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10th IEEE International Conference on Rehabilitation Robotics

作者： Helal, Abdelsalam (Suini) Abdulrazak, Bessam Mobile and Pervasive Computing Laboratory Computer and Information Science and Engineering Department University of Florida Gainesville FL 32611 United States

ISBN: (纸本)9781424413195

This paper discusses a new concept of Scalable Home-Care Delivery for frail People with Special Needs (PwSN(1)), which we named TeCaRob(2). This concept explores the use of robotics inside Smart House to remotely assist frail elders and other PwSN in diverse tasks of daily living. The goal is to provide PwSN with a complete solution for their daily needs. Our objective is to enhance the existing Smart House concept, which have proven successful in supporting PwSN, and which have been challenged when PwSN occupants need physical assistance.

关键词： Intelligent buildings

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On construction of a BioGrid platform for parallel bioinformatics applications

Proceedings of the ACM Symposium on Applied Computing

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Proceedings of the ACM Symposium on Applied computing 2007年 144-145页

作者： Yang, Chao-Tung Han, Tsu-Fen Kan, Heng-Chuan High Performance Computing Laboratory Department of Computer Science and Information Engineering Tunghai University Taichung 40704 Taiwan Southern Business Unit National Center for High-performance Computing Hsinshi Tainan County 74147 Taiwan

ISBN: (纸本)1595934804;9781595934802

In this paper, we report on implementing an experimental distributed computing application for bioinformatics consisting of basic high-performance computing environments (Grid and PC Cluster systems), multiple interfaces at user portals that provide useful graphical interfaces to enable biologists who are not IT specialists to benefit directly from the use of high-performance technology. Copyright 2007 ACM.

关键词： Bioinformatics

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Improving gaming experience in zonal MMOGs

Improving gaming experience in zonal MMOGs

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15th ACM International Conference on Multimedia, MM'07

作者： Ahmed, Dewan Tanvir Shirmohammadi, Shervin Oliveira, Jauvane DISCOVER Laboratory School of Information Technology and Engineering University of Ottawa Canada ACiMA Laboratory Computer Science Department National Laboratory of Scientific Computing Petrópolis RJ Brazil

ISBN: (纸本)9781595937025

Synchronous communication is a primary concern for multi-user virtual environments like Massively Multiplayer Online Games (MMOGs). Most of the MMOGs offer discrete view for the avatars and follow logical zone layout for easy state management. The avatar movement, from one logical zone to another, causes reorganization at the P2P overlay structure. Its recurrent nature along with unintelligent zone crossing approaches eventually hampers synchronous communication. In this paper, we present performance enhancement mechanisms to reduce P2P overlay reorganization penalties based on avatars' physical characteristics. Avatars' unpredictable movement around the zone boundaries also incur repeated connections and disconnections either among the zone masters or among the multiple peers in the overlay networks. Interest driven zone crossing, dynamic shared region between adjacent zones, and clustering of the entities based on their attributes significantly alleviates these problems and also provides continuous view and seamless region crossing to players. The technical contribution of this paper is to present the effectiveness of object clustering mechanism and interest driven zone crossing with dynamic shared region between each adjacent zones to enhance the gaming experience of MMOG players or users of other types of networked virtual environments (VE). Copyright 2007 ACM.

关键词： Multimedia systems

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Parallel loop scheduling using knowledge-based workload estimation on grid environments

Parallel loop scheduling using knowledge-based workload esti...

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2007 International Symposium on Applications and the Internet, SAINT

作者： Shih, Wen-Chung Yang, Chao-Tung Chen, Chun-Jen Tseng, Shian-Shyong Department of Computer Science National Chiao Tung University Hsinchu 30010 Taiwan High-Performance Computing Laboratory Department of Computer Science and Information Engineering Tunghai University Taichung 40704 Taiwan Department of Information Science and Applications Asia University Taichung 41354 Taiwan

ISBN: (纸本)0769527566

Parallel loop scheduling on grid environments is a challenging problem, especially for loops with irregular workload distribution. In the past, this problem of load imbalance resulting from irregular workload was not explicitly addressed. This paper proposes a new approach to schedule loop iterations with irregular workload on grid environments. Based on knowledge-based estimation of workload, the proposed method can dispatch an appropriate proportion of workload to each node for execution according to its performance. In addition, the scheduler uses historical statistics of CPU usage and network bandwidth to estimate the dynamically changing performance of each node. Two applications, regular type and irregular one respectively, are implemented and executed on a grid test-bed, which consists of four schools. Experimental results show that the new approach improves the performance on previous schemes. © 2007 IEEE.

关键词： Grid computing

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Speed-Based Mobility Management for Heterogeneous Wireless Networks Interworking

Speed-Based Mobility Management for Heterogeneous Wireless N...

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IEEE Annual International computer Software and Applications Conference (COMPSAC)

作者： Ming-Hsien Yu Hsing Mei Department of Computer Science and Information Engineering Web Computing Laboratory Fu Jen Catholic University Taipei Taiwan Vibo Telecom Inc. Taipei Taiwan

A heterogeneous wireless network is constructed by a variety of wireless networks. More and more researches try to achieve seamless handoff between WWAN and WLAN in accordance with all layers. It is anticipated that the future wireless mobile Internet will be a pluralistic wireless environment. Majority of traditional location management schemes are based on paging mobile terminal within each domain area. This paper proposes a speed-based mobility management scheme to minimize the paging overhead cost and the resource reservation. Our proposed scheme consists of three main approaches. First, the mobile terminal location update is based on the movement speed, and this information will be transmitted to the system for dynamic management. Second, the required bandwidth of an application is dependent on the selection of the most suitable wireless network dynamically. Lastly, the classification of applications is applied to avoid handoff failures. The simulation results show about 40% reduction in signaling cost and significant paging delay improvement.

关键词： Mobile radio mobility management Wireless networks Paging strategies Wireless LAN Costs computer networks Internet WiMAX Timing Application software

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Implementation of Monitoring and information Service Using Ganglia and NWS for Grid Resource Brokers

Implementation of Monitoring and Information Service Using G...

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IEEE Asia-Pacific Conference on Services computing (APSCC)

作者： Chao-Tung Yang Tsui-Ting Chen Sung-Yi Chen High-Performance Computing Laboratory Department of Computer Science and Information Engineering Tunghai University Taichung Taiwan

Grid computing is increasingly used by organizations to achieve high performance computing and heterogeneous resources sharing. These grids may span several domain administrations via Internet. As a result of this, it may be difficult to monitor, control and manage those machines and resources. This paper aims at providing a multi-platform grid monitoring service which can monitor resources such as CPU speed and utilization, memory usage, disk usage, and network bandwidth in a real-time manner. Monitoring data is extracted form Ganglia and NWS tools then stored and transmitted in XML form and then used for displaying. All the information is displayed using real-time graphs.

关键词： Grid computing High performance computing Bandwidth Data mining computerized monitoring Condition monitoring Resource management XML Weather forecasting Chaos

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A Layered Optimization Approach for Redundant Reader Elimination in Wireless RFID Networks

A Layered Optimization Approach for Redundant Reader Elimina...

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IEEE Asia-Pacific Conference on Services computing (APSCC)

作者： Ching-Hsien Hsu Yi-Min Chen Chao-Tung Yang High-Performance Computing Laboratory Department of Computer Science and Information Engineering Tunghai University Taichung Taiwan Department of Computer Science and Information Engineering Chung Hua University Hsinchu Taiwan

The problem of redundant RFID reader elimination has instigated researchers to propose different optimization heuristics due to the rapid advance of technologies in large scale RFID systems. In this paper, we present a layered elimination optimization (LEO) which is an algorithm independent technique aims to detect maximum amount of redundant readers could be safely removed or turned off with preserving original RFID network coverage. A significant improvement of the LEO scheme is that number of "write-to-tag" operations could be largely reduced during the redundant reader identification phase. Moreover, LEO is a distributed scheme which does not need to collect global information for centralizing control, leading no communications and synchronizations among RFID readers. To evaluate the performance of the proposed techniques, we have implemented the LEO technique along with another redundant reader identification algorithm and other hybrid schemes. In experimental results, the LEO is shown to be effective and provides superior performance in terms of larger number of redundant reader could be detected and with lower algorithm overheads.

关键词： Radiofrequency identification Low earth orbit satellites Wireless sensor networks RFID tags Large-scale systems computer science Communication system control Radio frequency Temperature sensors computer networks

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A dynamic file replication strategy in data grids

A dynamic file replication strategy in data grids

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IEEE Region 10 International Conference TENCON

作者： Chao-Tung Yang Chun-Pin Fu Chien-Jung Huang High-Performance Computing Laboratory Department of Computer Science and Information Engineering Tunghai University Taichung Taiwan

As large amount of data that is produced by scientific experiments and simulations, data grid is a very important and useful technique to solve these kinds of problems in this region. Data replication is one technique that many researchers discuss in past years in data grid. It can create many copies of file and stored in the appropriate location to shorten the time of getting the file. In this paper, we propose a dynamical maintenance service of replication to maintain the data in grid environment. Replicas will be adjusted to the appropriate location for using. The BHR algorithm is a strategy to maintain replica dynamically. We point out a scenario that the BHR algorithm will cause a mistake when it operates. That mistake will limit the speed of transferring file. We propose the Dynamic Maintenance Service is aimed at overcoming the mistake proposed. The contributions of this paper are that the data grid environment will be more efficiency by using DMS algorithm. And the experimental results show that the DMS algorithm is more efficient than other replication strategies.

关键词： Bandwidth Delay Grid computing Computational modeling Distributed computing Resource management computer networks High performance computing Chaos Laboratories

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A One-Way File Replica Consistency Model in Data Grids

A One-Way File Replica Consistency Model in Data Grids

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IEEE Asia-Pacific Conference on Services computing (APSCC)

作者： Chao-Tung Yang Wen-Chi Tsai Tsui-Ting Chen Ching-Hsien Hsu High-Performance Computing Laboratory Department of Computer Science and Information Engineering Tunghai University Taichung Taiwan Department of Computer Science and Information Engineering Chung Hua University Hsinchu Taiwan

In recent years, grid technology, which is frequently used to solve the scientific problem, has ripened gradually. A large number of storage resources and computational power are combined to form a data grid network to deal with massive data of scientific experiments. Data replication generates huge data which are distributed in wide-area for researches around the globe. The files of grid environments can be modified by grid users might bring a critical problem of maintaining data consistency among the several replicas distributed in different machines. For that reason how to maintain the consistency of those files is a great challenge. In this paper, we propose a Oneway Replica Consistency model in data grid environments, which is used for consistency maintenance issue. Furthermore, we anticipate striking a balance between improving data access performance and replica consistency in data grids. This work can find out the more efficient ways of utilizing storage space is an important point.

关键词： Tin Grid computing Power engineering computing computer science Power engineering and energy Earth Availability Chaos Laboratories Data engineering

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A Peer-to-Peer Resource Sharing System with Data Grid Technology for Mobile Devices

A Peer-to-Peer Resource Sharing System with Data Grid Techno...

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International Conference on Multimedia and Ubiquitous engineering (MUE)

作者： Chao-Tung Yang Chun-Jen Chen Ching-Hsien Hsu High-Performance Computing Laboratory Department of Computer Science and Information Engineering Tunghai University Taichung Taiwan Information Engineering Chung Hua University Hsinchu Taiwan

Increases in mobile device processing power, storage capacity, and connectivity in recent years have led to a rapid rise in mobile device use. But mobile users face challenges in making connections with other users in order to share resources. To address this issue, we propose an architecture that uses peer-to-peer protocol to establish a resource sharing platform for mobile devices, combined with a data grid to help analyze and classify resources.

关键词： Peer to peer computing Resource management Mobile computing Protocols Grid computing computer science Data engineering Wireless networks Internet Open source software

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