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예외적 요소와 셀간 이동거리를 최소화할 수 있는 셀 형성과 셀 배치결정 모형
윤창원,정병희 한국경영과학회 1996 한국경영과학회 학술대회논문집 Vol.- No.1
In general, cellular manufacturing system can be constructed by the following two steps. The first step forms machine cells and part families, and the result of first step. Cell layout has to be considered when cell is formed because the result of cell formation affects it. This paper presents a cell formation algorithm and proposes an integrated mathematical model for cell formation and cell layout. The cell formation algorithm minimizes the number of exceptional element in cellular manufacturing system. New concept for similarity and incapability is introduced, based on machine-operation incidence matrix and partoperation incidence matrix. One is similarity between the machines, the other is similarity between preliminary machine cells and machines. The incapability identifies relations between machine cells and parts. In this procedure, only parts without an exceptional element are assigned to machine cell. Bottleneck parts are considered with cell layout design in an integrated mathematical model. The integrated mathematical model determines cell layout and assigns bottleneck parts to minimize the number of exceptional element and intercell moving distance, based on linearized 0-1 integer programming. The proposed algorithm is illustrated by using numerical examples.
An Eurpium(III) Hydrolytic Catalyst Favoring Anionic Phosphate Esters over Phosphate Triester'
윤창원,오순진,전영진,최영서,손윤경,황보석,구자강,박준원,Yun, Chang Won,O, Sun Jin,Jeon, Yeong Jin,Choe, Yeong Seo,Son, Yun Gyeong,HwangBo, Seok,Gu, Ja Gang,Park, Jun Won Korean Chemical Society 2001 Bulletin of the Korean Chemical Society Vol.22 No.2
A Cryptate (221) having a short alcohol pendant (2) was metallated with europium(Ⅲ) in anhydrous condition, and its hydrolytic activity for phosphate esters at neutral pH was examined. While the activity for the phosphate diester and monoester is comparable to that of the parent metal complex [1Eu]3+, its hydrolytic activity towards a phosphate triester is significantly suppressed. Potentiometric titration and luminescence spectroscopic studies for the equilibrium behavior of the complex in solution suggest that a dimer formation through the metal hydroxides as well as the pendant alcohol is likely to happen. The low hydrolytic activity for the triester seems to be associated with the dimer formation.
윤창원,Yun, Chang-Won 한국과학기술단체총연합회 1997 과학과 기술 Vol.30 No.6
과학기술이 지향하는 결과가 삶의 질을 높이는 것이라면 일반대중 앞에 다가가야한다. 연구활동도 이제부터는 연구원들끼리 폐쇄된 연구실에서보다는 일반대중과 함께 열린공간에서 이뤄져야 한다. 과학기술활동이 국민과 함께 이뤄지면 과학기술계의 최진실, 과학기술계의 박찬호가 탄생될 것이다.