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科學敎育의 革新이라는 時代的 要請에 따라 科學의 다른 分科와 마찬가지로 化學도 그 敎育課程의 改革이 時急하게 되었다. 本 硏究는, ① 化學敎育課程의 理論的 背景이 된 敎育學 및 心理學을 檢討하므로써 科學敎育에 對한 化學者의 關心度를 높이고, ② 美國을 비롯한 英國 및 濠洲의 새로운 高校化學 CHEM Study (美), CBA (美), Nuffield (英) 및 SS Chemistry (濠)를 分析比較한 다음, ③ 構造를 中心으로 한 새로운 化學敎育課程의 特徵을 밝혀 이들의 原理的, 現實的 問題點을 살피므로서, 새로 制定될 우리 나라 化學敎育課程의 構造決定에 이바지함을 目的으로 한다. 새로운 化學敎育課程의 가장 큰 理論的 特徵으로는, ① 基本構造 强調를 通한 化學의 構造化, ② 進步主義 敎育思想의 長點을 折衷한 새로운 學習心理의 참신한 適用, ③ 知的水準의 大擔한 引上, ④ 徹底한 스스로의 經驗과 豊富한 代理經驗이 中心이 되는 學習構造 등을 들 수 있다. 本 硏究에서 分析比較한 CHEM Study를 비롯한 네 가지 化學敎育資料의 거의 全部가 이와 같은 理論的 特徵에 充實한 敎育課程으로 되어 있음을 알 수 있다. 本 硏究에서 네 가지 敎育資料의 分析比較의 結果를 基礎로 하여 化學學習의 構造와, 化學敎育課程의 基本構造에 關한 試案을 마련 하였다. 그리고 化學의 構造化에 치우치는 남어지 豫想되는 各論的知識의 缺乏이 化學敎育에 미칠 영향을 비롯하여, 構造化된 새로운 化學敎育課程을 導入하게 될 경우 原理的 또는 現實的으로 考慮해야 할 問題點을 提起하였다. The main purpose of this study is to inquire briefly into certain aspects of the structure of chemistry in high school level, the minor purpose of the study being a suggested improvement of its curriculum for chemistry teaching. First, the theoretical (pedagogical and psychological) background of curriculum for chemistry are discussed. Second, CHEM Study (U.S.A), CBA (U.S.A), Nuffield (England) and Senior Science part2 Chemistry (Australia) are discussed from the points of view: ① structure, ② pedagogical and psychological characteristics, ③ chemical contents, all by the analysis of the materials of all of four projects. Third, this study proposes an idea of new pattern of a basic structure in chemistry, and recommends a new structure of learning for chemistry in high school level.
This paper were investigated by questionnaireform (physical, mental and nouro-sensory subjective fatigue symptoms) on 573 student High School girls attached to industrial Co. in order to measure the degree of fatigue caused by work. 1. The fatigue after work in H.G. attaehed to industrial Co. was found highest in physical, next in neuro-sensory and mental in the order. 2. The total mean according to age in subject Group was 2.5 higher after before work. 3. The fatigue after work according to grade was 2.5 higher than that before work. 4. The increase of the fatigue according to differenee of Age and grade were slight. 5. The Growth of total mean according to each Item bejore and after work was highest by 18.2% on physical Item.
Static oxidation kinetics of the titanium aluminide alloy Ti-25Al-10Nb-3V-1Mo were investigated in aer over the temperature range of 650℃ to 1000℃ using thermogravimetric analysis. The oxidation kinetics were complex at all exposure temperatures and displayed up to three distinct oxidation rates. Breakaway oxidation occurred after long exposure times at high temperatures. Oxidation products were determined using X-ray diffraction techniques, electron microprobe analysis, and energy dispersive X-ray analysis. The oxides during the parabolic stages were compact and multilayered, consisting primarily of TiO₂doped with Nb, a top layer of Al₂O₃and a thin bottom layer of TiN. The transition between the second and third parabolic stage was found to be linked to the formation of a TiAl layer at the oxide-metal interface. Porosity was also formed during the third stage, causing degradation of the oxide and the beginning of breakaway oxiadtion.
For the purpose of comparing and analyzing the characteristies of physical development between educable mentally Retarded children(I.Q from 50 to 75), and Healthy children, on the basic of physical measurement, by using a Total of 784 mentally Retarded children(385 boys, 399 girls), and 1,107 Healthy children(548 boys, 559 girls) at ages from 9 yrs to 19 yrs: depending on the degree of growth, characteristics of the development curve, and the degree of correlation between physical Growth and the Health index. The physical growth and development: is seen as the result of analyzing by height, body weight, chest circumference and sitting height of specific age groups, generally: the mentally Retarded children were found to be slightly smaller than the Healthy groups: especially, there was a significant difference in the two groups in the secondary rapid growth period(P<0.01), such that this growth was stopped earlier in the mentally retarded group. Health index, the relative body weight increased by ago and the mentally Retarded group showed a low index: especially there was a very significant difference between the two groups in the ages of 13 to 16 in the case of boys, and 11 yrs to 14 yrs in the case of girls(P<0.01) in the case of the relative chest circumference index, the boys measurement crossed at 15 yrs, and after this 15 yrs, period, the mentally retarded groups showed the higher index, there were no increases by age: and in the case of girls, the mentally retarded group had the higher index. In relative sitting height index, the mentally retarded groups were superior to the healthy groups from 9 yrs to 19 yrs. The Rohrer index, kaup index, vervaeck index, and obesite index: which shows the state of nourishment: showed a lower index in the groups of the mentally retarded than in the healthy groups, but the difference was not nearly significant. The correlation between physical growth and health index: shows a high correlation in relative weight, kaup index, obesity index, and Rohrer index in this order: and the results are the same for both male and female. Synthesizing from above, the mentally retarded group shows a low physical growth and a slightly different physical development: but in health index: especially, the nutrition index shows differences which are not significant.
This paper was conducted on the status of physical development (height, body-weight, chest circumference, sitting height) and physiological function (vital capacity, heart rate, blood pressure) for mentally retarded and healthy students, as a means of data was measured by trained workers. A total of 926 educable mektally retarded (I. 0. from 50 to 75) students aged 7 to 19 in daegu area was studied, a total of 1,251 normal students of same aged and area was also studied as a control. In height and body-weight, the R-group were found to be smaller than the H-group in boys and girls, and the difference was showed large scale aged from 12 to 13 and 15 to 16 yrs. In chest circumference, the R group were much smaller than the H group after the age of 16 yrs in boys, but in girls, the R group was superior to H group 0 over all age. In sitting height, R and H group were showed similar development curve line in boys and girls, 111 particular, in occasion of boys, the difference was severe (p<0.1) age from 16 to 17 yrs, and in girls age from 13 to 14 yrs. In vital capacity, R group was showed Smaller than the H group as generally, specially, in case of boys, the difference was showed large scale (p<0.1) after 15yrs. In heart rate, 111 occasion of boys, K group was showed a little superiority except on 15 yrs KO 17 yrs, in girls, R group was showed a little superior to H group in generally. In blood pressure, several points of intersections between R and H group was showed in boys and girls. By synthesizing the above results, the R group was less than the H group over all physical development. The only chest circumference in female showed superior in R group, and heart rate was superior in H group in physioiogical function.