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检索条件"任意字段=International Conference on Parallel and Distributed Processing Techniques and Applications"

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The low-cost secure sessions of access control model for distributed applications by public personal smart cards

The low-cost secure sessions of access control model for dis...

引用

2011 17th IEEE international conference on parallel and distributed Systems, ICPADS 2011

作者： Chen, Kuo-Yi Lin, Chin-Yang Hou, Ting-Wei Academia Sinica Institute of Information Science Taipei Taiwan Department of Engineering Science National Cheng Kung University Tainan Taiwan

ISBN: (纸本)9780769545769

the secure requirement of modern information systems is increasing significantly nowadays, especially in cloud computing with distributed applications. Among secure mechanisms of an organization, the access control (AC) is a foundation for modern information systems. In order to reach an effective and flexible approach of access control, the Rolebased Access Control (RBAC) models are widely deployed in organizations. Comparing with traditional discretionary access control (DAC) and mandatory access control (MAC), the userrole- subject mapping of a RBAC model provides effective permissions assignments for access control of an organization. However, the RBAC sessions could be stretched over multiple distributed servers in cloud computing. The traversed sessions between servers could be modified, monitored and attacked by modern hacker techniques, and become secure leaks in RBAC models. In order to ensure secure sessions in cloud computing, various encryption approaches are used. Among these encryption approaches, the use of digital certificates by asymmetric encryption methods could be an appropriate solution to ensure the security of RBAC sessions. However, the cost of public/private keys management and issuing an appropriate certificate tokens for each member in organizations could be very expensive. The high cost might block the deployment of secure RBAC sessions, and then reduce the secure level of organizations. In order to improve this issue, a low-cost approach of secure sessions for RBAC models is proposed in this paper. The personal smart cards can be used as a certificate tokens in RBAC models to reach effective user authentications. Moreover, each session of RBAC models, including user-role-subject assignments and contentbased accesses, can be protected by digital certificates which is generated by user own smart cards. Thus the security of RBAC sessions can be improved significantly. It is worth noting that personal smart cards are issued by public departm

关键词： Authentication

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parallel reservoir simulation on shared and distributed memory system

Parallel reservoir simulation on shared and distributed memo...

引用

international Oil and Gas conference and Exhibition in China 2000, IOGCEC 2000

作者： Liu, Wei Cao, Jianwen Mezzatesta, Alberto Zhu, Peng Baker Atlas GEOScience Baker Hughes Inc. United States RDCPS Academia Sinica Taiwan

ISBN: (纸本)9781555639075

Computational efficiency is a major subject in large-scale reservoir simulations. parallel simulation has gained popularity in recent years. Complex geological environments and production management demand new mathematics and science in various computational environments. This paper presented a parallel simulation algorithm and data processing developed for shared and distributed memory systems. The preconditioned Krylov subspace method with hybrid preconditioner based on domain decomposition was constructed to solve the large-scale linear system resulted from black-oil simulator techniques. Based on a fully implicit, three-dimensional, three-phase black-oil reservoir simulator, this project focused on the numerical intensive linear solver. The parallel algorithm is scalable and applicable to both shared and distributed memory systems. Numerical tests were performed on both multi-CPU workstations and PC clusters. A message passing interface (MPI) library was adopted for all message passing functionality in both shared and distributed memory environments. Input/output parallelism and localism are presented in these hardware setups. Numerical results from benchmark models and field application examples are presented for both the multi-CPU SGI Power Challenger and a Linux based Intel PC cluster. Results show that the speedup factor is significant. The simulation performance increases with the number of processors and only decreases due to the limitations introduced by message passing activities. © 2000, Society of Petroleum Engineers Inc.

关键词： Message passing

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Optimisation of performance & security of web applications through Machine learning models for SWP

Optimisation of performance & security of web applications t...

引用

3rd international conference on Internet Technologies and applications, ITA 09

作者： Ahmed, Shafi Tang, Shanyu

ISBN: (纸本)9780946881659

Web applications accessed via web browsers over a network such as the Internet or an intranet. This research aims to investigate ways of improving the performance and security of web applications by means of Machine learning methods. Research will be carried out on the basis of a specific Smart Web Platform (SWP). This is being developed on top of the .NET framework and MySQL supported by a KTP grant. Several techniques, including Advanced SQL injection, MapReduce and distributed processing on clusters, will be used to develop a comprehensive framework based on machine learning methods for web applications. Finally a realistic model capable of rating a website's performance and security will be developed and validated through simulations.

关键词： MapReduce

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Tools and techniques for model cheeking networked programs

Tools and techniques for model cheeking networked programs

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9th ACIS international conference on Software Engineering, Artificial Intelligence, Networking and parallel/distributed Computing, SNPD 2008 in conjunction with 2nd international Workshop on Advanced Internet Technology and applications, AITA 2008

作者： Artho, Cyrille Leungwattanakit, Watcharin Hagiya, Masami Tanabe, Yoshinori RCIS AIST Tokyo Japan University of Tokyo Tokyo Japan CVS AIST Tokyo Japan

ISBN: (纸本)9780769532639

For software executing several threads in parallel, testing is unreliable, as it cannot cover all thread schedules. Model checking, however, can cover all possible thread interleavings. Software model checkers can directly verify an implementation, but typically cannot handle network input/output operations, which most programs require. This shortcoming can be addressed by a special model checker designed for multiple processes, or by different kinds of extensions and preprocessors for existing model checkers. This paper surveys currently existing approaches and tools. © 2008 IEEE.

关键词： Model checking

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Omnipresent collaborative virtual environments for open inventor applications

引用

1st international conference on Intelligent Technologies for Interactive Entertainment

作者： Peciva, J Brno Univ Technol Fac Informat Technol Brno 61266 Czech Republic

ISBN: (纸本)3540305092

This paper presents a library for collaborative virtual environments that will enable developers to extend their standalone 3D applications into the collaborative virtual environment applications without many efforts. The collaborative virtual environment applications usually put many extraordinary consistency problems on developers. Many of these problems are related to distributed systems and parallel processing. Most of them are already taken care in the library presented in this paper. To show usability and make programming with the library even easier, it was integrated as the extension into the Open Inventor. As a result, all Open Inventor applications can now benefit from collaboration with other applications. Many of them require just few lines of changes to their sources to get robust collaboration;compared to hundreds lines of code of hand-made solution that will give just simple collaboration without any consistency guaranties.

关键词： Intelligent agents

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High-productivity Framework on GPU-rich Supercomputers for Operational Weather Prediction Code ASUCA 14

High-productivity Framework on GPU-rich Supercomputers for O...

引用

international conference on High Performance Computing, Networking, Storage and Analysis

作者： Shimokawabe, Takashi Aoki, Takayuki Onodera, Naoyuki Tokyo Inst Technol Meguro Ku 2-12-1 Ookayama Tokyo Japan

ISBN: (纸本)9781479955008

The weather prediction code demands large computational performance to achieve fast and high-resolution simulations. Skillful programming techniques are required for obtaining good parallel efficiency on GPU supercomputers. Our framework-based weather prediction code ASUCA has achieved good scalability with hiding complicated implementation and optimizations required for distributed GPUs, contributing to increasing the maintainability;ASUCA is a next-generation highresolution meso-scale atmospheric model being developed by the Japan Meteorological Agency. Our framework automatically translates user-written stencil functions that update grid points and generates both GPU and CPU codes. User-written codes are parallelized by MPI with intra-node GPU peer-to-peer direct access. These codes can easily utilize optimizations such as overlapping technique to hide communication overhead by computation. Our simulations on the GPU-rich supercomputer TSUBAME 2.5 at the Tokyo Institute of Technology have demonstrated good strong and weak scalability achieving 209.6 TFlops in single precision for our largest model using 4,108 NVIDIA K20X GPUs.

关键词： application program interfaces geophysics computing graphics processing units mainframes message passing parallel machines peer-to-peer computing CPU codes GPU codes GPU-rich supercomputer TSUBAME 2.5 Japan Meteorological Agency MPI NVIDIA K20X GPU Tokyo Institute of Technology high-productivity framework intranode GPU peer-to-peer direct access next-generation high resolution meso-scale atmospheric model operational weather prediction code ASUCA parallel efficiency skillful programming techniques user-written codes Atmospheric modeling Computational modeling Graphics processing units Mathematical model Numerical models Programming Weather forecasting message passing weather forecasting Graphics processing Unit Atmospheric models Mainframes Application programming interfaces geophysics computing Peer to peer computing mannose phosphate isomerase remote procedure calls parallel machines Computational modeling numerical models supercomputer Programming

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Medical image processing using transputer based hardware

Medical image processing using transputer based hardware

引用

Third international conference on Image processing and its applications

作者： Ross, P.G.B. Lomax, A.J. Byrne, J.P. Undrill, P.E. Univ of Aberdeen United Kingdom

The University of Aberdeen has its general computational resources for clinical image research provided by a small network based around a DEC Micro-Vax 2 and a DEC VAX 11/750, supported by a dual station SIGMEX ARGS 7000 image display system. They are not sufficiently powerful to extend the applications to modern image processing techniques. We have developed a transputer based ancillary processor which uses a VAX as a file and terminal server. The application of parallel computing methods, particularly those using transputers, is attractive to the medical image processing scientist since it offers cost effective solutions to long standing problems. We have shown, in three computationally intense areas, how improvements may be achieved. The improvements are very dependent on algorithmic choices and implementation topologies.

关键词： Image processing

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Queueing models of parallel applications: The Glamis methodology 7th

Queueing models of parallel applications: The Glamis methodo...

引用

7th international conference on Modelling techniques and Tools for Computer Performance Evaluation, 1994

作者： Jonkers, Henk Delft University of Technology P.O. Box 5031 Delft2600 GA Netherlands

ISBN: (纸本)9783540484165

In the development of efficient parallel applications, reliable performance predictions are essential. However, many performance modelling formalisms, such as queueing networks, are not directly suitable for modelling parallel applications, while for other formalisms the analysis is too expensive. We present a methodology for performance modelling of parallel processing systems (Glamis), based on extended queueing networks, aiming to overcome these problems. The methodology yields reliable performance predictions for a class of parallel machines and programs at relatively low (polynomial time) analysis cost. Additional reductions of analysis cost are obtained by exploiting inherent replications in parallel systems. © Springer-Verlag Berlin Heidelberg 1994.

关键词： Queueing theory

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Efficient parallel processing of Stereoscopic Video Streams for Low-Latency applications 15

Efficient Parallel Processing of Stereoscopic Video Streams ...

引用

15th international conference on Computing Communication and Networking Technologies, ICCCNT 2024

作者： Manjunath, H.R. Gaikwad, V.S. Kuppuraj, T. Singh, Takveer Jana, D Little Femilin Kansal, Amit School of Engineering and Technology Physics Karnataka Bangalore India Vishwakarma Institute of Technology Computer Engineering Pune India Karpagam Academy of Higher Education Department of Computer Applications Coimbatore India Chitkara University Centre of Research Impact and Outcome Punjab Rajpura140417 India Prince Shri Venkateshwara Padmavathy Engineering College Department of Science and Humanities Chennai India Quantum University Research Centre Quantum University India

ISBN: (纸本)9798350370249

Streams for video conferencing and interactive streaming applications. By using exploiting the spatial and temporal redundancies of stereoscopic video sequences, the proposed technique leverages GPUs to technique and encodes the video streams in parallel, decreasing the full latency from video shooting to encoding for transmission. This technique utilizes parallel processing to lessen latency by means of processing more than one frame simultaneously, utilizing facts systems to make the most interface dependencies and calculating the audio-video synchronization in a single bypass. The technique also uses motion estimation techniques to reduce the range of layers of the video coding, and a temporal scalability scheme to lessen temporal artifacts. Moreover, the technique applies the excessive-performance encoding of the LHE codec to enhance the compression performance and latency for stereoscopic video streaming. Ultimately, the resulting latency of the proposed approach is validated to be superior to frame-with the aid of-frame encoding for actual-time stereo video streaming. © 2024 IEEE.

关键词： Actual Compression Enhance Proposed Streaming Superior

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distributed graph summarization 14

Distributed graph summarization

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23rd ACM international conference on Information and Knowledge Management, CIKM 2014

作者： Liu, Xingjie Tian, Yuanyuan He, Qi Lee, Wang-Chien McPherson, John Square Inc. United States IBM Almaden Research Center United States LinkedIn Inc. United States Pennsylvania State University United States

ISBN: (纸本)9781450325981

Graph has been a ubiquitous and essential data representation to model real world objects and their relationships. Today, large amounts of graph data have been generated by various applications. Graph summarization techniques are crucial in uncovering useful insights about the patterns hidden in the underlying data. However, all existing works in graph summarization are single-process solutions, and as a result cannot scale to large graphs. In this paper, we introduce three distributed graph summarization algorithms to address this problem. Experimental results show that the proposed algorithms can produce good quality summaries and scale well with increasing data sizes. To the best of our knowledge, this is the first work to study distributed graph summarization methods. Copyright 2014 ACM.

关键词： graph summary distributed data processing graph processing

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