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김대수,이효숙,한규진 대한금속재료학회(대한금속학회) 1981 대한금속·재료학회지 Vol.19 No.6
Alkaline leaching of an uranium containing coaly shale in Okchon Series was investigated under the various oxygen partial pressure and different alkaline concentrations. The relationship between oxygen partial pressure, P, and uranium leachability, X, was determined as follows: X=kP^(0.34), X=kp^(0.11) for carbonate and carbonate-bicarbonate solutions, respectively, where k is an overall rate constant. As the carbonate concentration increased the leachability of uranium increased up to 80 %. With the mixture of carbonate-bicarbonate solutions higher leachability was obtained.
인트라넷에서 멀티미디어 생방송 서비스를 제공하기 위한 효율적인 멀티캐스트 알고리즘
김대수,장혁수 명지대학교 산업기술연구소 2001 産業技術硏究所論文集 Vol.20 No.-
Many of the multicast applications such as video broadcasts and teleconferencing need to support dynamic multicast sessions wherein the membership of the multicast group changes with time. Most existing multicast servers require layer 3 or layer 4 switches to support dynamic multicast sessions, thou호 the switches are not affordable to the small and medium size organizations such as colleges. In this paper, we propose and algorithm to provide live multimedia service without the switches.
Ceramic 粒子 分散 强化 Aluminium基 複合材料의 熱的成質에 關한 硏究
金大壽 三陟大學校 1992 論文集 Vol.25 No.-
The thermal Properties of Ceramic Al?O? Dispersioned Strengthening Aluminium Alloy Based Composite Materials were produced and the main results gained are as follows; The addition of Al?O? results in the decrease of thermal conductivity and as temperature increases, thermal Conductivity decreases. The thermal properties of composites depends on the shape, sige, amounts of dispersioned particle and As the Volume fraction increases, the particle distance decreases remarkbly. As the temperature increases, the thermal Coefficient increases and Reversely, As the amounts of Al?O? increases, the thermal Coefficient decreases.
單一呼氣分析에 依한 混合靜脈血液 및 動脈血液의 炭酸 GAS 張力의 測定法 및 深博出量 測定에의 應用에 關하여
金大洙 慶北大學校 醫科大學 1963 慶北醫大誌 Vol.4 No.1
This method is based upon the O_2 and CO_2 analysis of several gas samples collected successively during a single expiration of 7-10 seconds. During this period the CO_2 rises and the exchange ratio(R) falls rapidly. Theory:(1) A decrease in blood CO_2 content, with no change in O_2 content (R=∞) lowers the PCO_2. An increase in O_2 content, with no change in CO_2 content (R=O) increase the PCO_2. When R is equal to O.32, PCO_2 remains constant. (2) During expiration the alveolar PCO_2 increases, reducing the CO_2 output while the O_2 uptakes remains unaffected. Thus R is directly related to CO_2 exchange, which in turn is governed by the venous-alveolar CO_2 tension difference. As long as the mixed venous PCO_2 remains unaltered, there must be a linear relationship between alveolar PCO_2 and R, provided the arterial O_2 content remains essentially constant. Application: In each of the gas samples, PCO_2 and PO_2 and R are determined. When R is plotted versus PCO_2, a straight line is obtained as predicted. The true mixed venous PCO_2 can be read at an R value of O.32, the arterial-alveolar PCO_2 at the appropriate R, and the "oxygenated venous blood" PCO_2 at an R of O. Cardiac output determined by this method at rest and moderate exercise agree with those obtained by blood analysis methods.