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전체 선택해제
총 77건 검색
본문검색 결과만 보기
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The Influence of Principals’ Safety Leadership on Teachers’ Safety Behavior in Korea
Kim Ee-gyeong, Ahn Ji-yoon, Min Soo-bin 한국교육학회 교육학연구 23 Pages
한국교육학회 교육학연구 2021, 59권 3호 1 1-23 (23 pages)
Safety leadership has been reported to affect the safety behavior of employees in industrial organizations. However, little is known about the correlation between principals’ safety leadership and the teachers’ safety behavior within a school organization. The purpose of this study is to analyze whether principals’ safety leadership affects teachers’ safety behavior in elementary and secondary schools in Korea. Based on the data obtained from an online survey with responses from 910 teachers... -
한부모가정 아동의 역기능적 분노표현 방식이 우울과 외현화 문제행동에 미치는 영향: 가족기능성의 조절효과를 중심으로
이혜림, 이동훈 한국교육학회 교육학연구 28 Pages
한국교육학회 교육학연구 2016, 54권 1호 2 25-52 (28 pages)
본 연구는 한부모가정 아동의 역기능적 분노표현 방식과 우울 및 외현화 문제행동의 관계에서 가족 기능성이 조절효과를 가지는지 알아보았다. 광역시에 소재한 2곳의 초등학교와 13곳의 지역아동센터 4, 5, 6학년 164명(남 81명, 여 83명)의 학생들을 대상으로, 역기능적 분노표현 방식, 우울, 외현화 문제 행동, 가족기능성 척도를 사용하여 설문조사를 실시하였으며, 위계적 중다회귀분석 방법을 사용하여 한부모가정 아동의 역기능적 분노표현 방식과 우울 및 외현화 문제행동의 관계에서 가족기능성의 조 절효과를 검증하였다. 그... -
Activating needle coke to develop anode catalyst for direct methanol fuel cell
Young Hun Park, Ui-Su Im, Byung-Rok Lee, Dong-Hyun Peck, Sang-Kyung Kim, Young Woo Rhee, Doo-Hwan Jung 한국탄소학회 Carbon Letters 6 Pages
한국탄소학회 Carbon Letters 2016, Vol.20 7 47-52 (6 pages)
Physical and electrochemical qualities were analyzed after KOH activation of a direct methanol fuel cell using needle coke as anode supporter. The results of research on support loaded with platinum-ruthenium suggest that an activated KOH needle coke container has the lowest onset potential and the highest degree of catalyst activity among all commercial catalysts. Through an analysis of the CO stripping voltammetry, we found that KOH activated catalysis showed a 21% higher electrochemical... -
Enhanced electrocapacitive performance and high power density of polypyrrole/graphene oxide nanocomposites prepared at reduced temperature
Harish Mudila, Varsha Joshi, Sweta Rana, Mohmd. Ghulam Haider Zaidi, Sarfaraz Alam 한국탄소학회 Carbon Letters 9 Pages
한국탄소학회 Carbon Letters 2014, Vol.15 No.3 3 171-179 (9 pages)
An attempt was made to investigate the effect of the preparation temperature on the electrocapacitive performance of polypyrrole (PPY)/graphene oxide (GO) nanocomposites (PNCs). For this purpose, a series of PNCs were prepared at various temperatures by the cetyltrimethylammonium bromide-assisted dilute-solution polymerization of pyrrole in presence of GO (wt%) ranging from 1.0 to 4.0 with ferric chloride as an oxidant. The formation of the PNCs was ascertained through Fourier-transform infrared... -
Hierarchical porous carbon nanofibers via electrospinning
Aikifa Raza, Jiaqi Wang, Shan Yang, Yang Si, Bin Ding 한국탄소학회 Carbon Letters 14 Pages
한국탄소학회 Carbon Letters 2014, Vol.15 No.1 1 1-14 (14 pages)
Carbon nanofibers (CNFs) with diameters in the submicron and nanometer range exhibit high specific surface area, hierarchically porous structure, flexibility, and super strength which allow them to be used in the electrode materials of energy storage devices, and as hybrid-type filler in carbon fiber reinforced plastics and bone tissue scaffold. Unlike catalytic synthesis and other methods, electrospinning of various polymeric precursors followed by stabilization and carbonization has become a...
