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TFT - LCD 공장의 제조 기준정보 자동 산출 시스템 구축 사례
정인재(In-Jae Jeong),이영수(Young-Su Lee) 한국산업경영시스템학회 2005 한국산업경영시스템학회지 Vol.28 No.1
In this paper, we propose a systematic procedure to determine standard time and cycle time in a TFT-LCD factory. The proposed procedure mainly consists of data preprocessing, hypothesis testing and Group technology. Data preprocessing extracts relevant data from large on-line data sets by eliminating corrupt and noisy data. Hypothesis test techniques have been used to determine whether the standard information has been changed. Also, Group technology has been applied to generate standard information for newly developed products. The proposed procedure has been successfully applied to the production information system of a TFT-LCD factory in Korea.
기계 가용성 제약을 고려한 흐름공정 상황하에서 Makespan을 최소화하기 위한 향상된 유전 알고리듬
이경화(Kyung-Hwa Lee),정인재(In-Jae Jeong) 한국산업경영시스템학회 2007 한국산업경영시스템학회지 Vol.30 No.1
In this paper, we study flowshop scheduling problems with availability constraints. In such problems, n jobs have to be scheduled on m machines sequentially under assumption that the machines are unavailable during some periods of planning horizon. The objective of the problem is to find a non-permutation schedule which minimizes the makespan. As a solution procedure, we propose an improved genetic algorithm which utilizes a look-ahead schedule generator to find good solutions in a reasonable time. Computational experiments show that the proposed genetic algorithm outperforms the existing genetic algorithm.
ㄷ자형 초등학교의 비상구를 중심으로 한 정량적 배치방법
이승선,권준범,정인재,Lee, Seung-Sun,Kwun, Joon-Bum,Jeong, In-Jae 한국교육시설학회 2011 敎育施設 Vol.18 No.5
This study examined emergency exit location with the most representing school floor type with a mathematical model that applied optimized algorithm in the field of engineering. Recent school buildings became much more diverse in floor planning than the old days. Nevertheless, architect's approach to building prevention against fire related emergency planning still relies on an personal experience and knowledge. Therefore, since school buildings are much more likely to be exposed to any fire related events, emergency exit planning has to be seriously evaluated with a scientific method. The algorithm, which acquires the number of persons in each spatial type(node) and the minimum physical distance between spatial types(arc), can propose the most optimized emergency exit locations. Consequently, this study compared an architect's fire exit planning with the scientific outcome of this study and suggested the most reliable emergency exit locations.
텍스트마이닝을 활용한 국외 노인작업치료의 연구동향 분석
김아람(Kim, Ah-Ram),이태권(Lee, Tae kwon),정인재(Jeong, In Jae),박혜연(Park, Hae Yean) 대한신경계작업치료학회 2021 재활치료과학 Vol.10 No.1
목적( : 본 연구는 텍스트마이닝을 활용하여 국외 노인 작업치료의 양적 변화와 현황 파악을 정량적으로 분석하고자 하였다. 연구 방법 : 2009~2019년까지 PubMed를 활용하여 Elderly, Health, Occupational therapy가 들어간 제목과 초록이 존재하는 연구논문을 분석대상으로 선정하여 초록의 단어들을 수집하였다. 수집된 정보를 통해 연도별 발생 논문 편수, 핵심어 분석, 연도별 핵심어 분석, 단어들 간의 관계성을 분석하였다. 결과 : 2009-2019년에 발표된 논문은 9,941편이며, 2009년부터 점차적으로 증가하여 2017년 또는 2018년에 최다 빈도를 보인 후 2019년에 감소하는 추이를 보였다. 최근 5년간 빈도수가 많은 단어는 Care, Group, Intervention, Pain, Treatment, Work이었다. 최근 11년간 평균적인 빈도수를 기준으로 단어 간의 관계성을 파악한 결과, Function, Health, Intervention, Participation이 단어들 간의 높은 관계성을 보였다. 결론 : 본 연구는 텍스트마이닝이라는 새로운 연구방법을 적용하여 작업치료의 동향을 실증적, 체계적으로 분석하여 거시적이고 종합적인 결과를 제시했다는 점에 의의가 있다. 이를 토대로 노인과 관련된 작업치료 임상 및 연구 현장에서 새로운 연구방향을 설정하는데 도움이 될 것으로 기대한다. Objective : The purpose of this study was to quantitatively analyze the quantitative changes in, and the status of, overseas occupational therapy using text mining. Methods : Using PubMed, research papers on Elderly, Health and Occupational therapy published between 2009 and 2019 were selected for analysis, Abstracts of the selected papers were analyzed. The number of annual papers, the key words, the key words by year, and the relationship between the words were analyzed. Results : The number of papers published from 2009 to 2019 was 9,941, there was a gradual increase from 2009 to the highest in 2017 or 2018, followed by a decreasing trend in 2019. Within the last five years, the most frequent words were Care, Group, Intervention, Pain, Treatment, and Work. There was a strong relationship between the words based on the average frequency over the last 11 years, function, health, event, and partition. Conclusion : This study is meaningful because it applied a new research method called text mining to the empirical and systematic analysis of trends in occupational therapy and presented macroscopic and comprehensive results. The findings are expected to help establish new research directions at clinical and research sites for occupational therapy related to older adults.