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701.

영국 신교육운동이 우리 대안교육에 주는 시사점

박용석 한국교육학회 교육학연구 21 Pages

한국교육학회 교육학연구 2011, 49권 3호 2 33-53 (21 pages)

박용석 저
...
- 5,000원
본 연구는 20세기 초반 영국에서 진행된 서구의 대안교육운동이라고 할 수 있는 신교육운동(New Eduation Movement)이 우리의 대안교육운동의 발전을 위해서 제시해주는 시사점이 무엇인지를 도출 하고자 하였다. 이를 위해서 우선 영국 신교육운동을 개척한 선구적 학교들인 애보츠홈(Abbotsholme) 학교와 비데일즈(Bedales)학교가 보여준 ‘새학교(New School)\'의 특징을 살펴본 후 20세기 초반 영국 에서 전개된 비권위주의 교육운동의 과정을 고찰하였다. 이어서 20세기 초반의 신교육운동이 20세기 중,후반 영국의 공교육과 교수법...
702.

외국의 사교육 현상에 대한 고찰 및 정책적 시사점

김지하, 백일우 한국교육학회 교육학연구 30 Pages

한국교육학회 교육학연구 2006, 44권 3호 6 131-160 (30 pages)

김지하, 백일우 저
...
- 5,900원
본 연구의 목적은 한국뿐만 아니라 동남아시아. 아프리카. 유럽, 영미권 등지에서도 현저하게 증가하고 있는 사교육을 연구의 대상으로 삼아 분석한 외국의 연구물들을 교육경제학적 분석틀에 기초하여 구분한 후, 주요 연구결과를 중심으로 시사점을 찾고, 발전적인 정책 방향을 모색하는 것이다.. 연구결과에 의하면 첫째, 사교육 시장분석 결과, 사교육 수요의 주된 동기는 국가별로 다르지만 아시아 지역은 노력을 강조하는 사회․문화적 배경에 기인하고 영미권 지역은 신자유주의 사상에 기반한 단위학교의 성취도를...
703.

Synthesis and physicochemical characterization of NixZnx- FeO₂O₄/MWCNT nanostructures as enzyme mimetics with peroxidase-like catalytic activity

Navvabeh Salarizadeh, Minoo Sadri, Hassan Hosseini, Reza. H. Sajedi 한국탄소학회 Carbon Letters 8 Pages

한국탄소학회 Carbon Letters 2017, Vol.24 14 103-110 (8 pages)

Navvabeh Salarizadeh, Minoo Sadri, Hassan Hosseini, Reza. H. Sajedi 저
...
- 3,000원
Carbon-based magnetic nanostructures in several instances have resulted in improved physicochemical and catalytic properties when compared to multi-wall carbon nanotubes (MWCNTs) and magnetic nanoparticles. In this study, magnetic MWCNTs with a structure of NixZnxFe2O4/MWCNT as peroxidase mimics were fabricated by the one-pot hydrothermal method. The structure, composition and morphology of the nanocomposites were characterized with X-ray diffraction (XRD), Fourier transform infrared...
704.

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)

Shahryar Abbasi, Hadi Noorizadeh 저
...
- 3,000원
Dyes are widely used in various industries including textile, cosmetic, paper, plastics, rubber, and coating, and their discharge into waterways causes serious environmental and health problems. Four different carbon nanostructures, graphene oxide, oxidized multi-walled carbon nanotubes, activated carbon and multi-walled carbon nanotubes, were used as adsorbents for the removal of Nile Blue A (NBA) dye from aqueous solution. The four carbon nanostructures were characterized by scanning electron...
705.

Three-dimensional porous graphene materials for environmental applications

Muruganantham Rethinasabapathy, Sung-Min Kang, Sung-Chan Jang, Yun Suk Huh 한국탄소학회 Carbon Letters 13 Pages

한국탄소학회 Carbon Letters 2017, Vol.22 1 1-13 (13 pages)

Muruganantham Rethinasabapathy, Sung-Min Kang, Sung-Chan Jang, Yun Suk Huh 저
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- 4,200원
industry, as well as via unpredictable accidents. In addition, water pollution is also caused by radionuclides released by nuclear disasters or leakage. This review presents an overview of the state-of-the-art synthesis methodologies of 3D porous graphene materials and highlights their synthesis for environmental applications. The various synthetic methods used to prepare these 3D materials are discussed, particularly template-free self-assembly methods, and template-directed methods. Some key...
706.

Microwave-assisted pretreatment technologies for the conversion of lignocellulosic biomass to sugars and ethanol: a review

Pradeep Puligundla, Sang-Eun Oh, Chulkyoon Mok 한국탄소학회 Carbon Letters 10 Pages

한국탄소학회 Carbon Letters 2016, Vol.17 No.1 1 1-10 (10 pages)

Pradeep Puligundla, Sang-Eun Oh, Chulkyoon Mok 저
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- 3,000원
Lignocellulosic biomass conversion to biofuels such as ethanol and other value-added bio-products including activated carbons has attracted much attention. The development of an efficient, cost-effective, and eco-friendly pretreatment process is a major challenge in lignocellulosic biomass to biofuel conversion. Although several modern pretreatment technologies have been introduced, few promising technologies have been reported. Microwave irradiation or microwave-assisted methods (physical and...
707.

Influence of laminated orientation on the mechanical and thermal characteristics of carbon-fiber reinforced plastics

Hee-Jae Shin, Lee-Ku Kwac, Min-Sang Lee, Hong-Gun Kim 한국탄소학회 Carbon Letters 6 Pages

한국탄소학회 Carbon Letters 2015, Vol.16 No.4 3 241-246 (6 pages)

Hee-Jae Shin, Lee-Ku Kwac, Min-Sang Lee, Hong-Gun Kim 저
...
- 3,000원
In this paper, the effect of the direction of lamination in CFRP on the absorbed impact energy and impact strength were evaluated, including symmetric ply (0°/0°, ?15°/+15°, ?30°/+30°, ?45°/+45°, and ?90°/+90°) and asymmetric ply (0°/15°, 0°/30°, 0°/45°, and 0°/90°), through drop-weight impact tests. Further, the thermal properties of the specimens were measured using an infrared camera. Correlations between the absorbed impact energy, impact strength, and thermal properties as...
708.

Advances in liquid crystalline nano-carbon materials: preparation of nano-carbon based lyotropic liquid crystal and their fabrication of nano-carbon fibers with liquid crystalline spinning

Yong-Mun Choi, in Jung Jun Yeon, Hwang Seung Min, Kim Hyeonsu Jeong, Bon-Cheol Ku, Munju Goh 한국탄소학회 Carbon Letters 10 Pages

한국탄소학회 Carbon Letters 2015, Vol.16 No.4 1 223-232 (10 pages)

Yong-Mun Choi, in Jung Jun Yeon, Hwang Seung Min, Kim Hyeonsu Jeong, Bon-Cheol Ku, Munju Goh 저
...
- 3,000원
This review presents current progress in the preparation methods of liquid crystalline nanocarbon materials and the liquid crystalline spinning method for producing nano-carbon fibers. In particular, we focus on the fabrication of liquid crystalline carbon nanotubes by spinning from superacids, and the continuous production of macroscopic fiber from liquid crystalline graphene oxide.
709.

Molecular approach to hexagonal and cubic diamond nanocrystals

Mudar Ahmed Abdulsattar 한국탄소학회 Carbon Letters 6 Pages

한국탄소학회 Carbon Letters 2015, Vol.16 No.3 5 192-197 (6 pages)

Mudar Ahmed Abdulsattar 저
...
- 3,000원
In the present work, we propose a molecule (C14H14) that can be used as a building block of hexagonal diamond-type crystals and nanocrystals, including wurtzite structures. This molecule and its combined blocks are similar to diamondoid molecules that are used as building blocks of cubic diamond crystals and nanocrystals. The hexagonal part of this molecule is included in the C12 central part of this molecule. This part can be repeated to increase the ratio of hexagonal to cubic diamond and...
710.

Thermal properties in strong hydrogen bonding systems composed of poly(vinyl alcohol), polyethyleneimine, and graphene oxide

Sua Choi, Duck Kun Hwang and Heon Sang Lee 한국탄소학회 Carbon Letters 8 Pages

한국탄소학회 Carbon Letters 2014, Vol.15 No.4 8 282-289 (8 pages)

Sua Choi, Duck Kun Hwang and Heon Sang Lee 저
...
- 3,000원
Blends of poly(vinyl alcohol) (PVA), polyethyleneimine (PEI), and graphene oxide (GO) were prepared by solution casting method. Calorimetric thermal properties of the blends were investigated. The Tgs of PVA/PEI blends were higher than the Tgs of either of the component polymers at low concentrations of PEI. These abnormal increases of Tgs may be due to the negative entropy of mixing which is associated with strong hydrogen bonding between PVA and PEI. The degree of depression of s was not...

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