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단일 및 이중명령을 수행하는 자동창고 시스템의 성능분석
남진규,정재호,허선 한국경영과학회 2003 한국경영과학회 학술대회논문집 Vol.- No.1(1)
We consider an AS/RS(Automated Storage/Retrieval System) which performs single and dual commands. In this paper, we also assume that the service times of single and dual commands are differently distributed. We transform the arrival rates of storage and retrieval commands into those of single and dual commands. Using this, we propose a non-preemptive queueing model with priority for the performance analysis of a AS/RS, and obtain approximated means of queue lengths and sojourn times.
상황인지 컴퓨팅 환경에서 복합서비스를 제공하는 서비스시스템의 성능분석
남진규,허선,주국선,신동민 대한산업공학회 2008 대한산업공학회 추계학술대회논문집 Vol.2008 No.11
There are a variety of users and devices m a context-aware computing environment. In this environment, the service provided to a user may be the composition of diverse services rather than one independent service. Before user"s devices provide the composite service to the user, they should perceive user"s needs by gathering related information segments from other surrounding devices and/or sensors. We consider a context-aware computing environment providing composite and adapted service to users and propose an information processing model that characterizes the device where the collected data should be processed through services and/or aDplications. Based on this model, we provide an analytical tool to obtain some performance measures of the context-aware computing environment.
유비쿼터스 환경에서 커뮤니티 컴퓨팅 지원을 위한 코디네이터 개발
남진규(Jingyu Nam),김현우(Hyunwoo Kim),신동민(Dongmin Shin),박재일(Jaeil Park),허선(Sun Hur) 한국산업경영시스템학회 2008 한국산업경영시스템학회지 Vol.31 No.3
Recent advances in mobile computing technologies and platform-independent information systems have enabled to realize a ubiquitous environment. Community computing has been developed as a useful tool for realizing collaborative services in a ubiquitous environment. In this paper, we present a formal model of a ubiquitous space that takes community concept into consideration and propose two management frameworks that prevent conflicts among communities. To demonstrate the validity of the proposed frameworks, an example for coordinating two communities is provided.
단일 및 이중명령을 수행하는 자동창고 시스템의 성능분석
남진규(Jin-Gyu Nam),허선(Hur Sun),정석윤(Seok-Yun Jeong),김정기(Jeong-Kee Kim) 한국산업경영시스템학회 2004 한국산업경영시스템학회지 Vol.27 No.3
We consider an AS/RS(Automated Storage/ Retrieval System) which performs both of single and dual commands. The service times of single and dual commands are assumed to be differently distributed. Steady-state probabilities at the service completion epochs are calculated. Then, we transform the arrival rates of storage and retrieval commands into those of single and dual commands. Using this, we propose a non-preemptive queueing model with priority for the performance analysis of an AS/RS, and obtain approximated means of queue lengths and waiting times.