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A P2P approach for membership management and resource discovery in grids

A P2P approach for membership management and resource discov...

引用

international conference on information technology: coding and computing (itcc)

作者： C. Mastroianni D. Talia O. Verta ICAR-CNR Rende Italy DEIS University of Calabria Rende Italy

As deployed grids increase from tens to thousands of nodes, peer-to-peer (P2P) techniques and protocols can be used to implement scalable services and application in grids. This paper proposes a P2P approach for handling two key services in grid environments: membership management and resource discovery. The membership management service exploits the use of "contact nodes", i.e. of nodes elected within virtual organizations to facilitate the assignment of neighbours and the construction of interconnections between grid nodes. The resource discovery service uses these interconnections to give grid nodes the opportunity to explore the grid and discover available resources. The paper analyzes the performance of the resource discovery service on grid networks with different sizes.

关键词： Resource management Peer to peer computing Protocols Performance analysis Web services Project management Environmental management Service oriented architecture Convergence Management information systems

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Fuzzy image segmentation combining ring and elliptic shaped clustering algorithms

Fuzzy image segmentation combining ring and elliptic shaped ...

引用

international conference on information technology: coding and computing (itcc)

作者： M.A. Ali L.S. Dooley G.C. Karmakar Gippsland School of Computing & Information Technology Monash University Australia

Results from any existing clustering algorithm that are used for segmentation are highly sensitive to features that limit their generalization. Shape is one important attribute of an object. The detection and separation of an object using fuzzy ring-shaped clustering (FKR) and elliptic ring-shaped clustering (FKE) already exists in the literature. Not all real objects however, are ring or elliptical in shape, so to address these issues, this paper introduces a new shape-based algorithm, called fuzzy image segmentation combining ring and elliptic shaped clustering algorithms (FCRE) by merging the initial segmented results produced by FKR and FKE. The distribution of unclassified pixels is performed by connectedness and fuzzy c-means (FCM) using a combination of pixel intensity and normalized pixel location. Both qualitative and quantitative analysis of the results for different varieties of images proves the superiority of the proposed FCRE algorithm compared with both FKR and FKE.

关键词： Image segmentation Clustering algorithms Shape Object detection Pixel information technology Image analysis Image coding Merging Algorithm design and analysis

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A rate control algorithm for wireless video transmission using perceptual tuning

A rate control algorithm for wireless video transmission usi...

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international conference on information technology: coding and computing (itcc)

作者： Yu Sun Dongdong Li I. Ahmad Jiancong Luo Department of Computer Science University of Central Arkansas USA Department of Electrical Engineering University of Technology Arlington USA

In video transmission over two-way wireless channel automatic repeat request (ARQ) retransmission has been used to protect packets from losing, which also causes the channel throughput varying and brings more challenges to rate control of the video compression. This paper proposes a new rate control algorithm based on regions of interest (ROI), PID buffer controlling and perceptual tuning techniques, etc. It intelligently allocates bit budget among different regions and adapts to time-varying wireless channel so as to achieve better perceptual quality in ROI and depress the frame skipping. Simulation results illustrate that our algorithm effectively enhances the perceptual quality for ROI, significantly reduces the number of frame skipping, and thereby improves the smoothness of the video.

关键词： Video compression Automatic control Communication system control Automatic repeat request Bit rate Video coding Quadratic programming Protection Throughput Three-term control

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Real stock trading using soft computing models

Real stock trading using soft computing models

引用

international conference on information technology: coding and computing (itcc)

作者： B. Doeksen A. Abraham J. Thomas M. Paprzycki Computer Science Department Oklahoma State University OK USA School of Computer Science and Engineering Chung Ang University South Korea

The main focus of this study is to compare different performances of soft computing paradigms for predicting the direction of individuals stocks. Three different artificial intelligence techniques were used to predict the direction of both Microsoft and Intel stock prices over a period of thirteen years. We explore the performance of artificial neural networks trained using backpropagation and conjugate gradient algorithm and a Mamdani and Takagi Sugeno fuzzy inference system learned using neural learning and genetic algorithm. Once all the different models were built the last part of the experiment was to determine how much profit can be made using these methods versus a simple buy and hold technique.

关键词： Fuzzy neural networks Genetic algorithms Fuzzy systems Artificial intelligence Artificial neural networks Inference algorithms Backpropagation algorithms Economic indicators Computer science Learning

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Application of loop reduction to learning program behaviors for anomaly detection

Application of loop reduction to learning program behaviors ...

引用

international conference on information technology: coding and computing (itcc)

作者： Jidong Long D.G. Schwartz S. Stoecklin M.K. Patel Department of Computer Science Florida State University Tallahassee FL USA Rivermine Software Fairfax VA USA

Evidence of some attacks can be manifested by abnormal sequences of system calls of programs. Most approaches that have been developed so far mainly concentrate on some program-specific behaviors and ignore some plain behaviors of programs. According to the concept of locality of reference, programs tend to spend most of their time on a few lines of code rather than other parts of the program. We use this finding to propose a method of loop reduction. A loop reduction algorithm, when applied to a series of system calls, eliminates redundant data. We did experiments for the comparison before and after loop reduction with the same detection approach. The preliminary results show that loop reduction improves the quality of training data by removing redundancy.

关键词： Databases Training data Intrusion detection Application software Computer science Drives Computer security Telecommunication traffic Watches information technology

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Autonomous and dynamic Web service composition in wireless grids

Autonomous and dynamic Web service composition in wireless g...

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international conference on information technology: coding and computing (itcc)

作者： Haoming Guo M. Yang X. Wu Y. Jiang Shilong Ma Guoshun Hao National Laboratory of Software Development Environment Beijing Aeronautics and Astronautics University Beijing China Department of Electrical & Computer Engineering University of Nevada Las Vegas Las Vegas NV USA

In combination of Web service and wireless technology, grid computing is evolved into a de facto standard for shared-resource computations. Although numerous efforts have been made on the construction of grid systems, stateless Web service composition has not been addressed sufficiently in grid environment, which is usually service-conscious. This paper attempts to address this issue through a novel workflow model which not only builds tasks through Web services, also handles state control through the grid platform. Based on this model, a grid system can ultimately compose Web services and give user a better tool for supercomputing.

关键词： Web services Grid computing Wireless sensor networks Stability Monitoring Engines Aerodynamics Programming Government Mobile handsets

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Development and evaluation of a slicing-based C++ debugger

Development and evaluation of a slicing-based C++ debugger

引用

international conference on information technology: coding and computing (itcc)

作者： W. Wichaipanitch M.H. Samadzadeh S. Tangsripairoj Rajamangala University of Technology Klong Luang Pathum Thani Thailand Computer Science Department Oklahoma State University Stillwater OK USA Department of Computer Science Mahidol University Bangkok Thailand

The main objective of this work was to develop a debugging tool for C++ programs called C++Debug that uses program slicing and dicing techniques. The incremental development started by including simple statements first and then adding pointers, structures, functions, and classes. In order for C++Debug to be more powerful, dynamic slicing rather than static slicing was chosen. The work included new algorithms that handle class, function, and pointer in C++. In this paper, the overall architecture of C++Debug is presented and an overview of the algorithms devised for the debugger is discussed. The limitations of the tool are also listed and the results of a small-scale evaluation of the debugger is reported.

关键词： Debugging Computer science Heuristic algorithms Runtime Computer architecture Flow graphs information technology Databases Optical computing

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XML schema re-engineering using a conceptual schema approach

XML schema re-engineering using a conceptual schema approach

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international conference on information technology: coding and computing (itcc)

作者： O.Y. Yuliana S. Chittayasothorn Assumption University Thailand and Petro Christian University Indonesia Faculty of Engineering King Mongkut's Institute of Technology Bangkok Thailand

At present, the Extensible Markup Language (XML) is popular for both data presentation and data transfer activities. XML Documents follow XML Schemas. It is possible to use them as database schemas and databases. An XML Schema can be hierarchical or flat. The hierarchical one is normally used for data presentation and the flat one is for data transfer. This research project emphasizes on the data transfer application of XML. The objective of the project is to develop a technique to reengineer poorly designed XML Schemas into the normalized ones. A software tool is developed. The tool accepts well-formatted XML Schemas and well-formatted and validated XML documents as data sources. They are reengineered into the optimal normal form schemas which guarantee not to have redundancies. The Nijssen's information Analysis Methodology (NIAM) is used as the conceptual schema model of XML databases.

关键词： XML Software tools Application software Internet Relational databases Data engineering information analysis Protocols Costs Design methodology

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Design of middleware platform to enhance abilities of application systems integration

Design of middleware platform to enhance abilities of applic...

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international conference on information technology: coding and computing (itcc)

作者： V. Chang Department of Information Management Chinese Cultural University Sijhih Taiwan

This research describes a Linux/Unix base middleware platform and GUI operating interface that has been created to help developer overcome the difficulties associated with existing software editing, upgrading, updating and integration. With growing in size and complexity of systems using in current organizations, the developing and maintaining existing or new systems can be really cost-and-time consuming. Even, the present new system might be a burden for the future new system development. We present methods for creating a route for data transmission between multiple platforms. Also, we use less than three API to connect with different application software and communication protocol. For example, TCP/IP communicates with X.25, TCP/IP communicates with SNA. The solution is benefit to an application designer to reduce the effort and time when editing or developing system. The major objective of this research is making breakthrough of providing technique for integrating different system while they consist of different OS, application software, protocol and programming language.

关键词： Middleware Application software technology management Protocols Pervasive computing Switches Condition monitoring Operating systems Costs Cities and towns

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Conversion and proxy functions for symmetric key ciphers

Conversion and proxy functions for symmetric key ciphers

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international conference on information technology: coding and computing (itcc)

作者： D.L. Cool A.D. Keromytis Dept. of Comput. Sci. Columbia Univ. New York NY USA Department of Computer Science Columbia University USA

As a general design criterion, a symmetric key cipher should not be closed under functional composition due to the implications on the security of the cipher. However, there are scenarios in which this property is desirable and can be obtained without reducing the security of a cipher by increasing the computational workload of the cipher. We expand the idea of a symmetric key cipher being closed under functional composition to a more general scenario where there exists a function that converts the ciphertext resulting from encryption under a specific key to the ciphertext corresponding to encryption with another key. We show how to perform such a conversion without exposing the plaintext. We discuss the tradeoff between the computational workload and security, and the relationship between such conversions and proxy cryptography. We conclude with a description of some practical applications of our results.

关键词： Virtual private networks Public key Computer science Computer security Inspection information security Public key cryptography

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