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정수압 환경에서 해수흡수된 Carbon-Epoxy 복합재의 기계적 특성
이지훈(Ji Hoon Lee),이경엽(Kyong Yop Rhee),박훈재(Hoon Jae Park),이상목(Sang Mok Lee) 대한기계학회 2004 대한기계학회 춘추학술대회 Vol.2004 No.4
In this study, we investigated compressive characteristics of seawater-absorbed carbon-epoxy composite under hydrostatic pressure environment. The hydrostatic pressures applied were 0.1 ㎫, 100 ㎫, 200 ㎫, and 270 ㎫. The results showed that the compressive elastic modulus increased about 10 % as the hydrostatic pressure increased from 0.1 ㎫ to 200 ㎫. The modulus increased 2.3 % more as the pressure increased to 270 ㎫. Fracture strength and fracture strain increased with pressure in a linear fashion. Fracture strength increased 28 % and fracture strain increased 8.5 % as the hydrostatic pressure increased from 0.1 ㎫ to 270 ㎫.
윤태훈(Tae-Hoon Yoon),박훈재(Hoon-Jae Park),고명윤(Myung-Yun Ko),공기석(Ki-Sok Kong),한경숙(Kyung-Sook Han) 한국정보과학회 2007 한국정보과학회 학술발표논문집 Vol.34 No.2D
기존 모바일 이미지 서비스와 차별화하여 고객이 원하는 기호에 맞춘 이미지를 휴대폰 배경으로 전달하는 서비스이다. 본 논문에서는 휴대폰으로 이미지를 전송해주는 모바일 서버의 구현, SK-VM 기반의 휴대폰에서 구동되는 어플리케이션 구현, MVC패턴을 적용한 JSP 기반의 웹서버의 구축을 기술하였고, 휴대폰 이미지를 관리하는 Tomcat 서버와 고객 정보 데이터베이스 간의 필터링을 방법을 기술하였다.
극저온 볼 밀링을 통한 Ibuprofen 분말의 마이크로화
조현갑(Hyun Kab Cho),이경엽(Kyong Yop Rhee),백영남(Young Nam Paik),박훈재(Hoon Jae Park),이상목(Sang Mok Lee) Korean Society for Precision Engineering 2004 한국정밀공학회지 Vol.21 No.11
For the present study, the cryogenic ball milling process was applied to make Ibuprofen microsized. The cryogenic ball milling was performed at low temperature of about -180℃ for 6 hours. The particle size distribution was determined before and after the cryogenic process. X-ray diffraction (XRD) measurement was made to determine the effect of cryogenic process on the crystallinity of Ibuprofen. The results showed that the size of Ibuprofen was reduced about 10 times by the cryogenic process. The degree of crystallinity of Ibuprofen was slightly reduced by the cryogenic process.