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A practical approach: Localization-based global metadata registry for progressive data integration

Journal of Information and Knowledge Management 2003年第4期2卷 391-401页

作者： Jeong, Dongwon Baik, Doo-Kwon Park, Soo-Hyun Software System Laboratory Department of Computer Science and Engineering Korea University South Korea School of Business IT Kookmin University South Korea

Until now, many researches based on metadata have been studied for data integration in various fields. However, there exists a problem in that the existing approaches still require much cost to build an initial guideline, which is sometimes called as a registry, global metadata set. The most critical problem of existing researches is that the researches have not been seriously considered on the corresponding domain properties- data level and user level. Most of all, it is difficult to create a standardized guideline on the entire data with the restricted cost. In this paper, we propose a method to progressively integrate databases considering the domain properties under limited cost. For instance, in scientific data, general users are interested in the simple and easy scientific data, which has low complexity. On the other hand, scientists or experts can utilize more detailed and specialized data as well as the general data. It means that an initial data quantity to be integrated is determined by the relationship of the domain properties. We show the implementation results of applying it to scientific data managed by Korea Institute of Science and Technology Information. The proposed method provides a progressive data integration mechanism, and especially it gives successful and efficient output on the creation of a standard guideline in the situation where the given cost is limited. © 2003 iKMS & World Scientific Publishing Company.

关键词： data element dynamic metadata management Metadata metadata registries

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Analysis of motion-based coding for sign language video communication applications

Analysis of motion-based coding for sign language video comm...

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Proceedings of the IASTED International Conference on Information and Knowledge Sharing

作者： Saksiri, Benjaporn Aramvith, Supavadee Phongphanphanee, Chai Info. System Engineering Laboratory Department of Computer Engineering Chulalongkorn University Bangkok 10330 Thailand Department of Electrical Engineering Chulalongkorn University Bangkok 10330 Thailand

ISBN: (纸本)0889863962

Digital video communications have been characterized by an exponential growth in the last decades. The continuous growth causes an evolution of several new applications such as video conferencing, video e-mail, mobile video, video streaming over internet, and sign language video communication, etc. To transmit video over internet or wireless networks, such applications needs digital video coding algorithm such that video could be compressed to meet bandwidth requirements. In this paper, we focus on the study of motion estimation and compensation in sign language video coding. We discuss and identify the approach of utilizing such motion information of sign language video for efficient sign language video communication applications.

关键词： Motion estimation

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OpenMP and compilation issue in embedded applications

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International Workshop on OpenMP Applications and Tools, WOMPAT 2003

作者： Oh, Jaegeun Kim, Seon Wook Kim, Chulwoo Advanced Computer Systems Laboratory Korea University Korea Republic of Integrated System and Processor Laboratory Department of Electronics and Computer Engineering Korea University Seoul Korea Republic of

ISBN: (纸本)9783540404354

Currently embedded systems become more and more important and widely applied to everywhere around us, such as a mobile phone, a PDA, an HDTV, and so on. In this paper, we applied OpenMP to non-traditional benchmarks, i.e. embedded applications in order to examine the applicability of OpenMP in this area. We parallelized embedded benchmarks, called EEMBC, consisting of 5 categories and total 34 applications, and measure their performance in detail. From experiment, we could find 90 parallel sections in 17 applications, but we achieved speedup only in four applications. Since embedded applications consists of a chunk of small loops, we could not get speedup due to large parallelization overheads such as thread management and instruction overheads. Also we show that the OpenMP-inserted parallel code size is much larger than a serial version due to multithreaded libraries, which is critical to embedded systems because of their limited size of memory systems. We discuss an identified critical, but a trivial problem in the current OpenMP specification when we applied OpenMP to these applications. © Springer-Verlag Berlin Heidelberg 2003.

关键词： Embedded systems

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DCM/Diff.D: A threshold-less and dynamic decision making receiver design for improved transmission performance 9

DCM/Diff.D: A threshold-less and dynamic decision making rec...

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9th IEEE Asia-Pacific Conference on Communications, APCC 2003, in conjunction with 6th Malaysia International Conference on Communications, MICC 2003

作者： Abbas, N. Abdullah, M.K. Abas, A.F. Photonics Laboratory Computer and Communication System Eng. Dept. Facutly of Engineering Serdang Selnagor Darul EhsanUPM 43400 Malaysia

ISBN: (纸本)0780381149

The simulation results and analysis of a novel transmission technique namely double carrier modulation/differential detection are presented, we show how the differential detection technique improves the system performance significantly, we also demonstrate that this technique overcomes the problems associated with voltage threshold in conventional systems, and how it suggest the possibility to double up the conventional long distance without amplifiers with a BER of as good as 10-13 at 2.5 Gbps over 150 Km distance with 0 dBm transmit power. The new scheme also shows a much slower degradation with distance than that of conventional IM/DD system. © 2003 IEEE.

关键词： Threshold voltage

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Building-block identification by simultaneity matrix

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Lecture Notes in computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics) 2003年 2724卷 1566-1567页

作者： Aporntewan, Chatchawit Chongstitvatana, Prabhas Intelligent System Laboratory Department of Computer Engineering Chulalongkorn University Bangkok 10330 Thailand

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An adaptive multimedia transmission protocol for distributed multimedia applications 23

An adaptive multimedia transmission protocol for distributed...

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23rd International Conference on Distributed Computing systems Workshops, ICDCSW 2003

作者： Chen, Shu-Ching Shyu, Mei-Ling Gray, I. Lu, Hongli Distributed Multimedia Information System Laboratory School of Computer Science Florida International University MiamiFL33199 United States Department of Electrical and Computer Engineering University of Miami Coral GablesFL33124 United States

ISBN: (纸本)0769519210

In this paper, an end-to-end real-time adaptive protocol for multimedia transmission is presented. The transmission rate is determined by the quadratic probing algorithm that can obtain the maximal utilization of the client buffer and minimal allocation of the network bandwidth. It is also coupled with a congestion control mechanism that can effectively decrease the packet loss rate during network congestion. We investigate the performance of our quadratic probing algorithm in different congestion levels under both Local Area Net (LAN) and Internet environment. Performance analysis reveals that our approach is more robust in avoiding overflow and underflow in different network congestion levels, and adapting to the changing network delays. Comparisons are made with the fixed rate approach and the rate by playback requirement approach. Experimental results show that the proposed real time protocol with rate adjusting quadratic probing algorithm is efficient in utilizing the network resources and decreasing the packet loss ratios. © 2002 IEEE.

关键词： Real time systems

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An open multiple instance learning framework and its application in drug activity prediction problems 3

An open multiple instance learning framework and its applica...

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3rd IEEE Symposium on BioInformatics and Bioengineering, BIBE 2003

作者： Huang, Xin Chen, Shu-Ching Shyu, Mei-Ling Distributed Multimedia Information System Laboratory School of Computer Science Florida International University MiamiFL33199 United States Department of Electrical and Computer Engineering University of Miami Coral GablesFL33124 United States

ISBN: (纸本)0769519075

In this paper, a powerful open Multiple Instance Learning (MIL) framework is proposed. Such an open framework is powerful since different sub-methods can be plugged into the framework to generate different specific Multiple Instance Learning algorithms. In our proposed framework, the Multiple Instance Learning problem is first converted to an unconstrained optimization problem by the Minimum Square Error (MSE) criterion, and then the framework can be constructed with an open form of hypothesis and gradient search method. The proposed Multiple Instance Learning framework is applied to the drug activity problems in bioinformatics applications. Specifically, experiments are conducted on the Musk-1 dataset to predict the binding activity of drug molecules. In the experiments, an algorithm with the exponential hypothesis model and the Quasi-Newton method is embedded into our proposed framework. We compare our proposed framework with other existing algorithms and the experimental results show that our proposed framework yields a good accuracy of classification, which demonstrates the feasibility and effectiveness of our framework. © 2003 IEEE.

关键词： Bioinformatics

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Image database retrieval utilizing affinity relationships

Image database retrieval utilizing affinity relationships

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MMDB 2003: Proceedings of the First ACM International Workshop on Multimedia Databases

作者： Shyu, Mei-Ling Chen, Shu-Ching Chen, Min Zhang, Chengcui Sarinnapakorn, Kanoksri Department of Electrical and Computer Engineering University of Miami Coral Gables FL 33124 United States Distributed Multimedia Information System Laboratory School of Computer Science Florida International University Miami FL 33199 United States

ISBN: (纸本)1581137265

Recent research effort in Content-Based Image Retrieval (CBIR) focuses on bridging the gap between low-level features and high-level semantic contents of images as this gap has become the bottleneck of CBIR. In this paper, an effective image database retrieval framework using a new mechanism called the Markov Model Mediator (MMM) is presented to meet this demand by taking into consideration not only the low-level image features, but also the high-level concepts learned from the history of user's access pattern and access frequencies on the images in the database. Also, the proposed framework is efficient in two aspects: 1) Overhead for real-time training is avoided in the image retrieval process because the high-level concepts of images are captured in the off-line training process. 2) Before the exact similarity matching process, Principal Component Analysis (PCA) is applied to reduce the image search space. A training subsystem for this framework is implemented and integrated into our system. The experimental results demonstrate that the MMM mechanism can effectively assist in retrieving more accurate results from image databases. Copyright 2003 ACM.

关键词： Content based retrieval

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Incorporating real-valued multiple instance learning into relevance feedback for image retrieval

Incorporating real-valued multiple instance learning into re...

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2003 International Conference on Multimedia and Expo, ICME 2003

作者： Hunag, Xin Chen, Shu-Ching Shyu, Mei-Ling Distributed Multimedia Information System Laboratory School of Computer Science Florida Lntemational University MiamiFL33 199 United States Department of Electrical and Computer Engineering University of Miami Coral GablesFL33124 United States

ISBN: (纸本)0780379659

This paper presents a content-based image retrieval (CBIR) system that incorporates real-valued multiple instance learning (MIL) into the user relevance feedback (RF) to learn the user's subjective visual concepts, especially where the user's most interested region and how to map the local feature vector of that region to the high-level concept pattern of the user. RF provides a way to obtain the subjectivity of the user's high-level visual concepts, and MIL enables the automatic learning of the user's high-level concepts. The user interacts with the CBIR system by relevance feedback in a way that the extent to which the image samples retrieved by the system are relevant to the user's intention is labeled. The system in turn applies the MIL method to find user's most interested image region from the feedback. A multilayer neural network that is trained progressively through the feedback and learning procedure is used to map the low-level image features to the high-level concepts. © 2003 IEEE.

关键词： Search engines

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Self-adapting, self-optimizing runtime management of Grid applications using PRAGMA

Self-adapting, self-optimizing runtime management of Grid ap...

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International Parallel and Distributed Processing Symposium, IPDPS 2003

作者： Zhu, H. Parashar, M. Yang, J. Zhang, Y. Rao, S. Hariri, S. Applied Software System Laboratory Dept. of Electrical and Computer Engineering Rutgers State University of New Jersey PiscatawayNJ08854 United States High Performance Distributed Computing Dept. of Electrical and Computer Engineering University of Arizona TucsonAZ85721 United States

ISBN: (纸本)0769519261

The emergence of the computational Grid and the potential for seamless aggregation, integration and interactions has made it possible to conceive a new generation of realistic, scientific and engineering simulations of complex physical phenomena. The inherently heterogeneous and dynamic nature of these application and the Grid presents significant runtime management challenges. In this paper we extend the PRAGMA framework to enable self adapting, self optimizing runtime management of dynamically adaptive applications. Specifically, we present the design, prototype implementation and initial evaluation of policies and mechanisms that enable PRAGMA to autonomically manage, adapt and optimize structured adaptive mesh refinement applications (SAMR) based on current system and application state and predictive models for system behavior and application performance. We use the 3-D adaptive Richtmyer-Meshkov compressible fluid dynamics application and Beowulf clusters at Rutgers University, University of Arizona, and NERSC to develop our performance models, and define and evaluate our adaptation policies. In our prototype, the predictive performance models capture computational and communicational loads and, along with current system state, adjust processors capacities at runtime to enable the application to adapt and optimize its performance. © 2003 IEEE.

关键词： Three dimensional computer graphics

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