http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
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.
盧戊根,金大壽 三陟大學校 1994 論文集 Vol.27 No.-
It is the purpose of this study to investigate the solidification behavior and mode of Ai-16% Cu alloy. Therefore, they were cast in different cooling rate of mold and thermal analysis were done to investigate the Centerline Feeding Resistance(CFR) and Mushy Degree of Eutectic Solidification(MDE). The relationship between mold size and centerline feeding resistance shows the larger CFR in wide diameter of mold, and CFR in castable mold shows the larger value than the metallic mold at the degree of undercooling. The influence of cooling rate of mold on the variation of CFR is that the cooling ability increase of mold promotes the skin forming solidification. As the degree of undercooling increases, the mushy degree of eutectic solidification increases and in metallic mold, the mushy degree of eutectic solidification shows the less value in the little size of mold diameter. As the degree of undercooling increases, the mushy degree if eutectic solidification increases by increasing the dendrite length. The solidification mode of the alloy in this experiment shows the mushy type by investigating the MDE value.
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.
姜慶愛,申澤均,金大洙 대구교육대학교 1975 論文集 Vol.11 No.-
This study is attempted to develope a better way of forming the concepts of mathematics in teaching and learning. A lot of basic concepts of mathematics have been mostly instructed in the primary school in such a way as verbal explanation. Therefore, no opportunity has ever been given to pupils for their logical, rational way of thinking. Some teaching-learning ways of concepts formation has been already expressed but no teaching-learning pattern as to what steps must be taken for their instruction has been yet found. This paper aims at developing such a pattern and helping the inservice teachers apply it for the improvement of mathematics education. The concepts to be instructed in the primary school are divided into three-objective, operative and relative. As they are considerd to be taught in different ways, the fellowing patterns are made. The objective concepts are to be instructed in such a way as ① pattern presentation, ② comprehension as a set, ③ concepts building, ④ definition of concepts ⑤ application; the operative concepts as ① motivation, ② comprehension as a set, ③ concepts building, ④ being made into notation, ⑤ training for skill, the relative concepts as ① case presentation, ② comprehension as a set, ③ concepts building, ④ being made into notation, ⑤ application. According to this, <prism> was actually instructed in the sixth grade of primary school for the understanding of objective concepts; <adding> in the first grade for operative concepts; <perpendiculum> in the fourth grade for relative concepts. The results showed easy and correct understanding as well as logical and rational thinking on the part of school boys and girls. The assumption that the process of forming the three patterns may be different was wrong and a general model was mode: model presentation→comprehension as a set→concepts building→being made into notation→application. All that is needed is that the teaching method of each step should be different.
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.