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Functionalization of Multi-walled Carbon Nanotube by Treatment with Dry Ozone Gas for the Enhanced Dispersion and Adhesion in Polymeric Composites
Jung-Hwan Kim , Byung Gil Min 한국탄소학회 Carbon Letters 6 Pages
한국탄소학회 Carbon Letters 2010, Vol.11 No.4 4 298-303 (6 pages)
up to 1.5 wt% mainly due to poor dispersion of MWNT in the PA6 matrix and poor adhesion between MWNT and PA6. Thus, it is considered that the agglomerates of raw MWNT in PA6, as seen in the FE-SEM image, act not as reinforcing agent but as defects. The composite with ozone treated MWNT, however, slightly increased with increasing of MWNT content presumably due to the improvement in dispersion of... -
Synthesis and characterization of carbon doped TiO₂ photocatalysts supported on stainless steel mesh by sol-gel method
JO. Tijani, OO. Fatoba, TC. Totito, WD. Roos, LF. Petrik 한국탄소학회 Carbon Letters 12 Pages
한국탄소학회 Carbon Letters 2017, Vol.22 6 48-59 (12 pages)
at a constant heating rate of 50ºC/min Fig. 2. High resolution scanning electron microscopy image of a cata- lyst prepared at 350ºC: (a) JT5 (1 h), (b) JT6 (2 h), (c) JT7 (3 h), (d) JT8 (4 h) at a constant heating rate of 50ºC/min. Fig. 3. High resolution scanning electron microscopy image of a cata- lyst prepared at 400ºC: (a) JT9 (1 h), (b) JT10 (2 h), (c) JT11 (3 h), (d) JT12 (4 h) at a... This study synthesized pure anatase carbon doped TiO₂ photocatalysts supported on a stainless steel mesh using a sol-gel solution of 8% polyacrylonitrile (PAN)/dimethylformamide (DMF)/TiCl₄. The influence of the pyrolysis temperature and holding time on the morphological characteristics, particle sizes and surface area of the prepared catalyst was investigated. The prepared catalysts were characterized by several analytical methods: high resolution scanning electron microscopy (HRSEM), energy... -
Superhydrophobic carbon-based materials: a review of synthesis, structure, and applications
Long-Yue Meng, Soo-Jin Park 한국탄소학회 Carbon Letters 16 Pages
한국탄소학회 Carbon Letters 2014, Vol.15 No.2 5 89-104 (16 pages)
ect: (a) lotus leaf and beads; (b) scanning electron mi- croscopy image of micropapillae present on the surface of a lotus leaf; (c) image of a water droplet on a lotus leaf (a); (d) structural diagram of micro- and nanostructure of a single micropapilla [43]. ..PAGE:3 Superhydrophobic Carbon-Based Materials 91 http://carbonlett.org In Eq. (3), r is equal to the ratio between the actual surface... Materials with appropriate surface roughness and low surface energy can form superhydrophobic surfaces, displaying water contact angles greater than 150°. Superhydrophobic carbon-based materials are particularly interesting due to their exceptional physicochemical properties. This review discusses the various techniques used to produce superhydrophobic carbon-based materials such as carbon fibers, carbon nanotubes, graphene, amorphous carbons, etc. Recent advances in emerging fields such as... -
Overlook of current chemical vapor deposition-grown large single-crystal graphene domains
Kyung Tae Park, Taehoon Kim, Chong Rae Park 한국탄소학회 Carbon Letters 11 Pages
한국탄소학회 Carbon Letters 2014, Vol.15 No.3 1 151-161 (11 pages)
c. Reprinted (adapted) with permission from [43]. Copyright 2011, American Chemical Society. (e) SEM image showing graphene preferentially nucleating along the rolling marks of Cu; the white arrow indicates the direction of the rolling marks. Reprinted with permission from [42]. Copyright 2011, Elsevier. Fig. 6. (a-c) Scanning electron microscope (SEM) images showing the di erence in the... Exceptional progress has been made with chemical vapor deposition (CVD) of graphene in the past few years. Not only has good monolayer growth of graphene been achieved, but large-area synthesis of graphene sheets has been successful too. However, the polycrystalline nature of CVD graphene is hampering further progress as graphene property degrades due to presence of grain boundaries. This review will cover factors that affect nucleation of graphene and how other scientists sought to obtain large... -
고속 다중 노출 영상을 이용한 골프공의 비행 요소 측정
김기현, 박현우, 주우석, 이동훈, 윤태수, Kim. Ki-Hyun, Park. Hyun-Woo, Ju. Woo-Suk, Lee. Dong-Hoon, Yun. Tae-Soo 한국멀티미디어학회 멀티미디어학회논문지 9 Pages
한국멀티미디어학회 멀티미디어학회논문지 2009, Vol.12 No.5 699-707 (9 pages)
최근 체감형 스포츠 게임이 늘어나면서 실제 사용자의 동작을 인식하는 연구가 활발히 진행 중이다. 그 중에서도 골프에 관한 연구가 활발하다. 본 논문에서는 고속 다중 노출 영상의 획득이 가능한 카메라를 이용하여 골프공의 비행데이터를 측정한다. 고속 다중 노출 이미지의 획득이 가능한 카메라는 촬영 시, 한 장의 이미지에 여러 번의 노출을 이용하여 영상을 획득 할 수 있으며, 획득한 영상은 영상처리과정을 통하여 촬영된 공의 위치를 측정한다. 계산된 골프공의 위치는 물리공식을 이용하여 골프공의 비행데이터인속도,... -
Isolation and In Vitro Culture of Vascular Endothelial Cells from Mice
ShinkyuChoi, JiAeeKim, KwanChangKim, SukHyoSuh 대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 8 Pages
대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 2015, Vol.19 No.1 6 35-42 (8 pages)
h. Bands were visualized by chem- iluminescence, and data collect ion and processing were per- formed using an LAS-3000 luminescent image analyzer and IMAGE GAUSE software (Fujifilm, Tokyo, Japan). RNA isolation and RT-PCR RNA isolation from cells and RT-PCR analysis for vWF expression performed using the RNeasy mini kit (Qiagen, Valencia, CA) and OneStep RT-PCR kit (Qiagen), according to the... In cardiovascular disorders, understanding of endothelial cell (EC) function is essential to elucidate the disease mechanism. Although the mouse model has many advantages for in vivo and in vitro research, efficient procedures for the isolation and propagation of primary mouse EC have been problematic. We describe a high yield process for isolation and in vitro culture of primary EC from mouse arteries (aorta, braches of superior mesenteric artery, and cerebral arteries from the circle of... -
Transforming Social Studies Teacher Education: Teaching Civics to Adult English Language Learners
Ashley Taylor Jaffee, Michelle D. Cude, Lisa Clark Schick 이화여자대학교 교과교육연구소 교과교육학연구 11 Pages
이화여자대학교 교과교육연구소 교과교육학연구 2016, 제 20권 3호 9 253-263 (11 pages)
a meaning, we can grab our phones and show them an image, because pictures are the same in every language. Tina discussed how she used multiple modes to scaffold Tomas’s understanding of a vocabulary word, iconic (Lucas & Villegas, 2010). By using discussion, written text, a mobile device, and visuals they were able to under- stand what this term meant in relation to their own con- texts and... As social studies teacher educators we have a responsibility to prepare future teachers who are globally aware, culturally and linguistically responsive, and pedagogically reflective. This study seeks to better understand how a collaborative practicum experience with a local immigrant English/Civics community program is preparing pre-service social studies teachers (PSSTs) for their future work with culturally and linguistically diverse (CLD) secondary school students by asking the following... -
경찰드론의 실종자 수색 임무장비 도입에 관한 연구
권희춘, 임한성 한국경호경비학회 시큐리티연구 24 Pages
한국경호경비학회 시큐리티연구 드론특별호 4 87-110 (24 pages)
/ 16Kbps(G.726) / 32Kbps(MP2L2) Image Image Resolution Over 3840x2160 Frame Rate 50Hz: 25fps at Max resolution 60Hz: 24fps at Max resolution Image Setting: Rotate Mode, Saturation, Brightness, Contrast, Sharpness adjustable Picture Overlay LOGO picture can be overlaid on video Day/Night Switch Auto/Schedule/Triggered by Alarm In Network Network Storage NAS, ANR Protocols TCP/IP, UDP, ICMP, HTTP,... 지금과 같이 사회가 복잡해지고 다양한 사건이 많이 발생하는 현대사회에서 국립공원이 나, 숲이 우거진 등산로에서 실종자가 종종 발생하면 많은 인력과 장비가 투입되어 실종자 수색을 위한 엄청난 비용과 인력이 소모되고 있는 상황이다. 근간에 지방경찰서에서 민간 의 협조를 받아 실종자 발생시 일반인 촬영용 드론을 도입해서 미비하게 실종자나 구조가 필요한 사람을 찾는데 도움을 주고 있는 상태이다. 특히 치매노인환자나 어린이의 경우 일정시간의 골든타임을 놓치면 바로 사체로 발견되는 경우가 종종발생하고 있기에 드론을...