http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
現職敎師와 敎員養成所 受講生의 敎職態度에 關한 比較硏究
金學守,李熙道 慶北大學校 師範大學 1971 敎育硏究誌 Vol.13 No.-
Teachers' attitudes about the teaching profession, their personalities, and their teaching behaviors influence their students. This study was undertaken to investigate how teachers and the attendants at teachers training courses (ATC) differed in the attitudes about the teaching profession; Why did they enter the teaching profession, or why did they choose the teaching profession? How do they think of receiving the honor due to their profession? How much do they satisfy with the teaching profession? How long will they remain in the teaching profession? How do they think of the teachers training course? and How do they think of the ideal teacher's personality? The subjects were 385 elementary school teachers, 304 secondary school teachers, 350 attendants at teachers training courses for elementary school (ATCE), and 270 attendants for secondary school. (ATCS). The main findings of present study were as follows: 1. The main differences in the reasons why to choose the teaching profession between school teachers and ATC are that the elementary school teachers emphasize the value of esteem, while ATCE emphasize the value of social service. And ATCS emphasize the value of time to spare, whereas the secondary school teachers do not. 2. The teachers perceive they do not receive the honor due to their profession both socially and economically, whereas ATC ththink teachers are treated well. But the teachers and ATC agree that teachers are treated well from their students. 3. The teachers are unsatisfying with their teaching profession and few teachers are satisfying, while ATCS are very much satisfying to choose the teaching profession. In accordance with the above results, many teachers want to leave their teaching professsion more than ATC. 4. Both the teachers and ATC think that teachers must receive regular teachers training courses as well as educational practices. 5. The elementary school teachers think of the ideal teacher as more flexible and extraverted than ATCE, whereas ATCE as more pleasant, intelligent, cheerful than the teachers. The secondary school teachers think of the ideal teacher as more rigid, intelligent and aggressive than ATCS. 6. While the teachers would much more emphasize patriotic as the ideal teacher's characteristics, both ATCE and ATCS almost ignore it.
김도훈,원학재,김성배,김상모,이창남,김상섭 대한건축학회 2003 대한건축학회 학술발표대회 논문집 - 계획계/구조계 Vol.23 No.1(구조계)
As time goes up, structural capacity of members decreases in reinforced concrete structures. The deterioration of the capacity is mainly due to the corrosion of materials, poor construction and environmental pollution, etc. This deterioration is unavoidable, thus it is necessary to develop the method for repair and retrofit of structures in order to ensure structural safety of members. The purpose of this paper is to investigate the load-deflection, ultimate strength, failure mode, and energy absorption effect. For the test, the specimen size of column is 20cm×20cm×90cm reinforced with 4 number of main bars of 13mm diameter, tied bars of 6mm diameter. The test results show that the increasement of bolt and bolt tension's quantity improve the ultimate strength and energy absorption capacity.
김영홍,이광학,김영진,서도수,이재운,김흥식 울산대학교 1999 공학연구논문집 Vol.30 No.2
반응온도가 증가할수록 Brand별 철광석의 환원율은 증가하였으며 일정반응온도에서 원광석형태인 Romeral 보다 펠렛형태인 CVRD,IOC 및 ALG 시편의 환원율이 더 높음을 알수 있었고 펠레시편 중 IOC가 타 시편에 비해 환원율이 가장 큼을 알 수 있었다. 수소가스에 의한 원광석 및 펠렛시편의 환원반응에서 전반응속도는 계면화학반응에 의해 율속됨을 알 수 있었으며, 활성화에너지값은 Romeral, CVRD, IOC 및 ALG의 경우 각각 약 4.8, 7.7, 4.5 및 5.3kcal/mol이었다. 이들 활성화에너지값으로부터 수소가스에 의한 환원반응은 펠렛형인 IOC가 가장 우수함을 알 수 있었다. In order to get an fundamental data to select a suitable ore brand for hydrogen reduction, the reaction kinetics of hydrogen for ore brands was investigated. Four kinds of ore brands such as Romeral ore, CVRD, IOC,ALG pellet were selected for this experiment. It was observed that the reduction ratio of pellets was higher than ore and IOC pellet showed the highest in comparing with other pellets. The kinetics data was fitted to [1-(1-R)1/3] = kt for surface reaction control. The activation energy for the reduction of Romeral, CVRD, IOC and ALG were 4.8, 7.7, 4.5 and 5.3 kcal/mol respectively. It was shown that the overall reduction rate was controlled by surface reaction. And also, we can get result that IOC was the most suitable ore for the reduction with hydrogen gas among the specimens
심도식,이봉학,홍창우,김남윤,윤경구,김동호 강원대학교 석재복합신소재제품연구센터 1998 석재연 논문집 Vol.3 No.-
본 연구는 철강석의 정제후 부수적으로 발생하는 고로슬래그 미분말을 건설분야에 이용하여 고강도콘크리트를 제조하고 이에 대한 여러 가지의 역학적 특성을 알아보고자 하는 것이다. 실험의 주요인자로서 물/시멘트비, 굵은골재의 최대치수 및 시멘트의 종류로서 슬래그시멘트와 보통시멘트를 비교하였으며 제조된 콘크리트의 경화전 특성 실험으로는 슬럼프, 공기량, 응결시간을 측정하고 경화후 압축강도, 할렬인장강도, 휨강도 및 동결-융해 저항특성 실험을 수행하였다. 실험결과 슬래그시멘트와 19mm골재를 사용하고 물/시멘트비가 낮은 경우 높은 강도 발현은 물론 500cycle 이후에서도 상대동탄성계수가 90%이상을 나타내어 동결-융해에 대한 저항성이 매우 우수함을 나타내었다. 또한 슬럼프 경시변화에서도 보통시멘트를 사용한 콘크리트에 비해 슬럼프 손실률이 상당히 적어 유동성을 확보한 고강도 콘크리트의 생산이 가능함으로써 건설분야에 활용될 수 있을 것이다. The purpose of this study is to make high strength concrete using blast furnace slag and is to know the mechanical properties about it. Major variables of experiment are the water/cement ratio, coarse aggregate maximum size, portland and slag as cement type. After measuring of slump, air content and setting time about fresh concrete, compressive, tensile and flexible strength test and freezing-thawing resistance test also were carried out about hardend concrete. The results of test showed a good resistance to become higher than 90% of a relative modulus of elasticity after 506cycles and more strength in case of lower water/cement ratio and coarse aggregate of 19mm with slag cement. Also, concrete using blast furnace slag will make practical application of construction field to be high strength concrete, a small slump loss.