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권영일(Kwon, Young Il) 한국신뢰성학회 2013 신뢰성응용연구 Vol.13 No.1
A Bayesian zero-failure reliability demonstration test method for products with exponential lifetime distribution is presented. Beta prior distribution for reliability of a product is used to design the Bayesian test plan and selecting a prior distribution using a prior test information is discussed. A test procedure with zero-failure acceptance criterion is developed that guarantees specified reliability of a product with given confidence level. An example is provided to illustrate the use of the developed Bayesian reliability demonstration test method.
가속열화시험에 의한 콘크리트용 탄소섬유 강화플라스틱 바의 사용수명 예측
권영일(Young Il Kwon),김승진(Seung Jin Kim),이형욱(Hyoung Wook Lee) 한국신뢰성학회 2009 신뢰성응용연구 Vol.9 No.2
This paper discusses the service life prediction methods for CFRP bar for concrete reinforcement using accelerated degradation tests. The relationship between performance degradation and the rate of a failure-causing chemical reaction is assumed for the temperature accelerated degradation tests. Methods of obtaining acceleration factors and predicting service life of the CFRP bar using the degradation model are presented.
Hitachi 736-40 과 7600-110 모델의 풀혈청을 이용한 정밀도 비교와 정상범위 데이터의 분산 비교
권영일 ( Young Il Kwon ),노명희 ( Myung Hee Rho ),박찬호 ( Chan Ho Park ) 대한임상검사과학회 1999 대한임상검사과학회지(KJCLS) Vol.31 No.2
The new Hitachi 7600-110 is clinical chemistIy ana1yzer of module combinated analyzer(D-moduel: mu1ti-sample analyses, P-module: multi-item ana1yses, Ion selective electrodes). In the present paper, we compared the precision of Hitachi 736-40 and 7600-110 with pooled serum and the dispersion of data in normal ranges. The coefficients of variation(CVs) for pooled serum of Hitachi 736-40 and 7600-110 were : for AST , 4.28 and 3.87%; for ALT , 10.71 and 7.33%; for A1k. phosphatase, 2.73 and 3.23%; for T. protein, 1. 94 and 2.74%; for r -GT, 13.40 and 3.87%; for T. bilirubin, 6.94 and 7.76%; for glucose, 1. 76 and 2.4 1%; for BUN , 3.15 and 2.50%; for creatinine, 2.64 and 2.94%; for triglyceride, 3.36 and 2.72%; for tota1 cholesterol, 1.85; and 2.56% and for T. ca1 cium 1. 70 and 2.77, respectively. The determined data between the Hitachi 736-40 and 7600-110 were significantly defferent at P ≤0.05 except for triglyceride and T. cholesterol.The dispersion of norma1 groups for monthly average were 4.02 -4 7.4 4%(CVs) with Hitachi 736-40 and 4.17-49.38%(CVs) with Hitachi 7600-110.