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실시간 디스크 입출력 scheduling의 구현에 관한 연구
이정배(J B Lee),김해진(H J Kim),임기욱(K.W. Rim),박용진(Y J Park) 한국정보과학회 1988 한국정보과학회 학술발표논문집 Vol.15 No.1
본 논문에서는 디스크 입출력의 부담이 많은 실시간 시스팀 환경에서 실시간 프로세스에게 디스크 입출력 시 다른 일반 시분할 프로세스들 보다 빠른 디스크 입출력을 제공하여 실시간내에 처리될 수 있도록 하기 위하여 실시간 UNIX운영체제내에 실시간 디스크 입출력 scheduling 방식을 구현하고 시험하였다.
진동특성 및 물성을 고려한 치과용 스케일러 분말사출성형기술개발
고영배(Y.B. Ko),황철진(C.J. Hwang),김종선(J.S. Kim),정성택(S.T. Chung),권영삼(Y.S. Kwon),이정배(J.B. Lee) 대한기계학회 2006 대한기계학회 춘추학술대회 Vol.2006 No.11
Powder injection molding(PIM) is widely used for many parts in the field of automotives, electronics and medical industries, due to the capability of net shaping for complex 3-D geometry. Powder injection mold design for the dental scaler tip, a component of medical appliance, was presented. In comparison with conventional machining process, powder injection molding has many advantages, specially in price and dimensional stability, for molding dental scaler tip which has complex geometry. Both product design and mold design for dental scaler tip were presented. The rapid mold concept was applied to manufacture the various forms and materials of dental scaler tip including vibration characteristics.
Rancho Seco Transient에 대한 고리 1호기 원자로용기의 건전성 평가
정명조,박윤원,이정배,Jhung, M.J,Park, Y.W,Lee, J.B 대한기계학회 1997 大韓機械學會論文集A Vol.21 No.7
In this paper, Rancho Seco transient which is reported as a typical pressurized thermal shock event is postulated to be occuring in the Kori unit 1 plant, the oldest nuclear power plant in Korea. For the given material properties, transient history such as temperature and pressure, and postulated flaw, the stress distribution is obtained to calculate stress intensities for a wide range of assumed crack sizes. The stress intensities are compared with the fracture toughness, which is determined using the material properties and the distribution of the nil ductility transition temperature, to determine if cracking is expected to occur during the transient. The allowable operating year for the transient is determined and the evaluation results are discussed.