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황은주(E. J. Hwang),민경석(K. S. Min),송신형(S. H. Song),최우천(W. C. Choi) 한국정밀공학회 2004 한국정밀공학회 학술발표대회 논문집 Vol.2004 No.10월
Lever mechanisms are usually employed to enlarge output displacement in precision stages. In this study, theoretical analysis of a lever is presented including bending effect and relation between dimension parameters and an objective function. The objective function is chosen as multiplication of magnification ratio and forcedisplacement transmission. Through theoretical analysis, this study presents optimal values for the parameters and the analysis is verified by finite element method.
정팔진,민경석,이찬기 고려대학교 공학기술연구소 1976 고려대학교 생산기술연구소 연구보고 Vol.8 No.1
The water quality of the Han river which has been serving as a major water source for 'the Seoul Metropolitan area is discussed in this paper in terms of D0, BOD and others. The water quality upstream of the Jungryang-chun junction to Paldang was favorable during the investigation period: June 6 to July 27, 1977 with a flow range from 175 to 648㎥/sec. However, DO and BOD values were increased toward the downstream from the Jungryang-chun junction. The water quality downstream of the 2nd Han river bridge could not be simply interpreted due to the tidal effect.