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이달의과학자-품질관리 전문가시스템 연구 고려대 산업공학과 김성인 교수
김성인,Kim, Seong-In 한국과학기술단체총연합회 1995 과학과 기술 Vol.28 No.2
무한경쟁속 치열한 경쟁에서 이기고 생산성을 높이기 위해서 품질관리의 중요성이 강조되고 있는 가운데 최근 품질관리 전문가시스템에 관한 연구논문을 발표해 주목을 끌고 있는 김성인 교수를 만나보았다.
노즐 압력비와 충돌면까지의 거리 변화에 따른 초음속 충돌 제트 유동의 진동 특성
김성인(S. I. Kim),박승오(S. O. Park),이광섭(K. S. Lee) 한국전산유체공학회 2004 한국전산유체공학회 학술대회논문집 Vol.2004 No.-
Numerical simulations of supersonic impinging jet flows are carried out using the axisymmetric Navier-Stokes code. This paper focuses on the oscillatory flow features associated with the variation of the nozzle pressure ratio and nozzle-ta-plate distance. Frequencies of the surface pressure oscillation from computational results are in accord with the measured impinging tones for various cases of nozzle-ta-plate distance. The variation of this frequency with distance show a staging behavior. Computed results for the case of nozzle pressure ratio variation for a fixed nozzle-to-plate distance also demonstrate a staging behavior. These two seemingly different staging behaviors are found to obey the same frequency-distance characteristics when the frequency and the distance are normalized by using the length of the shock cell.
간환자의 혈청 HBsAg 검사 결과와 간조직의 Orcein 염색결과 비교 연구
김성인 김천대학교 1999 김천대학교 논문집 Vol.20 No.-
The purpose of this study is to show that the staining mechanism and specificity of Orcein stain for HBsAg in human liver tissue. The results of Orcein stain in 128 cases of liver needle biopsy tissue were compared with the results of serum HBV releated antigen and antibodies. Using anti-HBsAg mouse IgG, immunohistochemical stain were prepared and the results were used for demonstration of presence of HBsAg in liver cells. The experiments yielded the following results: 1. Hepatitis were 63.3% of total liver diseases and 85.9% of liver disease were involved with the hepatitis B virus. 2. The positive rate of Orcein stain was 56.8% of serum HBsAg positive cases, but all serum HBsAg negative cases were obtained negative results of Orcein stain. It may be suggested that Orecin stain has a very high specificity for HBsAg. 3. There were 10~20% negative result of immunohistochemical stain although serum HBsAg tests were positive. 4. It was suggested that HBsAg titer was main element of Orcein stain. Because first group with HBsAg high toter were showed all positive results of Orcein and immunohistochemical stain.