자료유형
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전체 선택해제
총 112건 검색
본문검색 결과만 보기
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폴리우레탄의 열분해 및 연소반응의 특성
박재석, 이해평 한국열환경공학회 열환경공학 17 Pages
한국열환경공학회 열환경공학 2015, 제 12권 1호 6 57-73 (17 pages)
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Effect of Acupressure Massage on Temperatures of Acupoints, Severity of Facial Paralysis, Subjective Symptoms, and Depression in Bell’s Palsy Patients
Jeongsoon Lee, Younghae Chung 한국기초간호학회 Journal of Korean Biological Nursing Science 10 Pages
한국기초간호학회 Journal of Korean Biological Nursing Science 2015, Volume 17, No 2 7 140-149 (10 pages)
Purpose: Bell’s palsy is a nerve paralysis disease that causes functional impairments and affects psychological and aesthetical parts. This study aimed to examine whether acupressure massage had positive effects on facial paralysis, subjective symptoms, and depression in Bell’s palsy patients. Methods: This study was conducted by a nonequivalent control group pretest-posttest design. Participants were 60 patients with Bell’s palsy. 30 patients were assigned to the experimental group and the... -
교안(a teaching program[plan];a lesson schedule )이란 교수가 강의를 준비하는 단계로 서 수업 활동 중에서 가장 기본이 되며 교사의 능동적이고 주체적이며 독자적인 활동이 이루 어지는 단계라고 볼 수 있다. 주어진 시간 안에 알찬 내용을 학생들에게 전달하기위해 교안 연구는 수업에 있어서 필수적인 과정이며 준비된 교안은 알찬 수업을 이끈다는 것은 당연하 다. 그러므로 준비된 교안이 있다는 것 자체가 교사에게는 마음 든든한 조력자이며 교안을 만 들어 가는 과정을 통하여 훌륭한 강의를 만들기 위한 훈련과정을 축적해...
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고온가속열화에 따른 고분자절연재료의 열화특성에 관한 연구
한국웰니스학회 한국웰니스학회지 2009, 제 4권 1호 10 99-105 (7 pages)
산업의 고도화 및 다양화로 인한 전력수요의 급 증으로 절연성능에 대한 새로운 관심과 더불어 기 존 재료들보다 절연특성이 우수한 고분자 복합체 를 개발하기 위한 연구가 진행되고 있다(이재효, 1997; 박용환, 강영구, 김흥, 1996; 백운봉, 이해무, 박종서, 윤미봉, 2001; 김명곤, 강상국, 김천곤, 공철 원, 2004; Mills, 2003). 그중 유리섬유 강화 복합재 료(FRP; fiber reinforced plastics)는 전기적, 화학적 으로 우수한 특성을 갖는 유기재료에 기계적 강도 를 보강하기 위해 유리섬유를 복합시킨 하이브리 드(Hybrid)재료로서... -
Relationships between dielectric properties and characteristics of impregnated and activated samples of potassium carbonate- and sodium hydroxide-modified palm kernel shell for microwave-assisted activation
Norulaina Alias, Muhammad Abbas Ahmad Zaini, Mohd Johari Kamaruddin 한국탄소학회 Carbon Letters 11 Pages
한국탄소학회 Carbon Letters 2017, Vol.24 9 62-72 (11 pages)
The aim of this work was to evaluate the dielectric properties of impregnated and activated palm kernel shells (PKSs) samples using two activating agents, potassium carbonate (K2CO3) and sodium hydroxide (NaOH), at three impregnation ratios. The materials were characterized by moisture content, carbon content, ash content, thermal profile and functional groups. The dielectric properties were examined using an open-ended coaxial probe method at various microwave frequencies (1?6 GHz) and... -
Applications of carbon-based materials in solid phase micro-extraction: a review
Jian Guo, Soo-Jin Park, Long-Yue Meng, Xinghua Jin 한국탄소학회 Carbon Letters 8 Pages
한국탄소학회 Carbon Letters 2017, Vol.24 2 10-17 (8 pages)
With continuous development in the field of sample preparation technology, solid phase micro-extraction (SPME) has been widely used in analytical chemistry for high extraction efficiency and convenient operation. Different materials lead to different extraction results. Among existing materials, carbon-based materials are still attracting attention from scientists due to their excellent physical and chemical properties as well as their modifiable surfaces, which could enhance the adsorption... -
Hole quality assessment of drilled CFRP and CFRP-Ti stacks holes using polycrystalline diamond (PCD) tools
Dave Kim, Aaron Beal, Kiweon Kang, Sang-Young Kim 한국탄소학회 Carbon Letters 8 Pages
한국탄소학회 Carbon Letters 2017, Vol.23 1 1-8 (8 pages)
Polycrystalline diamond (PCD) tools possessing high hardness and abrasive wear resistance are particularly suited for drilling of carbon fiber reinforced plastic (CFRP) composites, where tool life and consistent hole quality are important. While PCD presents superior performance when drilling CFRP, it is unclear how it performs when drilling multi-stack materials such as CFRP-titanium (Ti) stacks. This comparative study aims to investigate drilling of a Ti plate stacked on a CFRP panel when... -
Extraction and characterization of lignin from black liquor and preparation of biomass-based activated carbon therefrom
Daeyeon Kim, Jinsil Cheon, Jeonghoon Kim, Daekyun Hwang, Ikpyo Hong, Oh Hyeong Kwon, Won Ho Park, Donghwan Cho 한국탄소학회 Carbon Letters 8 Pages
한국탄소학회 Carbon Letters 2017, Vol.22 14 81-88 (8 pages)
brittle surfaces, the increased thermal stability, and the carbon assay with increasing the carbonization temperature. The scanning electron microscopic images and the Brunauer-Emmett-Teller result indicate that the steam-activated carbon has the specific surface area of 1718 m2/g, which is markedly greater than the carbonized lignin. This study reveals that biomassbased activated carbon with highly porous structure can be produced from costless black liquor via steam-activation process. -
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)
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... -
Morphologies and surface properties of cellulose-based activated carbon nanoplates
Seulbee Lee, Min Eui Lee, Min Yeong Song, Se Youn Cho, Young Soo Yun, Hyoung-Joon Jin 한국탄소학회 Carbon Letters 7 Pages
한국탄소학회 Carbon Letters 2016, Vol.20 5 32-38 (7 pages)
sulfate functional groups introduced during the manufacturing process. In addition, pyrolyzed CNPs (CCNPs) showed more effective chemical activation behavior compared with MCC-induced carbonaceous materials. The activated CCNPs exhibited a microporous carbon structure with a high surface area of 1310.6 m2/g and numerous oxygen heteroatoms. The results of this study show the effects of morphology and the surface properties of cellulose-based nanomaterials on pyrolysis and the activation process.
