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41.

성인들의 코로나 감염으로 인한 사회적 낙인에 대 한 두려움과 삶의 질 변화, 코로나-19 불안의 관계: 지각된 상황 통제감의 매개효과

박희진, 김민선, 김세희, 송가람 한국심리치료학회 한국심리치료학회지 24 Pages

한국심리치료학회 한국심리치료학회지 2021, 제 13권 제 2호 3 39-62 (24 pages)

박희진, 김민선, 김세희, 송가람 저
...
- 5,300원
본 연구의 목적은 코로나-19 감염으로 인해 사람들이 경험하는 사회적 낙인에 대한 두려움과 삶의 질 변화, 불안 의 관계를 살펴보고 두 심리적 변인의 관계를 설명할 수 있는 매개변인을 탐색적으로 살펴보는 것이다. 이를 위 해, 사회적 낙인에 대한 두려움과 코로나-19로 인한 삶의 질 변화, 불안의 관계를 지각된 상황 통제감이 매개하는 모형을 설정하고, 모형의 적합성과 각 변인들의 관련성을 살펴보았다. 연구를 위해 300명의 성인들을 모집하였으 며 성별은 남성 148명(49.3%), 여성 152(50.7%), 평균 연령은...
42.

A Comparison of Three Bayesian Point Estimates for Cross-Classified Multiple Membership Growth Curve Modeling

Chung Hyewon, Jeon Hyeonjeong, Park Soyoung 한국교육학회 교육학연구 26 Pages

한국교육학회 교육학연구 2021, 59권 7호 7 167-192 (26 pages)

Chung Hyewon, Jeon Hyeonjeong, Park Soyoung 저
...
- 5,500원
This simulation study evaluated parameter recovery in cross-classified multiple membership growth curve modeling under a variety of manipulated conditions, including prior distributions (inverse Wishart and uniform distributions), number of measurement occasions (3, 5), number of groups (30, 50, 100), average group size (20, 40), and non-pure hierarchical data rates (20%, 40%). Three Bayesian point estimates were compared: the posterior mean, the posterior median, and the posterior mode. With...
43.

A Simulation Study for Examining Roles of Sampling Weight in Multilevel Analysis with data from a Complex Survey Design

Jung Hyekyung, Park In-Yong 한국교육학회 교육학연구 21 Pages

한국교육학회 교육학연구 2021, 59권 7호 4 85-105 (21 pages)

Jung Hyekyung, Park In-Yong 저
...
- 5,000원
This study was motivated by the National Assessment of Educational Achievement (NAEA) involving a complex survey design for sampling. The goal of the study was to explore the benefit of weighted analysis in multilevel modeling. Large-scale data such as the NAEA data are often analyzed in multilevel analyses to reflect the nested data structure. A simulation study was conducted incorporating different conditions. Multilevel analysis results were compared without weights, with basic design...
44.

대학생 세계이해 논술형 평가도구 개발 및 타당화

함은혜, 심우정, 박소영 한국교육학회 교육학연구 32 Pages

한국교육학회 교육학연구 2021, 59권 5호 5 107-138 (32 pages)

함은혜, 심우정, 박소영 저
...
- 6,100원
이 연구는 대학생의 세계이해를 평가하기 위한 논술형 평가도구를 개발하고 타당화하기 위하여 수행되었다. 세계이해는 세계의 다양한 문화, 경제, 정치 등의 이슈에 관심을 가지고 상호의존적 공동체 특성을 인식하여 국제이슈를 해석·탐구할 수 있는 능력이다. 이에, 글로벌 환경에서 국가 혹은 지역 간 이해관계나 가치가 충돌하는 상황을 분석하도록 논술형 과제를 설계하였다. 대학생 340명이 논술형 과제 수행에 참여하였으며, 개발된 채점기준표에 따라 11명의 채점자가 채점하였다. 산출된 자료를 다국면 Rasch 모형을 활용하여...
45.

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...
46.

The effect of the spinning conditions on the structure of mesophase pitch-based carbon fibers by Taguchi method

Zhao Jiang, Ting Ouyang, Xiangdong Yao, Youqing Fei 한국탄소학회 Carbon Letters 10 Pages

한국탄소학회 Carbon Letters 2016, Vol.19 11 89-98 (10 pages)

Zhao Jiang, Ting Ouyang, Xiangdong Yao, Youqing Fei 저
...
- 3,000원
Taguchi’s experimental design was employed in the melt spinning of molten mesophase pitch to produce carbon fibers. The textures of the obtained carbon fibers were radial with varied crack angles, as observed by scanning electron microscopy and polarized optical imaging. The diameter, crack angle, preferred orientation, and tensile modulus of the produced samples were examined to investigate the influence of four spinning variables. The relative importance of the variables has been emphasized...
47.

Photocatalytic degradation and antibacterial investigation of nano synthesized Ag₃VO₄ particles @PAN nanofibers

Prem Singh Saud, Zafar Khan Ghouri, Bishweshwar Pant, Taehee An, Joong Hee Lee, Mira Park, Hak-Yong Kim 한국탄소학회 Carbon Letters 7 Pages

한국탄소학회 Carbon Letters 2016, Vol.18 5 30-36 (7 pages)

Prem Singh Saud, Zafar Khan Ghouri, Bishweshwar Pant, Taehee An, Joong Hee Lee, Mira Park, Hak-Yong Kim 저
...
- 3,000원
Well-dispersed Ag₃VO₄ nanoparticles @polyacrylonitrile (PAN) nanofibers were synthesized by an easily controlled, template-free method as a photo-catalyst for the degradation of methylene blue. Their structural, optical, and photocatalytic properties have been studied by X-ray diffraction, transmission electron microscopy, field-emission scanning electron microscopy equipped with rapid energy dispersive analysis of X-ray, photoluminescence, and ultraviolet?visible spectroscopy. The...
48.

Mechanical interfacial adhesion of carbon fibers-reinforced polarized-polypropylene matrix composites: effects of silane coupling agents

Woong-Ki Choi, Hyun-Il Kim, Shin-Jae Kang, Young Sil Lee, Jong Hun Han, Byung-Joo Kim 한국탄소학회 Carbon Letters 6 Pages

한국탄소학회 Carbon Letters 2016, Vol.17 No.1 12 79-84 (6 pages)

Woong-Ki Choi, Hyun-Il Kim, Shin-Jae Kang, Young Sil Lee, Jong Hun Han, Byung-Joo Kim 저
...
- 3,000원
49.

Effects of cross-linking methods for polyethylene-based carbon fibers: review

Kwan-Woo Kim, Hye-Min Lee, Jeong-Hun An, Byoung-Suhk Kim, Byung-Gak Min, Shin-Jae Kang, Kay-Hyeok An, Byung-Joo Kim 한국탄소학회 Carbon Letters 24 Pages

한국탄소학회 Carbon Letters 2015, Vol.16 No.3 2 147-170 (24 pages)

Kwan-Woo Kim, Hye-Min Lee, Jeong-Hun An, Byoung-Suhk Kim, Byung-Gak Min, Shin-Jae Kang, Kay-Hyeok An, Byung-Joo Kim 저
...
- 5,300원
In recent decades, there has been an increasing interest in the use of carbon fiber reinforced plastic (CFRP) in aerospace, renewable energy and other industries, due to its low weight and relatively good mechanical properties compared with traditional metals. However, due to the high cost of petroleum-based precursors and their associated processing costs, CF remains a specialty product and as such has been limited to use in high-end aerospace, sporting goods, automotive, and specialist...
50.

Effects of comonomer with carboxylic group on stabilization of high molecular weight polyacrylonitrile nanofibrous copolymers

Danyun Lei, Kesavan Devarayan1, Xiang-Dan Li, Woong-Ki Choi, Min-Kang Seo and Byoung-Suhk Kim 한국탄소학회 Carbon Letters 5 Pages

한국탄소학회 Carbon Letters 2014, Vol.15 No.4 9 290-294 (5 pages)

Danyun Lei, Kesavan Devarayan1, Xiang-Dan Li, Woong-Ki Choi, Min-Kang Seo and Byoung-Suhk Kim 저
...
- 1,500원
New precursors, poly(acrylonitrile-co-crotonic acid) (poly(AN-CA)) and poly(acrylonitrile-co-itaconic acid-co-crotonic acid) (poly(AN-IA-CA)) copolymers, for the preparation of carbon fibers, were explored in this study. The effects of comonomers with acidic groups, such as crotonic acid (CA) and/or itaconic acid (IA), on the stabilization of nanofibrous polyacrylonitrile (PAN) copolymers were studied. The extent of stabilization, evaluated by Fourier transform infrared spectroscopy, revealed...

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