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2014 ACM/SIGDA International Symposium on Field Programmable Gate Arrays, FPGA 2014

作者： Wang, Yuxin Li, Peng Cong, Jason Center for Energy-Efficient Computing and Applications Peking University China Computer Science Department University of California Los Angeles United States PKU UCLA Joint Research Institute in Science and Engineering United States

ISBN: (纸本)9781450326711

The signicant development of high-level synthesis tools has greatly facilitated FPGAs as general computing platforms. During the parallelism optimization for the data path, mem-ory becomes a crucial bottleneck that impedes performance enhancement. Simultaneous data access is highly restricted by the data mapping strategy and memory port constraint. Memory partitioning can eciently map data elements in the same logical array onto multiple physical banks so that the accesses to the array are parallelized. Previous meth-ods for memory partitioning mainly focused on cyclic parti-tioning for single-port memory. In this work we propose a generalized memory-partitioning framework to provide high data throughput of on-chip memories. We generalize cyclic partitioning into block-cyclic partitioning for a larger de-sign space exploration. We build the conict detection algo-rithm on polytope emptiness testing, and use integer points counting in polytopes for intra-bank oset generation. Mem-ory partitioning for multi-port memory is supported in this framework. Experimental results demonstrate that com-pared to the state-of-art partitioning algorithm, our pro-posed algorithm can reduce the number of block RAM by 19.58%, slice by 20.26% and DSP by 50%.

关键词： High level synthesis

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A study on evolution of influence in online social networks

A study on evolution of influence in online social networks

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2013 International Conference on Advanced Computing and Communication Systems, ICACCS 2013

作者： Yeruva, Sujatha Devi, T. Samatha Reddy, Y. Department of Computer Science St.Francis College for Women Hyderabad16 India Dept. of Computer Applications Bharathiar University Coimbatore46 India Department of System Engineering NVIDIA Graphics Pvt Ltd Hyderabad46 India

ISBN: (纸本)9781479935062

Online social networks are gaining galloping upward momentum in a quick succession ever since from their inception as they lay a sturdy platform to share the information seeping into everyone who is concerned about it. In this spirited world substantial amount of success depends on how quickly one is able to reach out to the maximum number of people. There are very few who can have paramount consideration of influence on others. Crux of the problem is to pick right people whose influence is absolute in order to diffuse the influence with minimum effort. These seeding people can in turn be used to make an upward notion in areas like politics, all types of education including health and farming, introduce a product or service in the market, to revolutionize any formal setup environment of both private and public, training employees, changes in thinking patterns of the society and its life style, to propagate superior deliberations in the minds of people and likewise. In this paper Pareto front function is used to identify the eminent leaders which is followed by the empirical analysis of the results of evolution of their influence. © 2013 IEEE.

关键词： Social networking (online)

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A Study on Object-Oriented Testing Technique and Object-Oriented Metrics Useful in Reducing Class Testing Complexity

A Study on Object-Oriented Testing Technique and Object-Orie...

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International Conference on Advanced Computing & Communication Technologies (ACCT)

作者： Brij Mohan Goel Department of Computer Science and Applications Vaish College of Engineering Rohtak India

Testing the inherited features is clearly essential, however, the testing process can easily become very complex if features in the child classes are unnecessarily tested. In this paper, an object-oriented testing technique "Inheritance Testing in Classes" (ITC) is proposed that facilitates the testing of object-oriented code by incorporating procedures to support inheritance testing. ITC provides a framework that helps to ensure that appropriate components and interactions are tested by generating code segments that drive the testing process. ITC is developed and tested using the object-oriented (OO) paradigm.

关键词： Testing Measurement Complexity theory Software Estimation Maintenance engineering Encoding

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Defining an 2 -disparity Measure to Check and Improve the Geometric Accuracy of Non-interpolating Curved High-order Meshes

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Procedia engineering 2015年 124卷 122-134页

作者： Eloi Ruiz-Gironés Jose Sarrate Xevi Roca Laboratori de Ca‘lcul Nume‘ric (LaCa‘N) Departament de Matema‘tica Aplicada III (MA III) Universitat Polite‘cnica de Catalunya (UPC) Campus Nord UPC 08034 Barcelona Spain Computer Applications in Science and Engineering Barcelona Supercomputing Center 08034 Barcelona Spain. Aerospace Computational Design Laboratory Department of Aeronautics and Astronautics Massachusetts Institute of Technology Cambridge MA 02139 USA

We define an 2 -disparity measure between curved high-order meshes and parameterized manifolds in terms of an 2 norm. The main application of the proposed definition is to measure and improve the distance between a curved high-order mesh and a target parameterized curve or surface. The approach allows considering meshes with the nodes on top of the curve or surface (interpolative), or floating freely in the physical space (non-interpolative). To compute the disparity measure, the average of the squared point-wise differences is minimized in terms of the nodal coordinates of an auxiliary parametric high-order mesh. To improve the accuracy of approximating the target manifold with a non-interpolating curved high-order mesh, we minimize the square of the disparity measure expressed both in terms of the nodal coordinates of the physical and parametric curved high-order meshes. The proposed objective functions are continuously differentiable and thus, we are able to use minimization algorithms that require the first or the second derivatives of the objective function. Finally, we present several examples that show that the proposed methodology generates high-order approximations of the target manifold with optimal convergence rates for the geometric accuracy even when non-uniform parameterizations of the manifolds are prescribed. Accordingly, we can generate coarse curved high-order meshes significantly more accurate than finer low-order meshes that feature the same resolution.

关键词： High-order mesh non-interpolative mesh disparity between manifolds geometric accuracy convergence rate

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Secured temporal log management techniques for Cloud

Secured temporal log management techniques for Cloud

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IUTAM Symposium on the Dynamics of Extreme Events Influenced by Climate Change (2013)

作者： Muthurajkumar, S. Ganapathy, S. Vijayalakshmi, M. Kannan, A. Department of Information Science and Technology College of Engineering Guindy Anna University Chennai India Department of Computer Applications Maulana Azad National Institude of Technology Bhopal MP India

Log Management has been an important service in Cloud Computing. In any business, maintaining the log records securely over a particular period of time is absolutely necessary for various reasons such as auditing, forensic analysis, evidence etc. In this work, Integrity and confidentiality of the log records are maintained at every stage of Log Management namely the Log Generation phase, Transmission phase and Storage phase. In addition to this, Log records may often contain sensitive information about the organization which should not be leaked to the outside world. In this paper, Temporal Secured Cloud Log Management Algorithm techniques are implemented to provide security to maintain transaction history in cloud within time period. In this work, security to temporal log management is provided by encrypting the log data before they are stored in the cloud storage. They are also stored in batches for easy retrieval. This work was implemented in Java programming language in the Google drive environment. © 2015 The Authors. Published by Elsevier B.V.

关键词： Cloud storage

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Modified Gur Game for WSNs QoS control

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Procedia computer science 2014年 32卷 1168-1173页

作者： Eman M. Elshahed Rabie A. Ramadan Shahinaz M. Al-tabbakh H. El-zahed Computer Applications- Physics Department Faculty of women for Art Science and Education Ain Shams University Cairo Egypt Computer Engineering Department Faculty of Engineering Cairo University Egypt

Wireless Sensor Networks (WSNs) have been utilized by many critical applications such as military and health care monitoring. Such applications require special Quality of Service (QoS) treatment. However, the components of sensor nodes suffer from different limitations including the scarce energy source, limited processing capabilities, and limited storage space. At the same time, nodes are supposed to live for long time. This could occur when the energy is balanced on the active nodes in the network. This paper handles the problem of QoS in Wireless Sensor Networks (WSNs). The paper considers the limitation of the nodes in handling many messages at the same time especially the sink node. Therefore, nodes can coordinate with each other to minimize the number of dropped message. Defining some nodes to send to the sink node at certain time allows other nodes to go to sleep. Certainly, this QoS control enhances the operation of the network and positively affect the nodes’ consumed energy. This work applies one of the game theory schemes which is Gur game. The paper proposes two QoS control techniques with Quick Convergence called Periodic Gur Game (PGur) and Adaptive Periodic Gur Game (APGur). These two approaches are evaluated using different sets of experiments.

关键词： Wireless sensor networks periodic gur game adabtive periodic gur game quality of service network lifetime

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Time Account Based Path Stabilization in MANET

Time Account Based Path Stabilization in MANET

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World Congress on Computing and Communication Technologies (WCCCT)

作者： T. Manimegalai C. Jayakumar Department of Computer Applications SSN College of Engineering Chennai India Department of Computer Science and Engineering RMK Engineering College Chennai India

MANET is a collection of wireless nodes with high mobility ratio. Construction of path is mandatory by the source node to its destination in-order to communicate. As the nodes move very fast, the path which had been constructed cannot persist. A path may or may not exist even immediate to its construction. Though many mobility models and routing protocols are in existence, finding such path is still a challenge for the mobile nodes in MANET environment. Frequent path failures are not appreciated for certain application as the communication is important and emergency. In this research work an algorithm named "Time Account Based Path Stabilizer (TABPS)" is used to improve the stability of the constructed path between a pair of source and destination.

关键词： Routing protocols Delays Routing Packet loss Reliability

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An efficient and flexible host-FPGA PCIe communication library 24

An efficient and flexible host-FPGA PCIe communication libra...

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24th International Conference on Field Programmable Logic and applications, FPL 2014

作者： Gong, Jian Wang, Tao Chen, Jiahua Wu, Haoyang Ye, Fan Lu, Songwu Cong, Jason Center for Energy-Efficient Computing and Applications School of EECS Peking University Beijing China UCLA Computer Science Department Los AngelesCA United States PKU-UCLA Joint Research Institute in Science and Engineering United States

ISBN: (纸本)9783000446450

A high-performance interconnection between a host processor and FPGA accelerators is in much demand. Among various interconnection methods, a PCIe bus is an attractive choice for loosely coupled accelerators. Because there is no standard host-FPGA communication library, FPGA developers have to write significant amounts of PCIe related code at both the FPGA side and the host processor side. A high-performance host-FPGA PCIe communication library holds the key to broadening the use of FPGA accelerators. In this paper we target efficiency and flexibility as two important features in such a library. We discuss the challenges in providing these features, and present our solution to these challenges. We propose EPEE, an efficient and flexible host-FPGA PCIe communication library and describe its design. We implemented EPEE in various generations of Xilinx FPGAs with up to 26.24 Gbps half-duplex and 43.02 Gbps full-duplex aggregate throughput in the PCIe Gen2 X8 mode;these are at the best utilization levels that a host-FPGA PCIe library can achieve. The EPEE library has been integrated into four different FPGA applications with different data usage patterns in various institutes. © 2014 Technical University of Munich (TUM).

关键词： Field programmable gate arrays (FPGA)

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Leveraging social connections to improve personalized ranking for collaborative filtering 14

Leveraging social connections to improve personalized rankin...

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23rd ACM International Conference on Information and Knowledge Management, CIKM 2014

作者： Zhao, Tong McAuley, Julian King, Irwin Shenzhen Key Laboratory of Rich Media Big Data Analytics and Applications Shenzhen Research Institute Chinese University of Hong Kong Shenzhen China Department of Computer Science and Engineering Chinese University of Hong Kong Shatin N.T. Hong Kong Department of Computer Science and Engineering UC San Diego San DiegoCA United States

ISBN: (纸本)9781450325981

Recommending products to users means estimating their preferences for certain items over others. This can be cast either as a problem of estimating the rating that each user will give to each item, or as a problem of estimating users' relative preferences in the form of a ranking. Although collaborative-filtering approaches can be used to identify users who rate and rank products similarly, another source of data that informs us about users' preferences is their set of social connections. Both rating- and ranking-based paradigms are important in real-world recommendation settings, though rankings are especially important in settings where explicit feedback in the form of a numerical rating may not be available. Although many existing works have studied how social connections can be used to build better models for rating prediction, few have used social connections as a means to derive more accurate ranking-based models. Using social connections to better estimate users' rankings of products is the task we consider in this paper. We develop a model, SBPR (Social Bayesian Personalized Ranking), based on the simple observation that users tend to assign higher ranks to items that their friends prefer. We perform experiments on four real-world recommendation data sets, and show that SBPR outperforms alternatives in ranking prediction both in warm- and cold-start settings. Copyright 2014 ACM.

关键词： Collaborative filtering

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Impact of wireless link delay on handover latency in Mobile IPv6 environment

Impact of wireless link delay on handover latency in Mobile ...

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International Conference on Issues and Challenges in Intelligent Computing Techniques (ICICT)

作者： Aran Kumar Tripathi R. Radhakrishanan J.S. Lather Department of Computer Applications Krishna Institute of Engg. and Tech. Ghaziabad Department of Computer Science ABES Engineering College Ghaziabad Department of Computer Applications National Institute of Technology Kurukshetra

In the last decade tremendous development in the area of mobile and wireless network. Internet engineering Task Force (IETF) proposed Mobile IPv6 to provide mobility in wireless IPv6 networks. But still transparent mobility over the Internet is one of the biggest in challenges. Recently Hierarchical Mobile IPv6 (HMIPv6) and Proxy Mobile IPv6 (PMIPv6) are proposed to reduce the handover latency and as a result to reduce packet loss. This paper analyzes impact of handover latency wireless link delay on handover latency and compares the results analytically.

关键词： Manganese Handover Barium Packet loss Protocols

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