• 정보관리학회지
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• 제13권2호
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• pp.223-242
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• 1996

본 논문에서는 정보검색을 원하는 이용자들에게 시스템 및 DBMS의 이형성, 서로 다른 검색시스템 사용에 관계없이 단일 사용자 인터페이스를 통해 일관성 있는 질의 및 검색결과를 제공할 수 있는 CORBA기반의 정보검색시스템(DDIR/ORB) 통합모델을 제안한다. 본 논문에서 제안한 DDIR/ORB는 질의를 요구한느 클라이언트와 검색을 실행하는 응용서버 사이에 미들웨어베이스와 CD-ROM 텍스트 데이터베이스에 대한 접근 투명성을 보장하고 정보검색 결과에 대한 자유로운 데이터 교환 및 변환을 제공하며, 기존의 정보검색시스템의 재사용을 보장한다. DDIR/ORB 시스템 설계 및 구현에서 OMG IDL을 사용함으로써 인터페이스 복잡도가 감소되었고 구성요소들의 구현 비용을 최소화하였다.

• 한국항해항만학회지
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• 제26권1호
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• pp.78-84
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• 2002

이 본문은 선박중개시스템으로써 분산객체기술을 이용한 CORBA환경하에서 설계되고 구현되었다. 최근 각광 받고 있는 웹에서의 전자상거래 시스템이 방대해 짐에 따라 호스트 중심의 중앙 집중식 방식이 한계를 가지게 되었다. 또한 시스템의 성능 향상도 크게 요구되어졌으며, 이러한 문제들을 해결하기 위해 이종 시스템간에 프로그램을 분산시켜 부하를 줄임으로써 시스템의 성능 저하와 네트워크 병목형상을 해결하고 있다. 본 연구는 에이전트 통신언어(ACL)를 이용하여 분산된 데이터베이스에fi의 에이전트 기반 모형을 제시한다. 또한 분산된 서로 다른 운영체제, 분산된 이종의 데이터베이스에서의 정보 공유와 교환이 가능한 CORBA를 이용한 지능형 선박검색 에이전트의 모형을 구현한다.

• 한국통신학회논문지
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• 제27권12C호
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• pp.1228-1237
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• 2002

통신망 운용관리 시스템의 기능은 크게 구성, 성능, 장애, 과금 및 보안관리로 나뉘어 진다. 이 중에서 구성관리기능은 통신망의 구성정보를 수집하여 사용자 혹은 다른 관리 기능에 제공하는 기반 관리 기능이다. 본 논문에서는 이러한 구성관리 기능을 CORBA (Common Object Request Broker) 분산환경 하에서 구축하는 방안을 제시한다. 본 논문에서 제안하는 계층적 구성관리 시스템은 프로토콜 계층별로 관리객체가 설계 및 구현되어 다양한 데이터링크 계층 전송 기술들을 통합 관리할 수 있다. 또한 분산 MIB/MIT를 통해 다른 관리 기능 모듈과 효율적으로 연동할 수 있으며 확장성이 뛰어나다.

• 한국정보과학회:학술대회논문집
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• 한국정보과학회 2007년도 한국컴퓨터종합학술대회논문집 Vol.34 No.1 (C)
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• pp.336-340
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• 2007

We envisage that grid computing environments allow us to implement distributed data mining services, that is, those applications which analyze large sets of geographically distributed databases and information using the computational power and resources of a grid environment. This paper describes an experimental framework towards such a distributed data mining approach, including design considerations and a prototype implementation. Based on the "Knowledge Grid" architecture suggested by Cannataro et al., we identify four major components - user node, broker node, data node, and computation node - and define their individual roles. For implementing the prototype, we have investigated methods for utilizing distributed resources within a grid computing environment, e.g., communication and coordination among the various resources available.

• 한국디지털정책학회:학술대회논문집
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• 한국디지털정책학회 2004년도 International Conference on Digital Policy & Management
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• pp.247-256
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• 2004

The modern government's role: As an enterprise (To be efficient and effective.); as a service and information provider (government processes that are unique to government). The modern government's role demand interoperation. The Web services architecture is based upon the interactions among three components: Service provider, service broker and service requestor. Service broker is sometimes referred to as service registry. The interactions involve publish, find and bind operations. The paper introduces the concept of web services as a way to realize interoperation between distributed applications. The paper addresses interoperation between e-government and citizen. The motivation of this work was to determine the potentials of the Web services technology for an interoperability infrastructure for e-government. In many countries, the traditional governments have many problems that stem from both insufficient and improper use of ICT. "Insufficient use" refers to the traditional means such as manual archiving systems. "Improper use", on the other hand, refers to the lack of an interoperability infrastructure within and among the government agencies. In this work.

• 대한전자공학회:학술대회논문집
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• 대한전자공학회 2002년도 하계종합학술대회 논문집(3)
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• pp.107-110
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• 2002

A grid computing environment is one in which applications can be built over multiple resource nodes at widespread geographic locations. Grid environments seek to integrate and enable access to widely distributed compute resources. The compute resources in a grid environment are typically heterogeneous, with varying qualify and availability Hence, how computations are allocated to individual resources is extremely important in the design of a grid. This paper j\ulcorners concerned with resource management for metacomputing. We describe a resource management architecture using the two-level resource broker.

• ETRI Journal
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• 제26권1호
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• pp.27-37
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• 2004

The architecture in a differentiated services (DiffServ) network is based on a simple model that applies a per-class service in the core node of the network. However, because the network behavior is simple, the network structure and provisioning is complicated. If a service provider wants dynamic provisioning or a better bandwidth guarantee, the differentiated services network must use a signaling protocol with QoS parameters or an admission control method. Unfortunately, these methods increase the complexity. To overcome the problems with complexity, we investigated scalable dynamic provisioning for admission control in DiffServ networks. We propose a new scalable $qDPM^2$ mechanism based on a centralized bandwidth broker and distributed measurement-based admission control and movable boundary bandwidth management to support heterogeneous QoS requirements in DiffServ networks.

• 한국전자거래학회지
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• 제7권2호
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• pp.143-156
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• 2002

The objective of supply chain planning is to satisfy the requirements for minimizing inventory costs, transportation costs, and lead times throughout the supply, production and distribution stage dispersed geographically. Therefore, the supply chain planning system should have functionalities to resolve complex optimization problems that have characteristics of multi-stage and multi-product. Ant the system should also support collaborative decision making among distributed business partners. In this study, we proposed a distributed architecture for the supply chain planning system. To do this, we analyzed functional requirements by using IDEF-0(ICAM Definition-0) methodology, defined required components, and designed each component by using object-oriented methodology. We implemented a prototype system based on CORBA (Common Object Request Broker Architecture) to show that the proposed distributed architecture based on component technology is feasible and can solve supply chain planning problem collaboratively.

• 한국국방경영분석학회지
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• 제23권2호
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• pp.25-44
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• 1997

Internet users been rapidly increased due to the convenient GUI environment. Current Web-based HTTP/CGI client/server architecture has several problems such as the CGI bottleneck, no maintaince of state, and no load balancing. However, with Java and CORBA technologies called“Object Web technology”, we can solve them because Java is not only a mobile code but also a platform-independent code, and CORBA has ability to build distributed object and language-independent object model. The goal of “Object Web technology”is to create multivendor, multiOS, multilanguage“legoware”using objects. This paper implement“Book Search System”which is Web-based client/server architecture using distributed objects. Environments of this implementation are Hangul Windows NT(included IIS) server, Hangul Windows 95 client, Visigenic's VisiBroker for Java 1.2 which is a product of CORBA 2.0, HTTP protocol on TCP-IP-based, Sybase SQL Anywhere 5.0 database server, and the interface between application server and database is JDBC-ODBC bridge middleware.

• 산업공학
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• 제15권1호
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• pp.10-19
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• 2002

New trends such as electronic commerce, virtual organizations, e-business applications, etc. increase the dependence of production management on information software systems and contribute to the needs for global, distributed object systems. This paper presents a component based approach for production management systems under the multi-tier distributed information system architecture using UML(Unified Modeling Language), CORBA(Common Object Request Broker Architecture) and XML(eXtensible Markup Language) technologies, and propose rules for mapping a UML class diagram to a XML DTD (Document Type Definition). And we adapt it to the prototype system implementation. The components are implemented by CORBA and we use XML messages for the information exchange between components.