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배드민턴수업의 기능중심모형과 이해중심게임모형에 대한 인식도와 수업만족도 비교
정인국(In Guk Jeong),황영성(Young Sung Hwang),정일홍(Il Hong Jeong) 한국체육교육학회 2011 한국체육교육학회지 Vol.16 No.1
본 연구는 고등학교 배드민턴수업에 기능중심수업모형과 이해중심게임수업모형을 적용하고 각 모형에 대한 학생의 인식의 차이 및 수업만족도를 비교·분석하여 체육교육목적에 적합하고, 수업의 질적 효과를 높일 수 있는 수업모형을 찾고자하데 그 목적이 있다. 연구 가설을 검증하기 위해 연구대상으로 B시 소재 G고교 1학년 여학생 208명을 대상으로 체력 및 체격에 관한 동질성 검사를 통해 기능중심수업모형 집단 41명, 이해중심게임수업모형 집단 41명의 2개 집단(반)을 선정하였다. 배드민턴수업에서 수업모형 적용은 주 2시간, 약 2개월간의 12차시로 운영하였다. 수업모형 적용 후 배드민턴수업의 인식도와 만족도에 대한 이해중심게임수업모형 집단과 기능중심수업모형 집단 간의 차이를 알아보기 위해 먼저 평균과 표준편차를 산출하였고, 이를 바탕으로 집단 간 평균 차이를 알아보기 위해 독립표본 t 검증을 실시하였다. 이와 같은 바탕으로 다음과 같은 연구 결론을 얻었다. 첫째, 배드민턴수업에 있어서 여고생의 수업인식도는 이해중심게임수업모형이 기능중심수업모형보다 높게 나타났다. 둘째, 배드민턴수업에 있어서 여고생의 수업만족도는 이해중심게임수업모형이 기능중심수업모형보다 높게 나타났다. This study is a survey investigation aimed at finding teaching learning methods that can improve qualitative teaching effectiveness and be appropriate for the purposes of physical education by comparing and analyzing students` perception difference and the satisfaction about each approach-the technique-oriented approach and teaching games for understanding approach-applied to badminton classes of a high school. To verify the hypothesis of this study, I chose 2 groups-as an object of this study, one was 41 students of technique-oriented approach group and the other was 41 students of the teaching games for understanding approach group-through the homogeneity test on stamina or physical conditions of 208 first-year girls students in G high school located in B city. Two groups were composed of homogeneous ones which had similar stamina or physical conditions, and I conducted the teaching approaches in badminton classes of 12 periods twice a week for around 2 months. After conducting two teaching approaches, I calculated the average and the standard deviation in order to know the difference between groups-the technique-oriented approach group and teaching games for understanding approach group-about the perception and satisfaction of badminton classes. On the basis of these, I used the independent sampling t-test in order to know the difference of average between groups. The results of this study are as follows. First, in badminton classes, concerning the class perception of high school girls students, the teaching games for understanding approach was higher than the technique-oriented approach. Second, in badminton classes, concerning the class satisfaction of high school girls students, the teaching games for understanding approach was also higher than the technique-oriented approach.
진공관형 집열기 히트파이프 접촉방식에 따른 집열성능 비교
윤지훈(Ji hun Yun),정인국(In guk Jeong),이중섭(Chung seob Yi),정경택(Kyeong teak Jeong),서정세(Jeong se Suh) 대한기계학회 2011 대한기계학회 춘추학술대회 Vol.2011 No.10
In this study, it was compared collecting performance according to contact types between heatpipe and manifold of vacuum tube type solar collector. Between two types, direct contact type is better in collecting performance. On the other hand, Indirect type have advantage in maintenance. In the result of numerical analysis, As the temperature of heatpipe and flow rate of working fluid increased, difference of outlet mean temperature of two types became large. Also, it could be confirmed, as contact resistance between heatpipe and copper wall in indirect type increased, the difference increased too. Useful data in selection and design in vacuum tube type solar collector were proposed by the results of numerical analysis.
진공관형 집열기 히트파이프 접촉방식에 따른 집열성능 비교
윤지훈(Ji-Hun Yun),정인국(In-Guk Jeong),이중섭(Chung-Seob Yi),정경택(Kyung-Teak Chung),서정세(Jeong-Se Suh) 한국기계가공학회 2011 한국기계가공학회지 Vol.10 No.6
In this study, it was compared collecting performance according to contact types between heatpipe and manifold of vacuum tube type solar collector. Between two types, direct contact type is better in collecting performance. On the other hand, Indirect type have advantage in maintenance. In the result of numerical analysis, As the temperature of heatpipe and flow rate of working fluid increased, difference of outlet mean temperature of two types became large. Also, it could be confirmed, as contact resistance between heatpipe and copper tube in indirect type increased, the difference increased too. Useful data in selection and design in vacuum tube type solar collector were proposed by the results of numerical analysis.
이중섭(Chung-Seob Yi),정인국(In-Guk Jeong),서정세(Jeong-Se Suh),정상완(Sang-Wan Chung) 한국기계가공학회 2012 한국기계가공학회지 Vol.11 No.6
In this study, it was grasped to the flow characteristics of injection nozzle installed in high pressure holder for improving productivity. Chip curling occurred during cutting process for difficult-to-cut material detracts product qualities and productivity. Among of method preventing the phenomenon, high pressure injecting cutting oil is an alterative. In this study, the optimal nozzle was designed by CFD method and it was conducted to analyse on the effect of high pressure injection on chip shape generated during cutting process and wear of insert by experimental method. As the result, it could be confirmed that high pressure injection is favorable for preventing chip curling and insert from wearing.