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Journal of Knowledge Management 2005年第5期9卷 85-96页

作者： Vrandečić, Denny Pinto, Sofia Tempich, Christoph Sure, York University of Karlsruhe Institute of Applied Informatics and Formal Description Methods 76128 Karlsruhe Germany Department of Computer Science and Engineering Instituto Superior Tecnico Technical University of Lisbon Lisbon Portugal Institute of Applied Computer Science and Formal Description Methods University of Karlsruhe 76128 Karlsruhe Germany

Purpose - Aims to present the ontology engineering methodology DILIGENT, a methodology focussing on the evolution of ontologies instead of the initial design, thus recognizing that knowledge is a tangible and moving target. Design/methodology/approach - First describes the methodology as a whole, then detailing one of the five main steps of DILIGENT. The second part describes case studies, either already performed or planned, and what we learned (or expect to learn) from them. Findings - With the case studies it was discovered the strengths and weaknesses of DILIGENT. During the evolution of ontologies, arguments need to be exchanged about the suggested changes. Identifies those kind of arguments which work best for the discussion of ontology changes. Research implications - DILIGENT recognizes ontology engineering methodologies like OnToKnowledge or Methontology as proven useful for the initial design, but expands them with its strong focus on the user-centric further development of the ontology and the provided integration of automatic agents in the process of ontology evolution. Practical implications - With DILIGENT the experience distilled from a number of case studies and offers the knowledge manager a methodology to work in an ever-changing environment. Originality/value - DILIGENT is the first methodology to put focus not on the initial development of the ontology, but on the user and his usage of the ontology, and on the changes introduced by the user. We take the user's own view seriously and enable feedback towards the evolution of the ontology, stressing the ontology's role as a shared conceptualisation. © Emerald Group Publishing Limited.

关键词： computer applications Knowledge management systems Semantics User interfaces

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Using Semantic Web Mining technologies for personalized e-Learning experiences

Using Semantic Web Mining technologies for personalized e-Le...

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4th IASTED International Conference on Web-Based Education, WBE 2005

作者： Markellou, Penelope Mousourouli, Ioanna Spiros, Sirmakessis Tsakalidis, Athanasios Research Academic Computer Technology Institute 61 Riga Feraiou str. 26221 Patras Greece University of Patras Computer Engineering and Informatics Department 26504 Patras Greece Technological Education Institute of Messolongi Department of Applied Informatics in Administration and Economics 30200 Messolongi Greece

ISBN: (纸本)0889864802

The challenge of the Semantic Web Mining technologies in the e-Learning domain can relate to the provision of personalized experiences for the users. Particularly, these applications can take into consideration the individual needs and requirements of learners. In this paper, we propose a framework for personalised e-Learning based on aggregate usage profiles and a domain ontology. We have distinguished two stages in the whole process, one of offline tasks that includes data preparation, ontology creation and usage mining and one of online tasks that concerns the production of recommendations.

关键词： Ontology

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Owl: Next generation system monitoring

Owl: Next generation system monitoring

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2005 Computing Frontiers Conference

作者： Schulz, Martin Lee, Hsien-Hsin S. White, Brian S. McKee, Sally A. Jeitner, Jürgen Center for Applied Scientific Computing Lawrence Livermore National Laboratory School of Electrical and Computer Engineering Georgia Institute of Technology Computer Systems Lab. Cornell University Department of Informatics Technische Universität München

ISBN: (纸本)1595930183

As microarchitectural and system complexity grows, comprehending system behavior becomes increasingly difficult, and often requires obtaining and sifting through voluminous event traces or coordinating results from multiple, non-localized sources. Owl is a proposed framework that overcomes limitations faced by traditional performance counters and monitoring facilities in dealing with such complexity by pervasively deploying programmable monitoring elements throughout a system. The design exploits reconfigurable or programmable logic to realize hardware monitors located at event sources, such as memory buses. These monitors run and writeback results autonomously with respect to the CPU, mitigating the system impact of interrupt-driven monitoring or the need to communicate irrelevant events to higher levels of the system. The monitors are designed to snoop any kind of system transaction, e.g., within the core, on a bus, across the wire, or within I/O devices. Copyright 2005 ACM.

关键词： Monitoring

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An architecture for mobile-health care service provision

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WSEAS Transactions on computers 2005年第11期4卷 1502-1509页

作者： Votis, K. Vassiliadis, B. Tsaknakis, J. Stefani, A. Ioannou, K. Drossos, L. Dept. of Computer Engineering and Informatics University of Patras Patras Greece Department of Computer Science Hellenic Open University Greece Dept. of Electrical and Computer Engineering University of Patras Patras Greece Dept. of Applied Informatics in Management and Economy Technical Education Institute of Messologi Greece

This paper introduces the architecture of an open information and communication platform that integrates all relevant participants in health and social sector. The main concept of the proposed platform is based on concept introduced by new computing paradigms and the need of transformation of the existing internetworking and web technologies into a human resource pool that will be accessible by anyone, at anytime, and from everywhere in support of their needs. This platform intends to create the essential infrastructure for the provisioning of health and social services to individuals that receive residential care using Peer-to-Peer (P2P) networks over Internet, GSM and PSTN networks. The use of new computing models such as Service-Oriented computing, Grid, P2P and argumentation technologies are discussed. Furthermore, the functional requirements and the architecture of a complete solution are presented.

关键词： Intelligent agents

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Embedding advanced geometric techniques into SQL for efficient indexing of mobile objects

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WSEAS Transactions on computers 2005年第11期4卷 1517-1525页

作者： Sioutas, S. Drossos, L. Tsolis, D. Papatheodorou, T.S. Computer Engineering and Informatics Department University of Patras Building B University Campus 26500 Rion Patras Greece Technological Institute of Messolongi Department of Applied Informatics in Administration and Economics Technological Institute Campus 30200 Messolongi Greece

It is of great importance a trial to embed new geometric techniques into SQL in order to achieve more efficient indexing of objects moving on the plane and answer range queries about their future positions. This problem is motivated by real-life applications, such as allocating more bandwidth for areas where high concentration of mobile phones is imminent, or predicting future congestion areas in a highway Geographic Information System (GIS). We consider the problem in the external memory model of computation and present a variety of dynamic techniques.

关键词： Computational geometry

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Workflow - coordinated integration of enterprise/ industrial systems based on a semantic service - oriented architecture

Workflow - coordinated integration of enterprise/ industrial...

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International Conference on Emerging Technologies and Factory Automation (ETFA)

作者： C. Alexakos A.P. Kalogeras S. Likothanassis J. Gialelis S. Koubias Pattern Recognition Laboratory Department of Computer Engineering and Informatics University of Patras Rio Greece Industrial Systems Institute Science Park Platani Greece Pattern Recognition Laboratory Department of Computer Engineering and Informatics Engineering and Informatics University of Patras Rio Greece Research Academic Computer Technology Institute Patras Greece Applied Electronics Laboratory Department of Electrical and Computer Engineering University of Patras Rio Greece

Enterprise integration is significant for the enforcement of novel business models in an enterprise/industry. The great heterogeneity of systems/applications in the enterprise environment requires the introduction of interoperability aspects in order to resolve integration problems in a flexible and dynamic way. Our approach introduces an advanced enterprise semantic model representing both enterprise structure and available services, through the use of ontologies. The model is associated by a specific architecture that uses the above model in combination with state-of-the-art technologies such as Web services and workflows

关键词： Application software Ontologies Web services Semantic Web computer architecture Service oriented architecture Logic Internet Electronics industry Industrial electronics

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New E-learning tools for DC-DC converters

New E-learning tools for DC-DC converters

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2005 European Conference on Power Electronics and Applications

作者： Hamar, J. Funato, H. Ogasawara, S. Nagy, I. Ogasawara and Funato Laboratory Dept. of Electrical and Electronic Engineering Utsunomiya University 7-1-2 Yoto Utsunomiya-shi Tochigi 321-8585 Japan Budapest University of Technology and Economics Department of Automation and Applied Informatics Goldmann György tér 3 H-1111 Budapest Hungary Computer and Automation Institute Hungarian Academy of Sciences Hungary

ISBN: (纸本)9075815085

The paper gives an overview of the Yoto project, a novel e-learning initiative to build up an electrical engineering knowledge base. It also presents a new e-module of the project relating to the steady-state operation of dc-dc converters. The multimedia rich module contains numerous interactive tools promoting the high level education in the academy sector and the vocational trainings in the industry. The interactive tools also highly support the circuit design process by enabling fast calculation and access to relevant circuit quantities and waveforms (voltages and currents) in steady-state without long simulations.

关键词： DC-DC converters

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Some new algorithms for knowledge discovery in local hypertext corpora

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WSEAS Transactions on Circuits and Systems 2005年第11期4卷 1493-1500页

作者： Vassiliadis, B. Stefani, A. Drossos, L. Ioannou, K. Computer Science Hellenic Open University 13-15 Tsamadou st. GR-26222 Patras Greece Department of Applied Informatics in Management and Economy Technical Education Institute of Messologi Messologi Greece Wireless Telecommunication Laboratory Department of Electrical and Computer Engineering University of Patras Rion 26500 Patras Greece

The wealth of information available in the internet or local corpora has increased while our ability to search and retrieve relevant information is being reduced. Hypermedia, being complex information objects, are difficult to manage. In this paper we propose some new algorithms for searching and retrieving hypermedia documents from a local server by taking advantage content and context information. Besides presenting new solutions for hypertext, we review the state of the art in multimedia data mining and present future trends in this research area.

关键词： Data mining

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Optical transmitter bandwidth requirements for POF telecom links

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WSEAS Transactions on Circuits and Systems 2005年第11期4卷 1608-1613页

作者： Louvros, S. Ioannou, K. Vassiliadis, B. Drossos, L. Kotsopoulos, S. Wireless Telecommunication Laboratory Department of Electrical and Computer Engineering University of Patras Rion 26500 Patras Greece Computer Science Hellenic Open University 13-15 Tsamadou st. GR-26222 Patras Greece Department of Applied Informatics in Management and Economy Technical Education Institute of Messologi Messologi Greece

Light emitting diodes (LED) are usually the alternative optoelectronic devices for optical communications with moderate bandwidth efficiency and bit rates, compared to semiconductor lasers. Laser applications dominate the long distance communication networks. However LED seems to be a very good solution, especially in very short distance communication networks, where Plastic Optical Fibers, (POF) are used as the optical transmission medium. This paper investigates a qualitative technique of calculating the bandwidth, based on first principles of semiconductor physics. This technique is more convenient for a first approach of the subject on optical communication networks and its simplicity provides a very useful analytical tool. Finally these results are compared with the existing experimental ones.

关键词： Optical links

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Providing service standardisation for virtual enterprises

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WSEAS Transactions on Circuits and Systems 2005年第11期4卷 1545-1552页

作者： Vassiliadis, B. Tsaknakis, J. Drossos, L. Sirmakessis, S. Ioannou, K. Internet and Multimedia Technologies Academic Research Computer Technology Institute Patras Greece Computer Science Hellenic Open University 13-15 Tsamadou st. GR-26222 Patras Greece Department of Applied Informatics in Management and Economy Technical Education Institute of Messologi Messologi Greece Wireless Telecommunication Laboratory Department of Electrical and Computer Engineering University of Patras Rion 26500 Patras Greece

Virtual Enterprises are a, relatively, new business model that is greatly depended on network technology. Providing services in such an environment is a challenge in itself;architectural, technological and organisational difficulties have not permitted yet the development of a framework for Virtual Enterprise enaction. In this paper we describe a Virtual Private Network architecture that uses special monitor and coordination processes in order to achieve efficient delivery of services and activities in Virtual Enterprise environments. We discuss the general architecture of the system, emphasising on the solutions used to monitor and co-ordinate various activities.

关键词： Virtual reality

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