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Frontiers in Education (FIE) Conference

作者： D.N. Batanov N.J. Dimmitt W. Chookittikul Computer Science and Information Management Asian Institute of Technology Pathum Thani Thailand Center for Language and Educational Technology Asian Institute of Technology Pathum Thani Thailand

The paper presents a Q&A model, which can be used as a basis for the development of educational software using component and framework based software development technology. The Q&A model is used to identify possible questions covering any subject based on Bloom's Taxonomy of learning in a cognitive domain (B.S. Bloom and D.R. Krathwohl, 1984). The proposed vertical framework is applied to an educational domain. It provides a specific pattern designed to be used with cognitive oriented subjects at a higher education level. The proposed framework is described in a document specification manner containing framework main component specifications, component interface definitions, and the pattern to link those components. An application implemented based on this framework is easily adopted, as it requires minimum changes to any learning and teaching environment: teachers can retain their styles of teaching and students can retain their styles of learning.

关键词： Education Educational technology Taxonomy programming profession Paper technology Software tools TV information technology Internet Time factors

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Modeling and forecasting of hourly transactions on a WWW and proxy cache server

Modeling and forecasting of hourly transactions on a WWW and...

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1999 Internet Workshop, IWS 1999

作者： Tantatsanawong, Panjai Phien, Huynh Ngoc Kanchanasut, Kanchana Computer Science and Information Management Program School of Advanced Technologies Asian Institute of Technology Thailand

ISBN: (纸本)0780359259

A modeling approach is introduced in this paper to capture the real characteristics of the WWW traffic, using a combination of Box-Jenkins models with seasonality removal. Fourier analysis and standardization are used to render seasonal data into non-seasonal data. However, seasonality cannot be completely removed by this approach, so both seasonal and non-seasonal models are employed and the best models are selected using posterior possibility criterion (PPC). In order to improve the forecasting accuracy, forecast values obtained by the developed models are adjusted by the difference percentage of the day of the week and by using this percentage adjusted values in place of the actual data, which are not available at the time of forecasting. With this adjustment, the developed models can provide very accurate forecast values, except for the case where the higher level of hierarchical proxy is shared by child proxies located in a different time zone. © 1999 IEEE.

关键词： Forecasting

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Feature Selection Using the Domain Relationship with Genetic Algorithms

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Knowledge and information Systems 1999年第3期1卷 377-390页

作者： Chaikla, Nidapan Qi, Yulu Computer Science and Information Management Division School of Advanced Technologies Asian Institute of Technology P.O. Box 4 Pathumthani Klong Luang12120 Thailand

Considering the importance of the domain relationship in eliminating noisy features in feature selection, we present an alternate approach to designing a multi-objective fitness function using multiple correlation for the genetic algorithm (GA), which is used as a search tool in the problem. Multiple correlation is a simple statistical technique that uses the multiple correlation coefficients to measure the relationship between a dependent variable and a set of independent variables within the domain space. Simulation studies were conducted on both real-world and controlled data sets to assess the performance of the proposed fitness function. The comparison between the traditional fitness function and our proposed function is also reported. The results show that the proposed fitness function can perform more satisfactorily than the traditional one in all cases considered, including different data types, multi-class and multi-dimensional data. © 1999, Springer-Verlag Singapore Pte. Ltd.

关键词： Genetic algorithms

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The AI3 CacheBone project

The AI3 CacheBone project

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1999 Internet Workshop, IWS 1999

作者： Kanchanasut, Kanchana Yamaguchi, Suguru Kiatsirivatana, Kriengsak Inoue, Hiroyuki Suksakorn, Apisit Tantatsanawong, Panjai Internet Research Lab Computer Science and Information Management Program School of Advanced Technologies Asian Institute of Technology P.0.Box 4. KIongluang Pathumthani12120 Thailand Graduate School of Information Science Nara Institute of Science and Technology 8916-5 Takayama Ikoma Nara630-0101 Japan

ISBN: (纸本)0780359259

Hierarchical WWW cache formation which provides both higher hit rates and saves overall bandwidth consumption through fetching WWW objects and periodically redistributing them among member caches is proposed as an application on a satellite Internet infrastructure. With regular prefetching and distribution of WWW objects, our system can utilize the satellite Internet with continuous streaming data transmissions for efficient WWW caching. Our system consists of a single hub cache and several rim caches. The hub cache is a core unit which is located at the satellite hub station and gathers WWW objects from the Internet, while the rim cache fetches requested WWW objects from the hub cache as well as receiving WWW objects pushed from the hub cache. The prefetching strategy of the rim cache is based on the statistical pattern analysis of user accesses. Traffic monitoring is used to manage both prefetching and object push operations. In order to reduce the consumption of bandwidth in the satellite Internet, multicast transmission of WWW objects is introduced. Furthermore, cached objects are checked regularly with an ''if update' tag so that their consistency can be maintained with reasonable overhead. We discuss our design and implementation of the AI3 CacheBone with our adaptive hierarchical WWW cache formation scheme. Through experiments, we show that the performance of our rim cache shows an improvement of approximately three fold when compared with ordinary hierarchical cache systems such as Squid. © 1999 IEEE.

关键词： Bandwidth

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Finding the estimated position of facial features on the human face using intensity computation

Finding the estimated position of facial features on the hum...

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IEEE Asia-Pacific Conference on Circuits and Systems

作者： Yulu Qi G. Brotosaputro N. Soonthomphisaj Computer Science and Information Management Asian Institute of Technology Bangkok Thailand

Most human face recognition approaches start with a detection of facial features (facial feature extraction). To extract the right facial features, a process for finding their exact position is needed. The aim of this paper is to find the estimated position of facial features using intensity computation and to explain pre-processing in facial feature extraction. For the computerized images used in this research, pixels were manipulated in intensity only, without changing their original position. The system performance was tested on 40 test data (20 good quality images and 20 interference images), locating eyes and lips line only. Using good quality images, the system can show all facial features expected and from interference images, the system only gives 90% of accuracy. Intensity computation is one possible method to find the estimated positions of facial features. The corner selection and capturing area processes give accurate results for locating the eyes and lips line.

关键词： Facial features Humans Face detection System testing Interference Eyes Lips Face recognition Data mining Pixel

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Metadata and content-based approaches to resource discovery 2nd

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2nd European Conference on Digital Libraries, ECDL 1998

作者： Baker, Thomas Klavans, Judith Computer Science & Information Management Asian Institute of Technology P.O. Box 4 Klong Luang12120 Thailand CRIA - Center for Research on Information Access Department of Information Services Columbia University 535 West 114th Street New YorkNY10027 United States

ISBN: (纸本)9783540651017

Researchers in multilingual information retrieval and natural language processing are making progress on algorithms for guessing what a text is about and for translating queries between languages;some day we may have reliable programs for recognizing musical melodies or the content of images. In contrast, researchers in metadata focus more on seeking consensus on the meanings of categories for describing resources;on finding ways to allow simple schemas to interoperate with complex ones;and on designing frameworks for managing the messy equivalencies between metadata models in different fields and languages. Do the two perspectives form a continuum? What problems do they solve best? For resource discovery, what is the best balance between human and machine? © Springer-Verlag Berlin Heidelberg 1998.

关键词： Metadata

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Orthogonal schemes for bidirectional associative memories

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IEEE TRANSACTIONS ON SYSTEMS MAN AND CYBERNETICS PART B-CYBERNETICS 1997年第3期27卷 543-551页

作者： Haryono Sadananda, R Phien, HN Department of Computer Science and Information Management Program of the Asian Institute of Technology Bangkok Thailand

Two issues are addressed in this paper. Firstly, it investigates some important properties of bidirectional associative memories (BAM) and proposes an improved capacity estimate. Those properties are the encoding form of the input pattern pairs as well as their decoding, the orthogonality of the pattern pairs, the similarity of associated patterns, and the density of the pattern pairs. Secondly, it proposes an implementation approach to improve the storage capacity. The approach embraces three proposed methods, i.e., the bipolar-orthogonal augmentation, the set partition, and the combined method. Along with those methods is the construction of the set of bipolar orthogonal patterns.

关键词： associative memory bidirectional memory heteroassociative memory neural networks

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Applying fuzzy functions and sequential coordination to optimization of machinery arrangement and pipe routing

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NAVAL ENGINEERS JOURNAL 1998年第6期110卷 43-54页

作者： Wu, BC Young, GS Schmidt, W Choppella, K Dr. Bi-Chu Wu:received a PhD in Mechanical Engineering from the University of Maryland College Park in 1991. She has worked on projects involving naval architecture design optimization solid mechanics and database development. Presently a senwr engineer with Angle Incorporated Dr Wu's research interests are in design optimization and fuzzy logic applications. Dr. Gin-Shu Young: a senior engineer with Angle Incorporated holds a PhD in Mechanical Engineering from the University of Maryland College Park. As a guest researcher with National Institute of Standards and Technologies from 1990 to 1993 he worked on vision-based navigation for autonomous vehicles. His experience also includes applications of optimization fuzzy logic neural network and genetic algorithm methods to engineering system design Mr. William Schmidt:co-founded Angle Incorporated in 1990 and has served as Vice PresidentlChiefScientist during this tame. He holds a B.Sc. in Applied Science from the Naval Acadt?my and an M.Sc. in Physics from the Naval Post Graduate School. He has cner 20 years experience in technical leadership material and personnel management. He has led the application of computer aided design (CAD) and Product Model Information Exchange to the shipbuilding industry. His experience also includes leading the amlication of model based operational analysis to support the Live Fire Test Program for DDG 51 Class Destroyers. Mr. Krishna M. Choppella:is a Sofware Engineer at Eidea Laboratories Incotporated where he works on componentbased distributed enterpvise frameworks. He has been involved in creating data analysis tools for the US Nay by integrating CAD modeis databases and graphical front ends. His work in the Masters degree program in Mechanical Engineering at the University of Texas at Austin was in di0ddase.r spectroscopy of combustion products in porous-matri burners. He received his Bachelors degree in Electrical Engineering in India. He was a Research Associate at the Centre for Laser Technology and Project Engi

Ship design is often multidisciplinary involving several design elements with various types of objectives and constraints (O/C) some easily described as mathematical formulas, others better modeled as descriptive assertions. This paper describes a method based on fuzzy functions and an integrated performance index to model O/C using descriptive assertions to be used with mathematical formulas in optimization. Another issue addressed in this paper concerns the coordination of design elements when sequentially coupled, that is, when one leads the other and the performance of the follower depends greatly on the design of the leader. Based on neuro-fuzzy techniques, the method described here coordinates and optimizes sequentially coupled elements. The two methods are applied to machinery arrangement (MA) and pipe routing (PR). Preliminary models for optimization of MA and PR are described considering convenience, producibility: engine room size, interference and location as factors in the O/C set. Some test results from MA/PR applications are presented and discussed. The methods are generic and can be extended to other elements in ship design. They are mutually independent and may be used separately Two advantages of their use are an improvement in overall performance and a reduction in the need for redesign of elements.

关键词： Optimization

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Fuzzy unification and resolution proof procedure for fuzzy conceptual graph programs 5th

Fuzzy unification and resolution proof procedure for fuzzy c...

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5th International Conference on Conceptual Structures, ICCS 1997

作者： Cao, Tru H. Creasy, Peter N. Wuwongse, Vilas School of Information Technology University of Queensland 4072 Australia Computer Science and Information Management Program Asian Institute of Technology P.O. Box 2754 Bangkok10501 Thailand

ISBN: (纸本)3540633081

Fuzzy conceptual graph programs are order-sorted fuzzy Iogic programs based on fuzzy conceptual graphs (FCGs). In this paper, we develop fuzzy unification and resolution proof procedure, taking into account fuzziness of FCGs and properties of fuzzy reasoning, for FCG programs. General issues of both CG and FCG unifications and resolution procedures are also analysed and solutions to them are proposed. The resolution procedure is proved to be sound with respect to the declarative semantics of FCG programs. © 1997, Springer-Verlag Berlin Heidelberg. All rights reserved.

关键词： Semantics

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Fuzzy modeling with genetic algorithms

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computerS AND ARTIFICIAL INTELLIGENCE 1997年第3期16卷 275-293页

作者： Wuwongse, V Veluppillai, S Computer Science and Information Management Program School of Advanced Technologies Asian Institute of Technology Bangkok Thailand

Recent applications of fuzzy control have created an urgent demand for fuzzy modeling techniques. Several methods for identification of fuzzy models from numerical input-output samples have been proposed. Among them, Sugeno and Yasukawa's method [6], which employs fuzzy c-means clustering, holds significant promises. This paper improves the method of Sugeno and Yasukawa. Identified fuzzy models are tuned at various stages by means of genetic algorithms, i.e., the numbers of input variables and rules are reduced and membership function parameters are adjusted. The technique, when applied to a nonlinear system, demonstrates its efficiency in a comparison with the original method of Sugeno and Yasukama.

关键词： fuzzy modeling fuzzy c-means clustering genetic algorithms

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