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检索条件"任意字段=IEEE International Symposium on Parallel and Distributed Processing with Applications"

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Modeling malware propagation in Gnutella type peer-to-peer networks 20

Modeling malware propagation in Gnutella type peer-to-peer n...

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20th ieee international parallel and distributed processing symposium, IPDPS 2006

作者： Ramachandran, Krishna Sikdar, Biplab Department of Electrical Computer and Systems Engineering Rensselaer Polytechnic Institute Troy NY 12180 United States

ISBN: (纸本)1424400546

A key emerging and popular communication paradigm, primarily employed for information dissemination, is peer-to-peer (P2P) networking. In this paper, we model the spread of malware in decentralized, Gnutella type of peer-to-peer networks. Our study reveals that the existing bound on the spectral radius governing the possibility of an epidemic outbreak needs to be revised in the context of a P2P network. We formulate an analytical model that emulates the mechanics of a decentralized Gnutella type of peer network and study the spread of malware on such networks. We show analytically, that a framework which does not incorporate the behavioral characteristics of peers ends up over estimating the epidemic threshold metric, R0. This in turn results in false positives, an undesirable feature. We also characterize the conditions under which the network may reach a malware free equilibrium and validate our theoretical results with numerical simulations. © 2006 ieee.

关键词： parallel processing systems

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A hybrid processing element based reconfigurable architecture for hashing algorithms

A hybrid processing element based reconfigurable architectur...

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22nd ieee international parallel and distributed processing symposium (IPDPS 2008)

作者： Sreedharan, Deepak Akoglu, Ali Univ Arizona Dept Elect & Comp Engn Reconfigurable Comp Lab Tucson AZ 85721 USA

ISBN: (纸本)9781424416936

Given the high computation demand for cryptography and hashing algorithms there is a need to develop flexible and high performance architectures. This paper proposes a methodology to derive processing elements as a starting point for the state-of-the-art reconfigurable computing and presents a case-study to show that application-specific reconfigurable computing has performance benefits close to fully-custom designs in addition to the intended reconfigurablity. We use hashing algorithms as a case study to propose a novel application-specific reconfigurable architecture based on a balanced mixture of coarse and fine grained processing elements with a tuned interconnect structure. For that purpose we introduce a methodology to derive hybrid grained processing elements and expose both fine and coarse grain parallelism based on a new common and recurring computation pattern extraction tool. After extracting the recurring patterns between SHA-1 and MD5 algorithms, we derive the unified interconnect architecture tailored to the control data dependencies of both the algorithms. That way the amount of reconfiguration on the proposed architecture when switching between the two algorithms is minimized. The proposed reconfigurable architecture is synthesized using the Synopsys design compiler targeted at TSMC 250 nm libraries. We compare its performance with ASIC technology on SHA-1 and MD5 algorithms. Results show that the proposed architecture which is reconfigurable between the two hashing algorithms has frequency of operation close to ASIC implementation of the individual algorithms for iterative and pipelined versions and results with 35% savings in area.

关键词： Reconfigurable architectures

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Design and evaluation of a parallel edge server invocation protocol for transactional applications over the web

Design and evaluation of a parallel edge server invocation p...

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international symposium on applications and the Internet

作者： Romano, P Quaglia, F Ciciani, B Univ Roma La Sapienza DIS Rome Italy

ISBN: (纸本)0769525083

parallel invocation of edge servers within a Web infrastructure has been shown to provide benefits, in terms of system responsiveness, for both content delivery applications and non-transactional Web services. This is achieved thanks to the exploitation of path-diversity proper of multi-hop networks over the Internet, which typically reduces the likelihood of client perceived link congestion. In this work we address parallel invocation of geographically spread edge servers in the context of transactional Web-based applications. Actually, parallel invocation protocols are not trivial for this type of applications, since we need to deal with a set of issues not present in classical content delivery, applications, such as (i) non-idempotent business logic and (ii) increase of the workload on the data centers. In this paper we propose a simple and lightweight parallel invocation protocol for distributed transactions over the Web, which addresses all those issues in a scalable manner by requiring no form of coordination among (geographically spread) edge servers. The results of a simulation study are also reported to show the advantages from our protocol in terms of user-perceived system responsiveness.

关键词： Network protocols

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A fast GPU algorithm for graph connectivity

A fast GPU algorithm for graph connectivity

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2010 ieee international symposium on parallel and distributed processing, Workshops and Phd Forum, IPDPSW 2010

作者： Soman, Jyothish Kishore, Kothapalli Narayanan, P.J. IIIT-Hyderabad Gachibowli Hyderabad Andhra Pradesh 500032 India

ISBN: (纸本)9781424465347

Graphics processing units provide a large computational power at a very low price which position them as an ubiquitous accelerator. General purpose programming on the graphics processing units (GPGPU) is best suited for regular data parallel algorithms. They are not directly amenable for algorithms which have irregular data access patterns such as list ranking, and finding the connected components of a graph, and the like. In this work, we present a GPU-optimized implementation for finding the connected components of a given graph. Our implementation tries to minimize the impact of irregularity, both at the data level and functional level. Our implementation achieves a speed up of 9 to 12 times over the best sequential CPU implementation. For instance, our implementation finds connected components of a graph of 10 million nodes and 60 million edges in about 500 milliseconds on a GPU, given a random edge list. We also draw interesting observations on why PRAM algorithms, such as the Shiloach- Vishkin algorithm may not be a good fit for the GPU and how they should be modified. © 2010 ieee.

关键词： Graphics processing unit

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Improving efficiency and performance of distributed file-systems

Improving efficiency and performance of distributed file-sys...

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7th ieee international symposium on Networking Computing and applications, NCA 2008

作者： Galizia, Micah Lutfiyya, Hanan Department of Computer Science University of Western Ontario London ON N6A 5B7 Canada

ISBN: (纸本)9780769531922

This paper presents a distributed file-system for the present day medium-sized network. Existing servers and workstations pool their unused storage resources to form a communal share. Erasure codes provide fault tolerance and eliminate the need for replication. Middleware libraries facilitate object routing on an overlay network. © 2008 ieee.

关键词： Middleware

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GridIS: An incentive-based grid scheduling

GridIS: An incentive-based grid scheduling

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19th ieee international parallel and distributed processing symposium, IPDPS 2005

作者： Xiao, Lijuan Zhu, Yanmin Ni, Lionel M. Xu, Zhiwei Software Division Institute of Computing Technology Chinese Academy of Sciences Beijing 100080 China Graduate School Chinese Academy of Sciences Beijing 100039 China Department of Computer Science Hong Kong University of Science and Technology Clearwater Bay Kowloon Hong Kong Institute of Computing Technology Chinese Academy of Sciences Beijing 100080 China

ISBN: (纸本)0769523129

In a grid computing environment, resources are autonomous, wide-area distributed, and what's more, they are usually not free. These unique characteristics make scheduling in a self-sustainable and market-like grid highly challenging. The goal of our work is to build such a global computational grid that every participant has enough incentive to stay and play in it. There are two parties in the grid: resource consumers and resource providers. Thus the performance objective of scheduling is two-fold: for consumers, high successful execution rate of jobs, and for providers, fair allocation of benefits. We propose an incentive-based grid scheduling, GridIS, which is composed of a P2P decentralized scheduling framework and incentive-based scheduling algorithms. Simulation results show that GridIS guarantees the incentive of every participant to a satisfying extent.

关键词： distributed computer systems

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Secure distributed computing on a Java Card™* Grid

Secure distributed computing on a Java Card™* Grid

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19th ieee international parallel and distributed processing symposium, IPDPS 2005

作者： Chaumette, Serge Grange, Pascal Karray, Achraf Sauveron, Damien Vignèras, Pierre Laboratoire Bordelais de Recherche en Informatique UMR 5800 Université Bordeaux 1 351 cours de la Libération 33405 Talence Cedex France University of Sfax ENIS Tunisia LaBRI Bordeaux France LMSI Limoges France

ISBN: (纸本)0769523129

More and more pieces of hardware are being connected to the Internet every day. Technologies such as Bluetooth or Wi-Fi make this evolution even faster. To make these equipments cooperate and communicate with each other several paradigms such as mobile codes, mobile agents and remote procedure calls are particularly well adapted. These paradigms enable to execute a code that is either coming from somewhere over the network, or that is local but managed remotely. Security is then one of the main concerns that has to be dealt with. We believe that smart cards, and more precisely Java Cards can help to cope with this challenge. This is a position paper where we present the first results obtained on a Java Card based platform that we have set up for experimentation purpose. These experiments raise many questions we are currently working on.

关键词： distributed computer systems

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Protocols for fault-tolerant distributed-shared-memory on the SOME-bus multiprocessor architecture 16

Protocols for fault-tolerant distributed-shared-memory on th...

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16th international parallel and distributed processing symposium, IPDPS 2002

作者： Hecht, D. Katsinis, C. Electrical and Computer Engineering Drexel University PhiladelphiaPA19104 United States

ISBN: (纸本)0769515738

The Simultaneous Optical Multiprocessor Exchange Bus (SOME-Bus) is a low-latency, high-bandwidth interconnection network that directly links arbitrary pairs of processor nodes without contention, and can efficiently interconnect over one hundred nodes. Each node has a dedicated output channel and an array of receivers, with one receiver dedicated to every other node's output channel. The SOME-Bus eliminates the need for global arbitration and provides bandwidth that scales directly with the number of nodes in the system. Under the distributed Shared Memory (DSM) paradigm, the SOME-bus allows strong integration of the transmitter, receiver and cache controller hardware to produce a highly integrated system-wide cache coherence mechanism. Backward Error Recovery fault-tolerance techniques can rely on DSM data replication and SOME-Bus broadcasts with little additional network traffic and corresponding performance degradation. This paper presents three protocols for fault-tolerant DSM and uses simulation to examine the performance of the protocols on the SOME-Bus multiprocessor architecture. © 2002 ieee.

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A distributed Speech Algorithm for Large Scale Data Communication Systems 28

A Distributed Speech Algorithm for Large Scale Data Communic...

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28th ieee international parallel & distributed processing symposium Workshops (IPDPSW)

作者： Xiong, Naixue Tong, Guoxiang Guo, Wenzhong Tan, Jian Wu, Guanning Hubei Univ Educ Hubei Coinnovat Ctr Basic Educ Technol Serv Sch Comp Sci Wuhan Hubei Peoples R China Univ Shanghai Sci & Technol Sch Optelect & Comp Engn Shanghai Key Lab Modern Opt Syst Shanghai Peoples R China Fuzhou Univ Coll Math & Comp Sci Fuzhou 350108 Peoples R China Univ Shanghai Sci & Technol Sch Opt Elect & Comp Engn Shanghai Peoples R China

ISBN: (纸本)9781479941162

Data-driven computing and using data for strategic advantages are exemplified by communication systems, and the speech intelligibility in communication systems is generally interrupted by interfering noise. This interference comes from the environmental noise, so we can reduce them intelligibility by masking the interested signal [1, 2]. An important work in communication systems is to extract speech from noisy speech and inhibiting background noise. In this paper, the subspace algorithm theory is introduced into a speech noise reduction system. We first analyze the principle of LMS adaptive speech noise reduction algorithm with the subspace algorithm, and then, we merge the subspace algorithm into the VS-LMS algorithm and propose a combined algorithm for an adaptive speech noise reduction system. Furthermore, we analyze the combined algorithm, which can decrease musical noise, as well as generate a suitable step-size factor to resolve the contradiction. This issue cannot be resolved by the current LMS algorithm [31], which has less convergence speed and larger residual noise than our system. Our simulation results demonstrate that our algorithm can get 3 to 10 times better than original algorithm in low SNR (-5 similar to 0db) and high SNR (0 similar to + 5db).

关键词： Adaptive Filter Subspace noise reduction algorithm Speech noise reduction system digital signal processing (DSP) LMS (least mean square)

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The applicability of adaptive control theory to QoS design: Limitations and solutions

The applicability of adaptive control theory to QoS design: ...

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19th ieee international parallel and distributed processing symposium, IPDPS 2005

作者： Wu, Keqiang Lilja, David J. Bai, Haowei Electrical and Computer Engineering University of Minnesota Minneapolis MN 55455 United States Honeywell Aerospace Electronic Systems 3660 Technology Drive Minneapolis MN 55418 United States

ISBN: (纸本)0769523129

Due to the increasing complexity, the behavior of large-scale distributed systems becomes difficult to predict. The ability of on-line identification and autotuning of adaptive control systems has made the adaptive control theoretical design an attractive approach for quality of service (QoS) guarantee. However, there is an inherent constraint in adaptive control systems, i.e. a conflict between asymptotically good control and asymptotically good parameter estimates. This paper addresses these limitations via sensitivity analysis. The simulation study demonstrates that the adaptive control theoretical design depends on the excitation signal, environment uncertainty, and a priori knowledge on the system. In addition, this paper proposes an adaptive dual control framework for mitigating these constraints in QoS design. By incorporating the existing uncertainty of the on-line prediction into the control strategy, the dual adaptive control framework optimizes the tradeoff between the control goal and the uncertainty.

关键词： distributed database systems

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