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The GRelC library: a basic pillar in the grid relational catalog architecture

The GRelC library: a basic pillar in the grid relational cat...

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

作者： G. Aloisio M. Cafaro S. Fiore M. Mirto Center for Advanced Computational Technologies/ISUFI University of Lecce Italy

Today many data grid applications need to manage and process a very large amount of data distributed across multiple grid nodes and stored in relational databases. The Grid Relational Catalog Project (GRelC) developed at the CACT/ISUFI of the University of Lecce, represents an attempt to design and deploy a grid-DBMS for the Globus Community. In this paper, after defining the grid-DBMS concept, we describe the GRelC library which is layered on top of the Globus Toolkit. The user can build client applications on top of it that can easily get access to and interact with data resources.

关键词： Libraries Grid computing Distributed computing XML Instruments Access protocols Middleware Computer architecture technology management Relational databases

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Integrating speech enabled services in a Web-based e-learning environment

Integrating speech enabled services in a Web-based e-learnin...

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

作者： S. Werner M. Wolff M. Eichner R. Hoffmann Laboratory of Acoustics and Speech Communication Dresden University of Technology Dresden Germany

We investigate the deployment possibilities of speech enabled services in a Web based e-learning environment. The integration of speech technology is realized with a client/server architecture. Therefore, the services speech synthesis, speech recognition, and speaker verification are installed at a central SpeechServer. The client uses a Java applet (SpeechApplet), which is integrated in an HTML page. It takes the user's input (e.g. speech or text input) and activates the according service at the SpeechServer. The SpeechApplet is easy to integrate into existing Web pages and aims at a simple JavaScript interface for communication between the Web page and the applet. In this paper we introduce this system, explain different modules, and discuss first evaluation results of these technologies.

关键词： Electronic learning Speech coding information technology

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A nonrepudiable bitstring commitment scheme based on a public-key cryptosystem

A nonrepudiable bitstring commitment scheme based on a publi...

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

作者： J. Castella-Roca J. Domingo-Ferrer Department of Computer Engineering and Mathematics Universitat Rovira i Virgili Catalonia Spain

Commitment schemes are building blocks for guaranteeing fairness in higher-level cryptographic protocols such as mental poker protocols and others. A party Alice commits to a value v (a bit or a bitstring) without revealing it. Alice should not be able to cheat by opening the commitment as v' /spl ne/ v nor to deny having committed at all. Most commitment schemes in the literature rely on hash functions, which should be strongly collision-free for the scheme to be secure. Yet collision-freeness can only be empirically checked and cannot be met with total certainty. We present a commitment scheme which avoids hash functions by using a public-key cryptosystem instead.

关键词： Public key cryptography Cryptographic protocols Mathematics Electronic mail Proposals Protection information security information technology Access protocols Public key

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Problems and solutions in machine translation involving Arabic, Chinese and French

Problems and solutions in machine translation involving Arab...

引用

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

作者： H. Alsharaf S. Cardey P. Greenfield Y. Shen French Language Unit Kuwait University Kuwait Centre Tesnière Universita de Franche-Comté France

In this paper we illustrate problems encountered together with proposed solutions when machine translation has to deal with languages with different family origins. The languages chosen are Classical Arabic, Mandarin Chinese and French. The machine translation architectures used are an adapted transfer methodology, and a "global" methodology in seven steps, which is new. What is common between the problems encountered is semantics. If one wishes to have machine translation of high quality there are two issues that must be resolved. The first of these is the semantic aspect of the linguistic units and the second is that the translation calculus has to be adapted to the languages to be processed.

关键词： Natural languages Taxonomy Calculus Productivity Dictionaries information technology

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Source signal based rate adaptation for GSM AMR speech codec

Source signal based rate adaptation for GSM AMR speech codec

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

作者： J. Makinen J. Vainio Audio and Visual Systems Laboratory Nokia Research Center Finland

Adaptive multirate (AMR) codec was standardised for GSM in 1999. AMR offers substantial improvement over previous GSM speech codecs in error robustness by adapting speech and channel coding depending on channel conditions. However, current standard do not exploit the multirate capability of AMR codec in source signal based adaptation that would optimise the average bit-rate vs. quality trade-off. This paper presents a source signal based rate adaptation algorithm for AMR codec in GSM system. Together with fast power control, it can be used to increase the system capacity and further increase the robustness of GSM AMR codec.

关键词： GSM Automatic speech recognition Speech codecs Knowledge based systems Bit rate Switches Visual system Laboratories Robustness Speech coding

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A secure account-based mobile payment protocol

A secure account-based mobile payment protocol

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

作者： S. Kungpisdan B. Srinivasan Phu Dung Le School of Network Computing Monash University Australia

In this paper, we propose a secure account-based payment protocol which is suitable for wireless networks. The proposed protocol employs symmetric-key operations which require lower computation at all engaging parties than existing payment protocols. The proposed protocol also satisfies transaction security properties provided by public-key based payment protocols such as SET and iKP. The formal analysis illustrates that our protocol achieves the goals of payment protocols. Moreover, the credit-card information is not required to be sent during transactions which results in a security enhancement of the system.

关键词： Cryptographic protocols Wireless networks Public key Wireless application protocol Communication system security Public key cryptography Computer networks information security Costs Performance analysis

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A secure electronic examination protocol using wireless networks

A secure electronic examination protocol using wireless netw...

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

作者： J. Herrera-Joancomarti J. Prieto-Blazquez J. Castella-Roca Estudis dInformàtica i Multimèdia Universitat Oberta de Catalunya Barcelona Spain

Electronic examinations are those examinations performed through a computer where questions and answers are computer files rather than sheets of paper. The temptation of using electronic examinations as a distance learning evaluation tool is obvious. However, security concerns must be considered. In this paper, we present a secure electronic examination protocol. Using wireless technology, we propose a trade-off solution between examination security (in terms of examination result correctness) and examination flexibility.

关键词： Wireless application protocol Wireless networks Network servers Electronic learning Electronic voting Access protocols Computer networks Communication system security information management Authentication

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Robust partner selection scheme for information quality assurance despite uncertainty in open multi-agent systems

Robust partner selection scheme for information quality assu...

引用

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

作者： K.S. Barber J. Park The Laboratory for Intelligent Processes and Systems University of Texas Austin USA

information quality assurance despite uncertainty can be investigated in the context of soft security where an agent maintains trustworthiness evaluations of its information sources to assist in the evaluation of incoming information quality. Dependency inherently exists in a system where agents do not have self-sufficient sensing or data collection capabilities. In other words, an agent requires information from others to achieve its goals. Finding the best partners to form an information sharing network using the notion of trustworthiness can be triggered by dependency adaptation. This research experimentally demonstrates that dependency adaptation can lead a system to form an information sharing network which results in high efficiency and information quality.

关键词： Robustness Quality assurance Uncertainty Multiagent systems information security Laboratories Intelligent systems Intelligent agent Data security Subcontracting

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JPEG compression immune steganography using wavelet transform

JPEG compression immune steganography using wavelet transfor...

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

作者： J. Xu A.H. Sung P. Shi Q. Liu Department of Computer Science New Mexico Technology USA

Steganography is art of hiding a secret media in another media. One of the major challenges in steganography is robustness, since the stego-signal need to survive multiple kinds of data processing. Low pass filtering, for example JPEG compression, is known as a common attack against stego-signal in image based steganography. We present a new method of image steganography that is extremely robust against JPEG compression while allowing error free information extracting. The method is based on 2D lossless wavelet transform and convolution error correction coding. Experimental results show that hidden information can be retrieved with zero bit error rates even when the stego-image experienced maximum JPEG compression.

关键词： Transform coding Steganography Wavelet transforms Image coding Robustness Art Data processing Low pass filters Filtering Data mining

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Wearable, wireless brain computer interfaces in augmented reality environments

Wearable, wireless brain computer interfaces in augmented re...

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

作者： K.F. Navarro University of Technology Sydney Australia

After Pierre Gloor and Hans Berger discovered the human electroencephalogram or EEG produced in the brain in 1969, brain computer interfaces (BCIs) became a reality. However, for more than a couple of decades, besides the common social fascination with such devices, they have not yet been considered as a feasible alternative interface for common daily activities. This is attributed to issues such as response time, costs and long initial user training periods. We define and outlines the current BCI technologies and reviews the current status of BCIs in the context of wearable computers. The use of augmented reality environments and the integration of wireless technologies such as Bluetooth are proposed as potential catalysts in the process of incorporating BCIs into daily life.

关键词： Brain computer interfaces Augmented reality Wearable computers Humans Delay Electroencephalography Costs Bluetooth Electromyography Signal processing

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