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901.

학업성취도 부가가치에 대한 학교효과 분석

김성훈, 임미령 한국교육학회 교육학연구 27 Pages

한국교육학회 교육학연구 2011, 49권 4호 6 147-173 (27 pages)

김성훈, 임미령 저
...
- 5,600원
본 연구는 한국교육개발원의 한국교육종단조사 1,3차년도 데이터를 사용하여 학업성취도 부가가치 점수에 학교의 외적 특성(지역, 평준화여부, 국․공/사립, 남녀공학/별학, 평균 사회경제적 배경)과 내 적 특성(수준별 수업 운영여부)은 각각 어느 정도로 영향을 미치는지, 그리고 각 과목별로 학교 내적, 외적 특성들이 미치는 영향은 다른지를 분석하기 위해 2수준 다층분석 모형을 적용하였다. 그 결과. 첫째, 학교특성의 설명력은 부가가치 점수의 전체평균 11%, 국어 11%, 수학 8.4%, 영어 9%로 나타났 다. 둘째, 학업성취도...
902.

한국, 미국, 프랑스 사회과교과서를 통해 본 국제이해교육

노숙영 한국교육학회 교육학연구 29 Pages

한국교육학회 교육학연구 2005, 43권 3호 3 57-85 (29 pages)

노숙영 저
...
- 5,800원
본 연구는 청소년의 세계의식(global consciousness)을 증진하기 위한 효율적인 방법을 사회과교육에서 찾고자 하여 한국, 미국, 프랑스의 사회과교과서를 비교분석하였다. 국제이해 교육자들의 이론과 유네스코의 준거를 기준으로 국제이해교육 내용을 분석하였고, 세계적인 이슈가 되고 있는 문제들에 대한 관점의 차이를 비교하였다. 또한 잠재적 교육과정으로서 질문의 형태와 삽화들도 함께 검토하였다. 분석 결과, 한국의 교과서는 설명형이나 단정형의 문장으로 국제관련 내용을 수록하고 서술태도에서 항목에 따라 세계주의적...
903.

Interconnected meso/microporous carbon derived from pumpkin seeds as an efficient electrode material for supercapacitors

Mayakrishnan Gopiraman, Somasundaram Saravanamoorthy, Seung-Hyun Kim, Ill-Min Chung 한국탄소학회 Carbon Letters 9 Pages

한국탄소학회 Carbon Letters 2017, Vol.24 10 73-81 (9 pages)

Mayakrishnan Gopiraman, Somasundaram Saravanamoorthy, Seung-Hyun Kim, Ill-Min Chung 저
...
- 3,000원
Interconnected meso/microporous activated carbons were prepared from pumpkin seeds using a simple chemical activation method. The porous carbon materials were prepared at different temperatures (PS-600, PS-700, PS-800, and PS-900) and demonstrated huge surface areas (645?2029 m2 g?1) with excellent pore volumes (0.27?1.30 cm3 g?1). The wellcondensed graphitic structure of the prepared activated carbon materials was confirmed by Raman and X-ray diffraction analyses. The presence of heteroatoms (O...
904.

Applications of carbon-based materials in solid phase micro-extraction: a review

Jian Guo, Soo-Jin Park, Long-Yue Meng, Xinghua Jin 한국탄소학회 Carbon Letters 8 Pages

한국탄소학회 Carbon Letters 2017, Vol.24 2 10-17 (8 pages)

Jian Guo, Soo-Jin Park, Long-Yue Meng, Xinghua Jin 저
...
- 3,000원
With continuous development in the field of sample preparation technology, solid phase micro-extraction (SPME) has been widely used in analytical chemistry for high extraction efficiency and convenient operation. Different materials lead to different extraction results. Among existing materials, carbon-based materials are still attracting attention from scientists due to their excellent physical and chemical properties as well as their modifiable surfaces, which could enhance the adsorption...
905.

Sorption behavior of slightly reduced, three-dimensionally macroporous graphene oxides for physical loading of oils and organic solvents

Ho Seok Park, Sung Oong Kang 한국탄소학회 Carbon Letters 6 Pages

한국탄소학회 Carbon Letters 2016, Vol.18 4 24-29 (6 pages)

Ho Seok Park, Sung Oong Kang 저
...
- 3,000원
High pollutant-loading capacities (up to 319 times its own weight) are achieved by three-dimensional (3D) macroporous, slightly reduced graphene oxide (srGO) sorbents, which are prepared through ice-templating and consecutive thermal reduction. The reduction of the srGO is readily controlled by heating time under a mild condition (at 1 10?2 Torr and 200°C). The saturated sorption capacity of the hydrophilic srGO sorbent (thermally reduced for 1 h) could not be improved further even though the...
906.

Bulk graphite: materials and manufacturing process

Sang-Min Lee, Dong-Su Kang and Jea-Seung Roh 한국탄소학회 Carbon Letters 12 Pages

한국탄소학회 Carbon Letters 2015, Vol.16 No.3 1 135-146 (12 pages)

Sang-Min Lee, Dong-Su Kang and Jea-Seung Roh 저
...
- 4,100원
Graphite can be classified into natural graphite from mines and artificial graphite. Due to its outstanding properties such as light weight, thermal resistance, electrical conductivity, thermal conductivity, chemical stability, and high-temperature strength, artificial graphite is used across various industries in powder form and bulk form. Artificial graphite of powder form is usually used as anode materials for secondary cells, while artificial graphite of bulk form is used in steelmaking...
907.

Preparation of pitch from pyrolized fuel oil by electron beam radiation and its melt-electrospinning property

Jin-Young Jung, oung-Seak Lee 한국탄소학회 Carbon Letters 7 Pages

한국탄소학회 Carbon Letters 2014, Vol.15 No.2 10 129-135 (7 pages)

Jin-Young Jung, oung-Seak Lee 저
...
- 3,000원
Spinnable pitch for melt-electrospinning was obtained from pyrolized fuel oil by electron beam (E-beam) radiation treatment. The modified pitch was characterized by measuring its elemental composition, softening point, viscosity, molecular weight, and spinnability. The softening point and viscosity properties of the modified pitch were influenced by reforming types (heat or E-beam radiation treatment) and the use of a catalyst. The softening point and molecular weight were increased in...
908.

Morphological optimization of process parameters of randomly oriented carbon/carbon composite

Thakur Sudesh Kumar Raunija, Sushant Krunal Manwatkar, Sharad Chandra Sharma, Anil Verma 한국탄소학회 Carbon Letters 7 Pages

한국탄소학회 Carbon Letters 2014, Vol.15 No.1 3 25-31 (7 pages)

Thakur Sudesh Kumar Raunija, Sushant Krunal Manwatkar, Sharad Chandra Sharma, Anil Verma 저
...
- 3,000원
A microstructure analysis is carried out to optimize the process parameters of a randomly oriented discrete length hybrid carbon fiber reinforced carbon matrix composite. The composite is fabricated by moulding of a slurry into a preform, followed by hot-pressing and carbonization. Heating rates of 0.1, 0.2, 0.3, 0.5, 1, and 3.3°C/min and pressures of 5, 10, 15, and 20 MPa are applied during hot-pressing. Matrix precursor to reinforcement weight ratios of 70:30, 50:50, and 30:70 are also...
909.

Preparation of needle coke from petroleum by-products

Humala Paulus Halim, Ji Sun Im, Chul Wee Lee 한국탄소학회 Carbon Letters 10 Pages

한국탄소학회 Carbon Letters 2013, Vol.14 No.3 3 152-161 (10 pages)

Humala Paulus Halim, Ji Sun Im, Chul Wee Lee 저
- 3,000원
910.

Graphene growth from polymers

Hong-Kyu Seo, Tae-Woo Lee 한국탄소학회 Carbon Letters 7 Pages

한국탄소학회 Carbon Letters 2013, Vol.14 No.3 2 145-151 (7 pages)

Hong-Kyu Seo, Tae-Woo Lee 저
- 3,000원

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