• Title/Summary/Keyword: multi database system

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Session Management of a Web Client in Multi-Database Middleware System MDATA (다중 데이터베이스 미들웨어 시스템 MDATA에서의 웹 클라이언트 세션 관리)

  • 서정민;홍영국;진은숙;윤수영;송주원
    • Proceedings of the Korean Information Science Society Conference
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    • 2000.10a
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    • pp.160-162
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    • 2000
  • 데이터베이스 응용 시스템간에 공유되는 자료가 많아지고 웹 응용 시스템이 일반화됨에 따라서, 웹 상에서도 이기종 데이터베이스 시스템들에 접근하여 질의를 처리하는 방법이 요구되고 있다. 이에 본 논문에서는 이기종 데이터베이스의 자료를 쉽게 처리하는 다중 이기종 데이터베이스 미들웨어 시스템을 웹 환경에서 사용하게 하기 위한 웹 클라이언트를 제안하고, 이 웹 클라이언트가 다수의 전역 데이터베이스에 접근할수 있도록 여러사용자에 대한 세션을 관리하는 방법을 제안한다.

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Design of a MultiDatabase Management System Based on Jini (Jini 기반 멀티 데이터베이스 관리 시스템의 설계)

  • 박제성;황부현
    • Proceedings of the Korean Information Science Society Conference
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    • 2000.04b
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    • pp.178-180
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    • 2000
  • 분산되어 있는 이질형 데이터베이스 시스템들의 자율성을 보장하고, 효율적으로 정보를 공유 및 교환하기 위한 멀티 데이터베이스 시스템에 대한 연구가 진행되고 있다. 그러나 기존의 멀티 데이터베이스 시스템은 새로운 데이터베이스를 추가하거나 제거하는 경우, 관리 시스템을 정적으로 재구성해야 한다는 문제점이 있다. 본 논문에서는 지니 기술을 기반으로 멀티 데이터베이스 관리 시스템 모델을 제안하였다. 제안하는 모델은 지니 기술의 Plug&Work 개념을 이용하여 네트워크에 연결된 데이터베이스 시스템들의 연결 변화를 동적으로 감지함으로써, 기존의 멀티 데이터베이스 시스템의 문제점을 제거할 수 있다. 또한 본 논문에서 제안하는 멀티 데이터베이스 관리 시스템은 지역 tm키마를 동적으로 통합함으로써 전역 스키마를 관리한다.

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Development of Multiple Wireless Communication Controller for Smart Factory Construction (스마트팩토리 구축을 위한 다중 무선통신 컨트롤러 개발)

  • Oh, Jae-Jun;Choi, Seong-Ju;Kim, Jin-Sa
    • Journal of the Korean Institute of Electrical and Electronic Material Engineers
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    • v.30 no.9
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    • pp.602-608
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    • 2017
  • Due to recent industry 4.0, manufacturing has changed a lot. In particular, it is necessary to control the controller and controller of the control system, to communicate various production information and measurement information, and to produce a database in accordance with the flexible production for a small quantity of various items, and to manage the trend of major parts of production facilities. In this paper, we developed a multiple wireless communication controller for small scale control system for smart factory by applying XBee and microcomputer. This controller is cheap and easy to build multi-radio communication environment of 1: N and can control and monitor control system. In addition, we tested multiple wireless communication controllers by using signal processing device and C++, and constructed network, control, and database for mechanism module, and confirmed effectiveness for industrial application.

Development of System Architecture and Method to Reprocess Data for Web Service of Educational Power Flow Program (교육용 전력조류계산 프로그램의 웹 서비스를 위한 시스템 구성 및 데이터 재가공 방법론 개발)

  • 양광민;이기송;박종배;신중린
    • The Transactions of the Korean Institute of Electrical Engineers A
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    • v.53 no.6
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    • pp.324-333
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    • 2004
  • This paper discusses the development of an educational web-based power flow program for undergraduate students. The interaction between lectures and users can be much enhanced via the web-based programs which result in the student's learning effectiveness on the power flow problem. However the difficulties for developing web-based application programs are that there can be the numerous unspecified users to access the application programs. To overcome the aforementioned multi-users problem and to develope the educational web-based power flow program, we have revised the system architecture, the modeling of application programs, and database which efficiently and effectively manages the complex data sets related to the power flow analysis program. The developed application program is composed of the physical three tiers where the middle tier is logically divided into two kinds of application programs. The divided application programs are interconnected by using the Web-service based on XML (Extended Markup Technology) and HTTP (Hyper Text Transfer Protocol) which make it possible the distributed computing technology Also, this paper describes the method of database modeling to handle effectively when the numerous users change the parameters of the power system to compare the results of the base case.

New Data Model for Efficient Search and Reusability of XML Documents (XML 문서의 효율적인 검색과 재사용성을 지원하는 데이터 모델)

  • Kim Eun-Young;Chun Se-Hak
    • Journal of Intelligence and Information Systems
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    • v.10 no.3
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    • pp.27-37
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    • 2004
  • XML has been proposed as a document standard for the representation and exchange of data on the WWW, and also becoming a standard for the search and reuse of scattered documents. When implementing a XML contents management system, special consideration should be imposed on how to model data and how to store the modelled data for effective and efficient management of the semi-structured data. In this paper, we proposed a new data model for the storage and search of XML document data. This proposed data model could represent both of data and structure views of XML documents, and be applied to the new data system for XML documents as well as the existing data systems.

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Applied Systems Engineering Process to Test and Evaluation Technical Development of (Korea) Express Tilting Train System (시스템 엔지니어링 프로세스를 적용한 한국형 속도향상 틸팅 열차 시스템의 시험 및 평가 기술 개발)

  • Shin Kwang-Bok;Jang Jae-Deuck
    • Proceedings of the KSR Conference
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    • 2003.05a
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    • pp.519-524
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    • 2003
  • Systems engineering test and evaluation technology development program for (Korea) Express Tilting Train(TTX) system in progress is a national large system development program that is not only a large-size and complex but also multi-disciplinary in nature. For the TTX test and evaluation technology development, verification requirements that could verify system function and performance, should be derived from system specification. Hereafter, this could be listed as items of test. System engineering process establish traceability between items of test and system requirements. These tasks could be accomplished by the schema. Using the Core, a system engineering tool, TTX program could be database and similar other system could be developed effectively and efficiency

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Decision Support System for the Water Supply System in Fukuoka, Japan

    • Proceedings of the Korea Water Resources Association Conference
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    • 2001.05a
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    • pp.15-24
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    • 2001
  • This study introduces an integrated decision support system (DSS) for the water supply system in Fukuoka City, Japan. The objective is to conceive a comprehensive tool that may aid decision-makers to derive the best water supply alternatives from a multi-reservoir system in order to minimize the long-term drought damages and threat of water shortage. The present DSS consists of graphical user interface (GUI), a database manager, and mathematical models for runoff analysis, water demand forecasting, and reservoir operation. The methodology applied explicitly integrates the drought risk assessment based on the concept of reliability, resiliency, and vulnerability, as constraints to derive the management operation. The application of the DSS to the existing water supply system in Fukuoka City was found to be an efficient tool to facilitate the examination of a sequence of water supply scenarios toward an improved performance of the actual water supply system during periods of drought.

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Study on Designing and Implementing Online Customer Analysis System based on Relational and Multi-dimensional Model (관계형 다차원모델에 기반한 온라인 고객리뷰 분석시스템의 설계 및 구현)

  • Kim, Keun-Hyung;Song, Wang-Chul
    • The Journal of the Korea Contents Association
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    • v.12 no.4
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    • pp.76-85
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    • 2012
  • Through opinion mining, we can analyze the degree of positive or negative sentiments that customers feel about important entities or attributes in online customer reviews. But, the limit of the opinion mining techniques is to provide only simple functions in analyzing the reviews. In this paper, we proposed novel techniques that can analyze the online customer reviews multi-dimensionally. The novel technique is to modify the existing OLAP techniques so that they can be applied to text data. The novel technique, that is, multi-dimensional analytic model consists of noun, adjective and document axes which are converted into four relational tables in relational database. The multi-dimensional analysis model would be new framework which can converge the existing opinion mining, information summarization and clustering algorithms. In this paper, we implemented the multi-dimensional analysis model and algorithms. we recognized that the system would enable us to analyze the online customer reviews more complexly.

Design and Implementation of the Active Multi-Agent Middleware for the Sensor Network Application (센서 네트워크 응용을 위한 능동적 다중 에이전트 미들웨어 설계 및 구현)

  • Lee, Yon-Sik;Jang, Min-Seok
    • The KIPS Transactions:PartA
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    • v.18A no.4
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    • pp.159-164
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    • 2011
  • In this paper, we suggest the active multi-agent middleware for the sensor network application. For this, firstly we design and implement the active rule based mobile agent middleware. The mobile agent in the proposed system visits the destination sensor nodes according to the migration list offered by the meta table in the name space of the naming agent, acquires and transmits sensor data according to the purpose and needs through the active rules, and directly executes the actions corresponding to the optional events(changed sensor data and/or time etc.). And then, we show the potential applicability of the active rule based mobile agent middleware in various active sensor networks through the interaction with the rule base system and context database system.

An Efficient Hybrid Lighting Management System Implementation on Multi Protocol (다중 프로토콜 기반의 효율적인 하이브리드 조명관리 시스템 구현)

  • Hong, Sung-Il;Lin, Chi-Ho
    • Journal of IKEEE
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    • v.17 no.4
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    • pp.550-558
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    • 2013
  • In this paper, we propose an efficient hybrid lighting management system implementation on multiple protocol. The proposed hybrid lighting management system was implemented by configured as the data display part for management and control of lighting device and the data conversion-processing part the communication part of gateway. The data were designed the DB to enable to storage in real-time, and implemented able to manage by real time wireless remote control and schedule setting. The proposed an efficient hybrid lighting management system, it was possible the real-time monitoring and remote lighting control by peristalsis with smart devices and portable PC etc., and it could be obtained reduction effect of energy and electricity, communication cost.