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Notice of Violation of IEEE Publication Principles: Multi-paradigm and Multi-grain parallel Execution Model Based on SMP-Cluster

Notice of Violation of IEEE Publication Principles: Multi-pa...

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IEEE John Vincent Atanasoff international symposium on Modern Computing, JVA

作者： Jue Wang Changjun Hu Jianxin Lai Yudi Zhao Suqin Zhang Computer Science and Technology Department Tsinghua University Beijing China Inf. Eng. Sch. Univ. of Sci. & Technol. Beijing Information Engineering School University of Science and Technology Beijing China Information Engineering School University of Science and Technology Beijing Information Engineering School University of Science and Technology Beijing China

Notice of Violation of IEEE Publication Principles "Multi-paradigm and Multi-grain parallel Execution Model Based on SMP-Cluster," by Jue Wang, Changjun Hu, Jianxin Lai, Yudi Zhao, and Suqin Zhang, in the proceedings of the IEEE John Vincent Atanasoff 2006 international symposium on Modern Computing, 2006 (JVA '06) pp.266-272 After careful and considered review of the content and authorship of this paper by a duly constituted expert committee, this paper has been found to be in violation of IEEE's Publication Principles. This paper contains portions of original text from the papers cited below. The original text was copied without appropriate attribution. "Comparing the OpenMP, MPI, and Hybrid Programming Paradigm on an SMP Cluster," by Gabriele Jost, Haoqiang Jin, Dieter an Mey, and Ferhat F. Hatay, in IEEE Transactions on parallel and distributed systems, 10(2), February 1999 In this paper, we propose a multi-paradigm and multi-grain parallel execution model based on SMP-Cluster, which integrates coarse grain, mid grain and fine grain parallelism. Multiple paradigms supported by our model include task parallel, data parallel, sequential execution, data pipeline and task-farming paradigm. It can be achieved by extending the OpenMP specification, and the extensions include directives for computing resource partition, data distribution and alignment, sequential execution and data pipeline, and functions for Master/Slave model in Macro-Task group. We also compare the performance of different implementations of three benchmark applications, using the same numerical algorithm but employing different programming approaches

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Concepts for execution time prediction of 3D GPU rendering

Concepts for execution time prediction of 3D GPU rendering

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international symposium on Industrial Embedded systems

作者： Stephan Schnitzer Simon Gansel Frank Dürr Kurt Rothermel Institute of Parallel and Distributed Systems University of Stuttgart Germany System Architecture and Platforms Department Daimler AG Germany

The relevance of graphical functions in vehicular applications has increased significantly during the last years. Modern cars are equipped with multiple displays used by different applications such as speedometer, navigation system, or media players. The recent trend towards hardware consolidation to reduce hardware cost, installation space, and energy consumption, causes graphical 3D applications of different safety-criticality to share a single GPU. This requires effective real-time GPU scheduling concepts to ensure safety and isolation for 3D rendering. Since current GPUs are not preemptible, a deadline-based scheduler must know the GPU execution time of GPU commands in advance. In this work, we present a novel framework to measure and predict the execution time of GPU commands using OpenGL ES 2.0. We present prediction models for the main GPU commands relevant for 3D rendering, namely, FLUSH, CLEAR, and DRAW. For the DRAW command we propose to use the 3D bounding box of the rendered model and apply the vertex shader projection to heuristically estimate the number of fragments rendered. We finally present the implementation and evaluation of our framework, which demonstrates its feasibility and shows that good prediction accuracy can be achieved. In our evaluation using realistic scenarios the absolute prediction error of the DRAW command did not exceed 260 μs.

关键词： Graphics processing units Context Rendering (computer graphics) Predictive models Three-dimensional displays Real-time systems Time measurement

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Parametrically described regular semigroup interconnection networks for large-scale multicomputers

Parametrically described regular semigroup interconnection n...

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

作者： O.G. Monakhov E.A. Monakhova Institute of Computational Mathematics and Mathematical Geophysics SD RAS Novosibirsk Russia

ISBN: (纸本)0769509363

We propose a new topology for multicomputer networks: parametrically described, regular, and based on semigroups (PRS) networks (or R/sub s/(N, v, g) graphs with the order N, the degree v, the girth g, and the number of equivalence classes s). Many classes of networks such as hypercubes, circulants, cube-connected cycles, etc. are shown to be special cases of the proposed network. We explore the basic structure, topological properties, optimization of parameters and synthesis of optimal networks having the minimal diameter for the given parameters of the graph. Correspondingly, we examine the optimal characteristics with respect to transit delays and structural survival in such networks. The PRS networks reaching the lower bounds on the diameter were synthesized. In some cases, we found that the new network has a better diameter than classes of networks described in the literature provided they have the same vertex and edge complexity.

关键词： Multiprocessor interconnection networks Large-scale systems Computer networks Network topology Hypercubes distributed computing Geophysics computing Network synthesis Computer architecture Mathematics

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Enabling cooperation among disconnected mobile users

Enabling cooperation among disconnected mobile users

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international Conference on Cooperative Information systems

作者： J. Klingemann T. Tesch J. Wasch Integrated Publication and Information Systems Institute GMD-IPSI GMD-German National Research Center of Information Technology Darmstadt Germany

Mobile computing and workgroup computing are emerging technologies which have so far been treated independently. Current approaches to support cooperative work neglect the special characteristics of mobile environments like limited bandwidth or temporary disconnection. On the other hand, approaches to support disconnected operation in mobile environments rely on the assumption that the degree of data sharing is low, which is obviously not appropriate for cooperative work. In this paper, we utilize the COACT (COoperative ACTivity) transaction model to provide support for parallel, disconnected activities. The model incorporates the notion of resolvable, simultaneous work. We show how the COACT 'merge' algorithm reduces conflicts by exploiting operational semantics and offering consistent sequences of operations. We believe that our new approach is a viable solution to the growing demand for cooperation in mobile environments.

关键词： Application software Mobile computing Collaborative work Computer networks Bandwidth Wireless networks databases distributed computing Information systems Information technology

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distributed Processing for Cinematic Holographic Particle Image Velocimetry 99

Distributed Processing for Cinematic Holographic Particle Im...

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proceedings of the 8th IEEE international symposium on High Performance distributed Computing

作者： Y. Pu D. Andresen

ISBN: (纸本)9780769502878

Recently the GEMINI Holographic Particle Image Velocimetry (HPIV) system developed in the Laser Flow Diagnostics (LFD) lab at Kansas State University has been successfully applied in volumetric 3-D flow velocity measurement. Due to the 3-D nature of this application, very large computation and communication requirements are imposed. An innovative algorithm, the Concise Cross Correlation (CCC), is employed in the system to extract velocity field form the hologram of the test flows. With CCC we achieved a compression ratio of 104 and a processing speed 1000 times faster than with traditional 3-D FFT-based correlation. To further accelerate the processing speed for fully time- and space- resolved measurement, parallel processing is necessary. We present our design for a distributed system supporting this previously unparallelized application, and comment on our experiences implementing a master-slave distributed version of CCC utilizing MPI. Brief experimental results on Gigabit Ethernet and multi- processor Pentium Xeon systems are given.

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The Cactus Computational Toolkit and Using distributed Computing to Collide Neutron Stars 99

The Cactus Computational Toolkit and Using Distributed Compu...

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proceedings of the 8th IEEE international symposium on High Performance distributed Computing

作者： Gabrielle Allen Tom Goodale Joan Massó Edward Seidel Max-Planck-Institut-für-Gravitationsphysik

ISBN: (纸本)9780769502878

We are developing a system for collaborative research and development for a distributed group of researchers at different institutions around the world. In a new paradigm for collaborative computational science, the computer code and supporting infrastructure itself becomes the collaborating instrument, just as an accelerator becomes the collaborating tool for large numbers of distributed researchers in particle physics. The design of this "Collaboratory" allows many users, with very different areas of expertise, to work coherently together, on distributed computers around the world. Different supercomputers may be used separately, or for problems exceeding the capacity of any single system, multiple supercomputers may be networked together through high speed gigabit networks. Central to this Collaboratory is a new type of community simulation code, called "Cactus". The scientific driving force behind this project is the simulation of Einstein's equations for studying black holes, gravitational waves, and neutron stars, which has brought together researchers in very different fields from many groups around the world to make advances in the study of relativity and astrophysics. But the system is also being developed to provide scientists and engineers, without expert knowledge of parallel or distributed computing, mesh refinement, and so on, with a simple framework for solving any system of partial differential equations on many parallel computer systems, from traditional supercomputers to networks of workstations.

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Scrambled storage for parallel memory systems 88

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proceedings of the 15th Annual international symposium on Computer architecture

作者： D. Lee York Univ. North York Ont. Canada

ISBN: (纸本)9780818608612

A scrambled storage scheme is proposed for storing arrays of NXN elements in N = 2n parallel memory modules to allow conflict-free access to various array partitions. It is shown that the scheme allows conflict-free access to rows, columns, square blocks, and distributed blocks of stored arrays. An alternative way of achieving the desired accessibility would use Budnik and Kuck's nonuniform skewed storage [3]; in this case, addressing hardware would require Ο(nX2n) exclusive-or circuits. The proposed scheme has, however, the advantage of simplifying address generation; addressing hardware requires n exclusive-or circuits only. Some of the important questions of scrambling/unscrambling data through a proposed interconnection network are discussed.

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OntoRama: Browsing RDF ontologies using a hyperbolic-style browser

OntoRama: Browsing RDF ontologies using a hyperbolic-style b...

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international Conference on Cyberworlds

作者： P. Eklund N. Roberts S. Green School of Information Technology and Electrical Engineering University of Queensland Saint Lucia QLD Australia Distributed Systems Technology Centre Private Limited University of Queensland Saint Lucia QLD Australia

This paper presents a Java-based hyperbolic-style browser designed to render RDF files as structured ontological maps. The program was motivated by the need to browse the content of a web-accessible ontology server: WEB KB-2. The ontology server contains descriptions of over 74,500 object types derived from the WordNet 1.7 lexical database and can be accessed using RDF syntax. Such a structure creates complications for hyperbolic-style displays. In WEB KB-2 there are 140 stable ontology link types and a hyperbolic display needs to filter and iconify the view so different link relations can be distinguished in multi-link views. Our browsing tool, OntoRama, is therefore motivated by two possibly interfering aims: the first to display up to 10 times the number of nodes in a hyperbolic-style view than using a conventional graphics display; secondly, to render the ontology with multiple links comprehensible in that view.

关键词： Resource description framework Ontologies Displays Java Tree graphs Australia Visualization Navigation Information technology databases

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distributed PHY-layer mesh networks

Distributed PHY-layer mesh networks

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IEEE international symposium on Personal, Indoor and Mobile Radio Communications (PIMRC)

作者： M. Dohler H. Aghvami Centre for Telecommunications Research King''s College UK

Mesh connectivity is traditionally dealt with at IP-layer, where packets are relayed to adjacent network nodes according to prior specified rules. Recently, the concept of data relaying at PHY-layer has gained widespread interest, where regenerative and transparent relaying are feasible M. O. Hasna, M-S. Alouini (2002). In parallel, investigations into MIMO systems have become mature. The current paper introduces a generalised concept of data relaying at PHY layer, where relaying is combined with MIMO technology. The thus created distributed PHY-layer mesh network is a natural generalisation of previously introduced virtual antenna arrays.

关键词： Mesh networks Relays Physical layer Routing Antenna arrays Network topology MIMO Ad hoc networks Educational institutions Paper technology

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Implementation of distributed photovoltaic power supply systems

Implementation of distributed photovoltaic power supply syst...

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IEEE international symposium on Industrial Electronics (ISIE)

作者： Chih-Chiang Hua Chao-Ren Hsiao Department of Electrical Engineering National Yunlin University of Science and Technology Yunlin Taiwan

ISBN: (纸本)0780366069

Photovoltaic power systems are based on photovoltaic or solar modules which are very reliable and do not require any fuel or servicing. The object of this paper is to investigate power converter topologies and control techniques for a photovoltaic power supply system with parallel operation. All the modules have the same control configuration and each module includes inner current loop and outer voltage loop control in the proposed system. The system controller is based on a DSP and achieves the double loop control by using deadbeat control theory. Only two proportional controllers are required to implement the proposed control for the system with excellent output characteristics. The control is simple and effective with the easy program development. Instantaneous current sharing control is used to achieve the equal current distribution by a current sharing bus and ensure a fast dynamic response, equal load sharing capability and eliminates the circulation current. Simulation and experimental results verify the system performance.

关键词： Photovoltaic systems Solar power generation Power supplies Control systems Power system reliability Voltage control Proportional control Fuels Topology Digital signal processing

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