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41.

Creativity, Leadership, and a Challenge for East Asian Education

Roger C. Shouse 한국교육행정학회 교육행정학연구 12 Pages

한국교육행정학회 교육행정학연구 2012, 제 30권 제 2호 11 253-264 (12 pages)

Roger C. Shouse 저
...
- 4,100원
42.

월경 전 여성 청소년들의 골밀도 특성

김도연, 윤병곤 한국웰니스학회 한국웰니스학회지 13 Pages

한국웰니스학회 한국웰니스학회지 2012, 제 7권 1호 23 243-255 (13 pages)

김도연, 윤병곤 저
...
- 4,200원
골밀도 특성에 관한 연구는 문헌에 많이 발표 되어 있으며, 이러한 특성에 영향을 미치는 여러가지 다양한 요인들에 대한 내용도 다방면의 연구를 통해 알려졌다. 유전과 잘못된 식습관, 칼슘과 마그네슘의 보충상태, 천식치료를 위한 albuterol의 복용 등은 골밀도의 매개 변수에 많은 영향을 미친다. 또한 골의 크기는 무게에 대한 골의 저항이 골의 지름의 크기에 관련이 크기 때문에 골의 저항력에 매우 중요한 영향을 미친다. 특히, 폐경은 골밀도의 빠른 감소를 가져오는 결과가 되는 순환 에스트로겐의 수준이 낮아지는 원인이...
43.

어깨 불안정성에 대한 고찰

김종선, 박진국, 장석암 한국웰니스학회 한국웰니스학회지 9 Pages

한국웰니스학회 한국웰니스학회지 2007, 제 2권 2호 5 31-39 (9 pages)

김종선, 박진국, 장석암 저
...
- 3,000원
견관절부(shoulder joint)는 우리몸에서 관절운동 이 가장 큰 부분이며, 이러한 큰 관절 움직임 때문 에 넓은 범위에서 팔(arm)을 자연스럽게 사용할 수 있다(전재명, 1996). 이렇게 큰 관절 움직임 때문에 스포츠 경기시 팔의 움직임이 많아지게 되며, 이러 한 팔의 움직임이 경기 승패를 좌우 할 수 있기 때문에 선수들은 통증을 참고 무리한 동작을 하여 손상을 입는 경우가 많다(Quillen et al., 2004).
44.

EMI shielding effectiveness and mechanical properties of MWCNTs-reinforced biodegradable epoxy matrix composites

Yoon-Ji Yim, Dong Chul Chung, Soo-Jin Park 한국탄소학회 Carbon Letters 6 Pages

한국탄소학회 Carbon Letters 2017, Vol.22 4 36-41 (6 pages)

Yoon-Ji Yim, Dong Chul Chung, Soo-Jin Park 저
...
- 3,000원
Biodegradable epoxy (B-epoxy) was prepared from diglycidyl ether of bisphenol A and epoxidized linseed oil. The mechanical properties of B-epoxy composites reinforced with multi-walled carbon nanotubes (MWCNTs/B-epoxy) were examined by employing dynamic mechanical analysis, critical stress intensity factor (KIC) tests, and impact strength tests. The electromagnetic interference shielding effectiveness (EMI-SE) of the composites was evaluated using reflection and absorption methods. Mechanical...
45.

Effects of maleic anhydride content on mechanical properties of carbon fibers-reinforced maleic anhydride-grafted-polypropylene matrix composites

Hyun-Il Kim, Woong Han, Woong-Ki Choi, Soo-Jin Park, Kay-Hyeok An, Byung-Joo Kim 한국탄소학회 Carbon Letters 8 Pages

한국탄소학회 Carbon Letters 2016, Vol.20 6 39-46 (8 pages)

Hyun-Il Kim, Woong Han, Woong-Ki Choi, Soo-Jin Park, Kay-Hyeok An, Byung-Joo Kim 저
...
- 3,000원
In this work, the effects of maleic anhydride (MA) content on mechanical properties of chopped carbon fibers (CFs)-reinforced MA-grafted-polypropylene (MAPP) matrix composites. A direct oxyfluorination on CF surfaces was applied to increase the interfacial strength between the CFs and MAPP matrix. The mechanical properties of the CFs/MAPP composites are likely to be different in terms of MA content. Surface characteristics were observed by scanning electron microscope, Fourier transform infrared...
46.

Effects of electrochemical oxidation of carbon fibers on interfacial shear strength using a micro-bond method

Dong-Kyu Kim, Kay-Hyeok An, Yun Hyuk Bang, Lee-Ku Kwac, Sang-Yub Oh, Byung-Joo Kim 한국탄소학회 Carbon Letters 8 Pages

한국탄소학회 Carbon Letters 2016, Vol.19 4 32-39 (8 pages)

Dong-Kyu Kim, Kay-Hyeok An, Yun Hyuk Bang, Lee-Ku Kwac, Sang-Yub Oh, Byung-Joo Kim 저
...
- 3,000원
In this work, we studied the effects of electrochemical oxidation treatments of carbon fibers (CFs) on interfacial adhesion between CF and epoxy resin with various current densities. The surface morphologies and properties of the CFs before and after electrochemical-oxidation-treatment were characterized using field emission scanning electron microscopy, atomic force microscopy, Fourier transform infrared spectroscopy, X-ray photoelectron spectroscopy, and single-fiber contact angle. The...
47.

Phenylethynyl-terminated polyimide, exfoliated graphite nanoplatelets, and the composites: an overview

Donghwan Cho, Lawrence T. Drzal 한국탄소학회 Carbon Letters 11 Pages

한국탄소학회 Carbon Letters 2016, Vol.19 1 1-11 (11 pages)

Donghwan Cho, Lawrence T. Drzal 저
...
- 4,000원
well as the dynamic mechanical properties of carbon/BMI composites, are discussed. Reports on the thermal expansion behavior of intercalated graphite flake, and the effects of exfoliated graphite nanoplatelets (xGnP) on the properties of PETI-5 matrix composites are also reviewed. The dynamic mechanical and thermal properties and the electrical resistivity of xGnP/PETI-5 composites are characterized. The effect of liquid rubber amine-terminated poly(butadiene-co-acrylonitrile) (ATBN)-coated xGnP...
48.

Cellulose-based carbon fibers prepared using electron-beam stabilization

Min Il Kim, Mi-Seon Park, Young-Seak Lee 한국탄소학회 Carbon Letters 6 Pages

한국탄소학회 Carbon Letters 2016, Vol.18 9 56-61 (6 pages)

Min Il Kim, Mi-Seon Park, Young-Seak Lee 저
...
- 3,000원
Cellulose fibers were stabilized by treatment with an electron-beam (E-beam). The properties of the stabilized fibers were analyzed by scanning electron microscopy, Fourier transform infrared spectroscopy, X-ray photoelectron spectroscopy, and thermogravimetric analysis. The E-beam-stabilized cellulose fibers were carbonized in N₂ gas at 800°C for 1 h, and their carbonization yields were measured. The structure of the cellulose fibers was determined to have changed to hemicellulose and...
49.

A review: role of interfacial adhesion between carbon blacks and elastomeric materials

Min-Joo Kang, Young-Jung Heo, Fan-Long Jin, Soo-Jin Park 한국탄소학회 Carbon Letters 10 Pages

한국탄소학회 Carbon Letters 2016, Vol.18 1 1-10 (10 pages)

Min-Joo Kang, Young-Jung Heo, Fan-Long Jin, Soo-Jin Park 저
...
- 3,000원
Carbon blacks (CBs) have been widely used as reinforcing materials in advanced rubber composites. The mechanical properties of CB-reinforced rubber composites are mostly controlled by the extent of interfacial adhesion between the CBs and the rubber. Surface treatments are generally performed on CBs to introduce chemical functional groups on its surface. In this study, we review the effects of various surface treatment methods for CBs. In addition, the preparation and properties of CB-reinforced...
50.

Flexural properties, interlaminar shear strength and morphology of phenolic matrix composites reinforced with xGnP-coated carbon fibers

Jong Kyoo Park, Jae Yeol Lee, Lawrence T. Drzal, Donghwan Cho 한국탄소학회 Carbon Letters 6 Pages

한국탄소학회 Carbon Letters 2016, Vol.17 No.1 5 33-38 (6 pages)

Jong Kyoo Park, Jae Yeol Lee, Lawrence T. Drzal, Donghwan Cho 저
...
- 3,000원
In the present study, exfoliated graphite nanoplatelets (xGnP) with different particle sizes were coated onto polyacrylonitrile-based carbon fibers by a direct coating method. The flexural properties, interlaminar shear strength, and the morphology of the xGnP-coated carbon fiber/phenolic matrix composites were investigated in terms of their longitudinal flexural strength and modulus, interlaminar shear strength, and by optical and scanning electron microscopic observations. The results were...

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