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이정만(Jung Man Lee),김미이(Mi-Yi Kim),김동현(Dong Hyun Kim),이종일(Jong Il Lee),김기만(Ki-Man Kim),이영훈(Young Hoon Lee),김승호(Seung Ho Kim),박유석(Yu-Suk Park) 한국산업경영시스템학회 2009 한국산업경영시스템학회지 Vol.32 No.4
The purpose of this research is to find the reasons of overcrowding in the emergency department of an hospital, then to shorten the total stay time of patients The fact that main causes of the overcrowding exist in the process of the emergency department was discovered by analysis of the data In order to Improve these process, simulation model was developed by ARENA 70 Staffs time, staffs organization, process ratio, and patient's waiting time were estimated in the simulation model in consideration of the decision of the patient's course of action Several scenarios such as the simplification of the process, the setup of dedicated pathology lab, and mixed method were suggested and evaluated Total stay time of the patients would be reduced up to 28.45%
박유석,김병재 明知大學校 産業技術硏究所 1995 産業技術硏究所論文集 Vol.14 No.-
Evolution Programs, a form of Genetic Algorithms transformed from chromosome representation, are applied to the Timetabling of university which is one of the NP-hard problems. At the step of algorithms application, each class is established to be a specific category in feasible solution space. At the same time, the exiting gene used in chromosome expression of Evolution Programs is modified to satisfy constraints effectively by transformation of gene which has multi-information. The new crossover method for fester operation in the Recombination are attempted. Roulette wheel selection and tournament selection are prepared.
홍의선,박유석,김병재 明知大學校 産業技術硏究所 2002 産業技術硏究所論文集 Vol.21 No.-
The Traveling Salesman Problem, a kind of sequencing problem, finds the shortest cost and fastest tour of visiting every given city exactly once and returning the starling point. Recently, to improve Genetic Algorithm which is one of methods to solve TSP and to efficiently searching space use convex hull during generating initial tour. In this paper, we adopt convex hullo to generate initial tour and crossover process. The result shows the using convex hull at the GA presents better solutions during same generation and repetition.