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GIS Spatial Data Integration Based on Grid computing

GIS Spatial Data Integration Based on Grid Computing

引用

international conference on Computer Modeling and Simulation, ICCMS

作者： Lin Zhou Lin Wan Faculty of Information Engineering China University of Geoscience Wuhan China

Multi-source heterogeneous spatial data has been the obstacle of the spatial information sharing. So, in the network environment, how to integrate multi-sources heterogeneous spatial data has become a hot and difficult problem of GIS. This article aimed to solve the problem by grid computing technology, and put forward a model of multi-sources heterogeneous spatial data integration based on it. Use Globus Toolkit and OGSA-DAI to establish a heterogeneous data integration platform. Based on the platform, various heterogeneous data sources can be connected seamlessly. Each data source node can be registered on it for data sharing. The platform can also harmonize and manage all data source nodes, and provide users with a unified and transparent access interface. With the existing grid middleware tool Globus Toolkit and OGSA-DAI, grid development tools can be packaged, thereby shielding the complexity of grid theory and the tools. Integrate a number of distribution, independent heterogeneous data sources into a specific environment, realize the unification inquirment on these multi-database systems, shielding the differences of database structures, operating environments, network distribution and concrete physical location to ensure the independence of each database node and data security.

关键词： Geographic Information Systems Grid computing Computer networks distributed computing Spatial databases Data engineering Geology Scattering Web and internet services Isolation technology

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A Locality-Aware Publish/Subscribe Scheme for High Level Architecture on Structured Peer-to-Peer networks

A Locality-Aware Publish/Subscribe Scheme for High Level Arc...

引用

IEEE international conference on Computational Science and Engineering, CSE

作者： Wei-Chao Chang Shih-Hsiang Lo Kuan-Chou Lai Kuan-Ching Li Yeh-Ching Chung Department of Computer Science National Tsing Hua University Hsinchu Taiwan Department of Computer and Information Science National Taichung University Taichung Taiwan Department of Computer Science and Information Engineering Providence University Taichung Taiwan

High Level Architecture (HLA) is a distributed simulation architecture which is applied to many simulation environments. In most of these environments, the simulation entities (called the federate in HLA) communicate with each other by interconnected local area networks (LANs). Due to the communications among federates which are in the same LAN have shorter latency and higher bandwidth, this paper proposes a message publish/subscribe scheme of HLA based on structured peer-to-peer overlay according to the principle of locality, by increasing the size of affordable federates and the size of workload by using the same hardware environment. Moreover, the run-time infrastructure (RTI) is implemented in accordance with HLA for performance evaluation. Experimental results show that the proposed scheme improves the performance of simulations.

关键词： Lead Peer to peer computing Computer architecture Computational modeling Servers Local area networks Routing

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Multi-Source Scheduling in Streaming Erasure-Coded Video over P2P networks

Multi-Source Scheduling in Streaming Erasure-Coded Video ove...

引用

international conference on Peer-to-Peer computing

作者： M. L. Ma J. Y. B. Lee

The efficient scheduling of streaming data delivery in a peer-to-peer (P2P) network is a hard problem due to the Internet's lack of support for resource allocation and performance guarantees. In particular, the bandwidth resources available to a peer is constantly in flux and the future bandwidth availability is very difficult, if not impossible, to predict accurately. This work proposes to tackle this problem from a different angle. We investigate the use of erasure codes to encode the media data and then schedule multiple peers to stream the encoded data simultaneously to a receiver. By exploiting the order-invariant property of erasure codes this approach enables the sending peers to fully utilize their available bandwidth resources and yet does not need to estimate or predict their bandwidth availability. Moreover, we develop distributed scheduling algorithms to juxtapose the data transmissions from multiple peers so that the coding and storage complexities can be kept at practical level in scaling up the system. This paper describes the motivation, architecture, and design of the proposed coding/scheduling algorithms; develops a performance model to characterize the algorithms' performance bounds; and evaluates them through simulation as well as experiments.

关键词： Encoding Media Decoding Bandwidth Peer to peer computing Scheduling algorithm Availability

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Cooperative Routing Approach for ISP-Provided Content Delivery Service Using Hierarchical DHT

Cooperative Routing Approach for ISP-Provided Content Delive...

引用

IEEE international conference on High Performance computing and Communications (HPCC)

作者： Kyounghee Jung Dohyun Kim Younghee Lee Division of Media Technology Media Business Center KT Corporation South Korea Department of Information and Communication Engineering KAIST South Korea Department of Computer Science KAIST South Korea

This paper suggests ISP-provided content delivery service that provides fine-grained locality and exploits network status in content routing to overcome the dilemma from current content delivery technology like P2P. Hierarchical DHT provides an efficient and scalable distributed data service architecture and it is able to achieve high level of locality over ISP network which has a hierarchical topology in general. However, simple implementation of it into ISP network imposes several issues: long query length, overloading, and the ignorance of network status in routing which is one of strengths of ISP-provided service. In order to resolve the aforementioned issues, this paper introduces network domain heuristic based merging and dynamic cost-based cooperative routing that exploits service load and network cost together. According to simulation based evaluation, our proposed approach achieves around 40% shorter latency in both delivery and query. Furthermore, it can alleviate overloading and content delivery through contested path efficiently.

关键词： Routing Peer to peer computing Merging Network topology Topology IP networks Servers

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Amoeba-Based Knowledge Discovery System

Amoeba-Based Knowledge Discovery System

引用

The Third international Joint conference on Computational Science and Optimization(第三届计算科学与优化国际大会 CSO 2010)

作者： Toshinori Munakata Masashi Aono Masahiko Hara Computer and Information Science Department Cleveland State niversityCleveland OH 44115 USA RIKEN-HYU Collaboration Research Center Advanced Science Institute RIKENWako Saitama 351-0198 Ja

We propose an amoeba-based knowledge discovery or data mining system, that is implemented using an amoeboid organism and an associated control system. The amoeba system can be considered as one of the new non-traditional computing paradigms, and it can perform intriguing, massively parallel computing that utilizes the chaotic behavior of the amoeba. Our system is a hybrid of a traditional Anowledge-based unit implemented on an ordinary computer and an amoeba-based search unit, with an interface of an optical control unit. The solutions in our system can have one-to-one mapping to solutions of other well known areas such as neural networks and genetic algorithms. This mapping feature allows the amoeba to use and apply techniques developed in other areas. Various forms of knowledge discovery processes are introduced. Also, a new type of knowledge discovery technique, called "autonomous meta-problem solving," is discussed.

关键词： Amoeba-based computing knowledge discovery data mining new computing paradigm

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Communication time models on fat-tree networks

Communication time models on fat-tree networks

引用

international conference on Advanced Computer Theory and Engineering, ICACTE

作者： Yufei Lin Xinhai Xu Yisong Lin National Laboratory of Parallel and Distributed Processing Computer School National University of Defense Technology Changsha Hunan China

ISBN: (纸本)9781424465392;9781424465422

With the growth of supercomputer's scale, the communication time during executing is increasing. This phenomenon arouses the architecture researchers' interests. In this paper, based on the fat-tree topology, which is widely used in Infiniband, we present an one-to-all broadcast communication time model. After classifying applications into two kinds, we establish the ideal model and the bandwidth-limited model on the exponential-capacity binary fat-trees for the two kinds of applications. Through analyzing the models, we get the curves which describe the relationship between the communication time and the processor number. The conclusions we get in this paper can help system designers make better system design.

关键词： World Wide Web

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Improvement and Implementation of IDMEF Data Model

Improvement and Implementation of IDMEF Data Model

引用

international conference on Computer Modeling and Simulation, ICCMS

作者： Han Ming Dewu Xu Wei Chen Math Phys. & Inf. Eng. Coll. Zhejiang Normal Univ. Jinhua China

The rapidly increasing series of Internet-scale disrupted threat is a pressing problem for every organization that utilizes the network. Many research institutions focus on collaborative security, of which collaborative intrusion detection is an important component. Sharing data among widely distributed intrusion detection systems is essential. To this end, IDWG (intrusion detection working group) proposed a draft in IDMEF (intrusion detection message exchange format). This paper aims at improving the IDMEF data model to foster interoperability and to maximize extensibility the messages which represented in XML. This is expected to become a generally-useful type of data. Finally, it implements the new IDMEF data model in XML.

关键词： Data models Intrusion detection XML Computer networks Collaborative work Data security Information security Collaboration Physics computing Computational modeling

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A Unified Scheduling Framework Based on Virtual Timers for Selfish-Policy Shared Spectrum

A Unified Scheduling Framework Based on Virtual Timers for S...

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IEEE international conference on Communications (ICC)

作者： A. Attar N. Devroye H. Li V. C. M. Leung Department of Electrical and Computer engineering University of British Columbia Canada Department of Electrical and Computer engineering University of Illinois Chicago USA

The issue of efficiency and fairness in resource allocation will continue to be of significant importance in scheduler designs for future wireless systems. Of particular importance is the development of distributed techniques for achieving desired efficiency and fairness tradeoffs. We will focus on the the design of selfishly efficient and as well as different fair policies through the use of a virtual timer. This virtual timer unifies various previously considered fairness methods including Round-Robin, Max-Min and Proportional fairness, which are rigorously investigated. The performance of the presented techniques are compared using extensive simulations.

关键词： Resource management Processor scheduling Transmitters Communications Society Bandwidth Wireless communication Broadband communication Communication systems Peer to peer computing Intelligent networks

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Achieving Fair Throughput for TCP Flows in Multi-Hop Wireless Backhaul networks

Achieving Fair Throughput for TCP Flows in Multi-Hop Wireles...

引用

IEEE international conference on Communications (ICC)

作者： C.-W. Hsu T.-C. Hou Department of Electrical Engineering & Department of Communications Engineering National Chung Cheng University Chiayi Taiwan

The use of multihop wireless networks based on the 802.11 technology has been growing. The primary advantages of this approach are mature technology and ease of deployment. However, the fairness property provided by the 802.11 DCF (distributed coordination function) in a single hop environment has been shown to be non-existent in a multihop environment. For example, in the multihop wireless backhaul network, nodes that are more hops away from the gateway are starved by nodes that are closer to the gateway. This paper focuses on the fairness study when TCP flows are carried over wireless backhaul networks. By not modifying lower layer protocols, this work identifies TCP parameters that impact throughput fairness and proposes adjusting those parameters to reduce frame collisions and improve throughput fairness. With the aid of simple mathematical formulations and ns2 simulations, this study finds that the frame transmissions from each node can be effectively controlled by properly controlling the delayed ACK timer and using a suitable advertised window. For chain topology with long hops, the fairness index of our proposed method outperforms basic 802.11 DCF by over 90 percent. The proposed methods are simple and easy to deploy.

关键词： Throughput Spread spectrum communication Peer to peer computing Wireless LAN Wireless networks Delay effects Degradation Media Access Protocol Communications Society Paper technology

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Dynamic TinyOS: Modular and Transparent Incremental Code-Updates for Sensor networks

Dynamic TinyOS: Modular and Transparent Incremental Code-Upd...

引用

IEEE international conference on Communications

作者： Waqaas Munawar Muhammad Hamad Alizai Olaf Landsiedel Klaus Wehrle Computer Systems and Telematics Freie Universität Berlin Germany Distributed Systems Group RWTH Aachen University Germany

Long-term deployments of sensor networks in physically inaccessible environments make remote re-programmability of sensor nodes a necessity. Ranging from full image replacement to virtual machines, a variety of mechanisms exist today to deploy new software or to fix bugs in deployed systems. However, TinyOS - the current state of the art sensor node operating system - is still limited to full image replacement as nodes execute a statically-linked system-image generated at compilation time. In this paper we introduce Dynamic TinyOS to enable the dynamic exchange of software components and thus incrementally update the operating system and its applications. The core idea is to preserve the modularity of TinyOS, i.e. its componentization, which is lost during the normal compilation process, and enable runtime composition of TinyOS components on the sensor node. The proposed solution integrates seamlessly into the system architecture of TinyOS: It does not require any changes to the programming model of TinyOS and existing components can be reused transparently. Our evaluation shows that Dynamic TinyOS incurs a low performance overhead while keeping a smaller - up to one third - memory footprint than other comparable solutions.

关键词： Sensor systems Peer to peer computing Runtime Operating systems Virtual machining Wireless sensor networks Bandwidth Costs Joining processes Protocols

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