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민경준,오병훈,유계준 중앙대학교 의과대학 의과학연구소 1996 中央醫大誌 Vol.21 No.2
Many studies have reported that the schizophrenic patients have some impairments in cognitive functions, especially in reaction times and vigilance. In this study reaction times and vigilance of the schizophrenic patients were measured by Dicision-Reaction Timer and Vigilance respectively, which are subtests of Vienna test System. Reaction times and vigilance of the schizophrenic patients were compared with those of normal controls. Decision time, mortor time, and total reaction time of the schizophrenic patients were higher than those of normal control. In vigilance, the schizophrenic patients had more omission errors than normal but the number of commission errors in schizophrenic patients was not higher than that of normal control. The changes of commission errors and omission errors during the Vigilance test were not different between the patient group and the control group.
Cu-Sn 10 w/o 계의 소결에서 원료동분말의 산화피막이 치수변화에 미치는 영향
민경준,이방식,이도재 대한금속재료학회(대한금속학회) 1982 대한금속·재료학회지 Vol.20 No.7
The effect of heating rate and oxide film on copper surface on the dimensional change during sintering Cu-10% Sn compact and possible mechanism for the abnormal expansion near the peritectic temperature (798℃) are suggested. Two kinds of copper powders, reduced powder and oxidized powder, are used in this experiment in order to investigate the effect of oxide film on copper surface on the dimensional change of Cu-Sn transient liquid phase sintering. According to these experimental observation, the dimensional change is strongly depended upon the amount of localized tin-rich liquid phase during sintering. The more localized tin-rich liquid phase result in more dimensional expansion. In the case of specimen which is prepared with oxidized copper powder, the dimensional expansion is smaller than that of specimen prepared with reduced copper powders. It is apparent that the thin film of copper oxide on copper powder makes easy the flowing of tin-rich liquid through the interparticles of copper which may reduce the amount of localized tin-rich phase and resulted smaller dimensional expansion subsequently.
카드뮴 급성폭로에 의한 Metallothionein 생성과 독성작용
민경준,박정덕,홍연표,장임원,Min, Kyung-Joon,Park, Jung-Duck,Hong, Yeon-Pyo,Chang, Im-Won 대한예방의학회 1993 Journal of Preventive Medicine and Public Health Vol.26 No.2
Thirty five male Sprague-Dawley rats were treated with cadmium chloride solution ranging from 0.2 to 3.2mg $CdCl_2/kg$ by intravenous single injection. At 48 hours after administration of cadmium, total cadmium, MT bound cadmium and histopathologic finding in liver, kidney, lung, heart, testis, metallothionein in liver, kidney and total cadmium in bleed were examined. Tissue cadmium concentration was highest in liver, followed by in kidney, heart, lung and testis. Cadmium bound to rnetallothionein (MT-Cd) and ratio of MT-Cd to total cadmium were increased in liver and kidney dependently of cadmium exposure dose, but not significantly changed in other organs. On histopathologic finding, the most susceptible organ was heart in considering cadmium exposed dose, but testis in considering cadmium concentration. Blood cadmium concentration was increased with dose-dependent pattern, and significantly correlated with tissue cadmium concentration, so that we may estimate tissue cadmium concentration by measurement of blood cadmium concentration. Metallothionein in liver and kidney was increased with dose-dependent pattern, higher in liver than in kidney, and was significantly correlated with tissue cadmium concentration. However, metallothionein induction efficiency of tissue cadmium(${\mu}g\;MT/{\mu}g\;Cd$) was eater in liver than in kidney, and reverse to tissue concentration or exposed dose of cadmium.
민경준 동북아관광학회 2012 동북아관광연구 Vol.8 No.2
명대 후기, 명승지를 관람하고 기행문을 남기는 등, 유람 여행의 풍조를 확산시키고 고급문화의 영역으로 까지 끌어 올린 것은 사대부였다. 그에 반해 서민 대중은 도시 근교의 토속적 신앙 행렬이나 원거리의 종교성지에 참배하면서 유람의 기회를 제공 받았다. 사대부와 유람과 서민의 그것은 달랐다. 유람에는 목적지의 경치, 고적, 길, 교통, 숙박 등에 관한 정보가 필요하다. 사대부들이 쓴 기행문은 서민 대중이 보기에는 너무 어려웠다. 그러나 명대 후기 서민 대중이 적절하게 이용할 수 있는 투박한 여행안내서가 출현하였다. 명대의 서민 대중은 문자 해독이 불가능한 사회적 부류가 아니었다. 서민들은 아동 시기의 식자 교육을 통해 문자를 읽고 쓸 수 있었다. 또한 역사 공부와 인물 이야기를 통해 초보적인 역사 지식을 가질 수 있었다. 여행안내서에 담긴 유적지나 역사 이야기는 서민 대중에게 낯선 대상이 아니었다. 서민문화는 서민이 문화의 소비는 물론 생산을 주도할 때 형성될 수 있다. 문화 상품인 여행안내서의 대량 출간은 서민 대중이 유람이라는 통로를 통해 문화를 형성하고 주도해 나가는 주체가 되었음을 상징적으로 보여주는 증거이다.