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- CARBON LETTERS(59)
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Buckling Analysis of Filament-Wound Thick Composite Cylinder under Hydrostatic Pressure
Kim. Myung-Hun, Cho. Jong-Rae, Bae. Won-Byong, Kweon. Jin-Hwe, Choi. Jin-Ho, Cho. Sang-Rae, Cho. Yun-Sik 한국정밀공학회 International journal of precision engineering and manufacturing 5 Pages
한국정밀공학회 International journal of precision engineering and manufacturing 2010, Vol.11 No.6 909-913 (5 pages)
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Local buckling of thin and moderately thick variable thickness viscoelastic composite plates
Jafari. Nasrin, Azhari. Mojtaba, Heidarpour. Amin 테크노프레스 Structural engineering and mechanics : An international journal 18 Pages
테크노프레스 Structural engineering and mechanics : An international journal 2011, Vol.40 No.6 783-800 (18 pages)
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Dynamics of thick hygrothermal viscoelastic composite laminates through finite element method
Assie. Amr E., Mahmoud. Fatin F. 테크노프레스 Structural engineering and mechanics : An international journal 8 Pages
테크노프레스 Structural engineering and mechanics : An international journal 2004, Vol.17 No.5 727-734 (8 pages)
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Comparative dynamic studies of thick laminated composite shells based on higher-order theories
Ganapathi. M., Patel. B.P., Pawargi. D.S., Patel. H.G. 테크노프레스 Structural engineering and mechanics : An international journal 17 Pages
테크노프레스 Structural engineering and mechanics : An international journal 2002, Vol.13 No.6 695-711 (17 pages)
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Thermal buckling analysis of thick anisotropic composite plates by finite strip method
Cheung. M.S., Akhras. G., Li. W. 테크노프레스 Structural engineering and mechanics : An international journal 12 Pages
테크노프레스 Structural engineering and mechanics : An international journal 1999, Vol.7 No.5 473-484 (12 pages)
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Vibration and stability analyses of thick anisotropic composite plates by finite strip method
Akhras. G., Cheung. M.S., Li. W. 테크노프레스 Structural engineering and mechanics : An international journal 12 Pages
테크노프레스 Structural engineering and mechanics : An international journal 1995, Vol.3 No.1 49-60 (12 pages)
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Thermo-electrical properties of randomly oriented carbon/carbon composite
Thakur Sudesh Kumar Raunija, N. Supriya 한국탄소학회 Carbon Letters 11 Pages
한국탄소학회 Carbon Letters 2017, Vol.22 3 25-35 (11 pages)
of low cost and rapidly produced randomly oriented carbon/carbon (C/C) composite. The composite body was fabricated by combining the high-pressure hot-pressing (HP) method with the lowpressure impregnation thermosetting carbonization (ITC) method. After the ITC method step selected samples were graphitized at 3000°C. Detailed characterization of the samples’ physical properties and thermal properties, including thermal diffusivity, thermal conductivity, specific heat and coefficient of thermal... -
Disorientation angle influence on the thermal residual stresses in carbon multilayered composite plates of different thicknesses
Olga Bitkina, Ki-Weon Kang, Jang-Ho Lee 한국탄소학회 Carbon Letters 5 Pages
한국탄소학회 Carbon Letters 2017, Vol.21 13 98-102 (5 pages)
One of the most acute problems in studying composite stress-strain states is determining the initial residual stresses during the design of layered construction elements. The full stress?strain state of composite constructions consists of the initial (generated during the manufacturing process) and operating (generated during the working period) stages. A thorough investigation of the initial stage of the stress-strain state is very important to finding the total stresses and deformations, and... -
Yield enhancement of matrix precursor in short carbon fiber reinforced randomly oriented carbon/carbon composite
Thakur Sudesh Kumar Raunija, Sharad Chandra Sharma, Anil Verma 한국탄소학회 Carbon Letters 9 Pages
한국탄소학회 Carbon Letters 2016, Vol.19 7 57-65 (9 pages)
impact were used to check the effect of stabilization and pressure on the yield of the matrix precursor and the end properties of the composite thereafter. The results showed that the yield increased with stabilization duration up to 20 h whereas it decreased for stabilization duration beyond 20 h. Further results showed that the stabilized matrix precursor for a duration of 5 h could withstand almost two-fold greater hot-pressing pressure without resulting in exudation as compared to that of a... -
Electrochemical synthesis of nanosized hydroxyapatite/graphene composite powder
Vesna Mi?kovi?-Stankovi?, Sanja Erakovi?, Ana Jankovi?, Maja Vuka?inovi?-Sekuli?, Miodrag Mitri?, Young Chan Jung, Soo Jin Park, Kyong 한국탄소학회 Carbon Letters 8 Pages
한국탄소학회 Carbon Letters 2015, Vol.16 No.4 2 233-240 (8 pages)
novel hydroxyapatite/graphene (HAP/ Gr) composite powder suitable for medical applications as a hard tissue implant (scaffold). The synthesis was performed in a homogeneous dispersion containing Na2H2EDTA·2H2O, NaH2PO4 and CaCl2 with a Ca/EDTA/PO4 3? concentration ratio of 0.25/0.25/0.15M, along with 0.01 wt% added graphene nanosheets, at a current density of 137 mA cm?2 and pH value of 9.0. The field emission scanning electron microscopy and transmission electron microscopy observations of the... -
Mg2SiO4/Glass Composite계 세라믹스를 이용한 음이온 발생용 후막형 클러스터
여동훈, 신효순, 홍연우, Yeo. Dong-Hun, Shin. Hyo-Soon, Hong. Youn-Woo 한국전기전자재료학회 전기전자재료학회논문지 6 Pages
한국전기전자재료학회 전기전자재료학회논문지 2010, Vol.23 No.2 118-123 (6 pages)
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A new higher-order triangular plate bending element for the analysis of laminated composite and sandwich plates
Rezaiee-Pajand. M., Shahabian. F., Tavakoli. F.H. 테크노프레스 Structural engineering and mechanics : An international journal 19 Pages
테크노프레스 Structural engineering and mechanics : An international journal 2012, Vol.43 No.2 253-271 (19 pages)
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Thermomechanical bending response of FGM thick plates resting on Winkler-Pasternak elastic foundations
Bouderba. Bachir, Houari. Mohammed Sid Ahmed, Tounsi. Abdelouahed 테크노프레스 Steel & Composite structures : an international journal 20 Pages
테크노프레스 Steel & Composite structures : an international journal 2013, Vol.14 No.1 85-104 (20 pages)
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Capacitance behaviors of conducting polymer-coated graphene nanosheets composite electrodes containing multi-walled carbon nanotubes as additives
Hoe-Seung Kim, Yongju Jung, Seok Kim 한국탄소학회 Carbon Letters 6 Pages
한국탄소학회 Carbon Letters 2017, Vol.23 9 63-68 (6 pages)
Global warming is rapidly becoming a major concern as a result of the continuing emissions of greenhouse gases generated by the combustion of fossil fuels. To resolve this problem, various studies on efficient energy storage devices have been undertaken. Electronic technologies are increasingly used in electronic products and systems, and they require effective energy storage [1,2]. Supercapacitors are energy storage devices with high power density and long cycle life, and have been spotlighted... -
Comparable bone healing capacity of different bone graft matrices in a rabbit segmental defect model
Jong Min Kim, Myoung Hwan Kim, Seong Soo Kang, Gonhyung Kim, Seok Hwa Choi* 대한수의학회 Journal of Veterinary Science 7 Pages
대한수의학회 Journal of Veterinary Science 2014, 제 15권 제 2호 16 289-295 (7 pages)
We compared the bone healing capacity of three different demineralized bone matrix (DBM) products applied using different carrier molecules (hyaluronic acid [HA] vs. carboxymethylcellulose [CMC]) or bone compositions (cortical bone vs. cortical bone and cancellous bone) in a rabbit segmental defect model. Overall, 15-mm segmental defects in the left and right radiuses were created in 36 New Zealand White rabbits and filled with HA-based demineralized cortical bone matrix (DBX), CMC-based... -
Comparing the osteogenic potential of canine mesenchymal stem cells derived from adipose tissues, bone marrow, umbilical cord blood, and Wharton's jelly for treating bone defects
Byung-Jae Kang, Hak-Hyun Ryu, Sung Su Park, Yoshihisa Koyama, Masanori Kikuchi, Heung-Myong Woo, Wan Hee Kim, Oh-Kyeong Kweon* 대한수의학회 Journal of Veterinary Science 12 Pages
대한수의학회 Journal of Veterinary Science 2012, 제 13권 제 3호 12 299-310 (12 pages)
Alternative sources of mesenchymal stem cells (MSCs) for replacing bone marrow (BM) have been extensively investigated in the field of bone tissue engineering. The purpose of this study was to compare the osteogenic potential of canine MSCs derived from adipose tissue (AT), BM, umbilical cord blood (UCB), and Wharton's jelly (WJ) using in vitro culture techniques and in vivo orthotopic implantation assays. After canine MSCs were isolated from various tissues, the proliferation and osteogenic... -
Implantation of canine umbilical cord blood-derived mesenchymal stem cells mixed with beta-tricalcium phosphate enhances osteogenesis in bone defect model dogs
Byung-Jun Jang, Ye-Eun Byeon, Ji-Hey Lim, Hak-Hyun Ryu, Wan Hee Kim, Yoshihisa Koyama, Masanori Kikuchi, Kyung-Sun Kang*, Oh-Kye 대한수의학회 Journal of Veterinary Science 8 Pages
대한수의학회 Journal of Veterinary Science 2008, 제 9권 제 4호 8 387-394 (8 pages)
This study was performed to evaluate the osteogenic effect of allogenic canine umbilical cord blood-derived mesenchymal stem cells (UCB-MSCs) mixed with beta-tricalcium phosphate (b-TCP) in orthotopic implantation. Seven hundred milligrams of b-TCP mixed with 1 × 10 UCB-MSCs diluted with 0.5 ml of saline (group CM) and mixed with the same volume of saline as control (group C) were implanted into a 1.5 cm diaphyseal defect and wrapped with PLGC membrane in the radius of Beagle dogs.... -
Sertoli cell proliferation during the post hatching period in domestic fowl
H. Hakan Bozkurt, Abit Aktas, M. Basak Ulkay, Umay B. Firat 대한수의학회 Journal of Veterinary Science 4 Pages
대한수의학회 Journal of Veterinary Science 2007, 제 8권 제 3호 3 219-222 (4 pages)
There has been no study aimed at directly determining of the periods of Sertoli cell proliferation in birds even domestic fowl. The aims of this study were to observe the cessation of post-hatching mitotic proliferation of Sertoli cells in domestic fowl, and to determine the volume density of Sertoli and germ cells during this period. A total of 50 Leghorn chicks were used in this study. The testes sections of the animals were immunostained with BrdU to observe the proliferation of cells from... -
Teaching about music and musical instruments of Kenya
David O. Akombo 한국음악교육학회 음악교육연구 25 Pages
한국음악교육학회 음악교육연구 2021, 제 50권 제 2호 11 221-245 (25 pages)
This paper examines the classification of traditional musical instruments of Kenya in the context of teaching multicultural music in the classroom. The paper show cases samples of music and musical instruments of Kenya and how these concepts can be used in a music lesson. The paper s addresses how these musical instruments are taxonomised using established ethnomusicological systems and innovative cultural perspectives to make the subject more discernable for music learners. This paper was... -
Human umbilical cord blood mesenchymal stem cells engineered to overexpress growth factors accelerate outcomes in hair growth
Dong Ho Bak, Mi Ji Choi, Soon Re Kim, Byung Chul Lee, Jae Min Kim, Eun Su Jeon, Wonil Oh, Ee Seok Lim, Byung Cheol Park, Moo Joong Kim, Ju 대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 12 Pages
대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 2018, Vol.22 No.5 9 555-566 (12 pages)
Human umbilical cord blood mesenchymal stem cells (hUCB-MSCs) are used in tissue repair and regeneration; however, the mechanisms involved are not well understood. We investigated the hair growth-promoting effects of hUCB-MSCs treatment to determine whether hUCB-MSCs enhance the promotion of hair growth. Furthermore, we attempted to identify the factors responsible for hair growth. The effects of hUCB-MSCs on hair growth were investigated in vivo, and hUCB-MSCs advanced anagen onset and hair... -
Critical Factors in Implant Aesthetics, Immediate Loading and Sinus Lifts
Dennis P. Tarnow 대한치과이식임플란트학회 Journal of Dental Implant Research 13 Pages
대한치과이식임플란트학회 Journal of Dental Implant Research 2005, 제 24권 1호 1 1-13 (13 pages)
2002년 Spain의 Barcelona에서 열렸던 Immediate Loading 에 관한 Consensus Meeting 에서 Definition 이 확정되기 전까진 미국과 유럽의 Immediate load ing 과 immediate function에 관한 정의는 서로 완전 히 상반된 것이었다. Today’s Definition of immediate loading after the 2002 consensus : A procedure in which dental implants are subjected to Functional Occlusal Forces / loads coincident with the date on which the surgery to place them was performed. -
Flexural, electrical, thermal and electromagnetic interference shielding properties of xGnP and carbon nanotube filled epoxy hybrid nanocomposites
Young Sil Lee, Yeon Ho Park, Kwan Han Yoon 한국탄소학회 Carbon Letters 6 Pages
한국탄소학회 Carbon Letters 2017, Vol.24 6 41-46 (6 pages)
filled with multi-walled carbon nanotubes (CNTs), exfoliated graphite nanoplatelets (xGnPs) and CNT-xGnP hybrid filler were investigated. The EMI SE of the CNT-xGnP hybrid composite was higher than 25 dB at 100 MHz while that of the xGnP based composite was almost zero. The flexural modulus of the CNT-xGnP based epoxy composite continuously increased to 3.32 GPa with combined filler content up to 10 wt% while that of the CNT based epoxy composites slightly decreased to 1.96 GPa at 4 wt% CNT, and... -
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)
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... -
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... -
Study on properties of eco-friendly reduction agents for the reduced graphene oxide method
Young-il Na, Young Il Song, Sun Woo Kim, Su-Jeong Suh 한국탄소학회 Carbon Letters 9 Pages
한국탄소학회 Carbon Letters 2017, Vol.24 1 1-9 (9 pages)
We studied the basic properties and fabrication of reduced graphene oxide (rGO) prepared using eco-friendly reduction agents in the graphene solution process. Hydrazine is generally used to reduce graphene oxide (GO), which results in polluting emissions as well as fixed nitrogen functional groups on different defects in the graphene sheets. To replace hydrazine, we developed eco-friendly reduction agents with similar or better reducing properties, and selected of them for further analysis. In... -
Fabrication of carbon fiber SMC composites with vinyl ester resin and effect of carbon fiber content on mechanical properties
Haksung Lee, Mongyoung Huh, Jaeyoung Yoon, Dasom Lee, Seonyul Kim, Shinjae Kang 한국탄소학회 Carbon Letters 4 Pages
한국탄소학회 Carbon Letters 2017, Vol.22 11 101-104 (4 pages)
Fiber reinforced composites are being used in the automotive industry and other manufacturing fields. Their properties, including high specific stiffness, strength and weight reduction make fiber composite materials an attractive replacement for metal components. The development of composites like carbon fiber reinforced plastic and related production technologies have contributed to the increasing application of fiber composite materials. Many new components have recently been adapted,... -
Green synthesis of reduced graphene oxide using ball milling
G. Calder?n-Ayala, M. Cortez-Valadez, P. G. Mani-Gonzalez, R. Britto Hurtado, J. I. Contreras-Rasc?n, R. C. Carrillo-Torres 한국탄소학회 Carbon Letters 5 Pages
한국탄소학회 Carbon Letters 2017, Vol.21 12 93-97 (5 pages)
Today, finding superior methods for synthesis of graphene oxide (GO) and reduced graphene oxide (rGO) from commercial graphite, is still a challenge. The global industry requires the use of synthesis methods that are price-competitive and also use processes that are environmentally compatible. GO is a substrate used for several chemical transformations, including its reduction to related materials, such as rGO and graphene. The rGO has been used recently to increase catalytic activity in the... -
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... -
Study of complex electrodeposited thin film with multi-layer graphene-coated metal nanoparticles
Young-Lae Cho, Jung-woo Lee, Chan Park, Young-il Song, Su-Jeong Suh 한국탄소학회 Carbon Letters 6 Pages
한국탄소학회 Carbon Letters 2017, Vol.21 8 68-73 (6 pages)
We have demonstrated the production of thin films containing multilayer graphene-coated copper nanoparticles (MGCNs) by a commercial electrodeposition method. The MGCNs were produced by electrical wire explosion, an easily applied technique for creating hybrid metal nanoparticles. The nanoparticles had average diameters of 10?120 nm and quasispherical morphologies. We made a complex-electrodeposited copper thin film (CETF) with a thickness of 4.8 μm by adding 300 ppm MGCNs to the electrolyte... -
The impact fracture behaviors of CFRP/EVA composites by drop-weight impact test
Sun-Ho Go, Hong-Gun Kim, Hee-Jae Shin, Min-Sang Lee, Hyun-Gyung Yoon, Lee-Ku Kwac 한국탄소학회 Carbon Letters 10 Pages
한국탄소학회 Carbon Letters 2017, Vol.21 4 23-32 (10 pages)
A drop weight impact test was conducted in this study to analyze the mechanical and thermal properties caused by the changes in the ratio of carbon fiber reinforced plastic (CFRP) to ethylene vinyl acetate (EVA) laminations. The ratios of CFRP to EVA were changed from 10:0 (pure CFRP) to 9:1, 8:2, 6:4, and 5:5 by manufacturing five different types of samples, and at the same time, the mechanical/thermal properties were analyzed with thermo-graphic images. As the ratio of the CFRP lamination was... -
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... -
NO gas sensing ability of activated carbon fibers modified by an electron beam for improvement in the surface functional group
Mi-Seon Park, Sangmin Lee, Min-Jung Jung, Hyeong Gi Kim, Young-Seak Lee 한국탄소학회 Carbon Letters 7 Pages
한국탄소학회 Carbon Letters 2016, Vol.20 3 19-25 (7 pages)
Activated carbon fiber (ACF) surfaces are modified using an electron beam under different aqueous solutions to improve the NO gas sensitivity of a gas sensor based on ACFs. The oxygen functional group on the ACF surface is changed, resulting in an increase of the number of non-carbonyl (-C-O-C-) groups from 32.5% for pristine ACFs to 39.53% and 41.75% for ACFs treated with hydrogen peroxide and potassium hydroxide solutions, respectively. We discover that the NO gas sensitivity of the gas sensor...
