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601.

초등학생의 사회역량 발달에 영향을 미치는 개인 및 학교 요인 탐색 : 학습문화와 학교폭력을 중심으로

박종효, 최지영 한국교육학회 교육학연구 28 Pages

한국교육학회 교육학연구 2014, 52권 1호 4 89-116 (28 pages)

박종효, 최지영 저
...
- 5,700원
본 연구는 한국교육개발원의 학교교육 실태 및 수준 분석 자료를 활용하여 초등학생의 사회역량에 영향을 미치는 학생 및 학교 요인을 탐색하는데 그 목적이 있다. 본 연구대상은 전국 250개교의 초등 학교에 재학 중인 6학년 학생 12,242명이다. 본 연구에서는 학생과 학교의 2수준 다층분석을 실시하였 다. 1수준 학생변인은 성별, 직전 학년(5학년)의 성적, 인성과 봉사, 그리고 따돌림 피해경험이 포함되 었고 2수준 학교변인은 학생이 지각한 경쟁 및 협력 학습문화, 학교소재지(예. 특별시), 교육비지원 학 생비율, 학교알리미의...
602.

성인대학생의 학습동기에 관한 질적 연구

홍아정 한국교육학회 교육학연구 28 Pages

한국교육학회 교육학연구 2010, 48권 3호 7 159-186 (28 pages)

홍아정 저
...
- 5,700원
본 연구는 대학에 입학한 성인학습자들의 학습동기를 그들의 생애 이야기(life stories)를 통하여 고 찰하는데 그 목적이 있다. 성인학습자들을 대상으로 하는 많은 연구들은 학습참여율, 학습참여유형 등 의 학습참여 실태를 분석하여 일반화하는 거시적 관점에서 접근하고 있으나, 본 연구는 성인학습자들 의 삶의 경험을 바탕으로 학습참여의 의미를 성찰하고 해석하는데 그 초점을 두었다. 연구대상자들은 30세 이상의 나이에 대학에 입학한 20명의 성인대학생 혹은 대학 졸업생으로 선정하였고, 연구 참여 자들의 생애 경험을...
603.

Physicochemical properties and methane adsorption performance of activated carbon nanofibers with different types of metal oxides

Faten Ermala Che Othman, Norhaniza Yusof, Hasrinah Hasbullah, Juhana Jaafar, Ahmad Fauzi Ismail, Noor Shawal Nasri 한국탄소학회 Carbon Letters 8 Pages

한국탄소학회 Carbon Letters 2017, Vol.24 11 82-89 (8 pages)

Faten Ermala Che Othman, Norhaniza Yusof, Hasrinah Hasbullah, Juhana Jaafar, Ahmad Fauzi Ismail, Noor Shawal Nasri 저
...
- 3,000원
that of the pristine ACNFs and ACNF/MnO2 which is 478 and 430 m2 g?1, respectively. FTIR analysis showed peaks of 476 and 547 cm?1, indicating the presence of MgO and MnO2, respectively. The FESEM micrographs analysis showed a smooth but coarser structure in all the ACNFs. Meanwhile, the ACNF/MgO has the smallest fiber diameter (314.38±62.42 nm) compared to other ACNFs. The presence of MgO and MnO2 inside the ACNFs was also confirmed with EDX analysis as well as XRD. The adsorption capacities...
604.

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
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 and N) in the carbon materials was confirmed by X-ray photoemission spectroscopy. High resolution transmission electron microscopic images and selected area diffraction patters further revealed the porous structure and amorphous nature of the prepared electrode materials. The...
605.

Effect of added mesophase pitch during the pitch synthesis reaction of PFO

Ji Hong Kim, Jong Gu Kim, Chul Wee Lee, Ki Bong Lee, Ji Sun Im 한국탄소학회 Carbon Letters 7 Pages

한국탄소학회 Carbon Letters 2017, Vol.23 7 48-54 (7 pages)

Ji Hong Kim, Jong Gu Kim, Chul Wee Lee, Ki Bong Lee, Ji Sun Im 저
...
- 3,000원
This research considers the effect of added mesophase pitch (MP) as an additive during the pitch synthesis reaction of pyrolyzed fuel oil (PFO). Two effects are generated by adding MP. One is an enhancement of thermal stability due to the high thermal property of the additive; the other is that the volatile compounds that were removed by vaporization of PFO during the thermal reaction can participate in the pitch synthesis reaction (PFO→pitch) more efficiently. The effect differs according to...
606.

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...
607.

Fabrication of nitrogen doped ordered mesoporous carbon derived from glucosamine with hybrid capacitive behaviors

Deyi Zhang, Mei Han, Yubing Li, Bing Wang, Yi Wang, Kunjie Wang, Huixia Feng 한국탄소학회 Carbon Letters 8 Pages

한국탄소학회 Carbon Letters 2017, Vol.23 2 9-16 (8 pages)

Deyi Zhang, Mei Han, Yubing Li, Bing Wang, Yi Wang, Kunjie Wang, Huixia Feng 저
...
- 3,000원
dual mesoporous structure with small mesopores centered at 3.6 nm and large mesopores centered at 9.9 nm was observed. The specific capacitance of the reported materials reached up to 328 F g?1, which was 2.1 times higher than that of pristine CMK-3. The capacitance retention rate was found to be higher than 87.9% after 1000 charge/discharge cycles. The supplementary pseudocapacitance as well as the enhanced wettability and conductivity due to the incorporation of nitrogen heteroatoms within the...
608.

A facile green reduction of graphene oxide using Annona squamosa leaf extract

Basavaiah Chandu, Venkata Sai Sriram Mosali, Bhanu Mullamuri, Hari Babu Bollikolla 한국탄소학회 Carbon Letters 7 Pages

한국탄소학회 Carbon Letters 2017, Vol.21 9 74-80 (7 pages)

Basavaiah Chandu, Venkata Sai Sriram Mosali, Bhanu Mullamuri, Hari Babu Bollikolla 저
...
- 3,000원
ultraviolet-visible (UV-Vis), X-ray photoelectron spectroscopy (XPS) and Raman spectroscopic techniques. Removal of oxygen containing moieties from the GO was confirmed by UV-Vis, FT-IR and XPS spectroscopic data. The XRD and Raman data further confirmed the formation of the CRG. TEM images showed the sheet structure of the synthesized CRG. These results show that the phytochemicals present in custard apple leaf extract act as excellent reducing agents. The CRG showed good dispersion in water.
609.

Green synthesis of fluorescent carbon dots from carrot juice for in vitro cellular imaging

Yang Liu, Yanan Liu, Mira Park, Soo-Jin Park, Yifan Zhang, Md Rashedunnabi Akanda, Byung-Yong Park, Hak Yong Kim 한국탄소학회 Carbon Letters 7 Pages

한국탄소학회 Carbon Letters 2017, Vol.21 7 61-67 (7 pages)

Yang Liu, Yanan Liu, Mira Park, Soo-Jin Park, Yifan Zhang, Md Rashedunnabi Akanda, Byung-Yong Park, Hak Yong Kim 저
...
- 3,000원
We report the use of carrot, a new and inexpensive biomaterial source, for preparing high quality carbon dots (CDs) instead of semi-conductive quantum dots for bioimaging application. The as-derived CDs possessing down and up-conversion photoluminescence features were obtained from carrot juice by commonly used hydrothermal treatment. The corresponding physiochemical and optical properties were investigated by electron microscopy, fluorescent spectrometry, and other spectroscopic methods. The...
610.

Carbon rich fly ash and their nanostructures

Numan Salah, Sami S. Habib, Zishan H. Khan, Ahmed Alshahrie, Adnan Memic, Attieh A. Al-ghamdi 한국탄소학회 Carbon Letters 9 Pages

한국탄소학회 Carbon Letters 2016, Vol.19 3 23-31 (9 pages)

Numan Salah, Sami S. Habib, Zishan H. Khan, Ahmed Alshahrie, Adnan Memic, Attieh A. Al-ghamdi 저
...
- 3,000원
Carbon rich fly ash was recently reported to have compositions that are ideal for use as a precursor and catalyst for carbon nanotube growth. This fly ash powder is mostly composed of pure carbon, predominantly present as sp2. In this work, the effect of sonication time on the morphology and structural properties of carbon rich fly ash particles is reported. The obtained results show that ultrasound treatment is an effective tool for producing ultrafine particles/fragments with higher porosity,...

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