• 한국HCI학회:학술대회논문집
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• 2008.02a
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• pp.309-313
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• 2008

The realization of intelligent services for users is the ultimate goal of ubiquitous computing. The Context-awareness for the realization of intelligent environment organization are important components. Many of the research institution are researching. Therefore, our research introduces about the dynamic environment organization based on context-awareness and the way of providing service for users. Also, our research proposes the community computing platform based on OSGi.

• Proceedings of the Korea Inteligent Information System Society Conference
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• 2004.11a
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• pp.158-161
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• 2004

In this paper, we propose a level of contexts such as low level and high level contexts, and its criteria of categorization are the existence of interaction and composite process done by the inference mechanism. When there is no matching high level service for the associated high level context, this context is described as meaningless. If the services cannot be provided with the entities by the system, this situational information is of little consequence. To provide services with the entities, we propose "community computing" architectural concept which provide the high level service to a group of agents in a community, and can be managed by the service scenario

• Proceedings of the Korean Information Science Society Conference
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• 2007.10d
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• pp.531-535
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• 2007

유비쿼터스 지능 공간(Ubiquitous Smart Space)에서 동적으로 발생하는 다양한 문제를 협업을 통하여 해결할 수 있는 방법론으로 제안된 커뮤니티 컴퓨팅(Community Computing) 모델을 기반으로 하는 개발도구(Community Computing Developing Tool Kit : CDTK)를 사용하면 특정 문제를 해결할 수 있는 커뮤니티 컴퓨팅 어플리케이션이 생성된다. 이 커뮤니티 컴퓨팅 어플리케이션이 실제로 유비쿼터스 지능 공간에 존재하는 uT-entity에 이식되어 동작하기 위해서 uT-entity의 종류에 상관없이 커뮤니티 컴퓨팅 어플리케이션이 배포될 수 있는 환경을 필요로 한다. 본 연구에서는 CDTK를 이용하여 생성된 커뮤니티 컴퓨팅어플리케이션이 uT-entity에 배포되어 각 uT-entity가 커뮤니티의 멤버로 참여하여 멤버간의 협업을 통해 목적을 달성할 수 있도록 지원하는 어플리케이션 프레임워크인 멤버 프레임워크(Member Framework)를 제안한다.

• Journal of KIISE:Computing Practices and Letters
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• v.14 no.7
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• pp.738-742
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• 2008

The user model is an indispensable factor for providing users with personalized. services in the ubiquitous computing environment. In general user models, services which users prefer should be described in advance so that the system can recognize and interpret them automatically. Also, user's preferences as to the change of situation are not reflected in general user models due to their ignoring the situation. In this paper, we propose the self-growing user model which learns user experience and the system which automatically provides personalized community services through extracting user preferring services by situation.

• 한국HCI학회:학술대회논문집
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• 2007.02a
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• pp.802-807
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• 2007

유비쿼터스 컴퓨팅 환경에서 커뮤니티 메타포를 이용하여 유비쿼터스 서비스를 실현하는 커뮤니티 컴퓨팅에 대한 연구가 제안되었다. 제시된 커뮤니티 컴퓨팅 어플리케이션 개발과정은 MDA 개발방법을 적용하여 추상화된 고수준의 모델로부터 최종 플랫폼에 적합한 코드를 생산한다. 그러나 커뮤니티 컴퓨팅 시스템을 구현하기 위한 통합개발환경은 존재하지 않는다. 이에 본 연구에서는 최근 관심이 고조되고 있는 이클립스를 이용하여 커뮤니티 컴퓨팅에서 요구되는 기능들을 플러그인으로 통합하여 커뮤니티 컴퓨팅 어플리케이션 개발에 적합한 통합개발환경(CDTK : Community computing Development Tool Kit)을 제안한다.

• Proceedings of the Korean Society of Broadcast Engineers Conference
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• 2009.01a
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• pp.178-183
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• 2009

Online image dictionary has become more and more popular in concepts cognition. However, for existing online systems, only very few images are manually picked to demonstrate the concepts. Currently, there is very little research found on automatically choosing large scale online images with the help of semantic analysis. In this paper, we propose a novel framework to utilize community-generated online multimedia content to visually illustrate certain concepts. Our proposed framework adapts various techniques, including the correlation analysis, semantic and visual clustering to produce sets of high quality, precise, diverse and representative images to visually translate a given concept. To make the best use of our results, a user interface is deployed, which displays the representative images according the latent semantic coherence. The objective and subjective evaluations show the feasibility and effectiveness of our approach.

• Proceedings of the Korean Information Science Society Conference
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• 2006.06b
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• pp.130-132
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• 2006

커뮤니티 컴퓨팅 (Community Computing)은 유비쿼터스 환경을 하나의 사회(Society)로 보고 이 사회 내에서 특정한 목표(Goal)가 생겼을 경우 이를 달성시키기 위해 커뮤니티(Community)라는 개념을 이용하는 컴퓨팅 방법이다. 커뮤니티 컴퓨팅에서 목표가 발생함에 따라 커뮤니티는 동적으로 생성되며, 한 커뮤니티내에 속하는 구성원(Member)들은 그 커뮤니티의 목표 달성을 위해 상호 작용한다. 기존의 커뮤니티 컴퓨팅 연구에서는 커뮤니티를 생성하고 멤버를 관리하는데 있어 서로 다른 커뮤니티 혹은 멤버 간에 충돌이 발생할 수 있다. 본 논문에서는 커뮤니티 컴퓨팅에서 발생할 수 있는 충돌요인을 제시하고 이의 해결을 위하여 커뮤니티 정책(Community Policy)에 기반한 방법을 제안하였다. 이의 구현 방법론으로 정책 표현을 위하여 많이 사용되는 Ponder 언어를 적용하는 사례를 제시하였다.

• Journal of KIISE:Software and Applications
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• v.33 no.12
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• pp.1031-1051
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• 2006

To develop a ubiquitous system, several researches have been tried to apply multi-agent models to design a system. Even though current multi-agent models provide many benefits with ubiquitous system developments, there are still some deficiencies in completely supporting the characteristics of ubiquitous systems such as dynamic formation and termination of mission-oriented organizations and interrelationship between organizations. In addition, existing agent-based models only concern aboutananalysis and design of a system, then place a burden of implementation on developers. Therefore, in this paper, we propose the high-level abstraction model of a multi-agent based ubiquitous system and the development process concerning implementation as well as design of systems. In addition, we implemented a development toolkit, called as CDTK(Community computing system Development Tool Kit), then developed a small community computing system using the CDTK.

• Communications of the Korean Institute of Information Scientists and Engineers
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• v.24 no.12 s.211
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• pp.84-91
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• 2006

• Journal of Computing Science and Engineering
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• v.6 no.4
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• pp.280-286
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• 2012

The last decades have witnessed an increasingly indispensible role of high performance computing (HPC) in science, business and financial sectors, as well as military and national security areas. To introduce key aspects of HPC to a broader community, an HPC session was organized for the first time ever for the United States and Korea Conference (UKC) during 2012. This paper summarizes four invited talks that each covers scientific HPC applications, large-scale parallel file systems, administration/maintenance of supercomputers, and green technology towards building power efficient supercomputers of the next generation.