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이중호(Joung-Ho Lee),서성기(Sungki Seo),장진혁(Jin Hyuck Chang),백승진(Seung-Jin Baek),석상호(Sang Ho Seok) 한국자동차공학회 2014 한국자동차공학회 부문종합 학술대회 Vol.2014 No.5
Wind tunnel tests using a moving-belt system were carried out to reduce drag around the wheel of vehicle. The wheel air curtain and aero wheel reduced the drag by up to 11 drag counts. The Kiel probe array was used to visualize the flow around wheels. The results showed that wake around wheels was significantly weakened by wheel air curtain and aero wheels.
윈드쉴드 경사각에 따른 와이퍼 소음과 환기량 예측 및 개선
전승(Jeon, Seung),이명한(Lee, Myunghan),서성기(Seo, Sungki),신준식(Shin, Junsik) 한국자동차공학회 2010 한국자동차공학회 학술대회 및 전시회 Vol.2010 No.11
In the present study, we predict and enhance the ventilation and wind noise from wiper. For this purpose, we change the angle between windshield glass and hood. Also we change the height of the exposed cowl top cover. We vary the angle between windshield glass and hood from 155o to 164 o. The height of the cowl top cover is varied from 0 to 10㎜. The ventilation and wiper rush noise are in inverse proportion of the angle. In the case of the exposed cowl top cover, the ventilation is proportion to the height of the cowl top cover, but wiper rush noise is the smallest at 4㎜.
아시아티코사이드로부터 메칠 2beta, 3beta-에폭시-23-히드록시우르스-12-엔-28-오애이트의 합성 및 이의 환원적 에폭시환 개열반응
주상섭(Sang Sup Jew)임두연(Doo Yeon Lim),서성기(Sung Ki Seo),남태규(Tae Gyu Nam),박형근(Hyeung Geun Park),김희두(Hee Doo Kim),김창민(Chang Min Kim),이민희(Min Hee Lee),백형근(Hyeung Geun Paik),이민정(Min Jung Lee),정영훈(Young Hoon J 대한약학회 1998 약학회지 Vol.42 No.5
Steroidal 2beta, 3beta-epoxy compound was prepared from asiaticoside via six steps and reduced regioselectively with lithium aluminum hydride. Epoxide ring opening furnished 9 as a sole product at reflux condition through axial hydride attack at C-3.
아시아티코사이드로부터 메칠 2β, 3β-에폭시-23-히드록시우르스-12-엔-28-오애이트의 합성 및 이의 환원적 에폭시환 개열반응
주상섭,임두연,서성기,남태규,박형근,김희두,김창민,이민희,백형근,이민정,정영훈 성균관대학교 약학연구소 1998 成均藥硏論文集 Vol.10 No.1
Steroidal 2β, 3β-epoxy compound was prepared from asiaticoside via six steps and reduced regioselectively with lithium aluminum hydride. Epoxide ring opening furnished 9 as a sole product at reflux condition through axial hydride attack at C-3.