학지사 뉴논문

총 1,225건 검색

본문검색 결과만 보기

정확도순

최신순

등재순

발행기간

전체
최근 1년
최근 3년
직접입력

적용하기

본문검색

포함

제외

10개씩

911.

유치원 교사의 과학교수능력 향상을 위한 학습공동체 모형 개발

조부경, 고영미 한국교육학회 교육학연구 30 Pages

한국교육학회 교육학연구 2006, 44권 2호 11 267-296 (30 pages)

조부경, 고영미 저
...
- 5,900원
본 연구는 유치원 교사의 과학교수능력을 향상하기 위한 학습공동체 모형을 개발하기 위한 것이었다. 이를 위하여 학습공동체 관련 문헌 및 국내외 과학교사교육 프로그램을 고찰하여 모형개발의 이론적 준거를 도출하였다. 모형개발의 실제적 준거를 위해서는 \'과학교수 능력 향상을 위한 학습공동체 요구 조사\' 질문지를 작성하여 4개 기관에서 주관하는 연수에 참여한 유치원교사를 대상으로 질문지를 배부, 회수한뒤, 응답한 329명의 학습공동체에 대한 요구를 분석하였다. 이러한 이론적, 실제적 준거를 토대로 유치원 교사의...
912.

한국 중등교육의 수월성과 평등성의 조화를 위한 과제

김경근 한국교육학회 교육학연구 21 Pages

한국교육학회 교육학연구 2006, 44권 1호 1 1-21 (21 pages)

김경근 저
...
- 5,000원
현재 한국사회에서 관행화되어 있는 학업성취 중심의 수월성 추구는 시대적 적합성 을 결여하고 있는 것으로 판단된다. 또한 그것은 필연적으로 평등성 추구와 끊임없는 갈등을 초래하게 되어 있다. 따라서 이 시대가 요구하는 진정한 수월성을 구현하고 평 등성과의 조화도 이루어내기 위해서는 기존 교육패러다임이 획기적으로 바뀔 필요가 있다. 특히 학업성취 중심의 수월성 추구와 획일적 교육기회 보장에 초점을 맞춘 평등 성 추구는 지식기반사회에서 요구되는 다원적이고 수평적인 능력관에 조응하는 방향으 로 모두 질적인...
913.

Green synthesis of reduced graphene oxide using ball milling

G. Calder?n-Ayala, M. Cortez-Valadez, P. G. Mani-Gonzalez, R. Britto Hurtado, J. I. Contreras-Rasc?n, R. C. Carrillo-Torres 한국탄소학회 Carbon Letters 5 Pages

한국탄소학회 Carbon Letters 2017, Vol.21 12 93-97 (5 pages)

G. Calder?n-Ayala, M. Cortez-Valadez, P. G. Mani-Gonzalez, R. Britto Hurtado, J. I. Contreras-Rasc?n, R. C. Carrillo-Torres 저
...
- 1,500원
Today, finding superior methods for synthesis of graphene oxide (GO) and reduced graphene oxide (rGO) from commercial graphite, is still a challenge. The global industry requires the use of synthesis methods that are price-competitive and also use processes that are environmentally compatible. GO is a substrate used for several chemical transformations, including its reduction to related materials, such as rGO and graphene. The rGO has been used recently to increase catalytic activity in the...
914.

Effect of carbonization temperature on crystalline structure and properties of isotropic pitch-based carbon fiber

Jung Dam Kim, Jae-Seung Roh, Myung-Soo Kim 한국탄소학회 Carbon Letters 10 Pages

한국탄소학회 Carbon Letters 2017, Vol.21 6 51-60 (10 pages)

Jung Dam Kim, Jae-Seung Roh, Myung-Soo Kim 저
...
- 3,000원
Isotropic pitch-based fibers produced from coal tar pitch with the melt-blowing method were carbonized at temperatures ranging from 800 to 1600oC to investigate their crystalline structure and physical properties as a function of the carbonization temperature. The in-plane crystallite size (La) of the carbonized pitch fiber from X-ray diffraction increased monotonously by increasing the carbonization temperature resulting in a gradual increase in the electrical conductivity from 169 to 3800...
915.

Activating needle coke to develop anode catalyst for direct methanol fuel cell

Young Hun Park, Ui-Su Im, Byung-Rok Lee, Dong-Hyun Peck, Sang-Kyung Kim, Young Woo Rhee, Doo-Hwan Jung 한국탄소학회 Carbon Letters 6 Pages

한국탄소학회 Carbon Letters 2016, Vol.20 7 47-52 (6 pages)

Young Hun Park, Ui-Su Im, Byung-Rok Lee, Dong-Hyun Peck, Sang-Kyung Kim, Young Woo Rhee, Doo-Hwan Jung 저
...
- 3,000원
Physical and electrochemical qualities were analyzed after KOH activation of a direct methanol fuel cell using needle coke as anode supporter. The results of research on support loaded with platinum-ruthenium suggest that an activated KOH needle coke container has the lowest onset potential and the highest degree of catalyst activity among all commercial catalysts. Through an analysis of the CO stripping voltammetry, we found that KOH activated catalysis showed a 21% higher electrochemical...
916.

Thermoelectric properties of carbonaceous solids

Francesco Miccio 한국탄소학회 Carbon Letters 5 Pages

한국탄소학회 Carbon Letters 2016, Vol.19 14 107-111 (5 pages)

Francesco Miccio 저
...
- 1,500원
917.

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)

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 저
...
- 3,000원
As 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...
918.

Cu²? ion reduction in wastewater over RDF-derived char

Hyung Won Lee, Rae-su Park, Sung Hoon Park, Sang-Chul Jung, Jong-Ki Jeon, Sang Chai Kim, Jin Do Chung, Won Geun Choi, Young-Kwon Park 한국탄소학회 Carbon Letters 7 Pages

한국탄소학회 Carbon Letters 2016, Vol.18 8 49-55 (7 pages)

Hyung Won Lee, Rae-su Park, Sung Hoon Park, Sang-Chul Jung, Jong-Ki Jeon, Sang Chai Kim, Jin Do Chung, Won Geun Choi, Young-Kwon Park 저
...
- 3,000원
Refuse-derived fuel (RDF) produced using municipal solid waste was pyrolyzed to produce RDF char. For the first time, the RDF char was used to remove aqueous copper, a representative heavy metal water pollutant. Activation of the RDF char using steam and KOH treatments was performed to change the specific surface area, pore volume, and the metal cation quantity of the char. N2 sorption, Inductively Coupled Plasma-Atomic Emission Spectrometer (ICP-AES), and Fourier transform infrared spectroscopy...
919.

A review: methane capture by nanoporous carbon materials for automobiles

Pil-Seon Choi, Ji-Moon Jeong, Yong-Ki Choi, Myung-Seok Kim, Gi-Joo Shin, Soo-Jin Park 한국탄소학회 Carbon Letters 11 Pages

한국탄소학회 Carbon Letters 2016, Vol.17 No.1 3 18-28 (11 pages)

Pil-Seon Choi, Ji-Moon Jeong, Yong-Ki Choi, Myung-Seok Kim, Gi-Joo Shin, Soo-Jin Park 저
...
- 4,000원
alternative fuel for vehicles. CH4 storage involves many technologies, among which, adsorption processes such as processes using porous adsorbents are regarded as an important green and economic technology. It is very important to develop highly efficient adsorbents to realize techno-economic systems for CH4 adsorption and storage. In this review, we summarize the nanomaterials being used for CH4 adsorption, which are divided into non-carbonaceous (e.g., zeolites, metal-organic frameworks, and...
920.

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
...
- 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...

한주간 이슈검색어