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IEEE Conference and Exhibition on Global Telecommunications (GLOBECOM)

作者： J. Tapolcai Pin-Han Ho Xiaohong Jiang S. Horiguchi Department of Electrical and Computer Engineering University of Waterloo ONT Canada Department of Telecommunications and Media Informatics Budapest University슠of슠Technology슠and슠Economics Budapest Hungary Graduate School of Information Science Japan Advanced Institute of Science and Technology Japan

The paper proposes a novel distributed control architecture for shared protection with reduced complete routing information, which aims to initiate a graceful compromise between the amount of link-state dissemination and the performance impairment due to the incompleteness of routing information. We first give explicit and comprehensive descriptions on a number of reported routing information dissemination scenarios for shared protection. A novel framework of link-state dissemination for facilitating shared protection, called reduced complete routing scenario, is introduced, in which the singular value decomposition (SVD) transformation is adopted to deal with the information reduction. We show, through simulation, that the proposed scheme can achieve a higher throughput and a better estimation in reconstruction of the spare provision matrix than the other schemes taking the same complexity of link-state dissemination.

关键词： Distributed control Protection Resource management Routing protocols Costs Scalability Information management computer architecture informatics Information science

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Mobile healthcare service system using RFID

Mobile healthcare service system using RFID

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IEEE International Conference on Networking, Sensing and Control

作者： Cheng-Ju Li Li Liu Shi-Zong Chen Chi Chen Wu Chun-Huang Huang Xin-Mei Chen Graduate Institute of Medical Informatics Taipei Medical University Taiwan Taipei Medical University and Hospital Taiwan Department of Information Engineering and Computer Science Feng Chia University FCU Taiwan LLC PK technology USA

ISBN: (纸本)0780381939

SARS (severe acute respiratory syndrome) has seriously hit to the worldwide for several months. Without a full understanding of the natural cause of illness and the mode of transmission, precautions are processed by the standard guidelines that lack of extensive system to identify and trace isolated persons, contact history of patients and infected disposals. To shorten the tracking time and increase the accuracy of infection, we introduce in this paper a MHS (mobile healthcare service) system, a platform that uses RFID (radio frequency identification) technologies and mobile devices for positioning and identifying persons and objects both for inside and outside hospital when disease taken place. Also, based on the applications for SARS infection control precautions, this system demonstrates how to receive patient's location and bio-information by using RFID technology for hospital and government to enact real-time infection control measures from the auditing mechanism among isolated patients in households or residential settings. Further, this model shows the possibility to bring medicare service that can become ubiquitous and can cross geographic barriers and enable medical information technology from e-Medicare to m-Medicare for future development in the medical industry.

关键词： Medical services radiofrequency identification Isolation technology Hospitals Medical control systems Control systems Guidelines History Diseases Government

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Approximating functions using rough sets

Approximating functions using rough sets

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Conference of the North American Fuzzy Information Processing Society - NAFIPS

作者： Z. Pawlak J. Peters A. Skowron Institute of Theoretical and Applied Informatics Polish Academy of Sciences Gliwice Poland Warsaw School of Information Technology Warsaw Poland Department of Electrical and Computer Engineering University of Manitoba Winnipeg MAN Canada Institute of Mathematics University of Warmia and Mazury Warsaw Poland

Approximating of functions that are specified using imperfect knowledge is one of the central issues of many areas such as machine learning, pattern recognition, data mining, or qualitative reasoning. However, we do not have yet satisfactory methods for approximation of functions and developed calculi on function approximations. In the paper we discuss a function approximation using the rough set approach. The main difference with the existing approaches in rough set theory is based on modification of the inclusion measure. This makes it possible to overcome some drawbacks of the previously used definitions. For applications it is important to develop rough measures on approximated objects, in particular on function approximations. The modified inclusion measure is also used to define an exemplary measure, i.e., the rough integral.

关键词： Rough sets Function approximation Information technology Data mining Set theory Particle measurements Extraterrestrial measurements Information systems informatics Mathematics

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AN EFFICIENT MULTI-PURPOSE OPTIMIZATION METHOD FOR QOS ROUTING USING GENETIC ALGORITHM

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Journal of Interconnection Networks 2004年第4期5卷 409-428页

作者： AKIO KOYAMA LEONARD BAROLLI GENCI CAPI BERNADY O. APDUHAN JUNPEI AraI ARJAN DURRESI Department of Informatics Yamagata University 4-3-16 Jonan Yonezawa Yamagata 992-8510 Japan Department of Information and Communication Engineering Fukuoka Institute of Technology (FIT) 3-30-1 Wajiro-Higashi Higashi-ku Fukuoka 811- 0295 Japan Department of System Management Fukuoka Institute of Technology (FIT) 3-30-1 Wajiro-Higashi Higashi-ku Fukuoka 811-0295 Japan Department of Intelligent Informatics Kyushu Sangyo University 2-3-1 Matsukadai Higashi-ku Fukuoka 813-8503 Japan Department of Information and Control Engineering Yamagata College of Industry and Technology 1-2-2 Matsuei Yamagata 990-2473 Japan Department of Computer Science Louisiana State University Baton Rouge LA 70803 USA

In order to support multimedia communication, it is necessary to develop routing algorithms that make decisions based on multiple Quality of Service (QoS) parameters. This is because new services such as video on demand and remote meeting systems have multiple QoS requirements. However, the problem of QoS routing is difficult because finding a feasible route with two independent path constraints is NP-complete problem. Also, QoS routing algorithms for broadband networks must be adaptive, flexible, and intelligent for efficient network management. In this paper, we propose a multi-purpose optimization method for QoS routing based on Genetic Algorithm (GA). The simulation results show that the proposed method has a good performance and therefore is a promising method for QoS routing.

关键词： Broadband Networks Genetic Algorithm QoS Routing Multi-purpose Optimization

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Spatial, temporal and spatio-temporal databases - Hot issues and directions for PhD research

Spatial, temporal and spatio-temporal databases - Hot issues...

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作者： Roddick, John F. Egenhofer, Max J. Hoel, Erik Papadias, Dimitris Salzberg, Betty Sch. of Informatics and Engineering Flinders University GPO Box 2100 Adelaide SA 5001 Natl. Ctr. for Geogr. Info./Analysis University of Maine Orono ME 04469-5711 United States Research and Development Environ. Systems Research Institute 380 New York Street Redlands CA 92373 United States Department of Computer Science Hong Kong Univ. of Sci./Technology Clearwater Bay Hong Kong Hong Kong Coll. of Comp./Information Science Northeastern University Boston MA 02115 United States

Spatial and temporal database systems, both in theory and in practice, have developed dramatically over the past two decades to the point where usable commercial systems, underpinned by a robust theoretical foundation, are now starting to appear. While much remains to be done, topics for research must be chosen carefully to avoid embarking on impractical or unprofitable areas. This is particularly true for doctoral research where the candidate must build a tangible contribution in a relatively short time. The panel session at the Eighth International Symposium on Spatial and Temporal Databases (SSTD 2003) held on Santorini Island, Greece [7] in July 2003 thus took as its focus the question What to focus on (and what to avoid) in Spatial and Temporal Databases : recommendations for doctoral research. This short paper, authored by the panel members, summarizes these discussions.

关键词： Database systems

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Policies for content filtering in educational networks: The case of Greece

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Telematics and informatics 2003年第1期20卷 71-95页

作者： Avgoulea, M. Bouras, C. Paraskevas, M. Stathakopoulos, G. Department of Computer Engineering and Informatics Computer Technology Institute University of Patras Riga Feraiou 61 26221 Patras Greece

The Internet removes all barriers to sending and receiving information. An increasing number of nations connect their schools on the Internet as an acknowledgment of its importance in education. Despite its undeniable usefulness, it also has certain perils. This study specifies and evaluates these, finding the technologies that are currently available to address filtering issues and comparing them. We present our proposed solution for the Greek School Network, and illustrate to what extent our solution successfully addresses the issues discussed. © 2002 Elsevier Science Ltd. All rights reserved.

关键词： Internet

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Evaluation of teleteaching services over ATM and IP networks

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Telematics and informatics 2003年第1期20卷 1-18页

作者： Bouras, Ch. Gkamas, A. Kapoulas, V. Tsiatsos, Th. Computer Technology Institute Riga Feraiou 61 GR-26221 Patras Greece Computer Engineering and Informatics Department University of Patras Riga Feraiou 61 GR-26221 Patras Greece

This paper presents the components of a synchronous teleteaching application, their underlying technology and their interaction with network services. In addition, it presents the architecture and design of a synchronous teleteaching application used over the public ATM network in Greece. This paper presents various teleteaching scenarios over an ATM network infrastructure with the use of native ATM and IP over ATM. In each scenario we present the standards used, the logical components, the resource demands (network and equipment) and its special characteristics. For each scenario we give detailed information about the transmission and frame rates and the video delay. The main result of our experiments is that broadband networks offer many capabilities for high quality teleteaching, and generally speaking, high quality telematic services. © 2002 Elsevier Science Ltd. All rights reserved.

关键词： computer aided instruction

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A sleep-awake protocol for information propagation in smart dust networks

A sleep-awake protocol for information propagation in smart ...

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International Parallel and Distributed Processing Symposium, IPDPS 2003

作者： Chatzigiannakis, Ioannis Nikoletseas, Sotiris Computer Technology Institute P.O. Box 1122 Patras26221 Greece Computer Engineering and Informatics Department University of Patras Patras26500 Greece

ISBN: (纸本)0769519261

Smart dust is a set of a vast number of ultra-small fully autonomous computing and communication devices, with very restricted energy and computing capabilities, that co-operate to quickly and efficiently accomplish a large sensing task. Smart dust can be very useful in practice i.e. in the local detection of a remote crucial event and the propagation of data reporting its realization. In this work we continue our effort towards the research on smart dust from a basic algorithmic point of view. Under a simple but realistic model for smart dust we present an interesting problem, which is how to propagate efficiently information on an event detected locally. Then we present anew smart dust protocol, which we call the "Sleep-Awake" protocol, for information propagation that explicitly uses the energy saving features (i.e. the alteration of sleeping and awake time periods) of the smart dust particles. By using both some simple probabilistic analysis and extensive experiments, we provide some first concrete results for the success probability and the time and energy efficiency of the protocol, in terms of parameters of the smart dust network. We note that the study of the interplay of these parameters allows us to program the smart dust network characteristics accordingly. © 2003 IEEE.

关键词： Energy efficiency

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Integrating adaptive web techniques with web services

Integrating adaptive web techniques with web services

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International Conference on Information technology - Coding and Computing

作者： Garofalakis, J Sakkopoulos, E Sirmakessis, S Tsakalidis, A RA Computer Technology Institute Internet and Multimedia Technologies Research Unit 61 Riga Feraiou Str. 26110 Greece University of Patras Computer Engineering and Informatics Department Patras 26500 Greece Hellenic Open University 84 K Palama Str. Patras 26442 Greece

ISBN: (纸本)0769519164

Enterprise software infrastructure traditionally comprises a number of independent systems in order to support customer needs and business processes complicating this way productivity, performance and maintenance. Instead there are hypermedia facilities based on widespread standards that provide over a user-friendly, well-known framework richer functionality and features. In the paper, we present the design, implementation and evaluation of the combined use of web services and adaptive web-based techniques. We describe a large-scale hypermedia framework that improves the efficiency and performance of conventional enterprise activities like customer services (registration, activation, billing, support) and document management. The presented approach aims to cover these fundamental needs for a network of customers, collaborators and intranet employees.

关键词： Web services

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On the efficient generation of elliptic curves over prime fields

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4th International Workshop on Cryptographic Hardware and Embedded Systems, CHES 2002

作者： Konstantinou, Elisavet Stamatiou, Yiannis C. Zaroliagis, Christos Computer Technology Institute P.O. Box 1122 Patras26110 Greece Department of Computer Engineering and Informatics University of Patras Patras26500 Greece

ISBN: (纸本)3540004092

We present a variant of the complex multiplication method that generates elliptic curves of cryptographically strong order. Our variant is based on the computation ofWeber polynomials that require significantly less time and space resources than their Hilbert counterparts. We investigate the time efficiency and precision requirements for generating off-line Weber polynomials and its comparison to another variant based on the off-line generation of Hilbert polynomials. We also investigate the efficiency of our variant when the computation of Weber polynomials should be made on-line due to limitations in resources (e.g., hardware devices of limited space).We present trade-offs that could be useful to potential implementors of elliptic curve cryptosystems on resource-limited hardware devices. © Springer-Verlag Berlin Heidelberg 2003.

关键词： Polynomials

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