• 한국공간정보시스템학회:학술대회논문집
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• 2005.05a
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• pp.67-71
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• 2005

• Proceedings of the Korean Association of Geographic Inforamtion Studies Conference
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• 1998.11a
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• pp.54-58
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• 1998

• Proceedings of the CALSEC Conference
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• 1997.11a
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• pp.127-132
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• 1997

본 논문의 연구방향은 객체지향방법론을 이용하여 PDM에서의 워크플로우를 재설계하는 것이다. 기존의 방법론들은 워크플로우 엔진과 작업자 사이의 흐름에 중점을 두었으나 본 논문에서는 프로세스와 작업에 중점을 두고 이를 각각의 객체로 설계하는 방안을 연구하고자 한다. 시스템의 설계를 위하여 Rumbaugh의 OMT(Object Modeling Technique) 방법론을 기본모델링 방법론으로 사용한다. 연구내용은 object model을 통한 정적 구조 설계, dynamic model을 이용한 시간에 따른 동적 구조 설계, 그리고 functional model에서의 데이터의 전이 및 시스템간의 연계의 설계이다. 특히 object model에서의 작업설계 및 dynamic model에서의 상태변화에 중점을 두고 DCOM(Distributed Component Object Model)을 사용하여 작업(task)을 중심으로 한 분산환경을 구현한다.

• Korean Management Science Review
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• v.14 no.2
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• pp.113-137
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• 1997

Intranet emerges as a key technology for building enterprise information system. This paper proposes a scenario-based object- oriented technique for designing intranet hypermedia information systems. The method consists of six phases such as domain analysis, object modeling, view design, navigational design, implementation design and construction. Users requirements are analyzed in the form of scenarios by the use fo a responsibility-driven object technology. Object-oriented views are generated from the resulting object model and then used for the subsequent navigational and implementation design. Implementation design phase deals integrating enterprise databases with distributed hypermedia systems by employing Java language. To demonstrate its usefulness, a real-life bank case is illustrated.

• Proceedings of the Korean Information Science Society Conference
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• 1998.10b
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• pp.315-317
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• 1998

대규모 분산 데이터베이스 시스템을 구축하는데 있어 CORBA와 DBMS의 연동은 필수적이다. 특히 개방 분산 환경에서 기존 시스템 통합시 관계형 데이터베이스의 접근 문제를 해결해야 한다. 본 논문에서는 ORB 컴포넌트중의 하나인 BOA(Basic Object Adapter)를 확장하여 관계형 데이터베이스의 연동을 지원하는 관계 데이터베이스용 객체 어댑터(Relational Object Data base Adapter: RODA)의 구현과 이를 이용한 응용 개발에 관한 내용을 기술한다. 객체-관계 사상은 Tie 방식과 객체 포장기(Object Wrapper)를 사용하여 CORBA 객체와 튜플을 일대일 대응시켰다. RODA 는 CORBA 지속성 객체의 생성, 데이터베이스 객체의 생성, 지속성 객체의 해지 등과 같은 ODA(Object Data base Adapter)가 가지는 주요 기능 뿐 아니라 관계형 데이터베이스의 객체 포장 기능을 제공한다. 이를 통해 개발자 측면에서는 RODA클래스 라이브러리를 이용하여 소프트웨어 개발 생산성을 향상시킬 수 있고, 분산 응용에서 객체지향적 DB통합시 사용자에게 단일한 정보 처리 인터페이스를 제공하는 요소 기술로 활용할 수 있다.

• The Transactions of the Korea Information Processing Society
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• v.3 no.7
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• pp.1697-1706
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• 1996

This paper presents the design and the implementation of a MissCW(Multi user Interactive System for Synchronous Collaborative Writing). The document model DMDA(Distributed Multimedia Document Architecture) of MissCW consists of the logical structure, presentation style object, and mark object. The windows. The collaborative editor of this system proposes a structure oriented editing mechanism to combine distrbuted objects into one document. The middleware SOM(Shared Object Manager) maintains shared objects consistently and helps application programs use objects efficiently. The infrastructure of this system is a hybrid structure of replicated and centralized architectures, that is to maintain shared objects consistently inside of SOM and to reduce the overhead of network traffic. The central part is a virtual node which corresponds to the Object Controller of SOMwith the SOT(Shared Objet Table).

• Journal of KIISE:Computing Practices and Letters
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• v.7 no.6
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• pp.630-640
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• 2001

In this paper, we describe the design and implementation of ObjectPeerWork, which is a framework for the development of shared object model-based P2P(Peer-to-Peer) applications. The shared object model can prevent the computing power decrease on the way of resource management by incorporating the resource management function into resources themselves, and raise reliability on shared resources by improving the security problems. Also this model assures expandability by means of distributed component-based request broker manager and module container. The ObjectPeerWork based on this shared object model is a framework which makes the implementation of the enterprise information system possible, and makes distribution of the computing power and efficient resource management possible by improving the weakness in the general P2P model.

• Proceedings of the Korea Society for Industrial Systems Conference
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• 2007.02a
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• pp.131-138
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• 2007

Distributed Group Decision Support System (GDSS) is in the stage between exploration and implementation, there is not unified constructing model. As computer software and hardware, network technique develop, especially the development of object-oriented programming, distributed process, and artificial intelligence, this makes it possible the practical and valid implementation of distributed GDSS. With a view of emphasizing and solving process-supporting, this article discusses how to use the key technologies of network, distributed process, artificial intelligence and man-machine mutual interface, to implement more adaptable, more flexible, and more valid GDSS than before.

• Journal of Korean Society of Industrial and Systems Engineering
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• v.18 no.36
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• pp.143-152
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• 1995

This paper determines the allocation of computers and data files to minimize the sum of processing and communication costs which occur in processing jobs at each node. The problem of optimally configuring a distributed computer system belongs to the class of NP-Complete problems and the object function of this paper is nonlinear function and is hard to solve. This paper seeks the solution of distributed processing system by Tabu Search. Firstly, it presents the method of generating the starting solution proper to the distributed processing system. Secondly, it develops the method of searching neighborhood solutions. Finally, it determines the Tabu restriction appropriate to the distributed processing system. According to the experimental results, this algorithm solves a sized problems in reasonable time and is effective in the convergence of the solution. The algorithm developed in this paper is also applicable to the general allocation problems of the distributed processing system.

• The KIPS Transactions:PartD
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• v.13D no.6 s.109
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• pp.847-856
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• 2006

In this paper, we suggested a mobile collaboration framework for supporting mobile services among mobile devices, and designed and implemented on this environment. The suggested framework has three elements; groups of sensors and mobile devices(Fixed and Moving-typed PDAs) and a home server. We designed interfaces for interactions with each other in collaboration environment with three elements described above. The information collected by sensors can be share and exchanged by mobile devices or a home server in accordance with Push and Pull methods. This framework is based on the distributed object group framework(DOGF) we implemented before. Therefore the DOGF provides functions of object group management, storing information and security services to our mobile collaboration framework via application interfaces defined. The information collected by sensors is arranged according to user's security 'demands. And user profile information is used for checking authority of each service object. Each component for executing functions of mobile devices and a home server is implemented by TMO scheme. And we used the TMOSM for interactions between distributed components. Finally, we showed via GUI the executablity of a given healthcare application scenario on our mobile collaboration framework.