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여성의 스포츠 활동 여가 참여와 자아효능감 및 생활만족의 관계
윤진민(Yoon Jin-Min),이재형(Lee Jae-Hyoung) 한국체육과학회 2008 한국체육과학회지 Vol.17 No.4
The purpose of this study was to investigate the relationship between self-efficacy and life satisfaction on participation in swimming program for women based on the survey data from 174 women participating in swimming program in indoor pools at the area of Daegu and Gyongbuk. With the empirical analysis of the data, this study find the following conclusion. First, All the degree of participation in swimming program, thus frequency of participation, time of participation, period of participation were not influenced on general self-efficacy and physical self-efficacy. In other words, degree of participation in swimming program was not related with self-efficacy. Secondly, All the degree of participation in swimming program, thus frequency of participation, time of participation, period of participation were not influenced on life satisfaction as well. Therefore, degree of participation in swimming program was not influenced on life satisfaction. Thirdly, physical self-efficacy was significant on general self-efficacy. Thus pride related to physical might be brought on a feeling of movement in one's general life. Fourth, Both self- efficacies (physical self-efficacy, general self-efficacy) were influenced on life satisfaction.
발포온도와 카본블랙 함량이 천연고무 발포체의 가황거동 및 발포특성에 미치는 영향
김준형 ( Joon Hyung Kim ),최교창 ( Kyo Chang Choi ),윤진민 ( Jin Min Yoon ),김수연 ( Soo Yeon Kim ) 한국고무학회 2006 엘라스토머 및 콤포지트 Vol.41 No.3
본 연구에서는 발포체의 가황거동과 발포특성에 발포온도 및 카본블랙 함량이 미치는 영향을 조사하기 위해 카본블랙을 변량 배합하고 145℃에서 165℃까지 5℃ 간격으로 발포하여 천연고무 발포체를 제조하였다. 발포온도 및 카본블랙 함량이 증가함에 따라 t(s2) 그리고 t(90)의 감소 경향이 관찰되었다. 본 연구에서 천연고무의 발포 가황특성의 최적 온도는 165℃ 였으며 이때 발포된 천연고무 밀도가 가장 낮은 것으로 확인되었다. 145℃에서 발포된 천연고무 발포체의 가교속도지수가 가장 작은 값을 보였다. 발포 천연고무의 발포 및 모폴로지 특성으로부터 발포체의 밀도 특성을 확인할 수 있었다. 고무내부에 생성된 각 발포 격벽의 두께는 발포 온도가 증가함에 따라 감소하는 반면 카본블랙 함량 증가와 더불어 증가함을 보였다. To investigate the influence of the foaming temperature and carbon black content on the cure behaviors and foaming characteristics of the foams, natural rubber (NR) was foamed at five temperature zones (145, 150, 155, 160 and 165℃) and different feeding ratios of the carbon black. A decreasing trend of the scorch time, t(s2) and cure time, t(90) was observed upon increasing foaming temperature and carbon black content. The optimal temperature for vulcanization and foaming of NRs in this study was considered to be 165℃ where density of the foamed NRs is lower than those at other four temperature regions. The cure rate index of the NRs foamed at 145℃ is smaller than those at 150, 155, 160 and 165℃. The results of the expansion ratio and micrographs of the foamed NRs were founded to support the density characteristics. The thickness of each of the struts formed inside the rubber matrix decreases with increasing the foaming temperature, while it increases with increasing the carbon black content.
윤진민,김부웅 釜山大學校生産技術硏究所 1996 生産技術硏究所論文集 Vol.50 No.-
Phenol을 흡착시킨 활성탄에 대한 정전류 조건하의 건기삼투 특성을 조사하였다. NaOH 수용액의 경우에 2.0volt/cm 이상의 전압구배에서 전기삼투가 일어난다. 전기삼투투과 계수와 전기삼투전달 효율은 시간 경과에 따라 변화한다. 겉보기 전기전도도는 초기에는 감소하며 시간 경과에 따라 거의 일정한 값을 갖는다. 전기삼투가 진행됨에 따라 양극에서 생성된 ??이온은 음극 쪽으로 이동한다. 50㎎/g carbon으로 활성탄에 흡착된 Phenol은 전기삼투로서 효과적으로 제거된다. Electroosmotic characteristics under constant current conditions for a activated carbon loaded with phenol were investigated. In the case of NaOH aqueous solution, electroosmosis requires the minimum potential gradient of 2.0 volt/cm. The initial apparent conductivity values decrease in time and then reach a constant value. During the electroosmosis, ??? ions generated at the anode move toward the cathode. Adsorbed phenol at a level of 50㎎/g carbon is efficiently removed.