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한상하(S. H. Han),이희중(H. J. Lee),조형권(H. G. Cho),김재선(J. S. Kim),장병우(B. W. Jang),변태섭(T. S. Byeun),신진웅(J. W. Shin),노덕영(D. Y. Ro),신종철(J. C. Shin),김도강(D. K. Kim),김수평(S. P. Kim) 대한산부인과학회 1999 Obstetrics & Gynecology Science Vol.42 No.11
Objective: The purpose of this study was to evaluate the course of Systemic Lupus Erythematosus through hematologic change during pregnancy and the outcome of pregnancy in patients with SLE. Method: This retrospective study was done by the review of medical records of 25 pregnancies complicated with SLE in patients betwen Jan, 1989 and Dec, 1997. Results: The common laboratory hematologic change in SLE with pregnant woman was elevated WBC count during peripartum period(P<0.05), significantly decreased during postpartum(P<0.05). And, during peripartum period ESR change was significantly elevated (P<0.05) but not obtained data during postpartum period. The serum level of C3 complement and C4 complement were not significantlty changed during peripartum and postpartum. So these factors are not affected by gestational condition. SLE pregnant woman's kidney function was relatively maintained during peripartum and postpartum according to BUN/Cr levels. Among 25 cases of SLE pregnant woman, there was 1 case of midtrimester termination due to spontaneous premature rupture of membranes (4 %), 5 cases of preterm birth (20 %), other were term delivery was done (19 cases, 76 %). Conclusion: Our data suggest that the risk of pregnancy with SLE is not harmful to pregnant woman, especially hematologic indicies and not to bad in pregnant outcome of newborn baby in our cases.
다층 신경회로망 기법을 이용한 하이드로포밍 공정의 성형압력곡선추정
현봉섭(B.S.Hyun),김재선(J.S.Kim),조형석(H.S.Cho) 대한전자공학회 1992 대한전자공학회 학술대회 Vol.1992 No.10
For hydroforming process, determination of back-up fluid pressure in chamber is one of the most essential tasks. In this paper, we present a back-up pressure estimation system which estimates the back-up pressure of hydroforming process utilizing a multi-layered neural network, The neural network learns the nonlinear relation ship between the back-up pressure and the geometric state variables of hydroforming process. The proposed method does not necessitate sophisticated analysis on hydroforming process but some geometric intuition. The experimental results show that the nueral network well approximates the nonlinear relationship between the back-up pressure and the geometric state variables of hydroforming process, thus giving the good estimation of bac-up pressure vs punch stroke curve.