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23rd Annual International Conference of the IEEE-Engineering-in-Medicine-and-Biology-Society

作者： Nagin, VA Potapov, IV Selishchev, SV Moscow State Inst Elect Technol Biomed Syst Dept Moscow Russia

ISBN: (纸本)0780372115

The paper presents and discusses a universal client/server object-oriented patient database system for clinical and personal applications. The developed system makes it possible to manage all patient specific data in the unified way by means of object-oriented representation of heterogeneous medical data, which include patient details, examination results and doctor visits history. The presented implementation includes a database server and a universal client application, which serves as a container for manifold medical applications that require database services. This approach enables to simplify drastically the implementation of database support in client applications and to put the main computational burden on the container application, which communicates with its clients by means of defined interface protocols.

关键词： database management OLE COM client/server biomedical data distributed database

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Data distribution method based on genetic algorithm

Data distribution method based on genetic algorithm

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6th International Conference for Young Computer Scientists

作者： Yu, H Wang, XK Dalian Univ Technol Dept Comp Sci & Engn Dalian 116023 Peoples R China

ISBN: (纸本)7506251817

The data distribution is a critical issue in distributed database design. It has been proved that it is a NP-hard problem. An efficient data distribution must consider the usability and reliability of the distributed data, the distribution of working load and the storage capacity of the nodes. We propose a 0-1 programming method for this problem. In our optimization model, the redundant data distribution and the storage capacity of the nodes are considered. A genetic algorithm is developed to solve this problem.

关键词： distributed database genetic algorithm data distribution

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Autonomous decentralized database system for assurance in heterogeneous e-business

Autonomous decentralized database system for assurance in he...

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25th Annual International Computer Software and Applications Conference (COMPSAC 2001)

作者： Leguizamo, CP Kato, S Hirai, K Mori, K Tokyo Inst Technol Dept Comp Sci Tokyo 1528552 Japan

ISBN: (纸本)0769513727

Due to the advancement in the Information Technology, different kind of companies with heterogeneous needs have had the necessity to cooperate among them to get more benefit in a continuos changing market. That is heterogeneous e-business. In order to cope with such kind of e-business, a platform which can effectively realize heterogeneous needs, real time, flexibility and fault-tolerance is needed. This paper focuses on the database field that is indispensable for the e-business. Thus, it proposes Autonomous Decentralized database System, which is composed of two techniques. In the first one, the concept of Allowable Volume (AV) is introduced, while in the second one, a Mobile Agent (MA) that adjusts the AV of each site is shown. Since the MA is always moving among the sites, and each site can always negotiate AV with the MA autonomously, the system can realize assurance. Furthermore, the effectiveness of the proposed system is shown by simulation.

关键词： e-business distributed database mobile agent assurance acceralator allowable volume

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THREE DIMENSIONAL GRID STRUCTURE FOR EFFICIENT ACCESS OF REPLICATED DATA

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Journal of Interconnection Networks 2001年第3期2卷 317-329页

作者： MUSTAFA MAT DERIS ALI MAMAT PUA CHAI SENG MOHD YAZID SAMAN University College Terengganu Faculty of Science and Technology 21030 Mengabang Telipot Kuala Terengganu Malaysia University Putra Malaysia Faculty of Computer Science and Information Technology 43400 UPM Serdang Malaysia

This article addresses the performance of data replication protocol in terms of data availability and communication costs. Specifically, we present a new protocol called Three Dimensional Grid Structure (TDGS) protocol, to manage data replication in distributed system. The protocol provides high availability for read and write operations with limited fault-tolerance at low communication cost. With TDGS protocol, a read operation is limited to two data copies, while a write operation is required with minimal number of copies. In comparison to other protocols. TDGS requires lower communication cost for an operation, while providing higher data availability.

关键词： distributed database replicated data grid quorum communication cost data availability

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ParcelCall - A Network of Cooperating Track & Trace Systems

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IFAC Proceedings Volumes 2001年第9期34卷 355-359页

作者： Torsten Caesar Hanno Walischewski Siemens ElectroCom GmbH & Co OHG D-78459 Konstanz Germany Phone: 07531-86 2603 Fax: 07531-86 83 2603

ParcelCall bridges gaps in today's Track & Trace (T&T) technology. Shipments are monitored continuously with positional accuracy by the means of satellite navigation systems. ParcelCall's backbone is an Internet connected network of goods tracing servers distributed at exchange points and mobile logistics servers on the respective transport services. This network enables a carrier interoperable T&T and combines the carriers' legacy IT-systems with a global logistics network. ParcelCall thereby provides both the consignor and consignee with proactive information for optimal consolidation to enhanced transport and delivery efficiency. The next step will be a seamless extension of ParcelCall into manufacturing supply chain management thereby enabling life cycle T&T of products and their components.

关键词： Telemonitoring Receptacle Asset Management Transport Management Production Monitoring Fleet Monitoring Production Monitoring Fleet Monitoring Data Exchange XML distributed database GPRS/UMTS WAP/SMS

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Managing Replicated Remote Procedure Using Three Dimensional Grid Structure Protocol

Managing Replicated Remote Procedure Using Three Dimensional...

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2001 International Symposium on distributed Computing and Applications to Business, Engineering and Science

作者： M.Mat Deris A.Mamat M.Y.Saman H.Ibrahim Department of Computer Science Faculty of Science and Technology College University Terengganu

This paper addresses the problem of building reliable computing programs over Three Dimensional Grid Structure Remote Procedure(TDGS-RP) systems by using replication and transaction *** first establish the computational model: The TDGS-RP ***,based on this transaction model,we present the design of our system for managing TDGS-RP transactions in the replicated-server environment.

关键词： Remote Procedure Request Procedure Transaction Replication distributed database

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A set of tools for building PostgreSQL distributed databases in biomedical environment.

A set of tools for building PostgreSQL distributed databases...

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22nd Annual International Conference of the IEEE-Engineering-in-Medicine-and-Biology-Society

作者： Cavalleri, M Prudentino, R Pozzoli, U Reni, G IRCCS E Medea Bosisio Parini LC Italy

ISBN: (纸本)078036466X

PostgreSQL is an advanced Object-Relational DBMS supporting SQL constructs and accessible with standard protocols. Its object-oriented features qualify it for managing biomedical data and it is freely available to the community vis the open-source philosophy. Unfortunately the current available version does not support any database distribution feature. The aim of the present work was to develop specific procedures In order to extend original potentials of PostgreSQL ORDBMS and make it able to manage distributed databases by means of asynchronous replication. Particular attention was devoted to conflict resolution rules, including several procedures with different degrees of restrictiveness and even giving the end user the possibility to write user-defined conflict resolution procedures, The replication system was tested at the IRCCS "E, Medea", an Italian Scientific and clinical research Institute spread over 5 sites in different geographical locations, The testing system was developed with the purpose to make clinical data collected by Epileptology Units in each site available to all branches, without having to care for their physical distribution, The proposed replica procedures manage only traditional (non-binary) data types because of the very different storage model of large objects. Since large objects are very common for treatment and storage of biomedical data, we are currently working on an improved version of the replica engine that allows large objects to be replicated.

关键词： distributed database ORDBMS biomedical data

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Knowledge based information integration systems

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INFORMATION AND SOFTWARE TECHNOLOGY 2000年第5期42卷 299-312页

作者： Paton, NW Goble, CA Bechhofer, S Univ Manchester Dept Comp Sci Informat Management Grp Manchester M13 9PL Lancs England

Information integration systems provide facilities that support access to heterogeneous information sources in a way that isolates users from differences in the formats, locations and facilities of those sources. A number of systems have been proposed that exploit knowledge based techniques to assist with information integration, but it is not always obvious how proposals differ from each other in their scope, in the quality of integration afforded, or in the cost of exploitation. This paper presents a framework for the comparison of proposals for information integration systems, and applies the framework to a range of representative proposals. It is shown that proposals differ greatly in all of the criteria stated and that the selection of an approach is thus highly dependent on the requirements of specific applications. (C) 2000 Elsevier Science B.V. All rights reserved.

关键词： knowledge based system distribution distributed database database ontology

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Image Retrieval by Examples

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IEEE TRANSACTIONS ON MULTIMEDIA 2000年第3期2卷 164-171页

作者： Brunelli, Roberto Mich, Ornella ITC Irst Interact Sensory Syst Div I-38050 Povo Italy

A currently relevant research field in information sciences is the management of nontraditional distributed multimedia databases. Two related key issues are to achieve an efficient content-based query by example retrieval and a fast response time. This paper presents the architecture of a distributed image retrieval system which provides novel solutions to these key issues. In particular, a way to quantify the effectiveness of low level visual descriptors in database query tasks is presented. The results are also used to improve the system response time, which is an important issue when querying very large databases. A new mechanism to adapt system query strategies to user behavior is also introduced in order to improve the effectiveness of relevance feedback and overall system response time. Finally, the issue of browsing multiple distributed databases is considered and a solution is proposed using multidimensional scaling techniques.

关键词： Clustering distributed database image database browsing image retrieval multidimensional scaling relevance feedback

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Distribution and replication of object oriented data for friends

Distribution and replication of object oriented data for fri...

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International Conference on Power System Technology (POWERCON 2000)

作者： Trajanov, D Glamocanin, V Dusko, S Stojkovska, B Petar, I Univ St Cyril & Methudius Fac Elect Engn Skopje 91000 Macedonia

ISBN: (纸本)0780363388

By its nature, the power system exists in distributed environment. Therefore the electric power information system has to provide sophisticated methodologies to fulfill this requirements for distribution and replication of data. In this paper we present our experience with the replicated and distributed data base environment, particularly aiming the needs of power distribution system. In our research Oracle database and Oracle Enterprise Manager were used. During this phase, we have focused our research on concepts and basis of distributed database System and replication of data We create test environment in which distribution and replication of simple data, GIS data and Multimedia data is made.

关键词： distributed database replication LAN GIS Oracle ISDN

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