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홍순찬(S.C.Hong),강경우(K.W.Kang),정우창(W.C.Jung),황용하(Y.H.Hwang) 전력전자학회 2003 전력전자학술대회 논문집 Vol.2003 No.7(1)
This paper deals with the development of IGBT stacks for cost reduction One stack is consist of 4 IGBTs in parallel. In the high- and mid-power converters, IGBT stacks are more suitable than single IGBTs in the aspects of total cost of semiconductor devices, time for purchasing, maintenance, radiation of heat, size of surge absorber and harmonic filter, frequency characteristics, and etc Problems accompanied by parallel construction are studied and solved Economical efficiency is discussed and field tests with rooky A UPS are carried out to verify the validity of the developed IGBT stacks.
손진욱(J W Sohn),전시영(S Y Jeon),이종석(J S Lee),한호성(H S Han),홍순찬(S C Hong),정영균(Y K Chung) 한국의학교육학회 1990 Korean journal of medical education Vol.2 No.2
The course objective of comprehensive clerkship for senior students is to achieve the ability of actual patient care at their postgraduate practice situations. But there has been a great difficulty in implementation of the course mainly due to the lack of manpower, facilities, understanding objective, and measures for evaluation. So the ad hoc committee engaged in the planning, management, evaluation, and integration of the whole course in 1990 academic year and obtained good results. This is the report of the experiences of the committee.
간세포암 환자에서 Indocyanine Green 청소율과 기저 간의 염증과 섬유화 정도 간의 관계
박성준(Seong-Jun Park),문형곤(Hyeong-Gon Moon),김동출(Dong Chul Kim),정치영(Chi-Young Jeong),주영태(Young-Tae Ju),정은정(Eun-Jung Jung),이영준(Young-Joon Lee),최상경(Sang-Kyung Choi),하우송(Woo-Song Ha),박순태(Soon-Tae Park),홍순찬(S 대한외과학회 2008 Annals of Surgical Treatment and Research(ASRT) Vol.74 No.4
Purpose: The indocyanine clearance rate has been identified as an independent prognostic factor in patients with hepatocellular carcinoma (HCC). However, in contrast to its well-documented value in measuring hepatic reserve function, the mechanism by which it exerts its prognostic effect is not precisely understood. Methods: We analyzed the clinical and pathological data, including preoperative ICG-R 15 and survival, of 80 patients with resectable HCC. The correlation between ICG-R15 and the degree of inflammation and fibrosis in non-cancerous liver tissue were investigated. The prognostic significance of ICG- R15 was also investigated in 67 patients with unresectable HCC who received transarterial chemoembolization. Results: In patients with resectable HCC, the low ICG group (ICG-R15<15%) showed an increased overall survival rate (P<0.001) and disease-free survival rate (P<0.01) compared to the high ICG group (ICG-R15≥15%). ICG-R15 was also a significant prognostic factor in the multivariate analysis. ICG-R15 showed a significant correlation with the degree of necroinflammation (P<0.001) and the degree of fibrosis (P<0.001). In patients with unresectable HCC, the low ICG group (ICG-R15<30%) showed a significantly increased progression-free survival rate (P=0.037). Conclusion: The results of the present study demonstrate that the ICG clearance rate can predict the degree of inflammation and fibrosis of non-cancerous hepatic parenchyma, and this capacity may explain the prognostic value of the ICG clearance rate in HCC patients.