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전체 선택해제
총 236건 검색
본문검색 결과만 보기
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하수슬러지의 점도가 건조공정에 미치는 영향
김학이, 황규완, 박현서 한국열환경공학회 열환경공학 8 Pages
한국열환경공학회 열환경공학 2015, 제 12권 2호 6 50-57 (8 pages)
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Reform Policy Directions for Vocational Education in Korea
Suk-Min Chang 한국교육학회 한국교육학회 학술대회논문집 28 Pages
한국교육학회 한국교육학회 학술대회논문집 KSSE Inter 17 394-421 (28 pages)
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Problems and Constraints of Authentic Assessment among Children's Early Education Teachers
Wahyu Hidayat, Nur Asmawati Lawahid, Mujahidah 환태평양유아교육연구학회 Asia-Pacific journal of research in early childhood education 23 Pages
환태평양유아교육연구학회 Asia-Pacific journal of research in early childhood education 2021, Vol.15 No.2 5 87-109 (23 pages)
Authentic assessment aims to plan the individual learning of children by identifying specific needs, assistance or services. The current study aims to identify constraints faced by them in implementing authentic assessment of teachers in early Childhood Education in North Aceh. This study was conducted through three phases, namely the first, the study of problems and constraints of teachers in implementing assessment practices on 70 early Childhood teachers; the second phase, reviewing the... -
Adsorption of Nile Blue A from aqueous solution by different nanostructured carbon adsorbents
Shahryar Abbasi, Hadi Noorizadeh 한국탄소학회 Carbon Letters 8 Pages
한국탄소학회 Carbon Letters 2017, Vol.23 5 30-37 (8 pages)
adsorption data were analyzed using the first-order model and the pseudo-second-order model. The regression results showed that the adsorption kinetics were more accurately represented by the pseudo-second-order model. The equilibrium data for the aqueous solutions were fitted to Langmuir and Freundlich isotherms, and the equilibrium adsorption of NBA was best described by the Langmuir isotherm model. This is the first research on the removal of dye using four carbon nanostructures adsorbents. -
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)
(Fritz-Schlunder and Baudu) and one five-parameter equation (Fritz-Schlunder). Three error analysis methods, correlation coefficient, chi-square test and average relative errors, were applied to determine the best fit isotherm. The error analysis showed that the models with more than two parameters better described the picric acid sorption data compared to the two-parameter models. In particular, the Baudu equation provided the best model for the picric acid sorption data for both methods. -
Effects of cross-linking methods for polyethylene-based carbon fibers: review
Kwan-Woo Kim, Hye-Min Lee, Jeong-Hun An, Byoung-Suhk Kim, Byung-Gak Min, Shin-Jae Kang, Kay-Hyeok An, Byung-Joo Kim 한국탄소학회 Carbon Letters 24 Pages
한국탄소학회 Carbon Letters 2015, Vol.16 No.3 2 147-170 (24 pages)
interest in the use of carbon fiber reinforced plastic (CFRP) in aerospace, renewable energy and other industries, due to its low weight and relatively good mechanical properties compared with traditional metals. However, due to the high cost of petroleum-based precursors and their associated processing costs, CF remains a specialty product and as such has been limited to use in high-end aerospace, sporting goods, automotive, and specialist industrial applications. The high cost of CF is a... -
Hydrogen storage capacity of highly porous carbons synthesized from biomass-derived aerogels
Yong-Ki Choi, Soo-Jin Park 한국탄소학회 Carbon Letters 5 Pages
한국탄소학회 Carbon Letters 2015, Vol.16 No.2 9 127-131 (5 pages)
a hydrothermal reaction. After carbonization, chemical activation was conducted using potassium hydroxide to enhance the specific surface area and microporosity. The micro-structural properties and morphologies were measured by X-ray diffraction and scanning electron microscopy, respectively. The specific surface area and microporosity were investigated by N2/77 K adsorption-desorption isotherms using the Brunauer-Emmett-Teller method and Barrett-Joyner-Halenda equation, respectively. Hydrogen...
