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检索条件"任意字段=International Symposium on Software Engineering for Parallel and Distributed Systems"

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Marte CCSL to Execute East-ADL Timing Requirements

Marte CCSL to Execute East-ADL Timing Requirements

引用

international symposium on Object-Oriented Real-Time distributed Computing

作者： Frédéric Mallet Marie-Agnès Peraldi-Frati Charles Andre Aoste Project I3S-INRIA Université de Nice-Sophia Antipolis Sophia-Antipolis France

In the automotive domain, several loosely-coupled architecture description languages (ADLs) compete to provide a set of abstract modeling and analysis services on top of the implementation code. In an effort to make all these languages, and more importantly their underlying models, interoperable, we use the UML profile for MARTE as a pivot to define the semantics of these *** this paper, we particularly focus on East-ADL2. We discuss the benefits of having an integrated, MARTE-centered, approach. We give a formal semantics of East-ADL2 timing requirements. Relying on this semantics, several kinds of analysis are possible. Requirements become executable and simulations are run. A constraint solver is used to detect logical inconsistencies. Our proposal is illustrated on an anti-lock braking system (ABS).

关键词： Timing Unified modeling language Automotive engineering Architecture description languages Proposals Buildings distributed computing software systems Embedded software Real time systems

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A new RFID authentication protocol with resistance to server impersonation

A new RFID authentication protocol with resistance to server...

引用

international symposium on parallel and distributed Processing (IPDPS)

作者： Mete Akgun M. Ufuk Caglayan Emin Anarim Tübitak UEKAE Kocaeli Turkey Computer Engineering Department Boğaziçi University Istanbul Turkey Electrical Engineering Department Boğaziçi University Istanbul Turkey

Security is one of the main issues to adopt RFID technology in daily use. Due to resource constraints of RFID systems, it is very restricted to design a private authentication protocol based on existing cryptographic functions. In this paper, we propose a new RFID authentication protocol. The proposed protocol provides better protection against privacy and security threats than those before. Our proposed protocol is resistant to server impersonation attack introduced in. Former proposal assumes that the adversary should miss any reader-to-tag communication flows and claims that their protocol is secure against forward traceability only in such communication environment. We show that even under such an assumption, the former proposed protocol is not secure. Our proposed protocol is secure against forward traceability, if the adversary misses any reader-to-tag communication flows. Our protocol also has low computational load on both the tag and the server side.

关键词： Radiofrequency identification Authentication Access protocols Cryptographic protocols RFID tags Privacy Communication system security Cryptography Protection Proposals

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Exploring the multiple-GPU design space

Exploring the multiple-GPU design space

引用

international symposium on parallel and distributed Processing (IPDPS)

作者： Dana Schaa David Kaeli Department of Electrical and Computer Engineering Northeastern University USA

Graphics processing units (GPUs) have been growing in popularity due to their impressive processing capabilities, and with general purpose programming languages such as NVIDIA's CUDA interface, are becoming the platform of choice in the scientific computing community. Previous studies that used GPUs focused on obtaining significant performance gains from execution on a single GPU. These studies employed low-level, architecture-specific tuning in order to achieve sizeable benefits over multicore CPU execution. In this paper, we consider the benefits of running on multiple (parallel) GPUs to provide further orders of performance speedup. Our methodology allows developers to accurately predict execution time for GPU applications while varying the number and configuration of the GPUs, and the size of the input data set. This is a natural next step in GPU computing because it allows researchers to determine the most appropriate GPU configuration for an application without having to purchase hardware, or write the code for a multiple-GPU implementation. When used to predict performance on six scientific applications, our framework produces accurate performance estimates (11% difference on average and 40% maximum difference in a single case) for a range of short and long running scientific programs.

关键词： Hardware Scientific computing Performance gain Libraries Application software Computer graphics Computer languages Multicore processing Central Processing Unit Programming profession

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ARRAY: A Non-application-Related, Secure, Wide-Area Disaster Recovery Storage System

ARRAY: A Non-application-Related, Secure, Wide-Area Disaster...

引用

international symposium on parallel and distributed Processing with Applications, ISPA

作者： Lingfang Zeng Dan Feng Bharadwaj Veeravalli Qingsong Wei Division of Data Storage System Wuhan National Laboratory for Optoelectronics Key Laboratory of Information Storage Ministry of Education School of Computer Science and Technology Huazhong University of Science and Technology Wuhan China Department of Electrical and Computer Engineering National University of Singapore Singapore Data Storage Institute Singapore

With our society more information-driven, we have begun to distribute data in wide-area storage systems. At the same time, both physical failure and logic error have made it difficult to bring the necessary recovery to bear on remote data disaster, and understanding this proceeding. We describe ARRAY, a system architecture for data disaster recovery that combines reliability, storage space, and security to improve performance for data recovery applications. The paper presents an exhaustive analysis of the design space of ARRAY systems, focusing on the trade-offs between reliability, storage space, security, and performance that ARRAY must make. We present RSRAII (Replication-based Snapshot Redundant Array of Independent Imagefiles) which is a configurable RAID-like data erasure-coding, and also others benefits come from consolidation both erasure-coding and replication strategies. A novel algorithm is proposed to improve snapshot performance referred to as SMPDP (Snapshot based on Multi-parallel Degree Pipeline).

关键词： Secure storage Network servers Bandwidth Redundancy Data security Cities and towns Laboratories Educational technology Hardware History

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High-Performance Cloud Computing: A View of Scientific Applications

High-Performance Cloud Computing: A View of Scientific Appli...

引用

international symposium on parallel Architectures, Algorithms and Networks (ISPAN)

作者： Christian Vecchiola Suraj Pandey Rajkumar Buyya Cloud computing and Distributed Systems (CLOUDS) Laboratory Department of Computer Science and Software Engineering University of Melbourne Australia

Scientific computing often requires the availability of a massive number of computers for performing large scale experiments. Traditionally, these needs have been addressed by using high-performance computing solutions and installed facilities such as clusters and super computers, which are difficult to setup, maintain, and operate. Cloud computing provides scientists with a completely new model of utilizing the computing infrastructure. Compute resources, storage resources, as well as applications, can be dynamically provisioned (and integrated within the existing infrastructure) on a pay per use basis. These resources can be released when they are no more needed. Such services are often offered within the context of a service level agreement (SLA), which ensure the desired quality of service (QoS). Aneka, an enterprise cloud computing solution, harnesses the power of compute resources by relying on private and public clouds and delivers to users the desired QoS. Its flexible and service based infrastructure supports multiple programming paradigms that make Aneka address a variety of different scenarios: from finance applications to computational science. As examples of scientific computing in the cloud, we present a preliminary case study on using Aneka for the classification of gene expression data and the execution of fMRI brain imaging workflow.

关键词： Cloud computing Quality of service Application software Scientific computing Availability Large-scale systems Context-aware services Finance Computer applications Gene expression

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An Improved Score Level Fusion in Multimodal Biometric systems

An Improved Score Level Fusion in Multimodal Biometric Syste...

引用

IEEE international Conference on parallel and distributed Computing, Applications and Technologies (PDCAT)

作者： Shi-Jinn Horng Yuan-Hsin Chen Ray-Shine Run Rong-Jian Chen Jui-Lin Lai Kevin Octavius Sentosal Department of Computer Science and Information Engineering National Taiwan University of Science and Technology Taipei Taiwan Department of Electronic Engineering National United University Miaoli Taiwan

In a multimodal biometric system, the effective fusion method is necessary for combining information from various single modality systems. In this paper we examined the performance of sum rule-based score level fusion and support vector machines (SVM)-based score level fusion. Three biometric characteristics were considered in this study: fingerprint, face, and finger vein. We also proposed a new robust normalization scheme (reduction of high-scores effect normalization) which is derived from min-max normalization scheme. Experiments on four different multimodal databases suggest that integrating the proposed scheme in sum rule-based fusion and SVM-based fusion leads to consistently high accuracy.

关键词： Biometrics Databases Authentication Biosensors Computer science Support vector machines Fingerprint recognition Feature extraction distributed computing Application software

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Making resonance a common case: A high-performance implementation of collective I/O on parallel file systems

Making resonance a common case: A high-performance implement...

引用

international symposium on parallel and distributed Processing (IPDPS)

作者： Xuechen Zhang Song Jiang Kei Davis ECE Department Wayne State University Detroit MI USA Computer and Computational Sciences Los Alamos National Laboratory Los Alamos NM USA

Collective I/O is a widely used technique to improve I/O performance in parallel computing. It can be implemented as a client-based or as a server-based scheme. The client-based implementation is more widely adopted in the MPIIO software such as ROMIO because of its independence from the storage system configuration and its greater portability. However, existing implementations of client-side collective I/O do not consider the actual pattern of file striping over multiple I/O nodes in the storage system. This can cause a large number of requests for non-sequential data at I/O nodes, substantially degrading I/O performance. Investigating a surprisingly high I/O throughput achieved when there is an accidental match between a particular request pattern and the data striping pattern on the I/O nodes, we reveal the resonance phenomenon as the cause. Exploiting readily available information on data striping from the metadata server in popular file systems such as PVFS2 and Lustre, we design a new collective I/O implementation technique, named as resonant I/O, that makes resonance a common case. Resonant I/O rearranges requests from multiple MPI processes according to the presumed data layout on the disks of I/O nodes so that non-sequential access of disk data can be turned into sequential access, significantly improving I/O performance without compromising the independence of a client-based implementation. We have implemented our design in ROMIO. Our experimental results on a small- and medium-scale cluster show that the scheme can increase I/O throughput for some commonly used parallel I/O benchmarks such as mpi-io-test and ior-mpi-io over the existing implementation of ROMIO by up to 157%, with no scenario demonstrating significantly decreased performance.

关键词： Resonance File systems Throughput Concurrent computing High performance computing Laboratories parallel processing Degradation Pattern matching File servers

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Dynamic adaptive redundancy for quality-of-service control in wireless sensor networks

Dynamic adaptive redundancy for quality-of-service control i...

引用

international symposium on parallel and distributed Processing (IPDPS)

作者： Ing-Ray Chen Anh Phan Speer Mohamed Eltoweissy Department of Computer Science Virginia Tech USA Department of Computer Science Virginia Tech Department of Electrical and Computer Engineering Virginia Tech USA

In this paper, we develop and evaluate a new concept of adaptive optimal redundancy to efficiently provide wireless sensor network (WSN) users with QoS-aware information services. Our approach to satisfying application QoS requirements while maximizing the system lifetime is to determine dynamically the optimal level of redundancy at the ldquosourcerdquo and ldquopathrdquo levels in response to network dynamics and query QoS requirements on a query by query basis. We develop a mathematical model to analyze the performance characteristics of our proposed solution. The obtained results show that dynamically and adaptively identifying and managing optimal redundancy for per-hop data delivery lead to satisfying query QoS requirements in terms of reliability and timeliness, while maximizing the useful lifetime of WSNs. We validate the analytical results with extensive simulation.

关键词： Programmable control Adaptive control Quality of service Wireless sensor networks Redundancy Performance analysis Large-scale systems Personal communication networks Sensor phenomena and characterization Computer science

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A Study of Group Size Effects on a Hybrid P2P System

A Study of Group Size Effects on a Hybrid P2P System

引用

international Conference on parallel and distributed systems (ICPADS)

作者： Ping-I Chou Pangfeng Liu Department of Computer Science and Information Engineering National Taiwan University Taipei Taiwan Department of Computer Science and Information Engineering Graduate Institute of Networking and Multimedia National Taiwan University Taipei Taiwan

P2P network is the one of the most important application models in Internet. Numerous structured and unstructured P2P models have been proposed in the last ten years, and both models do have distinctive advantages and disadvantages. We proposed a hybrid model to strike a balance between these two models using peer grouping. Since the size of peer groups is essential to performance, we analyze the effect of group size on the maintenance cost, which is measured in terms of the number of maintenance messages. Experimental results suggest that the group size obtained from our theoretical analysis is very close to the actual best group size obtained from simulation, and the hybrid model uses less messages in maintaining a P2P network than Chord does.

关键词： Peer to peer computing Network topology Computer science IP networks Telecommunication traffic Centralized control Control systems Load management Application software Performance analysis

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Special purpose 3-D reconstruction and restoration algorithms for electron microscopy of nanoscale objects and an enabling software toolkit

Special purpose 3-D reconstruction and restoration algorithm...

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IEEE international symposium on Biomedical Imaging

作者： Cory J. Prust Kang Wang Yili Zheng Peter C. Doerschuk Electrical and Computer Engineering Purdue University West Lafayette IN USA Biomedical Engineering and Electrical and Computer Engineering Cornell University Ithaca NY USA

ISBN: (纸本)9781424439317

Two algorithms are described for electron microscopy tasks: (1) 3-D reconstruction of an infectious bacteriophage, including the tail, based on a set of single-particle cryo electron microscopy images of identical phage particles with one image per particle and (2) restoration, resolution enhancement, and classification of spherical viruses in a cell based on a tomographic reconstruction of the entire cell. While different tasks, the statistical algorithms, which are maximum likelihood estimators, have extensive commonality. In order to provide solutions for such tasks in a timely fashion, a software toolkit has been created, based on the commonality, for writing parallel software systems to solve these problems.

关键词： Three dimensional displays software algorithms Electron microscopy software tools Image restoration Image resolution Tomography Image reconstruction

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