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Verilog Modeling of Transmission Line for USB 2.0 High-Speed PHY Interface
Seong. Ki-Hwan, Lim. Ji-Hoon, Kim. Byungsub, Sim. Jae-Yoon, Park. Hong-June 대한전자공학회 Journal of semiconductor technology and science 8 Pages
대한전자공학회 Journal of semiconductor technology and science 2014, Vol.14 No.4 463-470 (8 pages)
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Dynamic-Voltage/Frequency-Scaling 알고리즘에서의 다중 인가 전압 조절 시스템 용 High-speed CMOS Level-Up/Down Shifter
임지훈, 하종찬, 위재경, 문규, Lim. Ji-Hoon, Ha. Jong-Chan, Wee. Jae-Kyung, Moon. Gyu 대한전자공학회 電子工學會論文誌. Journal of the Institute of Electronics Engineers of Korea. SD, 반도체 9 Pages
대한전자공학회 電子工學會論文誌. Journal of the Institute of Electronics Engineers of Korea. SD, 반도체 2006, Vol.43 No.6 9-17 (9 pages)
and frequency scaling (DVFS)알고리즘에 사용될 시스템 버스의 다중 코어 전압 레벨을 생성해주는 새로운 다계층(multi-level) 코어 전압용 high-speed level up/down Shifter 회로를 제안한다. 이 회로는 내부 회로군과 외부 회로군 사이에서 서로 다른 전압레벨을 조정 접속하는 I/O용 level up/down shifter interface 회로로도 동시에 사용된다. 제안하는 회로는 인터페이스 접속에서 불가피하게 발생하는 속도감쇄와 Duty Ratio 불안정 문제를 최소화하는 장점을 갖고 있다. 본 회로는 500MHz의 입력 주파수에서 $0.6Vsim1.6V$의... -
A Web-based Information System for Plant Disease Forecast Based on Weather Data at High Spatial Resolution
한국식물병리학회 The Plant Pathology Journal 12 Pages
한국식물병리학회 The Plant Pathology Journal 2010, 26권 1호 6 37-48 (12 pages)
This paper describes a web-based information system for plant disease forecast that was developed for crop growers in Gyeonggi-do, Korea. The system generates hourly or daily warnings at the spatial resolution of 240 m -
New Challenges for Low Cost and High Speed RF ATE System
Song. Ki-Jae, Lee. Ki-Soo, Park. Jongsoo, Lee. Jong-Chul 한국전자파학회 韓國電磁波學會論文誌 8 Pages
한국전자파학회 韓國電磁波學會論文誌 2004, Vol.15 No.8 744-751 (8 pages)
저가형 고속 RF 자동화 테스트 시스템(Automatic Test Equipment, ATE)의 제작에 관하여 다루어진다. 제작된 RF ATE는 고속의 스위칭 시간과 고정밀 디지타이저를 포함한 16개의 독립적인 RF 입출력 단자를 갖고 있으며 산업 표준인 VXI(Versus module eXtensions for Instrument)와 GPIB(General Purpose Interface Bus) 인터페이스를 사용하여 구성된다. 또한 소자의 생산효율을 극대화하기 위하여 동시에 4개의 소자를 테스트할 수 있도록 시스템이 구성된다. 마지막으로 현재 가격 경쟁이 상당히 심한 소자 중 하나인 RF 전력증폭모듈올,... -
On Beyong Status Quo: Emerging e-Learning Paradigm in Education
Insook Lee 한국교육학회 한국교육학회 학술대회논문집 26 Pages
한국교육학회 한국교육학회 학술대회논문집 KSSE Inter 19 439-464 (26 pages)
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Tribological properties of carbon fiber-reinforced aluminum composites processed by spark plasma sintering
Ki Hoon Jung, Seungjin Nam, Sung-Soo Kang, Bon-Cheol Ku, Yun Hyuk Bang, Jun Yeon Hwang 한국탄소학회 Carbon Letters 4 Pages
한국탄소학회 Carbon Letters 2017, Vol.21 14 103-106 (4 pages)
The development of light-weight and high-strength materials have gained attention to meet the evergrowing demands for safer and fuel-efficient automobiles. Thus, the importance and applications of composite materials are gradually increasing [1]. In the field of metal-matrix composite manufacturing, reinforcing agents are added to the metal matrix in the form of powders, whiskers, and fibers to improve the mechanical properties of metals [2]. Fibers have been used since the 1950s as structural... -
Mechanical properties of epoxy composites reinforced with ammonia-treated graphene oxides
Mi-Seon Park, Sangmin Lee, Young-Seak Lee 한국탄소학회 Carbon Letters 7 Pages
한국탄소학회 Carbon Letters 2017, Vol.21 1 1-7 (7 pages)
The effects of ammonia-treated graphene oxide (GO) on composites based on epoxy resin were investigated. Ammonia solutions of different concentrations (14?28%) were used to modify GO. Nitrogen functional groups were introduced on the GO surfaces without significant structural changes. The ammonia-treated GO-based epoxy composites exhibited interesting changes in their mechanical properties related to the presence of nitrogen functional groups, particularly amine (C-NH2) groups on the GO... -
Preparation and characterization of carbon fiber-reinforced thermosetting composites: a review
Fan-Long Jin, Soo-Jin Park 한국탄소학회 Carbon Letters 11 Pages
한국탄소학회 Carbon Letters 2015, Vol.16 No.2 1 67-77 (11 pages)
Carbon fibers (CFs) have a unique combination of properties which allow them to be widely used as reinforcing materials in advanced polymer composites. The mechanical properties of CF-reinforced polymer composites are governed mainly by the quality of interfacial adhesion between the CFs and the polymer matrix. Surface treatments of CFs are generally carried out to introduce chemical functional groups on the fiber surfaces, which provide the ability to control the surface characteristics of CFs.... -
모바일 기기 신호 인터페이스용 MIPI 디지털 D-PHY의 저전력 설계
김유진, 김두환, 김석만, 조경록, Kim. Yoo-Jin, Kim. Doo-Hwan, Kim. Seok-Man, Cho. Kyoung-Rok 한국콘텐츠학회 한국콘텐츠학회논문지 8 Pages
한국콘텐츠학회 한국콘텐츠학회논문지 2010, Vol.10 No.12 10-17 (8 pages)
본 논문에서는 모바일 기기 신호 인터페이스용 MIPI(Mobile industry processor interface)의 D-PHY의 디지털 블록의 저전력 설계를 제안한다. MIPI는 고속 데이터 전송을 위한 HS(high-speed)모드와 주로 제어에 사용되는 LP(low-power)모드의 두 가지 동작 모드를 갖는다. 저전력 소모를 위해 디지털 블록 내부 구성요소를 각 동작에 따라 선택적으로 스위칭 할 수 있는 클럭 게이팅(Clock gating) 기법을 적용했다. 저전력 동작의 설계에 대한 동작을 시뮬레이션을 통해 검증하고 기존의 일반적인 MIPI D-PHY 디지털 블록과 전력소모를... -
2-step DPC를 이용한 이중루프 DLL기반의 광대역 클록 데이터 복원회로 설계
정기상, 김강직, 고귀한, 조성익, Jung. Ki-Sang, Kim. Kang-Jik, Ko. Gui-Han, Cho. Seong-Ik 대한전기학회 전기학회논문지= The Transactions of the Korean Institute of Electrical Engineers 5 Pages
대한전기학회 전기학회논문지= The Transactions of the Korean Institute of Electrical Engineers 2012, Vol.61 No.2 324-328 (5 pages)
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고속 직렬 디스플레이 인터페이스를 위한 1/4-rate 클록 데이터 복원회로 설계
정기상, 김강직, 조성익, Jung. Ki-Sang, Kim. Kang-Jik, Cho. Seong-Ik 대한전기학회 전기학회논문지= The Transactions of the Korean Institute of Electrical Engineers 4 Pages
대한전기학회 전기학회논문지= The Transactions of the Korean Institute of Electrical Engineers 2011, Vol.60 No.2 455-458 (4 pages)
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주기억장치 상주형 DBMS을 위한 실시간 LDAP Interface에 관한 연구
이정배, 차상균, 김환철, 박병관, Lee. Jeong-Bae, Cha. Sang-Gyun, Kim. Hwan-Chul, Park. Byung-Kwan 한국정보처리학회 정보처리학회논문지. The KIPS transactions. Part A. Part A 8 Pages
한국정보처리학회 정보처리학회논문지. The KIPS transactions. Part A. Part A 2004, No.0 475-482 (8 pages)
우리는 정보통신의 발달로 인해서 정보의 호수 속에서 살고 있다. 이러한 이유로 해서 많은 사용자들은 많은 양의 정보를 빠르게 검색하기를 원한다. 본 논문에서는 이러한 요구사항을 만족하기 위해서 주기억장치 상주형 DBMS를 이용한 실시간 LDAP Interface를 제안하여 고속의 검색을 지원하고자 한다. 이를 위해서 디스크 기반의 DBMS 대신 주기억장치 상주형 DBMS를 대신하여 고속의 검색을 지원하여 응용의 변경없이 서비스를 제공할 수 있게 해준다. -
Production of a Phytotoxic Compound, 3-Phenylpropionic Acid by a Bacterial Endophyte, Arthrobacter humicola YC6002 Isolated from the Root of Zoysia japonica
한국식물병리학회 The Plant Pathology Journal 8 Pages
한국식물병리학회 The Plant Pathology Journal 2010, 26권 3호 6 245-252 (8 pages)
An endophytic bacterial strain, Arthrobacter humicola YC6002, was isolated from a surface sterilized root of Korean turf grass (Zoysia japonica) collected from Jinju, Korea. This strain showed inhibitory effect on germination and shoot growth of radish. The inhibition of germination and shoot growth of radish seeds varied depending on the age of culture and the temperature at which it was incubated. The culture filtrate of 1/10- strength Tryptic Soy Broth medium, incubated for 48 hours at 30 -
Design and Simulation of Foundation Technology for Zigbee-based Smart Grid Home Network System using OPNET Simulation
Jun-Ho Huh, Seung-Mo Je, Kyungryong Seo 인문사회과학기술융합학회 예술인문사회융합멀티미디어논문지 9 Pages
인문사회과학기술융합학회 예술인문사회융합멀티미디어논문지 2015, 제 5권 제 4호 10 81-89 (9 pages)
The Internet of Things (IoT) and the Smart Grid both are being discussed as the technologies that would dominate Korean IT industry by 2020. The PLC, Zigbee, NFC, ANT, Wi-Fi, Bluetooth and RFID are considered to be the foundation technologies for the Smart Grid and in this paper, we propose a Zigbee-based Smart Grid Home Network System. A comparative analysis has been carried out by performing additional Mobile WiMAX-based simulations with respect to the research paper published in the... -
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... -
Adsorption characteristics of heavy metals ions by physical activation on coal tar pitch-based activated carbon fibers
Bo-kyung Choi, Jae-Kyoung Ko, Soo-Jin Park, Min-Kang Seo 한국탄소학회 Carbon Letters 5 Pages
한국탄소학회 Carbon Letters 2017, Vol.22 10 96-100 (5 pages)
Due to the increasing population growth of modern society, along with rapid industrial development and urbanization, environmental pollution continues to worsen and has become an important issue, not only domestically but also worldwide. In particular, toxic substances such as heavy metal ions are present in the wastewater produced by various industries. This wastewater flows into rivers, pollutes water supplies, and can contaminate the drinking water supplied to people [1-3]. Powder or... -
Influence of hot-pressing pressure on the densification of short-carbon-fiber-reinforced, randomly oriented carbon/carbon composite
Thakur Sudesh Kumar Raunija and Sharad Chandra Sharma 한국탄소학회 Carbon Letters 9 Pages
한국탄소학회 Carbon Letters 2015, Vol.16 No.1 4 25-33 (9 pages)
The prime objective of this research was to study the influence of hot-pressing pressure and matrix-to-reinforcement ratio on the densification of short-carbon-fiber-reinforced, randomly oriented carbon/carbon-composite. Secondary objectives included determination of the physical and mechanical properties of the resulting composite. The ‘hybrid carbon-fiberreinforced mesophase-pitch-derived carbon-matrix’ composite was fabricated by hot pressing. During hot pressing, pressure was varied from 5... -
Comparison of spatio-temporal gait parameters according to shoe types in chronic stroke survivors
Soung Kyun Hong, Su Ho Park, Sung Ri Shin, Dong Geon Lee, Seung Hoo Lee, Sun Hye Jung, Seung Hyeon Pyo, Kyeong-Bong Lee, Gyu Chang Lee 물리치료재활과학회 Physical Therapy Rehabilitation Science 6 Pages
물리치료재활과학회 Physical Therapy Rehabilitation Science 2018, 제 7권 제 1호 5 23-28 (6 pages)
Objective: The purpose of this study was to investigate the impact of wearing various types of shoes on gait ability in stroke survivors and in order to gain information in regards to shoes that could possibly replace ankle orthosis. Design: Cross-sectional study. Methods: Eight hemiplegic survivors diagnosed with stroke participated in the study. Gait was analyzed using the GAITRite Electronic Walkway (CIR System Inc., USA) when subjects walked with no showed, walked with non-ankle-covered... -
Effects of task-oriented training for Gross Motor Function Measure, balance and gait function in persons with cerebral palsy
Hyun-Kyung Han, Yi-jung Chung 물리치료재활과학회 Physical Therapy Rehabilitation Science 6 Pages
물리치료재활과학회 Physical Therapy Rehabilitation Science 2016, 제 5권 제 1호 2 9-14 (6 pages)
Objective: This study was to investigate the effects of Task-oriented training for Gross Motor Function Measure (GMFM), gait and balance function in cerebral palsy. Design: Randomized controlled trials. Methods: Twenty four subjects were recruited by means of a convenience sampling from Kangseo-Gu G rehabilitation center. Subjects were 24 inpatients and were randomly divided into a task-oriented training group and a conventional group. Twelve patients were experimental group who executed the... -
A pilot study of augmented reality-based postural control training in stroke rehabilitation
Yu Hyung Park, Chi Ho Lee, Hang Jin Kim 물리치료재활과학회 Physical Therapy Rehabilitation Science 7 Pages
물리치료재활과학회 Physical Therapy Rehabilitation Science 2014, 제 3권 제 1호 3 13-19 (7 pages)
Objective: The purpose of this study was to determine the effects of Augmented Reality-based Postural Control (ARPC) training on balance and gait function in patients with stroke. Design: Single-blind randomized controlled trial. Methods: Twenty participants who experienced a stroke were enrolled in the study and randomly assigned to the ARPC (n=10) or control group (n=10). Subjects in both groups received conventional physical therapy for 60 min per session, 5 days per week, for 4 weeks. In... -
Evaluation of a canine small intestinal submucosal xenograft and polypropylene mesh as bioscaffolds in an abdominal full-thickness resection model of growing rats
A-Jin Lee, Sung-Ho Lee, Wook-Hun Chung, Dae-Hyun Kim, Dai-Jung Chung, Sun Hee Do, Hwi-Yool Kim* 대한수의학회 Journal of Veterinary Science 10 Pages
대한수의학회 Journal of Veterinary Science 2013, 제 14권 제 2호 9 175-184 (10 pages)
We evaluated the biological scaffold properties of canine small intestinal submucosa (SIS) compared to a those of polypropylene mesh in growing rats with full-thickness abdominal defects. SIS is used to repair musculoskeletal tissue while promoting cell migration and supporting tissue regeneration. Polypropylene mesh is a non-resorbable synthetic material that can endure mechanical tension. Canine SIS was obtained from donor German shepherds, and its porous collagen fiber structure was... -
E-learning in Cloud Computing Infrastructure
Hye-Jin Kim 인문사회과학기술융합학회 예술인문사회융합멀티미디어논문지 11 Pages
인문사회과학기술융합학회 예술인문사회융합멀티미디어논문지 2018, 제 8권 제 7호 80 819-829 (11 pages)
Cloud computing introduces an efficient scale mechanism that can let construction of E-learning system be entrusted to suppliers and provide a new mode for E-learning. It provides a convenient, on-demand access to a centralized shared pool of computing resources that can be deployed by a minimal management overhead and with a great efficiency. Cloud Computing is a new model for hosting resources and provisioning of services to the consumers. Therefore, an E-learning system based on Cloud... -
Melting Characteristics of Simulated Non-combustible Radioactive Wastes in a Plasma Torch Melter System
Seung-Chul Park, Hyun-Je Cho, Cheon-Woo Kim 한국열환경공학회 열환경공학 7 Pages
한국열환경공학회 열환경공학 2011, 제 8권 3호 7 53-59 (7 pages)
To reduce the volume of the low- and intermediate-level radioactive wastes and to improve the radionuclide confinement after disposal of the slag product, a 500kW-grade DC plasma torch melter system was developed by the KHNP-CRI(Korea Hydro & Nuclear Power Co., LTD Central Research Institute). Main equipment of the system consists of a dual mode plasma torch, a water cooling refractory melter, an waste feeder, a slag tapping equipment, etc. Especially, the high-technology of a dual mode... -
The Appreciation and Experience of Digital Images- Critical Review of Use of Digital Images in Museum Environment -
Bokyung Koo 한국조형교육학회 조형교육 29 Pages
한국조형교육학회 조형교육 2009, 제 34집 2 1-29 (29 pages)
Art museums are dedicated to fostering an understanding of works of art, to conducting research, and to delivering results to the public. As technologies has introduced new challenges for museums, museum professionals have embraced new interactive technologies for their promise to offer aesthetic, cultural, and contextual information on exhibits, and to boost museum attendance. Museum visitors, expecially children and young adults, have responded enthusiastically to interactive exhibits, even... -
Mathematics using multiple senses: Developing finger gnosis with three- and four-year-olds in an era of multi-touch technologies
Nathalie Sinclair, David Pimm 환태평양유아교육연구학회 Asia-Pacific journal of research in early childhood education 11 Pages
환태평양유아교육연구학회 Asia-Pacific journal of research in early childhood education 2015, Vol.9 No.3 7 99-110 (11 pages)
In this paper, we explore a richer sense of finger gnosis (finger knowledge) with respect to three- and four-year-olds’ interactions with a novel iPad application (TouchCounts), focusing on their responses to an “inverse subitising” task. The direct and tactile nature of their engagement with TouchCounts leads to a striking shift from incrementing using the index finger to deployment of several fingers all-at-once (in a cardinal touch gesture) to achieve a given target number that is then... -
Effect of the surface modification using MWCNTs with different L/D by two different methods of deposition on the IFSS of single carbon fiber-epoxy resin composite
Minerva L. Herrera-Sosa, Alex Valadez-Gonz?lez, Humberto V?zquez-Torres, Pierre G. Mani-Gonz?lez, Pedro J. Herrera-Franco 한국탄소학회 Carbon Letters 10 Pages
한국탄소학회 Carbon Letters 2017, Vol.24 3 18-27 (10 pages)
Multiwall carbon nanotubes (MWCNT) with two different (L/D) aspect ratios (7±2 μm/140±30 nm and 0.5?2 μm/8?15 nm) were surface treated using nitric acid (HNO3) and polyethyleneimine (PEI) prior to their deposition on carbon fibers (CF). Before the hierarchical reinforcement with CF-MWCNT, the CFs were treated with 3-glycidoxypropyltrimethoxysilane, a coupling agent (Z6040) and with poly(amidoamine) (PAMAM) a dendrimer containing an ethylenediamine core and amine surface groups. The MWCNT... -
Effects of synthesis pressure conditions on the preparation of graphene-like carbonaceous materials from organic liquid precursors by a solvothermal method
Kwan-Woo Kim, Byoung Suhk Kim, Sang Won Lee, Dong Chul Chung, Byung-Joo Kim 한국탄소학회 Carbon Letters 5 Pages
한국탄소학회 Carbon Letters 2017, Vol.23 11 74-78 (5 pages)
Carbon materials with at least one dimension of 1?100 nm are called carbon nanomaterials. A significant body of previous research in physics, chemistry and biology has demonstrated that the properties of nano-composites are significantly different than those of the bulk materials [1]. Some unique phenomena, such as the quantum tunneling effect, and surface effects, have also been observed, and attributed to the large surface area and small size of the carbon nanomaterials. It has been reported... -
Synthesis, characterization, and antibacterial performance of Ag-modified graphene oxide reinforced electrospun polyurethane nanofibers
Bishweshwar Pant, Mira Park, Rae-Sang Jang, Woo-Cheol Choi, Hak-Yong Kim, Soo-Jin Park 한국탄소학회 Carbon Letters 5 Pages
한국탄소학회 Carbon Letters 2017, Vol.23 3 17-21 (5 pages)
Polyurethane (PU) nanofibers containing graphene oxide (GO) and Ag doped functionalized reduced graphene oxide (Ag-RGO) were successfully prepared via the electrospinning technique. The uniform distribution of GO sheets along with Ag nanoparticle in the nano?bers was investigated by scanning electron microscopy and the elemental mapping technique. X-ray diffraction and thermal gravimetric analysis veri?ed the presence of GO and Ag in the bicomposite nano?brous mats. Antibacterial tests against... -
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... -
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)
The aim of the work was to investigate the thermo-electrical properties 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... -
Effects of maleic anhydride content on mechanical properties of carbon fibers-reinforced maleic anhydride-grafted-polypropylene matrix composites
Hyun-Il Kim, Woong Han, Woong-Ki Choi, Soo-Jin Park, Kay-Hyeok An, Byung-Joo Kim 한국탄소학회 Carbon Letters 8 Pages
한국탄소학회 Carbon Letters 2016, Vol.20 6 39-46 (8 pages)
In this work, the effects of maleic anhydride (MA) content on mechanical properties of chopped carbon fibers (CFs)-reinforced MA-grafted-polypropylene (MAPP) matrix composites. A direct oxyfluorination on CF surfaces was applied to increase the interfacial strength between the CFs and MAPP matrix. The mechanical properties of the CFs/MAPP composites are likely to be different in terms of MA content. Surface characteristics were observed by scanning electron microscope, Fourier transform infrared... -
Effect of fiber-matrix adhesion on the fracture behavior of a carbon fiber reinforced thermoplastic-modified epoxy matrix
H.J. Carrillo-Escalante, A. ?lvarez-Castillo, A. Valadez-Gonz?lez, P. J. Herrera-Franco 한국탄소학회 Carbon Letters 10 Pages
한국탄소학회 Carbon Letters 2016, Vol.19 6 47-56 (10 pages)
In this study, the fracture behavior of a thermoplastic-modified epoxy resin reinforced with continuous carbon fibers for two levels of fiber-matrix adhesion was performed. A carbon fiber with commercial sizing was used and also treated with a known silane, (3-glycidoxy propyl trimethoxysilane) coupling agent. Toughness was determined using the double cantilever test, together with surface analysis after failure using scanning electron microscope. The presence of polysulfone particles improved... -
Effects of electrochemical oxidation of carbon fibers on interfacial shear strength using a micro-bond method
Dong-Kyu Kim, Kay-Hyeok An, Yun Hyuk Bang, Lee-Ku Kwac, Sang-Yub Oh, Byung-Joo Kim 한국탄소학회 Carbon Letters 8 Pages
한국탄소학회 Carbon Letters 2016, Vol.19 4 32-39 (8 pages)
In this work, we studied the effects of electrochemical oxidation treatments of carbon fibers (CFs) on interfacial adhesion between CF and epoxy resin with various current densities. The surface morphologies and properties of the CFs before and after electrochemical-oxidation-treatment were characterized using field emission scanning electron microscopy, atomic force microscopy, Fourier transform infrared spectroscopy, X-ray photoelectron spectroscopy, and single-fiber contact angle. The... -
Mechanical interfacial adhesion of carbon fibers-reinforced polarized-polypropylene matrix composites: effects of silane coupling agents
Woong-Ki Choi, Hyun-Il Kim, Shin-Jae Kang, Young Sil Lee, Jong Hun Han, Byung-Joo Kim 한국탄소학회 Carbon Letters 6 Pages
한국탄소학회 Carbon Letters 2016, Vol.17 No.1 12 79-84 (6 pages)
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Flexural properties, interlaminar shear strength and morphology of phenolic matrix composites reinforced with xGnP-coated carbon fibers
Jong Kyoo Park, Jae Yeol Lee, Lawrence T. Drzal, Donghwan Cho 한국탄소학회 Carbon Letters 6 Pages
한국탄소학회 Carbon Letters 2016, Vol.17 No.1 5 33-38 (6 pages)
In the present study, exfoliated graphite nanoplatelets (xGnP) with different particle sizes were coated onto polyacrylonitrile-based carbon fibers by a direct coating method. The flexural properties, interlaminar shear strength, and the morphology of the xGnP-coated carbon fiber/phenolic matrix composites were investigated in terms of their longitudinal flexural strength and modulus, interlaminar shear strength, and by optical and scanning electron microscopic observations. The results were... -
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... -
Effects of pore structures on electrochemical behaviors of polyacrylonitrile-based activated carbon nanofibers by carbon dioxide activation
Hye-Min Lee, Hong-Gun Kim, Kay-Hyeok An, Byung-Joo Kim 한국탄소학회 Carbon Letters 6 Pages
한국탄소학회 Carbon Letters 2014, Vol.15 No.1 10 71-76 (6 pages)
Activated carbon nanofibers (ACNF) were prepared from polyacrylonitrile (PAN)-based nanofibers using CO2 activation methods with varying activation process times. The surface and structural characteristics of the ACNF were observed by scanning electron microscopy and X-ray diffraction, respectively. N2 adsorption isotherm characteristics at 77 K were confirmed by Brunauer-Emmett-Teller and Dubinin-Radushkevich equations. As experimental results, many holes or cavernous structures were found on...
