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International Symposium on Parallel Architectures, Algorithms, and Programming

作者： Dong, Guoxing Chen, Kai Zhu, Erzhou Zhang, Yichao Qi, Zhengwei Guan, Haibing School of Software Shanghai Key Laboratory of Scalable Computing and Systems Shanghai Jiaotong University Shanghai 200240 China School of Information Security Engineering Shanghai Key Laboratory of Scalable Computing and Systems Shanghai Jiaotong University Shanghai 200240 China Department of Computer Science and Engineering Shanghai Key Laboratory of Scalable Computing and Systems Shanghai Jiaotong University Shanghai 200240 China

ISBN: (纸本)9780769543123

GPUs are many-core processors with tremendous computational power. However, as automatic parallelization has not been realized yet, developing high-performance parallel code for GPUs is still very challenging. The paper presents a novel translation framework designed for virtual execution environment based on CPU/GPU architecture. It addresses two major challenges of taking advantage of general purpose computation on graphics processing units (GPGPU) to improve performance: no rewriting the existing source code and resolving binary compatibility issues between different GPUs. The translation framework uses semi-automatic parallelization technology to port existing code to explicitly parallel programming models. It not only offers a mapping strategy from X86 platform to CUDA programming model, but also synchronizes the execution between the CPU and the GPUs. The input to our translation framework is parallelizable part of the program within binary code. With an additional information related to the parallelizable part, the translation framework transforms the sequential code into PTX code and execute it on GPUs. Experimental results on several programs from CUDA SDK Code Samples and Parboil Benchmark Suite show that our translation framework could achieve very high performance, even up to several tens of times speedup over the X86 native version. © 2010 IEEE.

关键词： Graphics processing unit

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Parallel matrix-matrix multiplication based on HPL with a GPU-accelerated PC cluster

Parallel matrix-matrix multiplication based on HPL with a GP...

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International Conference on Networking and computing

作者： Wang, Qin Ohmura, Junichi Axida, Shan Miyoshi, Takefumi Irie, Hidetsugu Yoshinaga, Tsutomu University of Electro-Communications Graduate School of Information Systems Department of Information Network Systems Laboratory for Network Computing 1-5-1 Chofugaoka Chofu-shi 182-8585 Tokyo Japan

ISBN: (纸本)9780769542775

In this paper, we propose an approach for significantly improving the performance of parallel matrix-matrix multiplication using a GPU-accelerated cluster. For one node, we implement a CPUs-GPU parallel double-precision general matrix-matrix multiplication (dgemm) operation and achieve a performance improvement of 32% as compared to the GPU-only case and 56% as compared to the CPUs-only case. For the entire cluster, we use the overlap GPU acceleration solution to high-performance Linpack (HPL), which eliminates the close dependency between the LU decomposition and the dgemm operation, and achieve a performance improvement of 17% as compared to the flat GPU acceleration case. © 2010 IEEE.

关键词： Program processors

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Integration of global and local information in videos for key frame extraction 11

Integration of global and local information in videos for ke...

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11th IEEE International Conference on information Reuse and Integration, IRI 2010

作者： Liu, Dianting Shyu, Mei-Ling Chen, Chao Chen, Shu-Ching Department of Electrical and Computer Engineering University of Miami Coral Gables FL 33124 United States Distributed Multimedia Information Systems Laboratory School of Computing and Information Sciences Florida International University Miami FL 33199 United States

ISBN: (纸本)9781424480975

Key frame extraction methods aim to obtain a set of frames that can efficiently represent and summarize video contents and be reused in many video retrieval-related applications. An effective set of key frames, viewed as a high-quality summary of the video, should include the major objects and events of the video, and contain little redundancy and overlapped content. In this paper, a new key frame extraction method is presented, which not only is based on the traditional idea of clustering in the feature extraction phase but also effectively reduces redundant frames using the integration of local and global information in videos. Experimental results on the TRECVid 2007 test video dataset have demonstrated the effectiveness of our proposed key frame extraction method in terms of the compression rate and retrieval precision. © 2010 IEEE.

关键词： Integration

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Attribute-Based Signature with Policy-and-Endorsement Mechanism

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Journal of Computer Science & Technology 2010年第6期25卷 1293-1304页

作者：王怀习朱岩冯荣权 Stephen S.Yau LMAM School of Mathematical SciencesPeking University Electronic Engineering Institute Institute of Computer Science and Technology Peking University Key Laboratory of Network and Software Security Assurance (Peking University) Ministry of Education Information Assurance Center and School of Computing Informatics and Decision Systems Engineering Arizona State University

In this paper a new signature scheme,called Policy-Endorsing Attribute-Based Signature,is developed to correspond with the existing Ciphertext-Policy Attribute-Based *** signature provides a policy-and-endorsement *** this mechanism a single user,whose attributes satisfy the predicate,endorses the *** signature allows the signer to announce his endorsement using an access policy without having to reveal the identity of the *** security of this signature,selfless anonymity and existential unforgeability,is based on the Strong Diffie-Hellman assumption and the Decision Linear assumption in bilinear map groups.

关键词： cryptography fine-grained access control attribute-based signature policy-and-endorsement selfless anonymity existential unforgeability

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Some thoughts on the legal background of the continuously increasing privacy risk in information systems and on how to deal with it

Some thoughts on the legal background of the continuously in...

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24th IEEE International Conference on Advanced information Networking and Applications Workshops, WAINA 2010

作者： Quirchmayr, Gerald Wills, Chrsitopher C. University of Vienna Department of Distributed and Multimedia Systems Vienna Austria University of South Australia School of Computer and Information Science Mawson Lakes Australia Kingston University of London Faculty of Computing Information Systems and Mathematics Kingston Upon Thames United Kingdom

ISBN: (纸本)9780769540191

This paper tries to give an overview of the rising concerns raised by the of privacy protection that is associated with the European Data Retention Directive. After relating this risk to the requirements as stated in the European Data Protection Directive, an approach for a security-integrated view on the design of information systems is discussed. The paper then finishes with an outlook on the possible impact on IT governance. © 2010 IEEE.

关键词： information systems

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A purpose based access control in XML databases system

A purpose based access control in XML databases system

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International Conference on Network and System Security

作者： Sun, Lili Jururajin, Raj Wang, Hua Sriprakash, Sri Department of Mathematics and Computing University of Southern Queensland Toowoomba Australia School of Information Systems University of Southern Queensland Toowoomba Australia Bacterial Pathogenesis Laboratory Queensland Institute of Medical Research Brisbane Australia

ISBN: (纸本)9780769541594

With the growing importance of privacy in data access, much research has been done on the privacy protecting technology in recent years. Developing an access control model and related mechanisms to support a selective access data become important. The extensible markup language (XML) is rapidly emerging as the new standard language for semi-structured data representation and exchange on the Internet. And now more and more information is distributed in XML format. In this article, we present a comprehensive approach for privacy preserving access control based on the notion of purpose. In our model, purpose information associated with a given data elements in an XML document specifies the intended use of the data elements. An important issue addressed in this article is the granularity of data labeling for data elements in XML documents and tree databases with which purposes can be associated. We address this issue in XML databases and propose different labeling schemes for XML documents. We also propose an approach to represent purpose information to support access control based on purpose information. Our proposed solution relies on usage access control (UAC) models as well as the components which based on the notions of the purpose information used in subjects and objects. Finally, comparisons with related works are analysed. © 2010 IEEE.

关键词： XML

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A multimedia data management approach with GeM-Tree

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Journal of Multimedia 2010年第4期5卷 302-309页

作者： Chatterjee, Kasturi Chen, Shu-Ching Distributed Multimedia Information Systems Laboratory School of Computing and Information Sciences Florida International University Miami FL 33199 United States State Key Laboratory of Software Engineering Wuhan University 430072 China

In this paper, we propose a multimedia data management framework using GeM-Tree. GeM-Tree is a multidimensional tree-based index structure which provides a generalized framework to organize and retrieve images and videos seamlessly. In addition to supporting different multimedia data types and diverse representations, the proposed data management framework supports varied multimedia retrieval strategies like content-based image and video retrieval, mixed multimedia data retrieval where crosssimilarity between images and videos is considered, regionbased retrieval, etc. The framework embeds a high-level semantic relationship between multimedia data objects with a construct called Hierarchical Markov Model Mediator via a novel affinity promotion technique to improve query result relevance manifold. Extensive experiments were conducted with different multimedia data types possessing varied representations, different retrieval approaches, and different data sizes. The encouraging results demonstrate a potential solution to the important and complex issue of managing a large volume of multimedia data. © 2010 Academy Publisher.

关键词： Content based retrieval

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A Taxonomy of Autonomic Application Management in Grids

A Taxonomy of Autonomic Application Management in Grids

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International Conference on Parallel and distributed systems (ICPADS)

作者： Mustafizur Rahman Rajiv Ranjan Rajkumar Buyya Cloud Computing and Distributed Systems Laboratory Department of Computer Science and Software Engineering University of Melbourne Australia Service Oriented Computing Research Group School of Computer Science and Engineering University of New South Wales Australia

In this paper, we propose a taxonomy that characterizes and classifies different components of autonomic application management in Grids. We also survey several representative Grid systems developed by various projects world-wide to demonstrate the comprehensiveness of the taxonomy. The taxonomy not only highlights the similarities and differences of state-of-the-art technologies utilized in autonomic application management from the perspective of Grid computing, but also identifies the areas that require further research initiatives.

关键词： Monitoring Resource management Taxonomy Processor scheduling Decision making Dynamic scheduling

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A Particle Swarm Optimization-Based Heuristic for Scheduling Workflow Applications in cloud computing Environments

A Particle Swarm Optimization-Based Heuristic for Scheduling...

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International Conference on Advanced information Networking and Applications (AINA)

作者： Suraj Pandey Linlin Wu Siddeswara Mayura Guru Rajkumar Buyya Cloud Computing and Distributed Systems Laboratory Department of Computer Science and Software Engineering University of Melbourne Australia CSIRO Tasmanian ICT Centre Hobart Australia

ISBN: (纸本)9781424466955;9780769540184

cloud computing environments facilitate applications by providing virtualized resources that can be provisioned dynamically. However, users are charged on a pay-per-use basis. User applications may incur large data retrieval and execution costs when they are scheduled taking into account only the `execution time'. In addition to optimizing execution time, the cost arising from data transfers between resources as well as execution costs must also be taken into account. In this paper, we present a particle swarm optimization (PSO) based heuristic to schedule applications to cloud resources that takes into account both computation cost and data transmission cost. We experiment with a workflow application by varying its computation and communication costs. We compare the cost savings when using PSO and existing `Best Resource Selection' (BRS) algorithm. Our results show that PSO can achieve: (a) as much as 3 times cost savings as compared to BRS, and (b) good distribution of workload onto resources.

关键词： Particle swarm optimization Processor scheduling cloud computing Application software Cost function Computational efficiency Dynamic scheduling Computer science Software engineering Application virtualization

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cloudAnalyst: A cloudSim-based Visual Modeller for Analysing cloud computing Environments and Applications

CloudAnalyst: A CloudSim-based Visual Modeller for Analysing...

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International Conference on Advanced information Networking and Applications

作者： Bhathiya Wickremasinghe Rodrigo N. Calheiros Rajkumar Buyya The Cloud Computing and Distributed Systems (CLOUDS) Laboratory Department of Computer Science and Software Engineering The University of Melbourne Pontifical Catholic University of Rio Grande do Sul

ISBN: (纸本)9781424466955;9780769540184

Advances in cloud computing opens up many new possibilities for Internet applications developers. Previously, a main concern of Internet applications developers was deployment and hosting of applications, because it required acquisition of a server with a fixed capacity able to handle the expected application peak demand and the installation and maintenance of the whole software infrastructure of the platform supporting the application. Furthermore, server was underutilized because peak traffic happens only at specific times. With the advent of the cloud, deployment and hosting became cheaper and easier with the use of pay-peruse flexible elastic infrastructure services offered by cloud providers. Because several cloud providers are available, each one offering different pricing models and located in different geographic regions, a new concern of application developers is selecting providers and data center locations for applications. However, there is a lack of tools that enable developers to evaluate requirements of large-scale cloud applications in terms of geographic distribution of both computing servers and user workloads. To fill this gap in tools for evaluation and modeling of cloud environments and applications, we propose cloudAnalyst. It was developed to simulate large-scale cloud applications with the purpose of studying the behavior of such applications under various deployment configurations. cloudAnalyst helps developers with insights in how to distribute applications among cloud infrastructures and value added services such as optimization of applications performance and providers incoming with the use of Service Brokers.

关键词： cloud computing Modeling Simulation

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