveness of the taxonomy. The taxonomy not only highlights the design and engineering similarities and differences of state-of-the-art in Grid workflow systems, but also identifies the areas that need further research. © Springer science+Business Media, Inc. 2006.

关键词： Grid computing Resource management Scheduling Taxonomy Workflow management

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