자료유형
발행기관
- 한국탄소학회(15)
- 대한수학회(7)
- 대한생리학회-대한약리학회(4)
- 대한수의학회(2)
- 대한기계학회(1)
- 대한생리학회(1)
- 대한신경정신의학회(1)
- 대한약리학회(1)
- 대한전자공학회(1)
- 한국결정성장학회(1)
- 한국암반공학회(1)
- 한국전자파학회(1)
- 한국해양공학회(1)
- 환태평양유아교육연구학회(1)
간행물
- CARBON LETTERS(15)
- BULLETIN OF THE KOREAN MATHEMATICAL SOCIETY(5)
- THE KOREAN JOURNAL OF PHYSIOLOGY & PHARMACOLOGY(4)
- COMMUNICATIONS OF THE KOREAN MATHEMATICAL SOCIETY(2)
- JOURNAL OF VETERINARY SCIENCE(2)
- ASIA-PACIFIC JOURNAL OF RESEARCH IN EARLY CHILDHOOD EDUCATION(1)
- 대한기계학회론문집. TRANSACTIONS OF THE KOREAN SOCIETY OF MECHANICAL ENGINEERS. B. B(1)
- 대한생리학회지(1)
- 대한약리학잡지(1)
- 신경정신의학(1)
- 전자공학회논문지(1)
- 터널과 지하공간: 한국암반공학회지(1)
- 한국결정성장학회지(1)
- 한국전자파학회논문지(1)
- 한국해양공학회지(1)
전체 선택해제
총 38건 검색
본문검색 결과만 보기
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H-Polarized Scattering by an Inversely Tapered Resistive Half Plane
양승인, 나정웅, Yang. Seung-In, Ra. Jung-Woong 대한전자공학회 전자공학회논문지 7 Pages
대한전자공학회 전자공학회논문지 1989, Vol.26 No.7 1-7 (7 pages)
가장자리로 부터 역비례로 저항률이 변하는 반평면에 H분극 평면파가 입사되는 경우, 산란파를 Kontorovich-Lebedev 변환을 이용해서 정확한 적분식으로 얻었으며, 이로부터 모든 각도에서 쓸 수 있는 균일 근사식 및 계산된 산란파를 광선적(光線的)으로 해석할 수 있도록 해주는 비균일 근사식도 구했다. 저항율의 상수 여러 값에 대하여 가장자리 회절 패턴을 보였다. 결과들은 물리적으로 타당함을 알 수 있었다. -
R-plane 사파이어 기판위의 GaN/InGaN 이종접합구조의 HVPE 성장
전헌수, 황선령, 김경화, 장근숙, 이충현, 양민, 안형수, 김석환, 장성환, 이수민, 박길한, Jeon. H.S., Hwang. S.L., Kim. K.H., Jang. K.S., Lee. C.H., Yang. M., Ahn. H.S., Kim. S.W., Ja 한국결정성장학회 한국결정성장학회지 5 Pages
한국결정성장학회 한국결정성장학회지 2007, Vol.17 No.1 6-10 (5 pages)
R-plane 사파이어 위에 a-plane GaN층이 성장된 기판에 혼합소스 HVPE(mixed-source hydride vapor phase epitaxy) 방법으로 GaN/InGaN의 이종접합구조(heterostructure)를 구현하였다. GaN/InGaN 이종접합구조는 GaN, InGaN, Mg-doped GaN 층으로 구성되어 있다. 각 층의 성장온도는 GaN층은 $820^{circ}C$, InGaN 층은 $850^{circ}C$, Mg-doped GaN 층은 $1050^{circ}C$에서 성장하였다. 이때의 $NH_3$와 HCl 가스의 유량은 각각 500 sccm, 10 sccm 이었다. SAG-GaN/InGaN 이종접합구조의 상온 EL (electroluminescence) 특성은... -
Multi-voxel magnetic resonance spectroscopy of cerebral metabolites in healthy dogs at 1.5 Tesla
Sooyoung Choi, Yumi Song, Kija Lee, Youngwon Lee, Hojung Choi 대한수의학회 Journal of Veterinary Science 8 Pages
대한수의학회 Journal of Veterinary Science 2016, 제 17권 제 2호 11 217-224 (8 pages)
This study was conducted to measure the difference in levels of cerebral metabolites in the right and left hemispheres, gray (GM) and white matter (WM), imaging planes, and anatomical regions of healthy dogs to establish normal variations. Eight male Beagle dogs (1 to 4 years of age; mean age, 2 years) with no evidence of neurologic disease were studied. Using the multi-voxel technique on a 1.5 Tesla magnetic resonance imaging scanner, metabolite values (N-acetyl aspartate [NAA], choline [Cho],... -
Long-term Follow-up of Cutaneous Hypersensitivity in Rats with a Spinal Cord Contusion
Ji-InJung, JunesunKim, SeungKilHong, YoungWookYoon 대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 8 Pages
대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 2008, Vol.12 No.6 3 299-306 (8 pages)
Sometimes, spinal cord injury (SCI) results in various chronic neuropathic pain syndromes that occur diffusely below the level of the injury. It has been reported that behavioral signs of neuropathic pain are expressed in the animal models of contusive SCI. However, the observation period is relatively short considering the natural course of pain in human SCI patients. Therefore, this study was undertaken to examine the time course of mechanical and cold allodynia in the hindpaw after a spinal... -
Pre-ischemic Treatment with Ampicillin Reduces Neuronal Damage in the Mouse Hippocampus and Neostriatum after Transient Forebrain Ischemia
Kyung-EonLee, Seul-KiKim, Kyung-OkCho, SeongYunKim 대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 6 Pages
대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 2008, Vol.12 No.6 1 287-292 (6 pages)
Ampicillin, a Ղ-lactam antibiotic, has been reported to induce astrocytic glutamate transporter-1 which plays a crucial role in protecting neurons against glutamate excitotoxicity. We investigated the effect of ampicillin on neuronal damage in the mouse hippocampus and neostriatum following transient global forebrain ischemia. Male C57BL/6 mice were anesthetized with halothane and subjected to bilateral occlusion of the common carotid artery for 40 min. Ampicillin was administered... -
Young Chinese-Australian Children’s Use of Technology at Home: Parents’ and Grandparents’ Views
Ying Jiang, Hilary Monk 환태평양유아교육연구학회 Asia-Pacific journal of research in early childhood education 20 Pages
환태평양유아교육연구학회 Asia-Pacific journal of research in early childhood education 2016, Vol.10 No.1 5 87-106 (20 pages)
Young children are increasingly surrounded by a variety of technologies including television, computers, iPads, and mobile phones. This small qualitative study explored how Chinese immigrant families living in Australia viewed their children’s use of technology at home. Six parents and three grandparents representing nine different families with children aged three to six years were interviewed. Data were analysed using Rogoff’s (2003) personal, interpersonal and cultural-institutional planes... -
Li-ion battery anodes from ginkgo leaf-derived nanoporous carbons rich in redox-active heteroatoms
Na Rae Kim, Hong Joo An, Young Soo Yun, Hyoung-Joon Jin 한국탄소학회 Carbon Letters 5 Pages
한국탄소학회 Carbon Letters 2017, Vol.22 13 110-114 (5 pages)
Lithium-ion batteries (LIBs) have attracted increasing attention as a sustainable power source due to the rapid growth in mobile electronics and electric automobile markets, driven by increasing environmental awareness [1-4]. The electrochemical performance of LIBs is strongly dependent on the active electrode materials. Therefore, their continuing advanced development is of key importance to meet the expectations of the market [5-7]. Graphite, commonly used in LIB anodes, forms binary graphite... -
High-energy-density activated carbon electrode for organic electric-double-layer-capacitor using carbonized petroleum pitch
Poo Reum Choi, Sang-Gil Kim, Ji Chul Jung, Myung-Soo Kim 한국탄소학회 Carbon Letters 11 Pages
한국탄소학회 Carbon Letters 2017, Vol.22 8 70-80 (11 pages)
Activated carbons (ACs) have been used as electrode materials of electric double-layer capacitors (EDLC) due to their high specific surface areas (SSA), stability, and ecological advantages. In order to make high-energy-density ACs for EDLC, petroleum pitch (PP) precarbonized at 500?1000°C in N2 gas for 1 h was used as the electrode material of the EDLC after KOH activation. As the pre-carbonization temperature increased, the SSA, pore volume and gravimetric capacitance tended to decrease, but... -
Functional recovery and neural differentiation after transplantation of allogenic adipose-derived stem cells in a canine model of acute spinal cord injury
Hak-Hyun Ryu, Ji-Hey Lim, Ye-Eun Byeon, Jeong-Ran Park, Min-Soo Seo, Young-Won Lee, Wan Hee Kim, Kyung-Sun Kang*, Oh-Kyeong Kweo 대한수의학회 Journal of Veterinary Science 12 Pages
대한수의학회 Journal of Veterinary Science 2009, 제 10권 제 4호 1 273-284 (12 pages)
In this study, we evaluated if the implantation of allogenic adipose-derived stem cells (ASCs) improved neurological function in a canine spinal cord injury model. Eleven adult dogs were assigned to three groups according to treatment after spinal cord injury by epidural balloon compression: C group (no ASCs treatment as control), V group (vehicle treatment with PBS), and ASC group (ASCs treatment). ASCs or vehicle were injected directly into the injured site 1 week after spinal cord injury.... -
Cilostazol Decreases Ethanol-Mediated TNFalpha Expression in RAW264.7 Murine Macrophage and in Liver from Binge Drinking Mice
YounJuLee, JongRyeolEun 대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 8 Pages
대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 2012, Vol.16 No.2 8 131-138 (8 pages)
Alcoholic hepatitis is a leading cause of liver failure in which the increased production of tumor necrosis factor Ձ (TNFՁ) plays a critical role in progression of alcoholic liver disease. In the present study, we investigated the effects of cilostazol, a selective inhibitor of type III phosphodiesterase on ethanol-mediated TNFՁ production in vitro and in vivo, and the effect of cilostazol was compared with that of pentoxifylline, which is currently used in clinical trial.... -
Modulation of Large Conductance Ca2+-activated K+ Channel of Skin Fibroblast (CRL-1474) by Cyclic Nucleotides
JihyunYun, SeungtaeKim, HyoweonBang 대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 4 Pages
대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 2005, Vol.9 No.2 9 131-134 (4 pages)
Potassium channels in human skin fibroblast have been studied as a possible site of Alzheimer disease pathogenesis. Fibroblasts in Alzheimer disease show alterations in signal transduction pathway such as changes in Ca2 homeostasis and/or Ca2-activated kinases, phosphatidylinositol cascade, protein kinase C activity, cAMP levels and absence of specific K channel. However, little is known so far about electrophysiological and pharmacological characteristics of... -
Neural Substrates of Motor Imagery： Event-related Functional MRI Study
Seung-Schik Yoo, Byung Gil Choi, Kyu-In Chung, Chang-Uk Lee 대한신경정신의학회 신경정신의학 10 Pages
대한신경정신의학회 신경정신의학 2001, 제 40권 제 6호 25 1247-1256 (10 pages)
연구목적： 본 연구의 목적은 가상운동 과정시 대뇌 어느 부위가 활성화되는지를 알아보기 위하여 사건-관련 기능적 자기 공명영상을 통해 평가하였다. 방 법： 9명의 오른손잡이 정상인들에게 뇌 전 영역을 포괄한 일련의 T2강조 자기공명 영상을 얻기 위해 1.5 Tesla 자 기공명 영상장치를 사용하였다. 음성 자극 신호에 따라 오른손을 쥐는 상상을 하게 한 후, 그 결과 발생하는 가상 운동과 연관된 혈중 산화 수준-의존성 신호 변화들을 측정하였다. 결 과： 측정된 자료를 group 분석한 결과 내측 상부 전두회, 설상엽, 도, 중 /... -
Ethanol이 배양된 Mouse Myeloma Cell Line Sp2/0-Ag14로부터 분리한 형질막의 유동성에 미치는 영향
윤일(Il Yun), 정인교(In-Kyo Chung), 박영민(Yeong-Min Park), 김진범(Jin-Bom Kim), 유성호(Seoung-Ho Yu), 강정숙(Jung-Sook Kang) 대한약리학회 대한약리학잡지 8 Pages
대한약리학회 대한약리학잡지 1993, 제 29권 제 1호 15 149-156 (8 pages)
Ethanol이 암세포 증식 속도에 미치는 직접적인 영향 검색의 일환으로 배양된 mouse myeloma cell line Sp2/0-Ag14로부터 분리한 형질막 (Sp2/0-PMV) 유동성에 미치는 ethanol의 영향을 형광분석법으로 측정하였다. 그 결과 ethanol은 Sp2/0-PMV 지질 이중층 측방확산운동의 범위와 속도를 증가시켰고 회전확산운동 범위도 증가시켰다. 특히 ethanol은 Sp2/0-PMV 지질이중층 중 내부단층 (inner monolayer)에 비하여 비교적 선택적으로 외부단층 (outer monolayer)의 회전확산운동 범위를 증가시킨다는 것을 확인하였다. -
X-선 회절을 이용한 A1 7075-T651합금의 파손해소
오세욱, 박수영, 부명환 한국해양공학회 韓國海洋工學會誌 11 Pages
한국해양공학회 韓國海洋工學會誌 1993, Vol.7 No.2 103-113 (11 pages)
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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... -
Three-dimensional porous graphene materials for environmental applications
Muruganantham Rethinasabapathy, Sung-Min Kang, Sung-Chan Jang, Yun Suk Huh 한국탄소학회 Carbon Letters 13 Pages
한국탄소학회 Carbon Letters 2017, Vol.22 1 1-13 (13 pages)
Porous materials play a vital role in science and technology. The ability to control their pore structures at the atomic, molecular, and nanometer scales enable interactions with atoms, ions and molecules to occur throughout the bulk of the material, for practical applications. Three-dimensional (3D) porous carbon-based materials (e.g., graphene aerogels/hydrogels, sponges and foams) made of graphene or graphene oxide-based networks have attracted considerable attention because they offer low... -
Effect of carbonization temperature on crystalline structure and properties of isotropic pitch-based carbon fiber
Jung Dam Kim, Jae-Seung Roh, Myung-Soo Kim 한국탄소학회 Carbon Letters 10 Pages
한국탄소학회 Carbon Letters 2017, Vol.21 6 51-60 (10 pages)
Isotropic pitch-based fibers produced from coal tar pitch with the melt-blowing method were carbonized at temperatures ranging from 800 to 1600oC to investigate their crystalline structure and physical properties as a function of the carbonization temperature. The in-plane crystallite size (La) of the carbonized pitch fiber from X-ray diffraction increased monotonously by increasing the carbonization temperature resulting in a gradual increase in the electrical conductivity from 169 to 3800... -
Synthesize multi-walled carbon nanotubes via catalytic chemical vapour deposition method on Fe-Ni bimetallic catalyst supported on kaolin
Aliyu A, Abdulkareem AS, Kovo AS, Abubakre OK, Tijani JO, Kariim I 한국탄소학회 Carbon Letters 18 Pages
한국탄소학회 Carbon Letters 2017, Vol.21 5 33-50 (18 pages)
In this study, Fe-Ni bimetallic catalyst supported on kaolin is prepared by a wet impregnation method. The effects of mass of kaolin support, pre-calcination time, pre-calcination temperature and stirring speed on catalyst yields are examined. Then, the optimal supported Fe-Ni catalyst is utilised to produce multi-walled carbon nanotubes (MWCNTs) using catalytic chemical vapour deposition (CCVD) method. The catalysts and MWCNTs prepared using the optimal conditions are characterized using high... -
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)
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... -
One-step synthesis of dual-transition metal substitution on ionic liquid based N-doped mesoporous carbon for oxygen reduction reaction
Ulziidelger Byambasuren, Yukwon Jeon, Dorjgotov Altansukh, Yunseong Ji, Yong-Gun Shul 한국탄소학회 Carbon Letters 12 Pages
한국탄소학회 Carbon Letters 2016, Vol.17 No.1 8 53-64 (12 pages)
Nitrogen (N)-doped ordered mesoporous carbons (OMCs) with a dual transition metal system were synthesized as non-Pt catalysts for the ORR. The highly nitrogen doped OMCs were prepared by the precursor of ionic liquid (3-methyl-1-butylpyridine dicyanamide) for N/C species and a mesoporous silica template for the physical structure. Mostly, N-doped carbons are promoted by a single transition metal to improve catalytic activity for ORR in PEMFCs. In this study, our N-doped mesoporous carbons were... -
Influence of oxidative atmosphere of the electron beam irradiation on cyclization of PAN-based fibers
Hye Kyoung Shin, Mira Park, Hak-Yong Kim, Soo-Jin Park 한국탄소학회 Carbon Letters 3 Pages
한국탄소학회 Carbon Letters 2015, Vol.16 No.3 10 219-221 (3 pages)
In order to study the impact of atmosphere during electron beam irradiation (EBI) of polyacrylonitrile (PAN) precursor fibers, the latter were stabilized by EBI in both air and oxygen atmospheres. Gel-fraction determination indicated that EBI-stabilization under an oxygen atmosphere leads to an enhanced cyclization in the PAN fibers. In the Fourier-transform infrared spectroscopy analysis, the PAN fibers stabilized by EBI under an oxygen atmosphere exhibited a greater decrease in the peak... -
Manufacturing and characteristics of PAN-based composite carbon fibers containing cellulose particles
Jee-Woo Yang, Da Young Jin, Ji Eun Lee, Seung Goo Lee, Won Ho Park 한국탄소학회 Carbon Letters 8 Pages
한국탄소학회 Carbon Letters 2015, Vol.16 No.3 7 203-210 (8 pages)
This study fabricated low thermal conductive polyacrylonitrile (PAN)-based carbon fibers containing cellulose particles while maintaining their mechanical properties. The high thermal conductivity of carbon fibers limits their application as a high temperature insulator in various systems such as an insulator for propulsion parts in aerospace or missile systems. By controlling process parameters such as the heat treatment temperature of the cellulose particles and the amount of cellulose added,... -
Stabilization of pitch-based carbon fibers accompanying electron beam irradiation and their mechanical properties
Mi-Seon Park, Yoonyoung Ko, Min-Jung Jung, Young-Seak Lee 한국탄소학회 Carbon Letters 6 Pages
한국탄소학회 Carbon Letters 2015, Vol.16 No.2 8 121-126 (6 pages)
Carbon fibers are prepared by stabilizing pitch fibers accompanying electron beam (E-beam) irradiation. The carbon fibers pretreated by E-beam irradiation achieve a higher stabilization index than the carbon fibers that are only heat-stabilized. In addition, the carbon fibers subjected to E-beam irradiation in the stabilization step exhibit a comparable tensile strength to that of general purpose carbon fibers. The carbon fibers pretreated with an absorbed dose of 3000 kGy have a tensile... -
The effects of stacking sequence on the penetration-resistant behaviors of T800 carbon fiber composite plates under low-velocity impact loading
Furqan Ahmad, Jung-Wuk Hong, Heung Soap Choi, Soo-Jin Park, Myung Kyun Park 한국탄소학회 Carbon Letters 9 Pages
한국탄소학회 Carbon Letters 2015, Vol.16 No.2 6 107-115 (9 pages)
Impact damages induced by a low-velocity impact load on carbon fiber reinforced polymer (CFRP) composite plates fabricated with various stacking sequences were studied experimentally. The impact responses of the CFRP composite plates were significantly affected by the laminate stacking sequences. Three types of specimens, specifically quasi-isotropic, unidirectional, and cross-ply, were tested by a constant impact carrying the same impact energy level. An impact load of 3.44 kg, corresponding to... -
Synthesis and electrochemical analysis of Pt-loaded, polypyrroledecorated, graphene-composite electrodes
Jiyoung Park, Seok Kim 한국탄소학회 Carbon Letters 4 Pages
한국탄소학회 Carbon Letters 2013, Vol.14 No.2 8 117-120 (4 pages)
In this study, an electro-catalyst of Pt nanoparticles supported by polypyrrole-functionalized graphene (Pt/PPy-reduced graphene oxide [RGO]) is reported. The Pt nanoparticles are deposited on the PPy-RGO composite by chemical reduction of H2PtCl6 using NaBH4. The presence of graphene (RGO) caused higher activity. This might have been due to increased electro-chemically accessible surface areas, increased electronic conductivity, and easier charge-transfer at polymer-electrolyte interfaces,... -
An Approximate Formulation for Scattering by Very Thin Dielectric Scatters
Koh. Il-Suek 한국전자파학회 韓國電磁波學會論文誌 10 Pages
한국전자파학회 韓國電磁波學會論文誌 2004, Vol.15 No.8 765-774 (10 pages)
본 논문에서 얇은 균질 유전체의 산란해석을 위한 근사식이 유도된다. 이 해는 volumetric integral equation을 바탕으로 Fourier transform형식으로 나타내어진다. 얇은 무한 평면구조에서는 구한 식은 정확한 해로 떨어지며 다른 2D 또는 3D 구조에 대해서는 수치해석 결과와 비교하여 구한 식의 유용성을 보였다. 특히 TM파가 edge-on 방향으로 입사할 경우 반 무한 평면 구조에서의 산란에 대한 closed-form식을 구했다. 구한 식은 넓은 범위의 유전률에 대해 정확한 결과를 예측한다. -
주변 공동을 고려한 터널의 동적거동에 관한 연구
김민규, 이종우, 이종세 한국암반공학회 터널과 지하공간: 한국암반공학회지 8 Pages
한국암반공학회 터널과 지하공간: 한국암반공학회지 2002, Vol.12 No.3 171-178 (8 pages)
본 연구에서는 마제형터널 주변에 공동이 존재하는 경우에 대해 동적해석을 수행함으로써 터널주변의 공동이 터널의 동적거동에 미치는 영향을 검토하였다. 이를 위해 반무한 평면상에서 터널의 동적응답해석을 수행할 수 있는 해석기법을 개발하였다. 먼저 주파수 영역에서의 다층 반무한 지반내에서의 동적 기본해를 유도하였고 이를 경계요소에 적용하였다. 외부영역을 모형화한 경계요소를 내부영역의 유한요소와 조합하여 반무한 영역에서의 터널구조의 동적응답을 구할 수 있도록 하였다. 개발된 기법의 검증을 위하여 단층 및 다층...
