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2010 3rd international conference on Human-Centric computing, HumanCom 2010

作者： Fujiwara, Yuki Date, Susumu Ichikawa, Kohei Takemura, Haruo Graduate School of Information Science and Technology Osaka University Japan Cybermedia Center Osaka University Japan Osaka University Office for Information Infrastructure Design Japan

ISBN: (纸本)9781424475704

Recently, both networking and high-performance computing technologies have dramatically advanced. As a result, scientists can access large-scale data captured by scientific measurement devices with ease. Also, recent high-performance computing technologies such as the Grid and cloud computing have allowed scientists to use huge computational power harnessed on the Internet for their analysis of scientific data. However, visualization technology, which plays the role of great importance for scientists intuitively in understanding the analysis results of such scientific data, is not fully utilized so that it can benefit from recent high-performance and networking technologies although many sophisticated visualization technologies exists nowadays. One of such visualization technologies is SAGE (Scalable Adaptive Graphics Environment), which allows people to build an arbitrary size of a tiled display wall and is expected to be applied to scientific research. In this paper, we describe a multi-application controller for SAGE middleware, which we have developed, in the hope that it will help scientists perform their analysis on a wide-area distributed computing environment. The evaluation in the paper indicates the efficiency of completing a comparison task among multiple data is raised by our system. © 2010 IEEE.

关键词： Middleware

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A distributed location based service framework of ubiquitous computing

A distributed location based service framework of ubiquitous...

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international conference on networking and distributed computing

作者： Lv, Weifeng Wang, Fei Zhang, Yuan Zhu, Tongyu State Key Laboratory of Software Development Environment Beihang University Beijing China

ISBN: (纸本)9780769542072

Location based services (LBS) are very abundant in our society, which focus on providing users navigation information to make the travel more convenient. With the rapid development of evolving mobile technologies (3G, Wi-Fi, and IPv6), large amounts of data (infotainment, et al.) transmission comes true, which makes the sole navigation information seems tedious. Ubiquitous computing emphasizes the integration of computing and the environment, while the computer itself disappears from people's attention. In the ubiquitous computing model, people can access or even process information at any time or any place. In this paper, we propose a new kind of distributed location based service framework of ubiquitous computing. In our service, we can get various kinds of latest information (infotainment), extract their locations by location aware technology considering that there must be a related location in the information. The location-aware information is provided to users whenever they want. All the information sent to users has been filtered according to users' current locations and locations of the information. User can customize the categories of information to make sure he can get any preferred information but not only the navigation related ones, which makes users' travel more convenient and pleasant. A comprehensive experiment using real data has been conducted to demonstrate our service framework. © 2010 IEEE.

关键词： Location based services

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Video networking: Trends and challenges 10

Video networking: Trends and challenges

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Proceedings of the 8th international conference on Advances in Mobile computing and Multimedia

作者： Grecos, Christos Wang, Qi University of the West of Scotland AVCN Research Group School of Computing Paisley PA1 2BE United Kingdom

ISBN: (纸本)9781450304405

In this tutorial paper, we examine the H.264X family of standards for advanced, scalable or multiview video coding, the distributed video coding paradigm and the emerging H.265 standard. Detailed technical descriptions and insightful analysis are presented in each standard. The applications of selected video coding standards in emerging wireless networks are then introduced with an emphasis on scalable video streaming in multihomed mobile networks. Both research challenges and potential solutions are discussed along the description, and numerical results through simulations or experiments are provided to reveal the performances of selected coding standards and networking algorithms. Copyright © 2010 ACM.

关键词： Wireless networks

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international conference on computing in High Energy and Nuclear Physics (CHEP 2010)

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Journal of Physics: conference Series 2011年 331卷

作者： Simon C Lin Stella Shen Niko Neufeld Oliver Gutsche Marco Cattaneo Ian Fisk Bernd Panzer-Steindel Alberto Di Meglio Milos Lokajicek

The international conference on computing in High Energy and Nuclear Physics (CHEP) was held at Academia Sinica in Taipei from 18–22 October 2010. CHEP is a major series of international conferences for physicists and computing professionals from the worldwide High Energy and Nuclear Physics community, Computer Science, and Information Technology. The CHEP conference provides an international forum to exchange information on computing progress and needs for the community, and to review recent, ongoing and future activities. CHEP conferences are held at roughly 18 month intervals, alternating between Europe, Asia, America and other parts of the world. Recent CHEP conferences have been held in Prauge, Czech Republic (2009); Victoria, Canada (2007); Mumbai, India (2006); Interlaken, Switzerland (2004); San Diego, California(2003); Beijing, China (2001); Padova, Italy (2000) CHEP 2010 was organized by Academia Sinica Grid computing Centre. There was an international Advisory Committee (IAC) setting the overall themes of the conference, a Programme Committee (PC) responsible for the content, as well as conference Secretariat responsible for the conference infrastructure. There were over 500 attendees with a program that included plenary sessions of invited speakers, a number of parallel sessions comprising around 260 oral and 200 poster presentations, and industrial exhibitions. We thank all the presenters, for the excellent scientific content of their contributions to the conference. conference tracks covered topics on Online computing, Event Processing, Software Engineering, Data Stores, and Databases, distributed Processing and Analysis, computing Fabrics and networking Technologies, Grid and Cloud Middleware, and Collaborative Tools. The conference included excursions to various attractions in Northern Taiwan, including Sanhsia Tsu Shih Temple, Yingko, Chiufen Village, the Northeast Coast National Scenic Area, Keelung, Yehliu Geopark, and Wulai Aboriginal Village, as

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Fast PGAS implementation of distributed graph algorithms 10

Fast PGAS implementation of distributed graph algorithms

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Proceedings of the 2010 ACM/IEEE international conference for High Performance computing, networking, Storage and Analysis

作者： Cong, Guojing Almasi, George Saraswat, Vijay IBM TJ Watson Research Center 1101 Kitchawan Road Yorktown Heights NY 10598 United States

ISBN: (纸本)9781424475575

Due to the memory intensive workload and the erratic access pattern, irregular graph algorithms are notoriously hard to implement and optimize for high performance on distributed-memory systems. Although the PGAS paradigm proposed recently improves ease of programming, no high performance PGAS implementation of large-scale graph analysis is known. We present the first fast PGAS implementation of graph algorithms for the connected components and minimum spanning tree problems. By improving memory access locality, compared with the naive implementation, our implementation exhibits much better communication efficiency and cache performance on a cluster of SMPs. With additional algorithmic and PGASspecific optimizations, our implementation achieves significant speedups over both the best sequential implementation and the best single-node SMP implementation for large, sparse graphs with more than a billion edges. © 2010 IEEE.

关键词： Memory architecture

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Analysis of internal network requirements for the distributed Nordic Tier-1

Analysis of internal network requirements for the distribute...

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17th international conference on computing in High Energy and Nuclear Physics (CHEP)

作者： Behrmann, G. Fischer, L. Gamst, M. Gronager, M. Kleist, J. NDGF Kastruplundgade 22 1 DK-2770 Kastrup Denmark NORDUnet DK-2770 Kastrup Denmark Tech Univ Denmark Dept Engn Management DK-2800 Lyngby Denmark Aalborg Univ Dept Comp Sci DK-9220 Aalborg Denmark NDGF DK-9220 Aalborg Denmark

The Tier-1 facility operated by the Nordic DataGrid Facility (NDGF) differs significantly from other Tier-1s in several aspects: It is not located at one or a few locations but instead distributed throughout the Nordic, it is not under the governance of a single organisation but but is instead build from resources under the control of a number of different national organisations. Being physically distributed makes the design and implementation of the networking infrastructure a challenge. NDGF has its own internal OPN connecting the sites participating in the distributed Tier-1. To assess the suitability of the network design and the capacity of the links, we present a model of the internal bandwidth needs for the NDGF Tier-1 and its associated Tier-2 sites. The model takes the different type of workloads into account and can handle different kinds of data management strategies. It has already been used to dimension the internal network structure of NDGF. We also compare the model with real life data measurements.

关键词： Information management

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Large scale cooperative multiagent system based on semantic P2P network

Large scale cooperative multiagent system based on semantic ...

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international conference on networking and distributed computing

作者： Huang, Lican Institute of Networking and Distributed Computing Zhejiang Sci-Tech. University HangZhou 310018 China

ISBN: (纸本)9780769542072

Multiagent plays an important role in various applications. As the Internet becomes prerequisite of human life, large scale Multiagent systems on the Internet become more and more important. However, large scale multiagent systems encounter many big issues such as scalability and inter-operability. This paper presents a different approach of large scale multiagent system based on semantic P2P Network-Virtual Hierarchical Tree Grid Organizations (VIRGO) in mathematic terms. Other than unstructured and DHT-based structured P2P networks, VIRGO keeps the semantic meanings of the nodes according to their roles in the communities. In VIRGO approach, the agents are identified as domain names classified by the semantic meaning of roles in the organizations. The agents construct the VIRGO network by joining the virtual groups with the same names as their domains. We proof by mathematics that in this approach each agent has a path to communicate with any other agent and the performance is effective as maximin hops less than log(N), where N is total number of agents. The performance bottle-neck of treelike topology can be avoided by cache policies. Here, we also introduce a SQL-like language for inter-operation among agents. As an illustration example, cooperative e-Business based on VIRGO in which lots of enterprisers are formed into vertical virtual organizations is described. © 2010 IEEE.

关键词： Semantics

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DFSB: A prototype of distributed storage system based on LDPC

DFSB: A prototype of distributed storage system based on LDP...

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international conference on networking and distributed computing

作者： Wu, Teng Tan, Luchen Li, Xiangxue Guo, Baoan Zheng, Dong School of Information Security Engineering Shanghai JiaoTong University China Institute of Digital Technology Aisino Corporation Inc China Hangzhou Key Lab. of E-Business and Information Security Hangzhou Normal University China

ISBN: (纸本)9780769542072

In this paper we present a prototype of distributed storage system based on LDPC called distributed File StrongBox(DFSB). DFSB is an archive-oriented system, and it is designed to guarantee high availability and security of distributed storage. This high availability is achieved through novel application of LDPC which is normally applied in communication protocols. We use LDPC to calculate redundant data blocks, which takes the place of RS code used in RAID6. Comparing with RS code, LDPC has higher probability of tolerating more failure blocks in distributed storage system for its Shanno Limit approaching property. We also consider the time overhead of searching users' information, which increases as a logarithmic function user group scale. To get constant time overhead, we propose an innovative indexing method using 16-tree. In addition, we provide an improved protocol for user authentication to protect communications between authorized clients and servers from some existed attacking. © 2010 IEEE.

关键词： Availability

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Fragment maintenance in distributed storage systems

Fragment maintenance in distributed storage systems

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international conference on Multimedia Information networking and Security

作者： Yang, Xiaoyuan Zhu, Shuaishuai Key Laboratory of Network and Information Security of APF Engineering College of APF Xi'an 710086 China Key Laboratory of Network and Information Security Ministry of Education Xidian University Xi'an 710071 China

ISBN: (纸本)9780769542584

How to efficiently enhance fault-tolerance and data access availability are the major problems to solve in distributed storage system. Data fragment maintenance is an essential part of distributed storage systems. Byzantine quorum system is a typical system model in maintaining data availability. The paper presents a novel fragment verifying and repairing algorithm built in Byzantine quorum system with the mechanism of fragment verifier generation and recovery. Different data redundancy schemes are considered when applying our algorithm. According to our analysis, the algorithm can greatly reduce computing complexity and network load in probing and returning an available quorum. More importantly, processing simplification is considered. © 2010 IEEE.

关键词： Fault tolerance

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SCOPE: A prototype for spontaneous P2P social networking

SCOPE: A prototype for spontaneous P2P social networking

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2010 8th IEEE international conference on Pervasive computing and Communications Workshops, PERCOM Workshops 2010

作者： Mani, Mehdi Nguyen, Anh-Minh Crespi, Noel Wireless Networks and Multimedia Services Department Institut TELECOM Telecom SudParis Evry France

ISBN: (纸本)9781424466054

This paper explores the architecture and implementation details of SCOPE platform. SCOPE is our prototype for spontaneous P2P social networking. It provides customized social networking application for local use cases. Below the network level, SCOPE relies on 802.11 ad-hoc mode and needs no infrastructure. SCOPE follows the hierarchical P2P model. Some nodes with higher computing capability become supernodes. super-nodes form an overlay and provide the distributed data management system for the P2P social network. Client nodes (CNs) connect to super-nodes and rely on them for sharing their contents or accessing to the shared information. We have developed What's UP as our client agent tool which provide a vast range of applications from simple textJlink sharing to P2P IP Telephony. © 2010 IEEE.

关键词： IEEE Standards

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