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오상우(S.W. Oh),최혁진(H.J. Choi),김진민(J.M. Kim) 한국해양환경·에너지학회 2009 한국해양환경·에너지학회 학술대회논문집 Vol.2009 No.11월
본 연구는 수중 유연관의 변형 정도를 광섬유 마이크로벤드 센서를 이용하여 측정하는 방법에 관한 것으로, 연구를 통해 새롭게 설계한 광섬유 마이크로벤드 센서를 이용하여 수중 유연관의 굽힘의 정도를 감소된 광신호 크기를 통해 해석한 실험결과를 제시한다. 제안된 마이크로벤드 센서는 기존의 센서와는 다르게 단일 구조로 유연관의 양방향 굽힘에 대해 동일한 크기의 마이크로벤드 손실을 광섬유에 발생시킬 수 있는 장점을 갖고 있어, 여러 방향으로 굽힘 변형이 일어날 수 있는 수중 유연관으로의 적용에 효율적이다. This research is about the measuring technique of underwater tube's bending degree and presents an experimental result performed by novel designed fiber optic microbend sensor. Through the experiment, it was found that the optical power loss increased as the bending degree of tube increased. Because the suggested sensor can generate same level of microbend effect at the both directional bend of underwater tube, it is efficient to be applied to the underwater tube which tends to be multidirectionally bended.
강원석(W S Kang),최창수(C S Choi),주상언(S A Joo),박충기(C K Park),김진민(J M Kim),임규성(K S Lim) 대한소화기학회 1986 대한소화기학회지 Vol.18 No.2
Caroli's disease is characterized by congenital, segmental, saccular dilatations of the intrahepatic bile ducts. There are two types; the one type is only intrahepatic saccular dilation, the another is combined with Choledochal cyst, Congenital hepatic fibrosis, Medullary sponge kidney, or pancreatic cyst. This syndrome is rare and presents at any age, but usually in childhood or early adult life. Clinical manifestations are usually RUQ pain, and fever, chilling when combined with cholangitis. Here we are reporting a case of Caroli's disease diagnosed by ultrasonogram, abdominal computed tomography and percutaneous transhepatic cholangiogram. A brief review of the literature was attempted.
3 % Si 강판에서 Normalizing 이 냉간압연 및 재결정에 미치는 영향
한봉희,박준철,김진민 대한금속재료학회(대한금속학회) 1984 대한금속·재료학회지 Vol.22 No.6
The effect of normalizing of commercial 3% single grain oriented Si steel on the cold rolling and secondary recrystallization have been studied by observation of microstructured texture coefficient. The variables of normalizing are temperature, holding time and cooling rate. As the temperature of normalizing is raised, texture coefficients of (200) and (222) increased in the second cold rolling and that of (110) was very strong in the secondary recrystallization. The optimum conditions for normalizing treatment are thought to be 950℃ 3 min, and air cooling.