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2041.

Preparation of carbon discs using petroleum-based binder pitch reformed with carbon black

Sangmin Lee, Kyung Hoon Kim, Young-Seak Lee 한국탄소학회 Carbon Letters 4 Pages

한국탄소학회 Carbon Letters 2017, Vol.23 13 84-87 (4 pages)

Sangmin Lee, Kyung Hoon Kim, Young-Seak Lee 저
...
- 1,500원
a carbon fibers, graphite brushes, aluminum engineering and binders, because carbon materials have high specific strength, high conductivity, excellent thermal shock resistance, and other favorable properties [1-4]. These carbon materials are prepared from various precursors, such as polyacrylonitrile (PAN), phenolic resins and pitches. Among these precursors, pitches are more economical than PAN and phenol resin, and it is possible to control the pitch properties according to the manufacturing...
2042.

Fabrication of carbon fiber SMC composites with vinyl ester resin and effect of carbon fiber content on mechanical properties

Haksung Lee, Mongyoung Huh, Jaeyoung Yoon, Dasom Lee, Seonyul Kim, Shinjae Kang 한국탄소학회 Carbon Letters 4 Pages

한국탄소학회 Carbon Letters 2017, Vol.22 11 101-104 (4 pages)

Haksung Lee, Mongyoung Huh, Jaeyoung Yoon, Dasom Lee, Seonyul Kim, Shinjae Kang 저
...
- 1,500원
Fiber reinforced composites are being used in the automotive industry and other manufacturing fields. Their properties, including high specific stiffness, strength and weight reduction make fiber composite materials an attractive replacement for metal components. The development of composites like carbon fiber reinforced plastic and related production technologies have contributed to the increasing application of fiber composite materials. Many new components have recently been adapted,...
2043.

Comparative numerical evaluation for the low velocity impact behavior of T300 and T800 composite system

Jae-Seok Choi, Heung Soap Choi, Soo-Jin Park, Myung Kyun Park 한국탄소학회 Carbon Letters 7 Pages

한국탄소학회 Carbon Letters 2017, Vol.22 9 89-95 (7 pages)

Jae-Seok Choi, Heung Soap Choi, Soo-Jin Park, Myung Kyun Park 저
...
- 3,000원
fiber reinforced polymer (CFRP) composites have been used for many decades for extreme light weight design purposes in various areas, such as the aerospace industry, automobiles, sports goods and etc. because they provide the advantages of high specific strength and high rigidity [1]. In particular, the fuselage and wings of various aircraft, as well as the load bearing structures and components of mechanical and civil engineering systems are currently being manufactured with CFRP. However, even...
2044.

The effects of carbon coating onto graphite filler on the structure and properties of carbon foams

Ji-Hyun Kim, Do Young Kim, Young-Seak Lee 한국탄소학회 Carbon Letters 5 Pages

한국탄소학회 Carbon Letters 2017, Vol.21 16 111-115 (5 pages)

Ji-Hyun Kim, Do Young Kim, Young-Seak Lee 저
...
- 1,500원
the mechanical properties of metal-based heat sink materials are difficult to control at temperatures over 550°C [2,3]. Thus, CFms are actively investigated as heat sink materials because of their good properties, such as high thermal stability, high thermal/electrical conductivity, low density, high porosity and high specific surface area [4,5]. CFms are suitable materials for applications in phase-change materials, such as in latent heat thermal energy storage and lithium-ion batteries [6-9].
2045.

Adsorption capability of activated carbon synthesized from coconut shell

Md Shariful Islam, Bee Chin Ang, Samira Gharehkhani, Amalina Binti, Muhammad Afifi 한국탄소학회 Carbon Letters 9 Pages

한국탄소학회 Carbon Letters 2016, Vol.20 1 1-9 (9 pages)

Md Shariful Islam, Bee Chin Ang, Samira Gharehkhani, Amalina Binti, Muhammad Afifi 저
...
- 3,000원
Activated carbon was synthesized from coconut shells. The Brunauer, Emmett and Teller surface area of the synthesized activated carbon was found to be 1640 m2/g with a pore volume of 1.032 cm3/g. The average pore diameter of the activated carbon was found to be 2.52 nm. By applying the size-strain plot method to the X-ray diffraction data, the crystallite size and the crystal strain was determined to be 42.46 nm and 0.000489897, respectively, which indicate a perfect crystallite structure. The...
2046.

Microstructural changes of polyacrylonitrile-based carbon fibers (T300 and T700) due to isothermal oxidation (1): focusing on morphological changes using scanning electron microscopy

Seong-Moon Oh, Sang-Min Lee, Dong-Su Kang, Jae-Seung Roh 한국탄소학회 Carbon Letters 6 Pages

한국탄소학회 Carbon Letters 2016, Vol.18 3 18-23 (6 pages)

Seong-Moon Oh, Sang-Min Lee, Dong-Su Kang, Jae-Seung Roh 저
...
- 3,000원
Polyacrylonitrile (PAN)-based carbon fibers have high specific strength, elastic modulus, thermal resistance, and thermal conductivity. Due to these properties, they have been increasingly widely used in various spheres including leisure, aviation, aerospace, military, and energy applications. However, if exposed to air at high temperatures, they are oxidized, thus weakening the properties of carbon fibers and carbon composite materials. As such, it is important to understand the oxidation...
2047.

Monolithic porous carbon materials prepared from polyurethane foam templates

Jo?o Pires, Andr? Janeiro, Filipe J. Oliveira, Alexandre C. Bastos, Mois?s L. Pinto 한국탄소학회 Carbon Letters 7 Pages

한국탄소학회 Carbon Letters 2016, Vol.18 2 11-17 (7 pages)

Jo?o Pires, Andr? Janeiro, Filipe J. Oliveira, Alexandre C. Bastos, Mois?s L. Pinto 저
...
- 3,000원
Mesoporosity was achieved through the use of soft templating with surfactant Pluronic F127, and macroporosity from the polyurethane foams was retained. Conditions to obtain high porosity materials were optimized. The best materials have high specific surface areas (380 and 582 m2 g?1, respectively) and high electrical conductivity, which make them good candidates for supports in sensors. These materials showed an almost linear dependence between the potential and the pH of aqueous solutions.
2048.

The effects of input-enhanced and output-enhanced grammar instruction on the learning of English verb tenses and relative clauses

Hwang, Hee Jeong 이화여자대학교 교과교육연구소 교과교육학연구 31 Pages

이화여자대학교 교과교육연구소 교과교육학연구 2014, 제 18권 3호 13 775-805 (31 pages)

Hwang, Hee Jeong 저
...
- 6,000원
improving low-proficiency learners' English knowledge about specific linguistic forms. The participants were 111 first-year Korean university students enrolled in an English conversation course. They were assigned to three groups; 35 students in the input-enhanced group (TIE), 33 in the output-enhanced group (DICT), and 45 in the control group (CG). English verb tenses and relative clauses were selected as the target structures. Pre- and post-tests were conducted to measure the effectiveness of...
2049.

MicroTom - A Model Plant System to Study Bacterial Wilt by Ralstonia solanacearum

한국식물병리학회 The Plant Pathology Journal 6 Pages

한국식물병리학회 The Plant Pathology Journal 2007, 23권 4호 3 239-244 (6 pages)

저
...
- 3,000원
molecular biology. To extend its utility as a model plant to study a plant - bacterial wilt system, we investigated the potential of the MicroTom as a host plant of bacterial wilt caused by Ralstonia solanacearum. We compared the disease progress on standard tomato and MicroTom by two inoculation methods, root dipping and soil drenching, using a race 1 strain GMI1000. Both methods caused the severe wilting on MicroTom comparable to commercial tomato plant, although initial disease development wa...
2050.

KNOWLEDGE ECONOMY PYRAMID: Transforming Knowledge Value in Increasing Productivity and Competitiveness

Octavian SERBAN 대외경제정책연구원 KIEP 연구보고서 256 Pages

대외경제정책연구원 KIEP 연구보고서 2018년호 49 1-256 (256 pages)

Octavian SERBAN 저

이 자료는 국가지식 제공기관과의 협약을 통해 무료로 제공되는 자료입니다.
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세계경제는 혁신, 창의력, 기업가 정신을 자극하는 귀중한 자원으로 지식을 활용하는 새로운 경제 모델을 필요로 한다. 생산성과 경쟁력을 강화함으로써 지속가능한 성장을 통한 사회복지를 실현할 수 있기 때문이다. 정책 입안자는 지식경제의 영역을 고려하여 생산성과 경쟁력 관련 새로운 공공정책을 수립하고 지식의 관점에서 개발정책을 관리할 수 있는 제도적 역량을 확립해야 한다. 지식경제피라미드(Knowledge Economy Pyramid) 모델은 교육, 연구, 기술, 비즈니스, 혁신, 정부 및 지역사회의 지식 생태계에 촉매 역할을 하며...

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