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성기욱,한훈석,김봉선 대한안전경영과학회 2012 대한안전경영과학회 학술대회논문집 Vol.2012 No.04
Since six sigma program was first introduced in late 1990's, it has been evolved in Korea. The number of six sigma adopting company are getting increased and diversify manufacturing, service, government. In these days, the rapid innovation of internet technology change the media industry's game rule. This paper is concerned with a six sigma applications to internet media portal service company. The main focus of this study is to introduce an empirical study on the implementation of DMAIC procedures for internet media portal service company.
자동차용 고장력 강의 진동특성에 미치는 미세조직의 영향
이충도(Choong Do Lee),한훈석(Hun Seok Han),김인동(In Dong Kim) 한국자동차공학회 2005 한국자동차공학회 춘 추계 학술대회 논문집 Vol.2005 No.11_2
In present study, it aims to investigate the vibration characteristics of high strength steel for automobile structural applications, under resonance frequency. The specific damping capacity(SDC) was obtained from logarithmic decayed curve expressed as an index of damping property and the 1st resonance frequency was measure from free-free mode. The elastic modulus could obtain indirectly from measurement of resonance frequency and there is a linear relationship between 1st resonance frequency and elastic modulus. The SDC of steel that has a mixed microstructure of ferrite and bainite is higher than that of ferrite+martensite and ferrite+pearlite structure.
김학성(Hag Seong Kim),이진필(Jin Phil Lee),한훈석(Hoon Suk Han) 한국유화학회 1999 한국응용과학기술학회지 Vol.16 No.1
N/A For a cosmetic plant wastewater containing surfactants of high concentration, adsorption treatment by granular activated carbon(GAC) having different pore size distribution was studied. Three sorts GACs were used and regenerated afterwards with methanol. Experiments were composed of batch process and column test for both virgin and regenerated GACs. Following conclusions were drawn from the study : Methylene blue activating substance(MBAS) adsorption data from the batch tests for three GACs are described well by BET isotherm and Freundich isotherm. Simulation with the BET isotherm shows that maximum adsorption appears to be affected not only by specific surface area but also by pore size distribution. Maximum adsorption from the BET isotherm for MBAS appears to diminish as the number of reactivation increases. The diminshing ratio of maximum adsorption appears to decrease as the pore size methanol ranges from 95% to 97%.