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중학생의 성장신념 영향요인 분석: 혁신학교와 일반학교의 차이를 중심으로
임혜정, 이기혜 한국교육학회 교육학연구 29 Pages
한국교육학회 교육학연구 2019, 57권 4호 6 127-155 (29 pages)
본 연구는 경기교육종단연구 초4 패널 4~6차년도 데이터를 사용하여 중학생의 성장신념에 대한 영향요인을 구명하였다. 아울러 분석대상을 혁신학교와 일반학교로 구분하여 중학생의 성장신념에 영향을 미치는 요인들이 혁신학교 여부에 따라 어떠한 양상으로 나타나는지를 확인하였다. 이를 위해서본 연구는 패널자료 분석 방법 중 고정효과모형과 확률효과모형의 장점을 결합하여 집단 내 변화와집단 간 차이의 영향력을 동시에 파악할 수 있는 하이브리드 방법을 사용하였다. 주목할 만한 결과를중심으로 제시하면, 첫째, 혁신학교와... -
초등학교 교사가 지각하는 ‘좋은 교사’의 인식 탐색: 의미연결망 분석방법의 사용
정윤희, 이순아, 임선아 한국교육학회 교육학연구 22 Pages
한국교육학회 교육학연구 2019, 57권 2호 7 175-196 (22 pages)
본 연구는 초등교사의 ‘좋은 교사’에 대한 인식구조를 파악하기 위하여 127명의 초등교사들이 인식하는 ‘좋은 교사’에 대한 인식내용을 의미연결망 분석 방법을 사용하여 분석하였다. 그 결과를 살펴보면 다음과 같다. 첫째, 근접중심성, 매개중심성, 아이겐벡터 중심성을 모두 고려했을 때, 좋은 교사에대한 인식구조에서 가장 중요한 역할을 하는 단어는 ‘학생’으로 나타나 초등교사들이 생각하는 ‘좋은교사’에 대한 인식 중심에 ‘학생’이 있는 것으로 나타났으며, 또한 학생과 관련하여 행해지는 일련의교수 및 지도 행위와... -
Different Paths to Citizenship Development of Korean College Students by Academic Discipline
Sooji Kim, Byung Shik Rhee 한국교육학회 교육학연구 29 Pages
한국교육학회 교육학연구 2016, 54권 1호 16 401-429 (29 pages)
This study was prompted by a consciousness of the need for today’s younger generations’ enhanced citizenship. Underlying assumptions are that higher education is essentially responsible for nurturing civic minds of the young and furthermore, that it is unquestionably capable of achieving this goal. In this regard, this research delved into college involvement predictors vital to students’ citizenship development and additionally, looked for different paths to development across academic... -
Kinetic and multi-parameter isotherm studies of picric acid removal from aqueous solutions by carboxylated multi-walled carbon nanotubes in the presence and absence of ultrasound
Soheila Gholitabar, Hasan Tahermansouri 한국탄소학회 Carbon Letters 11 Pages
한국탄소학회 Carbon Letters 2017, Vol.22 2 14-24 (11 pages)
Carboxylated multi-wall carbon nanotubes (MWCNTs-COOH) have been used as efficient adsorbents for the removal of picric acid from aqueous solutions under stirring and ultrasound conditions. Batch experiments were conducted to study the influence of the different parameters such as pH, amount of adsorbents, contact time and concentration of picric acid on the adsorption process. The kinetic data were fitted with pseudo-first order, pseudo-secondorder, Elovich and intra-particle diffusion models.... -
Adsorptive removal of atmospheric pollutants over Pyropia tenera chars
Heejin Lee, Rae-su Park, Hyung Won Lee, Yeojin Hong, Yejin Lee, Sung Hoon Park, Sang-Chul Jung, Kyung-Seun Yoo, Jong-Ki Jeon, Young-Kwon 한국탄소학회 Carbon Letters 10 Pages
한국탄소학회 Carbon Letters 2016, Vol.19 10 79-88 (10 pages)
a replacement for activated carbon, biochar was synthesized and used for the adsorptive removal of formaldehyde and nitrogen oxide. Biochar was produced from the fast pyrolysis of the red marine macro alga, Pyropia tenera. The P. tenera char was then activated with steam, ammonia and KOH to alter its characteristics. The adsorption of formaldehyde, which is one of the main indoor air pollutants, onto the seaweed char was performed using 1-ppm formaldehyde and the char was activated using a range... -
Waste coffee grounds-derived nanoporous carbon nanosheets for supercapacitors
Min Hong Park, Young Soo Yun, Se Youn Cho, Na Rae Kim, Hyoung-Joon Jin 한국탄소학회 Carbon Letters 6 Pages
한국탄소학회 Carbon Letters 2016, Vol.19 8 66-71 (6 pages)
The development of nanostructured functional materials derived from biomass and/or waste is of growing importance for creating sustainable energy-storage systems. In this study, nanoporous carbonaceous materials containing numerous heteroatoms were fabricated from waste coffee grounds using a top-down process via simple heating with KOH. The nanoporous carbon nanosheets exhibited notable material properties such as high specific surface area (1960.1 m2 g?1), numerous redox-active heteroatoms... -
Cellulose-based carbon fibers prepared using electron-beam stabilization
Min Il Kim, Mi-Seon Park, Young-Seak Lee 한국탄소학회 Carbon Letters 6 Pages
한국탄소학회 Carbon Letters 2016, Vol.18 9 56-61 (6 pages)
1 h, and their carbonization yields were measured. The structure of the cellulose fibers was determined to have changed to hemicellulose and cross-linked cellulose as a result of the E-beam stabilization. The hemicellulose decreased the initial decomposition temperature, and the cross-linked bonds increased the carbonization yield of the cellulose fibers. Increasing the absorbed E-beam dose to 1500 kGy increased the carbonization yield of the cellulose-based carbon fiber by 27.5% upon exposure... -
The effects of stacking sequence on the penetration-resistant behaviors of T800 carbon fiber composite plates under low-velocity impact loading
Furqan Ahmad, Jung-Wuk Hong, Heung Soap Choi, Soo-Jin Park, Myung Kyun Park 한국탄소학회 Carbon Letters 9 Pages
한국탄소학회 Carbon Letters 2015, Vol.16 No.2 6 107-115 (9 pages)
Impact damages induced by a low-velocity impact load on carbon fiber reinforced polymer (CFRP) composite plates fabricated with various stacking sequences were studied experimentally. The impact responses of the CFRP composite plates were significantly affected by the laminate stacking sequences. Three types of specimens, specifically quasi-isotropic, unidirectional, and cross-ply, were tested by a constant impact carrying the same impact energy level. An impact load of 3.44 kg, corresponding to... -
An overview of new oxidation methods for polyacrylonitrile?based carbon fibers
Hye Kyoung Shin, Mira Park, Hak-Yong Kim and Soo-Jin Park 한국탄소학회 Carbon Letters 8 Pages
한국탄소학회 Carbon Letters 2015, Vol.16 No.1 2 11-18 (8 pages)
The process of oxidizing polyacrylonitrile (PAN)-based carbon fibers converts them into an infusible and non-flammable state prior to carbonization. This represents one of the most important stages in determining the mechanical properties of the final carbon fibers, but the most commonly used methods, such as thermal treatment (200°C to 300°C), tend to waste a great deal of process time, money, and energy. There is therefore a need to develop more advanced oxidation methods for PAN precursor... -
Effect of stacking sequence on the flexural and fracture properties of carbon/basalt/epoxy hybrid composites
Jae Il Lim, Kyong Yop Rhee, Hyun Ju Kim, Dong Ho Jung 한국탄소학회 Carbon Letters 4 Pages
한국탄소학회 Carbon Letters 2014, Vol.15 No.2 9 125-128 (4 pages)
In this study, the effect of stacking sequence on the flexural and fracture properties of carbon/ basalt/epoxy hybrid composites was investigated. Two types of carbon/basalt/epoxy hybrid composites with a sandwich form were fabricated: basalt skin-carbon core (BSCC) composites and carbon skin-basalt core (CSBC) composites. Fracture tests were conducted and the fracture surfaces of the carbon/basalt/epoxy hybrid composites were then examined using scanning electron microscopy (SEM). The results...
