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임기무(K. M. Lim),민병구(B. G. Min),고형종(H. J. Ko),심은보(E. B. Shim) 한국정밀공학회 2004 한국정밀공학회 학술발표대회 논문집 Vol.2004 No.10월
The object of this study is to develop a model of the cardiovascular system capable of simulating the short-term transient and steady-state hemodynamic responses such as hypotention and disequilibrium syndrome during hemodialysis or hemofiltration. The model consists of a closed loop 12 lumped-parameter representation of the cardiovascular circulation connected to set-point models of the arterial and cardiopulmonary baroreflexes and 3 compartmental body fluid and solute kinetic model. The hemodialysis model includes the dynamics of sodium, urea, and potassium in the intracellular and extracellular pools, fluid balance equations for the intracellular, interstitial, and plasma volumes. We have presented the results of many different simulations performed by changing a few model parameters with respect to their basal values.
민병무(B. M. Min),김응모(U. M. Kim) 한국정보과학회 1994 한국정보과학회 학술발표논문집 Vol.21 No.2A
본 논문은 연역 데이타베이스에서 뷰 갱신(view update)에 관한 것이다. 뷰는 추론 규칙에 의해 정의되는 술어로써 뷰 자체는 저장하지 않는다. 저장하지 않는 사실에 갱신을 허용하기 위해서 뷰를 정의하는 사실들의 갱신으로 바꿔주어야 한다. 즉 뷰 갱신을 abduction 체제에서 해결할 것이다. 뷰를 정의하는 규칙이 하나 이상일때 데이타베이스와 일관성이 있고 상태 변화를 최소로 갖는 해결책을 제시하고, abduction에 의한 뷰 갱신시 모호성(ambiguity)과 비 결정성(non-determinism)문제가 발생하는데 이러한 문제점들의 해결 방안을 제시 한다.
고 유량 혈액 투석 시스템에서 박동류 펌프에 대한 대류 향상에 관한 연구
최대석,임기무,이정찬,이사람,문초혜,최혁,민병구,김희찬,Choi, D.S.,Um, K.M.,Lee, J.C.,Lee, S.R.,Mun, C.H.,Choi, H.,Min, B.G.,Kim, H.C. 대한의용생체공학회 2008 의공학회지 Vol.29 No.5
High-flux dialysis treatment removes various toxins via diffusion as well as convection, which is induced by ultrafiltration and backfiltration. In this study, in vitro (Using the distilled water and the bovine's blood) comparison test was performed to determine whether utilization of a high flux dialyzer paired with different pumps would increase the efficiency of convection. At the same blood flow rates, a pulsatile pump and a roller pump were employed to propel the distilled water and bovine whole blood to a high flux dialyzer. Pressures at the dialyzer inlet and outlet in the blood circuit and in the dialysate circuit were measured, respectively. From these data, we calculated the transmembrane pressure and predicted the ultrafiltration and backfiltration rates developed by both pumps. Using the bovine's blood experiment, ultrafiltration and backfiltration rates were 1.6 times higher with the pulsatile pump than with the roller pump. We conclude that utilization of a pulsatile pump in high flux hemodialysis treatments increases ultrafiltration volume, compared with a roller pump under conditions of the same blood flow rate.