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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)
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 resolution transmission electron microscope (HRTEM), high-resolution scanning... -
Improved rat spinal cord injury model using spinal cord compression by percutaneous method
Wook-Hun Chung, Jae-Hoon Lee, Dai-Jung Chung, Wo-Jong Yang, A-Jin Lee, Chi-Bong Choi, Hwa-Seok Chang, Dae-Hyun Kim, Hyo Jin Chun 대한수의학회 Journal of Veterinary Science 7 Pages
대한수의학회 Journal of Veterinary Science 2013, 제 14권 제 3호 13 329-335 (7 pages)
Here, percutaneous spinal cord injury (SCI) methods using a balloon catheter in adult rats are described. A balloon catheter was inserted into the epidural space through the lumbosacral junction and then inflated between T9-T10 for 10min under fluoroscopic guidance. Animals were divided into three groups with respect to inflation volume: 20 μL (n = 18), 50 μL (n = 18) and control (Fogarty catheter inserted but not inflated; n = 10). Neurological assessments were then made based on BBB score,... -
The effect of applying a head-weight device on cervical angle and pain of neck muscles
Jin-Hong Kim, Jong-Gun Kim, Kwang-Sun Do, Jong-eun Yim 물리치료재활과학회 Physical Therapy Rehabilitation Science 5 Pages
물리치료재활과학회 Physical Therapy Rehabilitation Science 2016, 제 5권 제 2호 8 101-105 (5 pages)
head-weight device on healthy adult. Design: Cross-sectional study. Methods: This study was conducted with 21 healthy adult male and female who voluntarily agreed to participate in this study after being informed of the purpose and method of this study. After measuring the cervical angle and pain threshold of levator scapular muscle, subject was instructed to walk for 5 minutes on a treadmill at a speed of less than 5 km/h while wearing after wearing head-weight device of 0.5 kg. Then, cervical... -
Effects of sit-to-stand imagery group training on balance performance in individuals with chronic hemiparetic stroke
Jeong-won Lee, Su-jin Hwang, Sin-ae Ahn 물리치료재활과학회 Physical Therapy Rehabilitation Science 7 Pages
물리치료재활과학회 Physical Therapy Rehabilitation Science 2016, 제 5권 제 2호 2 63-69 (7 pages)
Objective: To evaluate the effects of sit-to-stand (STS) imagery group training (IGT) on STS movement and balance performance for chronic hemiparetic stroke. Design: Randomized controlled trial. Methods: A total of 30 people with chronic hemiparetic stroke (15 for STS-IGT group and 15 for control) were recruited in this study. The STS-IGT group participated in a videotape-based STS-IGT for 30 minutes a day, five days a week for six weeks, while the control group watched a documentary on... -
Effect of different contraction methods on pelvic floor muscle contraction in middle-aged women
Ji-Seon Kim, Jong-Duk Choi, Won-Seob Shin 물리치료재활과학회 Physical Therapy Rehabilitation Science 5 Pages
물리치료재활과학회 Physical Therapy Rehabilitation Science 2015, 제 4권 제 2호 7 103-107 (5 pages)
be the first method for PFM dysfunction. This study demonstrated correct PFMs contraction among commonly used different contraction methods for PFMT. Design: Cross-sectional study. Methods: In this study, nineteen middle-aged (40-70 years) women participated. To evaluate PFM function, ultrasonography was used to measure the distance of the bladder base movement. The distance of the PFM movements were calculated at rest and during the other contractions. The following four different contraction... -
Students’ attitudes toward online learning during the pandemic era -focusing on practice courses at a university of education
Lee Yun-Jung 경인교육대학교 교육연구원 The Journal of Education 18 Pages
경인교육대학교 교육연구원 The Journal of Education 2020, Vol.3 No.2 4 59-76 (18 pages)
Through a survey conducted among 64 students at a Gyeongin university of education during the COVID-19 pandemic, this research explores students’ attitude toward online learning, compares them with previous research outcomes, invites student suggestions for better learning, and analyzes their responses to find any intrinsic structure of learning performance. In a similar way to previous research, this study produces the pros (strength) and cons (weakness) of online education as follows. First,... -
Patterns of Antimicrobial Resistance and Transfer of Resistance Genes in Tetracycline-resistant Escherichia coli Isolated from Beef Cattle in South Korea
Seung Won Shin, Kuastros Mekonnen Balaynehe, Myung hwan Jung, Han Sang Yoo 대한수의학회 대한수의학회 학술대회발표집 2 Pages
대한수의학회 대한수의학회 학술대회발표집 춘계학술심포지움 44 160-161 (2 pages)
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Use of a domestic Korean black goat (Capra hircus coreanae) with its chest crayon-harnessed in detecting estrus of Himalayan tahrs (Hemitragus jemlahicus)
Hwanyul Yong, Eunsong Lee* 대한수의학회 Journal of Veterinary Science 6 Pages
대한수의학회 Journal of Veterinary Science 2014, 제 15권 제 3호 12 427-432 (6 pages)
The reliability of a Korean black goat (Capra hircus coreanae) to detect estrus in Himalayan tahrs (Hemitragus jemlahicus) for an artificial breeding program was investigated. Estrus in six female Himalayan tahrs was synchronized using fluorogestone acetate (FGA) sponges. Thirteen days later, 200 IU of PMSG and 100 IU of hCG were injected before removing the sponges and simultaneously injecting 5 mg of PGF2α the next day. Penetration of the cervical canal and the thickness and location of red... -
Extent of Mycobacterium bovis infection in dairy cattle herds subject to partial culling as determined by an interferon-gamma assay
Sungmo Je, Un-chang Yeo, Taeksun Song, Ki-cheol Kim, Sung-Yun Park, Man-Jung Kim, Sang-Nae Cho* 대한수의학회 Journal of Veterinary Science 7 Pages
대한수의학회 Journal of Veterinary Science 2014, 제 15권 제 2호 12 259-265 (7 pages)
The interferon-gamma (IFN-γ) assay is employed as a complementary diagnostic test for bovine tuberculosis (BTB) in many countries. To simplify this assay, we established a 96-well plate format using the ESAT-6 and CFP-10 antigens and then employed it to determine the extent of Mycobacterium (M.) bovis infection in dairy herds with a history of BTB outbreaks in a country where only selective culling is practiced. The sensitivity and specificity of this IFN-γ assay were 85.9% and 100%,... -
The long-term clinical stability of implants placed with ridge splitting technique
Jae-Min Yoon, Young-taek Kim, Yong-ju Jang, Jung-chul Park, Seong-ho Choi, Kyoo-sung Cho, Chang-sung Kim 대한치과이식임플란트학회 Journal of Dental Implant Research 8 Pages
대한치과이식임플란트학회 Journal of Dental Implant Research 2011, 제 30권 1호 1 1-8 (8 pages)
Purpose: The purpose of this study is to evaluate the clinical stability of implants placed with a ridge splitting technique through the investigation of the survival rate and marginal bone loss of implants. Methods: 34 implants were placed in 20 patients with the ridge splitting technique. 8 out of 34 implants were placed with the nonsubmerged approach. 26 out of 34 implants were placed with the submerged approach. Guided bone regeneration (GBR) and bone graft were applied in 13 implants.... -
Evaluation of Streptomyces saraciticas as Soil Amendments for Controlling Soil-Borne Plant Pathogens
Pei-Hsuan Wu, Tung-Tsuan Tsay, Peichen Chen 한국식물병리학회 The Plant Pathology Journal 11 Pages
한국식물병리학회 The Plant Pathology Journal 2021, 37권 6호 9 596-606 (11 pages)
Soil-borne diseases are the major problems in mono cropping. A mixture (designated LTM-m) composed of agricultural wastes and a beneficial microorganism Streptomyces saraceticus SS31 was used as soil amendments to evaluate its efficacy for managing Rhizoctonia solani and root knot nematode (Meloidogyne incognita). In vitro antagonistic assays revealed that SS31 spore suspensions and culture broths effectively suppressed the growth of R. solani, reduced nematode egg hatching, and increased... -
Isolate Virulence and Cultivar Response in the Winter Wheat: Pyrenophora tritici-repentis (Tan Spot) Pathosystem in Oklahoma
Kazi A. Kader, Robert M. Hunger, Mark E. Payton 한국식물병리학회 The Plant Pathology Journal 8 Pages
한국식물병리학회 The Plant Pathology Journal 2021, 37권 4호 3 339-346 (8 pages)
Prevalence of tan spot of wheat caused by the fungus Pyrenophora tritici-repentis has become more prevalent in Oklahoma as no-till cultivation in wheat has in- creased. Hence, developing wheat varieties resistant to tan spot has been emphasized, and selecting pathogen isolates to screen for resistance to this disease is critical. Twelve isolates of P. tritici-repentis were used to inocu- late 11 wheat cultivars in a greenhouse study in split- plot experiments. Virulence of isolates and cultivar... -
Biological Control of Gom-chwi (Ligularia fischeri) Phytophthora Root Rot with Enterobacter asburiae ObRS-5 to Suppress Zoosporangia Formation and Zoospores Germination
Dayeon Kim, Sang Yeob Lee, Seong Ho Ahn, Ji Hee Han, Jin Woo Park 한국식물병리학회 The Plant Pathology Journal 11 Pages
한국식물병리학회 The Plant Pathology Journal 2020, 36권 3호 5 244-254 (11 pages)
Gom-chwi (Ligularia fischeri) is severely infected with Phytophthora drechsleri, the causal organism of Phy- tophthora root rot, an economically important crop disease that needs management throughout the cultiva- tion period. In the present study, Phytophthora root rot was controlled by using bacterial isolates from rhizo- sphere soils collected from various plants and screened for antagonistic activity against P. drechsleri. A total of 172 bacterial strains were isolated, of which, 49 strains... -
Computer-Aided Drug Discovery in Plant Pathology
한국식물병리학회 The Plant Pathology Journal 14 Pages
한국식물병리학회 The Plant Pathology Journal 2017, 33권 6호 1 529-542 (14 pages)
Control of plant diseases is largely dependent on use of agrochemicals. However, there are widening gaps between our knowledge on plant diseases gained from genetic/mechanistic studies and rapid translation of the knowledge into target-oriented development of effective agrochemicals. Here we propose that the time is ripe for computer-aided drug discovery/design (CADD) in molecular plant pathology. CADD has played a pivotal role in development of medically important molecules over the last three... -
Isolation and Genomic Characterization of the T4-Like Bacteriophage PM2 Infecting Pectobacterium carotovorum subsp. carotovorum
한국식물병리학회 The Plant Pathology Journal 7 Pages
한국식물병리학회 The Plant Pathology Journal 2015, 31권 1호 11 83-89 (7 pages)
In order to control Pectobacterium carotovorum subsp. carotovorum, a novel virulent bacteriophage PM2 was isolated. Bacteriophage PM2 can infect 48% of P. carotovorum subsp. carotovorum and 78% of P. carotovorum subsp. brasilliensis but none of atrosepticum, betavasculorum, odoriferum and wasabiae isolates had been infected with PM2. PM2 phage belongs to the family Myoviridae, and contains a large head and contractile tail. It has a 170,286 base pair genome that encodes 291 open reading frames... -
Mini-Review : Current Insights into Research on Rice stripe virus
한국식물병리학회 The Plant Pathology Journal 11 Pages
한국식물병리학회 The Plant Pathology Journal 2013, 29권 3호 1 223-233 (11 pages)
Rice stripe virus (RSV) is one of the most destructive viruses of rice, and greatly reduces rice production in China, Japan, and Korea, where mostly japonica cultivars of rice are grown. RSV is transmitted by the small brown plant-hopper (SBPH) in a persistent and circulative-propagative manner. Several methods have been developed for detection of RSV, which is composed of four single-stranded RNAs that encode seven proteins. Genome sequence data and comparative phylogenetic analysis have been... -
Optical sensitivity of DNA-dispersed single-walled carbon nanotubes within cement composites under mechanical load
Jin Hee Kim, Inkyu Rhee, Yong Chae Jung, Sumin Ha, Yoong Ahm Kim 한국탄소학회 Carbon Letters 7 Pages
한국탄소학회 Carbon Letters 2017, Vol.24 12 90-96 (7 pages)
We demonstrated the sensitivity of optically active single-walled carbon nanotubes (SWCNTs) with a diameter below 1 nm that were homogeneously dispersed in cement composites under a mechanical load. Deoxyribonucleic acid (DNA) was selected as the dispersing agent to achieve a homogeneous dispersion of SWCNTs in an aqueous solution, and the dispersion state of the SWCNTs were characterized using various optical tools. It was found that the addition of a large amount of DNA prohibited the... -
Effects of cross-linking methods for polyethylene-based carbon fibers: review
Kwan-Woo Kim, Hye-Min Lee, Jeong-Hun An, Byoung-Suhk Kim, Byung-Gak Min, Shin-Jae Kang, Kay-Hyeok An, Byung-Joo Kim 한국탄소학회 Carbon Letters 24 Pages
한국탄소학회 Carbon Letters 2015, Vol.16 No.3 2 147-170 (24 pages)
In recent decades, there has been an increasing interest in the use of carbon fiber reinforced plastic (CFRP) in aerospace, renewable energy and other industries, due to its low weight and relatively good mechanical properties compared with traditional metals. However, due to the high cost of petroleum-based precursors and their associated processing costs, CF remains a specialty product and as such has been limited to use in high-end aerospace, sporting goods, automotive, and specialist... -
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)
The element carbon has been used as a source of energy for the past few hundred years, and now in this era of technology, carbon has played a significant and very prominent role in almost all 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... -
Overlook of current chemical vapor deposition-grown large single-crystal graphene domains
Kyung Tae Park, Taehoon Kim, Chong Rae Park 한국탄소학회 Carbon Letters 11 Pages
한국탄소학회 Carbon Letters 2014, Vol.15 No.3 1 151-161 (11 pages)
Exceptional progress has been made with chemical vapor deposition (CVD) of graphene in the past few years. Not only has good monolayer growth of graphene been achieved, but large-area synthesis of graphene sheets has been successful too. However, the polycrystalline nature of CVD graphene is hampering further progress as graphene property degrades due to presence of grain boundaries. This review will cover factors that affect nucleation of graphene and how other scientists sought to obtain large... -
Study on lowering the percolation threshold of carbon nanotube-filled conductive polypropylene composites
Seung Bin Park, Moo Sung Lee, Min Park 한국탄소학회 Carbon Letters 8 Pages
한국탄소학회 Carbon Letters 2014, Vol.15 No.2 8 117-124 (8 pages)
and compression molding. The percolation threshold (Φc) of the MWCNT-PP composites was most successfully lowered using the mechanofusion process than with any other mixing method (2-5 wt%). The mechanofusion process was found to enhance formation of a percolation network structure, and to ensure a more uniform state of dispersion in the CPCs. The immiscible-polymer blends were prepared by melt mixing (internal mixer) poly(vinylidene fluoride) (PVDF, PP/PVDF, volume ratio 1:1) filled with MWCNT. -
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... -
Carbon Doping of TiO2 for Visible Light Photo Catalysis - A review
K. Palanivelu, Ji Sun Im, Young-Seak Lee 한국탄소학회 Carbon Letters 11 Pages
한국탄소학회 Carbon Letters 2007, Vol.8 No.3 6 214-224 (11 pages)
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Effects of the ASR-embedded Dictionary App Use on College Students in EFL Pronunciation Class
Hyun Il-sun 이화여자대학교 교과교육연구소 교과교육학연구 14 Pages
이화여자대학교 교과교육연구소 교과교육학연구 2018, 제 22권 6호 4 400-413 (14 pages)
This study explored the effects of the use of ASR-embedded dictionary app in providing corrective feedback on EFL college students pronunciation. During the six-week instruction, students of the ARS-based feedback group (n = 20) practiced their English pronunciation via the ARS-embedded dictionary app and those of the Peer-feedback group (n = 20) worked in pairs. Comparisons were made between pre- and post-test scores and the students responses to a follow-up questionnaire were analyzed by... -
A Systematic Review and Meta-Analysis of Applicability of Web-Based Interventions for Individuals with Depression and Quality of Life Impairment
Danbi Yang, Ji-Won Hur, Yoo Bin Kwak, Sung-Won Choi 대한신경정신의학회 Psychiatry Investigation 8 Pages
대한신경정신의학회 Psychiatry Investigation 2018, 제 15권 제 8호 3 759-766 (8 pages)
Objective_The purpose of this meta-analysis was to determine the applicability of web-based treatment programs for individuals with depression and quality of life impairments. Methods_We conducted database and manual searches using imprecise search-term strategy and inclusion criteria. Research published from 2005 to December 2015 was included in this study. Upon review, a total of 12 published papers on web-based intervention for individuals with depression were assessed eligible for this... -
치아-임프란트 지지 가철성 국소의치에서 하악골에서 발생하는 응력의 광탄성학적 분석
정다운, 심혜영 대한치과이식임플란트학회 Journal of Dental Implant Research 19 Pages
대한치과이식임플란트학회 Journal of Dental Implant Research 2009, 제 28권 2호 2 10-28 (19 pages)
하악의 대구치는 저작의 중추적인 역할을 하는 부위로 맹출 이후 가장 많은 교합력을 받는 부위이다. 이로 인해, 구강내에서 가장 먼저 상실되는 치아이기도 하다1,2). 하악에서 양측성으로 구치부가 탈락하여 후방연장 국소 의치를 제작하는 경우 많은 임상적인 문제점이 발생한다. 유리단 부위 치조제의 계속적인 흡수, 구치부의 불안정 으로 인한 교합의 부조화, 연조직의 통증 등이 발생하게 된다3-6). 이는 후방연장 국소의치의 역학적인 불리함에 서 기인한다고 할 수 있다7). 유리단 부위가 길어질수록 mechanical advantage는... -
Hydrogen Peroxide Prompted Lignification Affects Pathogenicity of Hemi-biotrophic Pathogen Bipolaris sorokiniana to Wheat
Ajit Poudel, Sudhir Navathz, Ramesh Chand, Vinod K. Mishra, Pawan K. Singh, Arun K. Joshi 한국식물병리학회 The Plant Pathology Journal 14 Pages
한국식물병리학회 The Plant Pathology Journal 2019, 35권 4호 1 287-300 (14 pages)
Spot blotch caused by Bipolaris sorokiniana has spread to more than 9 million ha of wheat in the warm, humid areas of the Eastern Gangetic Plains (EGP) of South Asia and is a disease of major concern in other similar wheat growing regions worldwide. Differential lignin content in resistant and susceptible genotypes and its association with free radicals such as hydrogen peroxide (H2O2), superoxide (O2 -) and hydroxyl radical (OH-) were studied after inoculation under field conditions for two... -
Investigation of Genetic Diversity of Fusarium oxysporum f. sp. fragariae Using PCR-RFLP
한국식물병리학회 The Plant Pathology Journal 8 Pages
한국식물병리학회 The Plant Pathology Journal 2017, 33권 2호 6 140-147 (8 pages)
intergenic spacer, translation elongation factor1-α, and β-tubulin genes of the pathogens and four restriction enzymes: AluI, HhaI, HinP1I and HpyCH4V. Regarding results, there were diverse patterns in the three gene regions except for the β-tubulin gene region. Correlation analysis of strawberry cultivation region, cultivation method, variety, and phenotype of isolated pathogen, confirmed that genetic diversity depended on the classification of the cultivated region. -
Microwave Irradiation-assisted RNA Extraction from Woody Tissues for Plant Virus Detection
한국식물병리학회 The Plant Pathology Journal 3 Pages
한국식물병리학회 The Plant Pathology Journal 2010, 26권 3호 14 286-288 (3 pages)
mechanical equipment has been the preferred method for obtaining high yields of total RNA; this method, however, is both time-consuming and expensive. Additionally, homogenization may generate excessive endogenous RNases, polyphenolics, and other substances that reduce the quality and quantity of RNA. In this study, we describe the microwave irradiation-assisted RNA extraction (MIRE) technique which, without tissue disruption and homogenization, allows for the cost-effective and rapid generation... -
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... -
Semantic Key Pre-Distribution Protocol For Multi-Phase Wireless Sensor Networks
Carlos Ramos, Zita Maria Almeida do Vale 인문사회과학기술융합학회 예술인문사회융합멀티미디어논문지 12 Pages
인문사회과학기술융합학회 예술인문사회융합멀티미디어논문지 2011, 제 1권 제 1호 3 17-28 (12 pages)
Chrono-Gait Image (CGI), to describe the spatio-temporal walking pattern for human identification by gait. The CGI temporal template encodes the temporal information among gait frames via color mapping to improve the recognition performance. Our method starts with the extraction of the contour in each gait image, followed by utilizing a color mapping function to encode each of gait contour images in the same gait sequence and compositing them to a single CGI. We also obtain the CGI-based real... -
“교실붕괴” 이후 신자유주의 교육담론의 형성과 그 저항 - 홈스쿨링에 관한 담론분석을 중심으로 -
한국교육사회학회 교육사회학연구 2006, 제 16권 제 1호 4 77-105 (29 pages)
이 연구에서 나는 소위 “교실붕괴” 이후 “교육”담론이 어떻게 신자유주의적으로 형성되었는지를 주요 일간지의 홈스쿨링 관련 기사들을 비판적으로 분석하여 한국사회의 역사적 맥락에서 그것이 의미하는 바를 드러내고자 하였다. 비트겐슈타인의 언어놀이 이론과 푸코의 담론 이론에 이론적 기 반을 두고 페어클로의 구체적인 분석방법을 활용하여 기사들을 분석한 결과는 다음과 같다. “교실 붕괴” 담론과 함께 ‘감옥으로부터의 탈출’로 자신의 의미 공간을 확보하기 시작한 홈스쿨링은 곧 서 로 다른 담론으로 분화되는데,... -
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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Facile preparation of self-assembled wool-based graphene hydrogels by electron beam irradiation
Mira Park, Bishweshwar Pant, Jawun Choi, Yong Wan Park, Chohye Lee, Hye Kyoung Shin, Soo-Jin Park4, Hak-Yong Kim 한국탄소학회 Carbon Letters 6 Pages
한국탄소학회 Carbon Letters 2014, Vol.15 No.2 11 136-141 (6 pages)
Three dimensional self-assembled graphene hydrogels were easily fabricated by electron beam irradiation (EBI) using an aqueous solution of wool/poly(vinyl alcohol) and graphene oxide (GO). After exposure to various levels of EBI radiation, the highly porous, self-assembled, wool-based graphene hydrogels were characterized using scanning electron microscopy and Fourier-transform infrared spectroscopy; to determine the gel fraction, degree of swelling, gel strength, kinetics-of-swelling analyses... -
Preparation of pitch from pyrolized fuel oil by electron beam radiation and its melt-electrospinning property
Jin-Young Jung, oung-Seak Lee 한국탄소학회 Carbon Letters 7 Pages
한국탄소학회 Carbon Letters 2014, Vol.15 No.2 10 129-135 (7 pages)
aromatic compounds with similar molecular weight. The diameter of melt-electrospun pitch fibers under applied power of 20 kV decreased 53% (4.7 ± 0.9 μm) compared to that of melt-spun pitch fibers (10.2 ± 2.8 μm). It is found that E-beam treatment for reforming could be a promising method in terms of time-savings and cost-effectiveness, and the melt-electrospinning method is suitable for the preparation of thinner fibers than those obtained with the conventional melt-spinning method. -
Mechanical and thermal properties of MWCNT-reinforced epoxy nanocomposites by vacuum assisted resin transfer molding
Si-Eun Lee, Seho Cho, Young-Seak Lee 한국탄소학회 Carbon Letters 6 Pages
한국탄소학회 Carbon Letters 2014, Vol.15 No.1 4 32-37 (6 pages)
Multi-walled carbon nanotube (MWCNT)/epoxy composites are prepared by a vacuum assisted resin transfer molding (VARTM) method. The mechanical properties, fracture surface morphologies, and thermal stabilities of these nanocomposites are evaluated for epoxy resins with various amounts of MWCNTs. Composites consisting of different amounts of MWCNTs displayed an increase of the work of adhesion between the MWCNTs and the matrix, which improved both the tensile and impact strengths of the... -
이러닝(E-learning)에서의 성인학습자 중도탈락 관련 참여 동기 설문지 개발
전주성 한국성인교육학회 Andragogy Today 24 Pages
한국성인교육학회 Andragogy Today 2005, Vol.8 No.4 4 123-146 (24 pages)
이 연구는 Keller (1987)의 ARCS 교수설계 모델의 네 가지 조건 (Attention, Relevance, Confidence, Satisfaction)에 기반 해 이러닝에 참여한 학습자(기업체 근무 자)들의 이러닝 중도탈락에 관련한 \"동기 스케일(motivation scale)\"을 개발하는 데 그 목적이 있었다. 연구자는 이를 위해 설문지 개발을 위한 몇 단계의 엄격한 절차를 따랐 고, 최종적으로 223명의 유효한 표집을 얻어 자료 분석에 이용하였다. 이 연구에서는 두 가지 모델 즉, (1) 상호 연관되어 있지만 각기 독립적인 하위 네 영역으로 (Attention, Relevance,... -
e-러닝에 참여한 성인학습자의 중도탈락 예측을 위한 베스트 모델 탐색
전주성 한국성인교육학회 Andragogy Today 23 Pages
한국성인교육학회 Andragogy Today 2006, Vol.9 No.4 10 301-323 (23 pages)
이 연구의 목적은 어떤 조합의 변인들이 e-러닝에 참여한 성인학습자들의 중도탈락을 가장 잘 예측하는지를 밝히는데 있다. 이 연구를 위해서 Keller(1987)의 동기설계모델의 네 가지 핵심조건인 참신성, 관련성, 자신감, 만족감 등에 근거해 설문도구를 개발하였다. 표집은 20 시간짜리 업무 관련 e-러닝 코스에 자발적 혹은 의무적으로 등록한 총 259명의 회사원들이다. 수 집된 자료는 통계 프로그램인 SPSS와 SAS를 이용해 분석되었다. 분석 결과 는 다음과 같다. (1) 개인 배경 변인들(수강한 e-러닝 코스의 수, 나이, 성별, 교육... -
국내외 가상교육 운영시스템 사례를 통한 교수-학습지원 기능
강명희, 이혜경 한국기업교육학회 기업교육과 인재연구 27 Pages
한국기업교육학회 기업교육과 인재연구 2000, 제 2권 제 1호 2 31-52 (27 pages)
본 연구에서는 현재 개발되어 있는 가상교육 운영시스템의 지원 기능 비교을 위해 국내 6개, 미국 10개의 운영시스템을 조사, 분석하였다. 운영시스템의 지원 기능 분석을 위해 첫째, 지원영역을 학습자, 교수자, 운영자로 나누었고. 둘째, 학습자 지원영역에서는 학습지원, 비실시간 상호작용 지원, 실시간 상호작용 지원 그리고 학습 보조기능으로 나누었고, 교수자 지원영역에서는 코스관리, 코스제작, 자료관리, 강의 보조기능으로 나누었고, 운영자 지원영역에서는 시스템 설치, 시스템 관리, 사용자 지원 기능으로 나누어... -
아프가니스탄 폭탄테러공격에 관한 지리-공간 분석
한국경호경비학회 시큐리티연구 2012, 제 33호 10 261-290 (30 pages)
2001년에 있었던 OEF(Operation Enduring Freedom)이후로 아프가니스탄은 글로 벌 테러리즘과의 전쟁에서 중요한 전쟁터의 하나가 되어왔다. 지난 10년 동안 미국 정부와 동맹국들과 아프가니스탄 정부는 테러리스트들과 무장 항쟁자들(insurgents)을 분쇄하고 동시에 전국적으로 기능하는 통치시스템을 구축하기 위해 상당한 노력을 기울여 왔다. 하지 만, 그러한 목표는 여전히 그 끝이 보이지 않는 것 같다. 아프가니스탄에서의 테러와 무장항 쟁은 여전히 활발히 전개되고 있으며 골칫거리가 되고 있다. 따라서 이 연구는 전쟁으로...
