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6-방향 스캐닝과 영역 중심점을 이용한 아무르불가사리의 개선된 특징 추출 기법
신현덕, 주란희, Shin. Hyun-Deok, Chu. Ran-Heui 한국인터넷방송통신학회 한국인터넷방송통신학회 논문지 9 Pages
한국인터넷방송통신학회 한국인터넷방송통신학회 논문지 2013, Vol.13 No.2 67-75 (9 pages)
효과적으로 특징을 추출하는 방법을 제안하였다. 제안한 방법에서는 6-방향 스캐닝을 이용한 볼록 특징 추출을 사용하여 기존 방법에 비해서 적은 수의 특징 후보를 산출한다. 또한, 추출된 볼록 특징과 영역 중심점을 이용하여 후보 오목점을 선정한 후 최종 오목 특징을 추출한다. 군집 생활을 하는 불가사리의 특성 때문에 입력 영상의 불가사리 개체도 밀집되어 있다. 따라서 입력 영상에서 추출되는 특징 후보의 수를 최소화하는 것은 중요한 의미를 갖는다. 실험결과, 제안한 특징 추출 방법은 특징 후보수 대비 특징 추출률이 약... -
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)
sol-cryo directional freezing is a generic, simple, and novel route for preparing 3D monolithic structures. Different freezing methods, which determine the pore sizes and volumes, can be used, including unidirectional freeze-drying, non-directional freeze-drying, and air freeze-drying. The sizes and shapes of the resulting 3D foams are also infuenced by the mold utilized for freezing. Kuang... 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... -
Phenylethynyl-terminated polyimide, exfoliated graphite nanoplatelets, and the composites: an overview
Donghwan Cho, Lawrence T. Drzal 한국탄소학회 Carbon Letters 11 Pages
한국탄소학회 Carbon Letters 2016, Vol.19 1 1-11 (11 pages)
interlaminar shear strength (ILSS) tests can often provide very useful infor- mation [60-62]. Short-beam shear test results have indicated that when PETI-5 was sized at 150°C, the ILSS of a 2-directional carbon/BMI composite was markedly improved, by about 35% and 66%, respectively, in comparison to an unsized counterpart, as seen in Fig. 8. The adhesion enhancement strongly depends not... In efforts to characterize and understand the properties and processing of phenylethynyl-terminated imide (LaRC PETI-5, simply referred to as PETI-5) oligomers and polymers as a high-temperature sizing material for carbon fiber-reinforced polymer matrix composites, PETI-5 imidization and thermal curing behaviors have been extensively investigated based on the phenylethynyl end-group reaction. These studies are reviewed here. In addition, the use of PETI-5 to enhance interfacial adhesion between... -
Modification of isotropic coal-tar pitch by acid treatments for carbon fiber melt-spinning
Mi Jung Yoo, Hyo Jun Ko, Yun-Soo Lim and Myung-Soo Kim 한국탄소학회 Carbon Letters 8 Pages
한국탄소학회 Carbon Letters 2014, Vol.15 No.4 3 247-254 (8 pages)
directional characteristic, its carbon fber has poor mechanical properties such as tensile strength and tensile modulus. The isotropic pitch fber can be used in common- place applications such as sporting goods and insulators [14]. Most previous studies on CTP have the limitation that modi- fed CTPs were only analyzed but not applied to products such as carbon fber. The goal of this study is... obtain a softening point (SP) range of 220°C-260°C and many meso-phase particles were created during the application of high reaction temperature. When nitric acid or sulfuric acid treatment was conducted before the thermal treatment, the precursor pitch with a proper SP range could be obtained at reaction temperatures of 280°C- 300°C, which were about 100°C lower than those for the case of thermal treatment only. With the acid treatments, the yield and SP of the precursor pitch increased... -
A Review on Thermal Conductivity of Polymer Composites Using Carbon-Based Fillers : Carbon Nanotubes and Carbon Fibers
Jinho Hong, Dong Wha Park , Sang Eun Shim 한국탄소학회 Carbon Letters 10 Pages
한국탄소학회 Carbon Letters 2010, Vol.11 No.4 12 347-356 (10 pages)
of the nanofillers can give the desired directional properties, but it is not always easy to obtain such alignment with the normal polymer processing methods of extrusion and injection molding. CNF and CNT have same 1-dimensional structures and both are fabricated by the catalytic decomposition of aliphatic hydrocarbons. But they are different in the diameter (CNF: ~100 nm, CNT: 1~10 nm) and their... -
Effects of Fluvastatin on the Pharmacokinetics of Repaglinide: Possible Role of CYP3A4 and P-glycoprotein Inhibition by Fluvastatin
Chong-KiLee, Jun-ShikChoi, JoonSeokBang 대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 7 Pages
대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 2013, Vol.17 No.3 10 245-251 (7 pages)
bi-directional phar- macokinetic interactions betw een fluvastatin and CYP3A4 substrates have not been eval uated and it is not clear yet whether fluvastatin can alter the pharmacokinetics of CYP3A4 substrates such as repaglinide. The inhibitory ef- fect of fluvastatin against CYP enzymes and P-gp is ambig- uous elsewhere. Therefore, we evaluated the inhibition of CYP3A4 activity and P-gp... by 46.1% compared to the control group. Moreover, the relative BA of repaglinide was 1.14- to 1.46-fold greater than that of the control. Compared to the i.v. control, fluvastatin significantly increased the AUC0-∞ of i.v. administered repaglinide. The blood glucose concentrations showed significant differences compared to the oral controls. Fluvastatin enhanced the oral BA of repaglinide, which may be mainly attributable to the inhibition of the CYP3A4-mediated metabolism of repaglinide in the... -
Different Phytohormonal Responses on Satsuma Mandarin (Citrus unshiu) Leaves Infected with Host-Compatible or Host-Incompatible Elsino? fawcettii
Kihye Shin, Dilli Prasad Paudyal, Seong Chan Lee, Jae Wook Hyun 한국식물병리학회 The Plant Pathology Journal 12 Pages
한국식물병리학회 The Plant Pathology Journal 2021, 37권 3호 6 268-279 (12 pages)
in response to several biotic stresses, its role in fungal infection-induced nodule development has not been established yet. Unlike fungus-induced nodules, E. fawcettii-induced pustules are directional. On the infected side of the leaves, papillae or projections are formed, whereas the correspond- ing indentations form on the other side of the leaves. Here, we report the reduction in GA... to host-compatible (SM16-1) and host-incompatible (DAR70024) isolates. In the early phase of infection by E. fawcettii, jasmonic acid- and salicylic acid-related gene expression was induced in response to infection with the compatible isolate. However, as symptoms advanced during the late phase of the infection, the jas- monic acid- and salicylic acid-related gene expression was downregulated. The gene expression patterns were compared between compatible and incompatible inter- actions. As scabs... -
한글 및 한자에 대한 시각적 인식의 대뇌 비대칭성
이희상, 민성길, 양창순 대한신경정신의학회 신경정신의학 8 Pages
대한신경정신의학회 신경정신의학 1992, 제 31권 제 6호 9 1100-1107 (8 pages)
； Elman등 1981 ； Endo둥 1981) 과 일 치하는 것이다. 이러한 경향은 글자를 읽는데 따른 directional scanning tendency 때문이 아니 라고 한다 (Bradshaw 등 1981). 그러나 한자 1글자에 대한 인식이 좌반구에서 우세하였다는 것과 한자 2글자에서 좌우반구 사이 에 통계적으로 유의한 차이가 없었다는 것은 처음 예상과는 다소 다른 점이다. 즉，중국인에게서 하 나의 한자글자가 우반구에서 우세하게 인지되었다 는... -
Improvement of gas sensing properties of carbon nanofibers based on polyacrylonitrile and pitch by steam activation
Jeongsik Kim, Hyung-Il Kim, Jumi Yun 한국탄소학회 Carbon Letters 5 Pages
한국탄소학회 Carbon Letters 2017, Vol.24 5 36-40 (5 pages)
directional morphology. It has excellent electrical character- istics compared to a particle shape [5]. The gas sensing mech- anism of activated CNFs is based on the sensitive variation in the electrical conductivity caused by the gas adsorption onto the CNFs. Pitch is one of the raw materials used to produce CNFs. The pitch prepared from coal or petroleum residue has hydrocarbons of various... Polyacrylonitrile/pitch nanofibers were prepared by electrospinning as a precursor for a gas sensor material. Pitch nanofibers were properly fabricated by incorporating polyacrylonitrile as an electrospinning supplement component. Polyacrylonitrile/pitch nanofibers were activated with steam at various temperatures followed by subsequent carbonization to make carbon nanofibers with a highly conductive graphitic structure. Steam activation was effective in facilitating gas adsorption onto the... -
Morphological optimization of process parameters of randomly oriented carbon/carbon composite
Thakur Sudesh Kumar Raunija, Sushant Krunal Manwatkar, Sharad Chandra Sharma, Anil Verma 한국탄소학회 Carbon Letters 7 Pages
한국탄소학회 Carbon Letters 2014, Vol.15 No.1 3 25-31 (7 pages)
sink in an FC-72 ther- mosyphon. Exp Therm Fluid Sci, 34, 554 (2010). http://dx.doi. org/10.1016/j.expthermfusci.2009.11.008. [4] Luo R. Friction performance of C/C composites prepared using rapid directional diffused chemical vapor infltration processes. Carbon, 40, 1279 (2002). http://dx.doi.org/10.1016/S0008-6223 (01)00283-4. [5] Kasem H, Bonnamy S, Berthier Y, Dufrenoy P, Jacquemard P. Tri-... A microstructure analysis is carried out to optimize the process parameters of a randomly oriented discrete length hybrid carbon fiber reinforced carbon matrix composite. The composite is fabricated by moulding of a slurry into a preform, followed by hot-pressing and carbonization. Heating rates of 0.1, 0.2, 0.3, 0.5, 1, and 3.3°C/min and pressures of 5, 10, 15, and 20 MPa are applied during hot-pressing. Matrix precursor to reinforcement weight ratios of 70:30, 50:50, and 30:70 are also...