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Markov Process에 의한 시스템의 신뢰도 해석
임덕빈,이대기,Im, Deok-Bin,Lee, Dae-Gi 한국전자통신연구원 1983 전자통신 Vol.5 No.1
복잡한 시스템의 신뢰도를 해석하기 위해서는 가용도 (Availability) 및 각종 고장간격 등의parameter를 계산하여야 한다. 따라서 이들 parameter를 정의하고 이의 적용성에 대하여 언급하였으며, Markov process를 적용하여 각종 고장간격을 계산하는 기법을 유도하였다. 본 Markov process에 의한 신뢰도 해석기법은 제반 시스템의 상태확률을 계산하여 각종parameter를 구하게 되므로 다양한 시스템의 상태를 해석할 수 있으며, 시스템의 신뢰도 예측은 물론 정비계획을 수행하는 데에도 광범위하게 응용할 수 있다. When analyzing a complex system with repair environments, it is necessary to calculate such parameters as availability and various kinds of failure time measures. These measures are defined and methods of calculating them using Markov process are presented. Analyzing the various system states, numerical values of the reliability measures can be obtained by calculating the state probabilities. And these techniques are widely applied to reliability prediction and also to maintenance strategy.
실리움 응용처방이 高콜레스테롤 흰쥐의 체중 및 혈중 지질 함량에 미치는 영향
任德彬,李暎鍾 대한본초학회 2001 大韓本草學會誌 Vol.16 No.1
Psyllium husk, which is the seed of Plantago psyllium L., Plantago arenaria Waldst. and Kit., or plantago ovata Forsk., belongs to Plantaginaceae family. Because it is absortive and contains much mucous components, it is frequently consumed as a mild laxative for obesity, constipation, diarrhea, cystitis and the other symptoms in the western countries. To prove clinical utility, the herbal compounds of psyllium husk(containing psyllium husk, Polygoni Multiflori Radix, Visci Ramulus, and Polygonati Rhizoma) have been dosed to the rats caused obesity by high cholesterol diet. The results are as follows. 1. The herbal compounds of psyllium husk dosed to obese rats are useful for the inhibition of weight gain and the decrease of dietary intake. 2. The herbal compounds of psyllium husk dosed to obese rats show a slight decrease of fecal lipid levels(but without statistical significance). 3. The herbal compounds of psyllium husk dosed to obese rats decrease serum total cholesterol levels. 4. The herbal compounds of psyllium husk dosed to obese rats show a slight decrease of serum triglyceride levels(but without statistical significance). 5. The herbal compounds of psyllium husk show no changes to serum HDL cholesterol levels. These results suggest that the herbal compounds of psyllium husk could be useful for the inhibition of appetite and the decrease of serum cholesterol levels.