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혈액투석중인 만성신부전 환자의 사망률에 영향을 미치는 요인부석
김경석(K . S . Kim),김진구(J . G . Kim),우상태(S . T . Woo),서상렬(S . Y . Suh),김향(H . Kim),권영주(Y . J . Kwon),표희정(H . J . Pyo),김용섭(Y . S . Kim),차대룡(D . R . Cha),조원용(W . Y . Jo),김형규(H . K . Kim),김창수(C . S . Kim),박 대한내과학회 1998 대한내과학회지 Vol.54 No.3
Background: Several factors have been influenced to mortality of patients with end-stage renal disease treated with hemodialysis. We performed this study to evaluate the factors influencing to mortality in chronic hemodialysis patients in eight hemodialysis centers. Method: We analyzed retrospectively the demographic characteristics, risk stratification, Kamofsky scale, regularly tested laboratory finding(CBC, Blood chemistry), hospitalization rate, and gross mortality among 150 patients from June, 1994 to June 1996. Results: 1) A total of 150 patients were enrolled, male 91 and female 59 and mean age was about 53 years. 43 patients had diabetes and 107 patients had nondiabetes. The mean duration of hemodialysis was 48.2±24.7 months(range, 9-123months), 2) 82 patients(54.7%) required hospitalization during the 2 year follow-up period and the most common cause of hospitalization was cardiovascular disease. 3) A total of 43 patients(28.7%) had been died during the 2 year follow-up period and the most common cause of death was cerebrovascular disease. 4) In univariate analysis, advancing age, Kamofsky scale(<80 points), diabetic nephropathy as the underlying cause of ESRD, comorbid illness, high risk group in risk stratification, total HD duration, HD length per week, low serum albumin and creatitine concentration were all associated with significantly increased risk of death. In multivariate analysis, diabetic nephropathy as the underlying cause of ESRD and low serum albumin concentration were more highly associated with death probability. Conclusion: We conclude that diabetic nephropathy as underlying cause of ESRD and serum albumin concentration are more important elements in determining patient mortality.
자전거 시뮬레이터를 이용한 평형감각 증진의 정량적 분석
정성환(S. H. Jeong),정우석(W. S. Chong),김경석(K. S. Kim),권대규(T. K. Kwon),홍철운(C. U. Hong),김남균(N. G. Kim) 한국정밀공학회 2004 한국정밀공학회 학술발표대회 논문집 Vol.2004 No.10월
This paper describes the quantitative analysis on the improvement of equilibrium sensory using virtual bicycle system. We have used a virtual bicycle system that combines virtual reality technology with a bicycle. In this experiment, 10 subjects were tested to investigate the influencing factors on equilibrium sensory. Straight road and curved road driving at several factors including cycling time, number of times of path deviation, and center of pressure(COP) were extracted and evaluated to quantify the extent of control. Also, To improve the effect of balance training, we investigated the usefulness of virtual feedback information by weight shift. The result showed that the system could be effective for equilibrium sensory rehabilitation training device. The analysis method might also have wider applicability to the rehabilitation field.
ESPI와 Pulse ESPI를 이용한 모형교량의 거동해석
최정구(J.G. Choi),김경석(K.S. Kim),김성식(S.S. Kim),정성욱(S.U. Jeong) 한국생산제조학회 2005 한국생산제조시스템학회 학술발표대회 논문집 Vol.2005 No.10
At present strain gage technique and accelerometer are used widely for the diagnosis safety of constructions. However, the limits of these methods are revealed. But ESPI(Electronic Speckle Pattern Interferometry) and Pulse ESPI is noncontact, whole-field, real-time measuring method. Especially Pulse ESPI method is insensitive to disturbance and can achieve test result in a very short time. It has various strong points in spot application, swift establishment, and dynamic conduct analysis for the entire field of Laser illumination. In this paper a new approach for safety diagnosis on bridges based on speckle interferometry techniques is presented.
ESPI와 Pulse ESPI를 이용한 모형교량의 거동해석
최정구(J.G. Choi),김경석(K.S. Kim),김성식(S.S. Kim),정성욱(S.U. Jeong) 한국생산제조학회 2005 한국공작기계학회 추계학술대회논문집 Vol.2005 No.-
At present strain gage technique and accelerometer are used widely for the diagnosis safety of constructions. However, the limits of these methods are revealed. But ESPI(Electronic Speckle Pattern Interferometry) and Pulse ESPI is noncontact, whole-field, real-time measuring method. Especially Pulse ESPI method is insensitive to disturbance and can achieve test result in a very short time. It has various strong points in spot application, swift establishment, and dynamic conduct analysis for the entire field of Laser illumination. In this paper a new approach for safety diagnosis on bridges based on speckle interferometry techniques is presented.