• 지식경영연구
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• 제9권4호
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• pp.17-33
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• 2008

This study proposes University 2.0 as a model case of open, flexible, and distributed learning environment for higher education based on theoretical foundations and perspectives. As web 2.0 technologies emerge into the field of education, ways of generating and disseminating information and knowledge have been drastically changed. Professors are no longer the only source of knowledge. Students using internet often become prosumers of knowledge who search and access information through the web as well as publish their own knowledge using the web. A concept and framework of University 2.0 is introduced for implementing the new interactive learning paradigm with an open, flexible and distributed learning environment for higher education. University 2.0 incorporates online and offline learning environments with various educational media. Furthermore, it employs various learning strategies and integrates formal and informal learning through learning communities. Both instructors and students in University 2.0 environment are expected to be active knowledge generators as well as creative designers of their own learning and teaching.

• 한국시뮬레이션학회:학술대회논문집
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• 한국시뮬레이션학회 2005년도 추계학술대회 및 정기총회
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• pp.65-70
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• 2005

Recently, Grid is embossed as a new issue according to the need of cooperation related to distributed resources, data sharing, Interaction and so on. It focuses on sharing of large scale resources, high-performance, applications of new paradigms, which improved more than established distributed computing. Because of the environmental specificity distributed geographically and dynamic, the most important problem in grid environment is to share and to allocate distributed grid resources. This paper proposes supply-driven strategies model that is applicable for resource management in grid environment and presents a optimal resource allocation algorithm based on resource demands. Supply-driven strategies model can offer efficient resource management by transaction allocation based on user demand and provider strategy. This paper implements the supply-driven strategies model on the DEVS modeling and simulation environment and shows the efficiency and excellency of this model by comparing with established models.

• 한국멀티미디어학회논문지
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• 제9권4호
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• pp.490-504
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• 2006

분산 환경에서 멀티미디어 라이브 스트리밍을 지원하는 멀티미디어 서비스를 구현하기 위해서는 다양한 플랫폼에 분산되어 있는 객체들을 제어하고, 멀티캐스트를 지원하지 않는 네트워크 환경에서 다수의 수신자에게 멀티미디어를 전송하는 것이 필요하다. 본 논문에서는 분산 객체 기술인 RMI와 멀티미디어 전송/처리에 사용하는 JMF를 확장하여 분산 환경에서 1:N 의 멀티미디어 라이브 스트리밍을 지원하는 DLS (Distributed Live Streaming) 패키지를 제안한다. 효율적인 분산 처리를 위해 전송과 제어를 분리하여 설계한 자바 기반의 DLS 패키지는 1:N의 전송을 지원하고 플랫폼 독립적인 멀티미디어 서비스의 개발에 적용이 가능하다.

• Journal of information and communication convergence engineering
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• 제8권5호
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• pp.473-478
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• 2010

Today's engineering design is carried out in a distributed fashion geographically or physically. This places new requirements on the computational environments such as efficient integration and collaboration. With the advances of the Internet and Network environment recently, many researches have been proposed and at the same time, Web-based distributed design gives to a new paradigm in design and manufacturing fields. That is, Web-based technologies lead to reduce the product development times and to ensure a competitive product in order to exchange and interact of real-time design information that integrates the distributed design environment between departments as well as companies via Internet and Web. So, an efficient data communication for design information sharing is the foundation for collaborative systems in the distributed environment. Design data communication techniques such as CORBA, DCOM and RMI have been considered in the existing research but they have some problems that are limitations of interoperability and firewall problems in the Web. Therefore, this paper presents a Web-based distributed design application where distributed design information resources are integrated and exchanged using Web Services for supporting XML and HTTP without the interoperability and firewall problems through the 330K VLCC case.

• 디지털콘텐츠학회 논문지
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• 제9권2호
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• pp.277-284
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• 2008

인터넷 서비스가 일반화되고 복잡해지면서 차세대 인터넷 서비스인 시맨틱웹의 중요한 구성요소로 활발히 연구되고 있는 분야가 온톨로지이다. 현재까지의 많은 연구들은 중앙 집중형 사이트에서의 온톨로지 구축을 통한 데이터의 통합에 관한 연구가 대부분이었다. 그러나 인터넷 환경은 기본적으로 분산 데이터 환경이며, 이러한 분산된 사이트의 모든 데이터를 대상으로 질의를 처리해야 한다. 이때 사이트간의 온톨로지 분산 데이터 처리에 대한 해결 기법들이 없이는 빠른 변화에 대응할 수 있는 차세대 시맨틱웹 구축을 기대할 수 없다. 본 연구는 분산된 인터넷 환경에서 각기 다른 방법으로 구축되어 있는 온톨로지간의 관계를 OWL언어가 지니는 확장요소를 이용하여 온톨로지 요소간의 분산관계를 기술하여 통합 질의 처리가 가능한 시스템을 구축하는 방법을 제시한다.

• 인터넷정보학회논문지
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• 제2권1호
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• pp.13-21
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• 2001

본 논문에서는 인터넷상에 연결된 유휴자원을 이용한 분산 웹 환경에서 각 시스템 상에 저장된 지식을 공유·재이용 하기 위한 온톨로지 다중화 연구를 수행한다. 온톨로지의 다중화란 동일지식에 의하여 구축된 온톨로지를 다른 온톨로지와 지식공유가 가능하도록 변환하는 것이다. 본 연구에서는 이러한 분산웹 온톨로지 다중화 시스템을 구성하기 위하여 분산웹 환경구축방안과 함께 지식의 공유 및 재 이용을 위한 다중 온톨로지 구성이라는 두 가지 관점 하에서 접근한다. 구성된 시스템은 지니기술을 이용하여 이기종간의 확장성과 효율성을 지닌 웹 컴퓨팅환경을 구축하였고, 또한 분산작업을 통하여 분산 웹 환경 하에서의 다중 온톨로지간의 실질적인 지식변환과정이 잘 전개됨을 볼 수 있다.

• 한국정밀공학회:학술대회논문집
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• 한국정밀공학회 1995년도 추계학술대회 논문집
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• pp.885-888
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• 1995

Virtual Manufacturing System(VMS) is a computer model that represents the precise and whole structure of manufacturing system and simulates their physical and logical behavior in operation. In this paper, a real time simulation for the virtual factory is proposed to integrate a process planning with scheduling under distributed environments. In order to communicate the information under distributed environment, weuse a sever/client concept and socket program. the VMS is implemented on the internet environment.

• International Journal of Naval Architecture and Ocean Engineering
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• 제4권3호
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• pp.211-227
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• 2012

To implement a combined discrete event and discrete time simulation such as submarine diving simulation in a distributed environment, e.g., in the High Level Architecture (HLA)/Run-Time Infrastructure (RTI), a HLA interface, which can easily connect combined models with the HLA/RTI, was developed in this study. To verify the function and performance of the HLA interface, it was applied to the submarine dive scenario in a distributed environment, and the distributed simulation shows the same results as the stand-alone simulation. Finally, by adding a visualization model to the simulation and by editing this model, we can confirm that the HLA interface can provide user-friendly functions such as adding new model and editing a model.

• 대한전기학회:학술대회논문집
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• 대한전기학회 2005년도 심포지엄 논문집 정보 및 제어부문
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• pp.230-232
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• 2005

This paper proposes a Distributed Transaction models based on the multimedia framework (MPEG-21) in digital convergence environment. Digital media market is growing up rapidly according to the extension of internet and universality of multimedia contents. So, importance of the effective management with the production and distribution of produced multimedia contents is becoming larger. For effective management of multimedia contents, the multimedia contents which are represented with different standard each other can be processed adaptively in the variable network environment. A free compatibility among the different terminals and standards are the essential particular should be offered for the digital convergence environment. A multimedia framework supports this compatibility and various multimedia services. In this paper, the Distributed Transaction models that multimedia contents can be circulated among the individual users safely and freely are proposed and the relation technologies are described.

• 한국정보처리학회논문지
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• 제6권10호
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• pp.2618-2629
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• 1999

In this paper, we describe the design and implementation of the FDRA(Fault Detection Recovery based on Agent) running on distributed multimedia environment. DOORAE is a good example for distributed multimedia and multimedia distance education system among students and teachers during lecture. It has primitive service agents. Service functions are implemented with objected oriented concept. FDRA is a multi-agent system. It has been environment, intelligent agents interact with each other, either collaboratively or non-collaboratively, to achieve their goals. The main idea is to detect an error by using polling method. This system detects an error by polling periodically the process with relation to session. And, it is to classify the type of error s automatically by using learning rules. The merit of this system is to use the same method to recovery it as it creates a session. FDRA is a system that is able to detect an error, to classify an error type, and to recover automatically a software error based on distributed multimedia environment.