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The construction of second generation wavelet-based multivariable finite elements for multiscale analysis of beam problems
Wang. Youming, Wu. Qing, Wang. Wenqing 테크노프레스 Structural engineering and mechanics : An international journal 17 Pages
테크노프레스 Structural engineering and mechanics : An international journal 2014, Vol.50 No.5 679-695 (17 pages)
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Effects of thermoforming on the physical and mechanical properties of thermoplastic materials for transparent orthodontic aligners
Jeong-Hyun Ryu, Jae-Sung Kwon, Heng Bo Jiang, Jung-Yul Cha, Kwang-Mahn Kim 대한치과교정학회 The Korean Journal of Orthodontics 10 Pages
대한치과교정학회 The Korean Journal of Orthodontics 2018, 제 48권 제 5호 5 316-325 (10 pages)
materials for transparent orthodontic aligners Objective: The aim of this systematic multiscale analysis was to evaluate the effects of thermoforming on the physical and mechanical properties of thermoplastic materials used to fabricate transparent orthodontic aligners (TOAs). Methods: Specimens were fabricated using four types of thermoplastic materials with different thicknesses under a... Objective: The aim of this systematic multiscale analysis was to evaluate the effects of thermoforming on the physical and mechanical properties of thermoplastic materials used to fabricate transparent orthodontic aligners (TOAs). Methods: Specimens were fabricated using four types of thermoplastic materials with different thicknesses under a thermal vacuum. Transparency, water absorption and solubility, surface hardness, and the results of three-point bending and tensile tests were evaluated... -
Hydrogen Peroxide Prompted Lignification Affects Pathogenicity of Hemi-biotrophic Pathogen Bipolaris sorokiniana to Wheat
Ajit Poudel, Sudhir Navathz, Ramesh Chand, Vinod K. Mishra, Pawan K. Singh, Arun K. Joshi 한국식물병리학회 The Plant Pathology Journal 14 Pages
한국식물병리학회 The Plant Pathology Journal 2019, 35권 4호 1 287-300 (14 pages)
as a cumulative effect of the resistance genes (Eisa et al., 2013), but little has been known regarding the biochemical com- ponents involved (Yusuf et al., 2016). Among the structural and biochemical resistance factors, lignin is the most important (Boudet, 2000) and lignifica- tion in cells plays a crucial role through programmed depo- sition around the pathogen penetration sites by creating... to spot blotch in wheat. We used cluster analysis to separate the resistant and susceptible genotypes by phenotypic and biochemical traits. H2O2 associated lignin production significantly reduced the number of appressoria and penetration pegs. We visualized the effect of lignin in disease resistance using differential histochemical staining of tissue from resistant and susceptible genotypes, which shows the variable accumulation of hydrogen peroxide and lignin around penetration sites. -
남북한 교사의 역할 인식 프레임 비교
김정원, 김도훈, 김지수, 이슬기 한국교육사회학회 교육사회학연구 31 Pages
한국교육사회학회 교육사회학연구 2016, 제 26권 제 3호 3 59-89 (31 pages)
do and what they are doing between South and North Korea which have been experienced social structural change since 1990’s. The role of teachers was defined as the set of expected behaviors by the social status of teachers or their behaviors coping with social expectations. To find out the subjective perception of teachers’ role, we held two focus group discussions in which teachers from the... 본 연구는 1990년대 이후 큰 사회적 변화를 경험한 남북한에서 과거와 현재, 그리고 당위 와 현실 측면 교사들의 역할 인식 프레임이 어떻게 다른지를 비교 분석해 보고자 한 것이 다. ‘교사라는 지위와 관련하여 기대되는 활동 혹은 그에 대처하는 활동의 집합체’로 교사 역할을 정의하는 가운데 관련한 교사 인식 프레임을 분석하기 위해 남한 교사, 북한 교사가 각각 참여하는 집담회를 진행하고 그 결과를 의미망 분석법으로 분석하였다. 연구 결과, 남 한 교사들은 학생들에게 ‘지식’을 제공하는 전통적 의미의 교사 역할을 과거... -
Effect of the surface modification using MWCNTs with different L/D by two different methods of deposition on the IFSS of single carbon fiber-epoxy resin composite
Minerva L. Herrera-Sosa, Alex Valadez-Gonz?lez, Humberto V?zquez-Torres, Pierre G. Mani-Gonz?lez, Pedro J. Herrera-Franco 한국탄소학회 Carbon Letters 10 Pages
한국탄소학회 Carbon Letters 2017, Vol.24 3 18-27 (10 pages)
Chou TW. Carbon nanotube/carbon fber hybrid multiscale composites. J Appl Phys, 91, 6034 (2002). https://doi.org/10.1063/1.1466880. [3] Bekyarova E, Thostenson ET, Yu A, Kim H, Gao J, Tang J, Hahn HT, Chou TW, Itkis ME, Haddon RC. Multiscale carbon nanotube: carbon fber reinforcement for advanced epoxy composites. Lang- muir, 23, 3970 (2007). https://doi.org/10.1021/la062743p. ..PAGE:10 Efect... Multiwall carbon nanotubes (MWCNT) with two different (L/D) aspect ratios (7±2 μm/140±30 nm and 0.5?2 μm/8?15 nm) were surface treated using nitric acid (HNO3) and polyethyleneimine (PEI) prior to their deposition on carbon fibers (CF). Before the hierarchical reinforcement with CF-MWCNT, the CFs were treated with 3-glycidoxypropyltrimethoxysilane, a coupling agent (Z6040) and with poly(amidoamine) (PAMAM) a dendrimer containing an ethylenediamine core and amine surface groups. The MWCNT... -
Mechanical properties of epoxy composites reinforced with ammonia-treated graphene oxides
Mi-Seon Park, Sangmin Lee, Young-Seak Lee 한국탄소학회 Carbon Letters 7 Pages
한국탄소학회 Carbon Letters 2017, Vol.21 1 1-7 (7 pages)
as fuorine and nitrogen [14]. These results further confrmed that nitrogen functional groups had been in- troduced onto the surfaces of the GO samples, supporting the results obtained in the XPS analysis. 3.2. Structural properties of the aminated GO samples XRD analysis was performed to investigate the structural changes that occurred in the GO as a result of the ammonia treatment. After... used to modify GO. Nitrogen functional groups were introduced on the GO surfaces without significant structural changes. The ammonia-treated GO-based epoxy composites exhibited interesting changes in their mechanical properties related to the presence of nitrogen functional groups, particularly amine (C-NH2) groups on the GO surfaces. The highest tensile and impact strength values were 42.1 MPa and 12.3 J/m, respectively, which were observed in an epoxy composite prepared with GO treated with a...