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크리프와 건조수축을 고려한 RC쉘 구조물의 비선형 해석
정진환, 한충목, 조현영 한국콘크리트학회 콘크리트학회지 8 Pages
한국콘크리트학회 콘크리트학회지 1993, Vol.5 No.2 181-188 (8 pages)
본 논문에서는 철근콘크리트 쉘 구조물의 크리프와 건조수축에 의한 시간의존성 효과를 포함하여 해석할 수 있는 기법을 개발하였다. Degenerate 쉘 요소를 해석에 사용하였으며 층 분할 기법을 이용하였다. 콘크리트의 압축 거동 모델은 탄-소성 모델 혹은 변형율 경화 모델을 사용할 수 있도록 하였고, 인장 영역에서는 균열 발생시 까지 선형 탄성으로 가정하였다. 철근은 등가의 두께를 가지는 철근 층으로 근사되었으며 각 철근 층은 철근의 배치 방향으로만 저항하는 일축거동을 하며 응력-변형율 곡선을 두 개의 직선으로 이상화... -
Changes in c-Fos Expression in the Forced Swimming Test: Common and Distinct Modulation in Rat Brain by Desipramine and Citalopram
SunHyeChoi, SungChung, JinHeeCho, YunHaCho, JinWookKim, JeongMinKim, HeeJeongKim, HyunJuKim, KyungHoShin 대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 9 Pages
대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 2013, Vol.17 No.4 10 321-329 (9 pages)
Rodents exposed to a 15-min pretest swim in the forced swimming test (FST) exhibit prolonged immobility in a subsequent 5-min test swim, and antidepressant treatment before the test swim reduces immobility. At present, neuronal circuits recruited by antidepressant before the test swim remain unclear, and also less is known about whether antidepressants with different mechanisms of action could influence neural circuits differentially. To reveal the neural circuits associated with antidepressant... -
Formation of nanojoints between carbon nanotubes and copper nanoparticles
Jagjiwan Mittal, Kwang Lung Lin 한국탄소학회 Carbon Letters 7 Pages
한국탄소학회 Carbon Letters 2017, Vol.21 11 86-92 (7 pages)
Exceptional properties and a one dimensional structure make carbon nanotubes (CNTs) a promising candidate for future applications in the electronic industry [1-3]. Because of their smaller dimensions and higher conductivity as compared to copper, multi-walled carbon nanotubes (MWCNT) may increase the bandwidth density of global interconnects [4]. They demonstrate charge carrier mean free paths between 500 nm and 10 μm as compared to 40 nm in metals. CNTs can carry exceptionally high current... -
Microwave-assisted pretreatment technologies for the conversion of lignocellulosic biomass to sugars and ethanol: a review
Pradeep Puligundla, Sang-Eun Oh, Chulkyoon Mok 한국탄소학회 Carbon Letters 10 Pages
한국탄소학회 Carbon Letters 2016, Vol.17 No.1 1 1-10 (10 pages)
Lignocellulosic biomass conversion to biofuels such as ethanol and other value-added bio-products including activated carbons has attracted much attention. The development of an efficient, cost-effective, and eco-friendly pretreatment process is a major challenge in lignocellulosic biomass to biofuel conversion. Although several modern pretreatment technologies have been introduced, few promising technologies have been reported. Microwave irradiation or microwave-assisted methods (physical and... -
Activated carbons prepared from mixtures of coal tar pitch and petroleum pitch and their electrochemical performance as electrode materials for electric double-layer capacitor
Eunji Lee, Soon Hyung Kwon, Poo Reum Choi, Ji Chul Jung, Myung-Soo Kim 한국탄소학회 Carbon Letters 8 Pages
한국탄소학회 Carbon Letters 2015, Vol.16 No.2 2 78-85 (8 pages)
Activated carbons (ACs) were prepared by activation of coal tar pitch (CTP) in the range of 700°C-1000°C for 1-4 h using potassium hydroxide (KOH) powder as the activation agent. The optimal activation conditions were determined to be a CTP/KOH ratio of 1:4, activation temperature of 900°C, and activation time of 3 h. The obtained ACs showed increased pore size distribution in the range of 1 to 2 nm and the highest specific capacitance of 122 F/g in a two-electrode system with an organic... -
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)
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... -
Carbon nanotubes–properties and applications
Khalid Saeed Ibrahim 한국탄소학회 Carbon Letters 14 Pages
한국탄소학회 Carbon Letters 2013, Vol.14 No.3 1 131-144 (14 pages)
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경로의존형 체적제어법을 이용한 철근콘크리트 중공 기둥의 유한요소해석
송하원, 남상혁, 임상묵, Song. Ha-Won, Nam. Sang-Hyeok, Lim. Sang-Mook 한국콘크리트학회 콘크리트학회논문집 10 Pages
한국콘크리트학회 콘크리트학회논문집 2007, Vol.19 No.3 341-350 (10 pages)
철근콘크리트 적층 쉘 요소에 압력 증분을 추가 자유도로 갖는 압력 절점을 추가하여 쉘 구조물의 체적 제어를 통해 비선형해석을 하는 체적제어법은 기존의 유한요소해석 기법인 하중제어법과 변위제어법이 갖는 한계를 극복하기 위해 개발된 방법이다. 본 연구에서는 개선된 체적제어법을 통해 다양한 하중을 받는 철근콘크리트 중공형 기둥 구조물의 경로의존적 거동을 효과적으로 분석하기 위해 역반복하중을 받는 철근콘크리트 중공형 기둥 구조물과 횡하중과 축력을 동시에 받는 철근콘크리트 중공형 기둥 구조물 등에 대한... -
압력절점을 갖는 적층쉘 요소에 의한 콘크리트 원통형 구조물의 파괴해석
송하원, 방정용, 변근주, 최강룡 한국전산구조공학회 한국전산구조공학회논문집 10 Pages
한국전산구조공학회 한국전산구조공학회논문집 1999, Vol.12 No.3 475-484 (10 pages)
압력절점은 요소의 균등한 압력증분을 1개의 자유도로 갖는 절점이며, 유한요소의 하중-변위 평형방정식에 체적과 압력의 관계를 추가하여 한계압력 이후에서도 체적변화에 따른 압력증분을 직접적으로 제저할 수 있는 절점이다. 본 연구에서는 철근콘크리트의 평면 구성 방정식과 적층정식화에 적용한 쉘 요소에 압력절점을 추가하고 해석시 체적을 제어함으로써 철근콘크리트 원통형 구조에 대해 파괴까지의 극한내압 능력을 해석할 수 있는 체적제어 비선형 해석기법을 개발하였다. 본 논문에서 제안한 해석기법을 이용하여... -
Identification, Characterization, and Efficacy Evaluation of Bacillus velezensis for Shot-Hole Disease Biocontrol in Flowering Cherry
Viet-Cuong Han, Nan Hee Yu, Hyeokjun Yoon, Neung-Ho Ahn, Youn Kyoung Son, Byoung-Hee Lee, Jin-Cheol Kim 한국식물병리학회 The Plant Pathology Journal 16 Pages
한국식물병리학회 The Plant Pathology Journal 2022, 38권 2호 5 115-130 (16 pages)
Though information exists regarding the pathogenesis of the shot-hole disease (SH) in flowering cherry (FC), there has been a lack of research focusing on SH management. Therefore, here, we investigated the inhibitory activities of antagonistic bacteria against SH pathogens both in vitro and in vivo as well as their biochemical characteristics and bioactive compounds. Two biosurfactant- producing bacterial antagonists, identified as Bacillus velezensis strains JCK-1618 and JCK-1696, exhibited... -
Double-walled carbon nanotubes: synthesis, structural characterization, and application
Yoong Ahm Kim, Kap-Seung Yang, Hiroyuki Muramatsu, Takuya Hayashi, Morinobu Endo, Mauricio Terrones, Mildred S. Dresselhaus 한국탄소학회 Carbon Letters 12 Pages
한국탄소학회 Carbon Letters 2014, Vol.15 No.2 4 77-88 (12 pages)
their intrinsic coaxial structures they are mechanically, thermally, and structurally more stable than single walled CNTs. Geometrically, owing to the buffer-like function of the outer tubes in DWCNTs, the inner tubes exhibit exciting transport and optical properties that lend them promise in the fabrication of field-effect transistors, stable field emitters, and lithium ion batteries. In addition, by utilizing the outer tube chemistry, DWCNTs can be useful for anchoring semiconducting quantum... -
Improving dispersion of multi-walled carbon nanotubes and graphene using a common non-covalent modifier
Youbin Kwon, Wonbo Shim, Seung-Yeol Jeon, Ji-Ho Youk, Woong-Ryeol Yu 한국탄소학회 Carbon Letters 9 Pages
한국탄소학회 Carbon Letters 2016, Vol.20 8 53-61 (9 pages)
The reportedly synergistic effects of carbon nanotubes (CNTs) and graphene hybrids have prompted strong demand for an efficient modifier to enhance their dispersion. Here, we investigated the ability of poly(acrylonitrile) (PAN) to overcome the van der Waals interaction of multi-walled CNTs (MWCNTs) and graphene by employing a simple wrapping process involving ultrasonication and subsequent centrifugation of PAN/MWCNT/graphene solutions. The physical wrapping of MWCNTs and graphene with PAN was... -
Carbon-allotropes: synthesis methods, applications and future perspectives
P. S. Karthik, A. L. Himaja and Surya Prakash Singh 한국탄소학회 Carbon Letters 19 Pages
한국탄소학회 Carbon Letters 2014, Vol.15 No.4 1 219-237 (19 pages)
fields of science and technology. So as an honour to this marvellous element, we humans should know about its various forms of existence. In this review article, we shed light on all possible carbon-allotropes; similarities in their synthesis techniques and the starting materials; their wide range of possible availability; and finally, future perspectives and applications. A brief introduction is given on the types, structures, and shapes of the allotropes of carbon for a better understanding.
