• Journal of the Korean Institute of Intelligent Systems
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• v.18 no.2
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• pp.175-182
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• 2008

Context-aware service environment should provide many kinds of services according to users' requests. Users want a great variety of services. In response to their demands the service provider should make a new service every time. But making a new service every time may be inefficient even for a small number of users' requests. So, there are studies on how to efficiently support various and complex requests fFom users. In many researches, service compositions have lately attracted considerable attention. However, existing researches have mainly focused on Web services. So they are not proper to rapidly providing services in response to users' requests, especially In context-aware service environment. This paper proposes a rapid service composition using case-based reasoning. For evaluating the proposed algorithm we implement 'purchasing seTvice agent'. With this system, we compare our algorithm and the existing service composition algorithms.

• Annual Conference of KIPS
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• 2005.05a
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• pp.517-520
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• 2005

사용자가 현존하는 하나의 웹 서비스로는 요구사항들을 만족시켜줄 수 있는 기능이 없을 때, 그러한 요구를 만족시키기 위해 몇 개의 서비스들을 결합해야 하는 문제가 최근에 큰 이슈로 부각되고 있다. 본 논문에서는 비즈니스 분야에서 성공적으로 활용되고 있는 워크플로우 기법을 적용하여 웹 서비스 조합을 구현한다. 워크플로우의 웹 서비스 적용은 아직까지는 새로운 분야로써 다음과 같은 두 가지 문제 해결을 요구한다. (1) 인터넷상에 흩어져 있는 수많은 웹 서비스들 중에서 어떻게 원하는 서비스를 효율적으로 탐색할 수 있는가, (2) 탐색된 다양한 이기종 웹 서비스들 간의 상호운용성 극대화 문제에 관한 해결이 필요하다. 본 연구에서는 (1)을 수행하기 위해 웹 서비스 매칭 알고리즘이 제안되고, (2)를 해결하기 위해 매칭 알고리즘에 온톨로지 개념이 적용된다.

• Corrugated packaging logistics
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• no.53 s.11
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• pp.98-98
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• 2004

• Corrugated packaging logistics
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• no.49 s.10
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• pp.111-118
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• 2003

• 월간 기계설비
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• no.6 s.191
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• pp.90-91
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• 2006

대한설비건설공제조합 관리자반 교육실시/ 메트로이더넷(Metro Ethernet) 서비스도입

• Corrugated packaging logistics
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• no.61
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• pp.28-35
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• 2005

• Corrugated packaging logistics
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• v.7 no.34
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• pp.152-161
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• 2000

• Journal of KIISE:Software and Applications
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• v.35 no.2
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• pp.91-104
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• 2008

Service-Oriented Computing (SOC) is the development method that published services are selected and composed at runtime to deliver the expected functionality to service clients. SOC should get maximum benefits not only supporting business agility but also reducing the development time. Services are selected and composed at runtime to improve the benefits. However, current programming language, SOC platforms, business process modeling language, and tools support either manual selection or static binding of published services. There is a limitation on reconfiguring and redeploying the business process to deliver the expected services to each client. Therefore, dynamic selection is needed for composing appropriate services to service clients in a quick and flexible manner. In this paper, we propose Dynamic Selection Handler (DSH) on ESB. we present a design method of Dynamic Selection Handler which consists of four components; Invocation Listener, Service Selector, Service Binder and Interface Transformer. We apply appropriate design patterns for each component to maximize reusability of components. Finally, we describe a case study that shows the feasibility of DSH on ESB.

• Proceedings of the Korea Society for Simulation Conference
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• 2005.05a
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• pp.50-55
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• 2005

웹 서비스와 웹 프로세스(Web Processes)는 다양한 시스템 상에서 이종의 소프트웨어 컴포넌트들을 효과적으로 통합할 수 있는 기술이다. 웹 서비스의 활용이 증대함에 따라 성능(performance), 비용(cost) 등 005(Quality of Service)는 서비스 제공자들 간의 차별화를 위한 요건으로 그 중요성이 증가하고 있다. 본 논문에서는 웹 서비스 성능 분석 도구인 sPAC(Web Service Performance Analysis Center)을 소개하여, 웹 서비스 조합시 성능의 만족 여부를 미리 고려할 수 있음을 보인다. sPAC은 1) 그래픽 기반 웹 프로세스 구성 환경을 제공, 2) 경부하(light load) 조건에서의 성능 테스트를 위해 웹 서비스를 호출, 3) 웹 프로세스에 대한 시뮬레이션 모델을 자동 생성 하여, 과부하(heavy load) 조건에서 시뮬레이션 기반의 성능 분석 수행, 4) 웹 서비스의 성능 분석 결과와 평가 데이터의 보고서 생성을 제공한다.

• Journal of Intelligence and Information Systems
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• v.16 no.3
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• pp.15-35
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• 2010

Web service Technology has been developing rapidly as it provides a flexible application-to-application interaction mechanism. Several ongoing research efforts focus on various aspects of Web service technology, including the modeling, specification, discovery, composition and verification of Web services. The approaches advocated are often conflicting-based as they are differing expectations on the current status of Web services as well as differing models of their future evolution. One way of deciding the relative relevance of the various research directions is to look at their applicability to the currently available Web services. To this end, we conducted a survey on currently publicly available Web service repositories. Our aim is to get an idea of the number, complexity and composability of these Web services and see if this analysis provides useful information about the near-term fruitful research directions.