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배성완,강주혁,문주흠 목포대학교 스포츠산업 연구소 2006 스포츠 산업연구소 논문집 Vol.5 No.-
The purpose of this research is to work out the injury time, injury place, injury part, cause of injury, medical treatment, preventions against weight throwers at national physical education high schools and management and protection of them and advance of competence. As a result of questioning total 148 persons of shot putters (M20, F17), discus throwers(M21, F20), javelin throwers(M22, F20) and hammer throwers(M18, F10) who are registered at the Korean Amateur Athletic Federation, we come to the following conclusions. 1. As a result of comparison and analysis of the training programme where weight throwers were frequently injured by the event, the meaningful difference was obtained. Javelin throwers were injured most frequently while throwing training. 2. As a result of comparison and analysis of the meaningful difference of part which injury happened most frequently while throwers trained usually, the meaningful difference was obtained. Javelin throwers’ elbow injury was very frequent. 3. As a result of comparison and analysis of most frequently injured part by the event while weight throwing, the meaningful difference was obtained. Discus throwers’ waists were mostly injured while throwing. 4. As a result of comparison and analysis of frequently injured part by the event while weigh throwing training, the meaningful difference was obtained. Injury in waist part happened more frequently in rotary motion event than rectilineal motion event while weight throwing. 5. As a result of comparison and analysis of the event that throwers were injured frequently by sex while weight training, the meaningful difference was obtained. Women weight throwers were injured while jump squat training. 6. As a result of comparison and analysis of treatment period after injury by sex, the meaningful difference was obtained. It took women 4 weeks more to cure up and it was not short. 7. That difference that keep in mind method that can protect Shanghai when saw as exercise injury experience according to comparative analysis result by item appeared and rectilineal movement item selected most by method that mental power can protect Shanghai both item beam egg number It Eotda. 8. As a result of comparison and analysis of the season when thrower were injured frequently by experience, the meaningful difference was obtained. Throwers with below 1-4 year experience were injured frequently in summer. 9. As a result of comparison and analysis of the training time when weight throwers were injured frequently by result, the meaningful difference was obtained. Weight throwers who have never won the prize were injured frequently while training in the afternoon. 10. As a result of comparison and analysis of throwing motion when weight throwers were injured frequently by experience while throwing training, the meaningful difference was obtained. Throwers with below 1-4 year experience were injured frequently on waist twisting motion in the finish motion.
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배영호,이현우,홍성태,서기영,차영문,권순걸 慶南大學校 附設 工業技術硏究所 1992 硏究論文集 Vol.10 No.-
이 논문은 MOSFET로 구성된 등가 Half-bridge형 고주파공진형 인버어터에 대해 기술하고 있다. 시분할 방식에 의한 게이트회로를 구성하여 구동함으로써 출력단에는 두개의 인버어터에서 동작되는 순시위상이 합성되어 있어 나타나므로 부하단 출력주파수는 소자의 수위칭주파수에 대해 두배가 되고 수위칭 손실이 경감되어 소자의 평균전류가 증가한다. This paper proposes a high frequency resonant inverter consisting of equivalent half bridge model using MOSFET. In this paper time-sharing control method is applied. as a result the output frequency is two times as high as switching frequency of device and average current of device is increased because of decreasing switching loss.
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열공형과 비열공형 피질하 혈관성 치매에서 위험인자의 차이에 관한 비교 연구
배희준,정지향,유경호,나덕렬,김상윤,최경규,양동원,손의주,이상도,김재우,박경원,김응규,이재홍,박미영,한일우,함동석,최문성,하충건,최성혜,이애영,이병철,한설희 대한치매학회 2003 Dementia and Neurocognitive Disorders Vol.2 No.2
Backgrounds and Objectives: Vascular dementia is a group of dementing disoders arising from various stroke syndrome. Among these. subcortical ischemic vascular dementia (SIVD) is regarded as a relatively distinct clinical entity. However, MRI patterns of SIVD are not homogenous. In some patients, lacunes are dominant, and in others, subcortical white matter changes are. This study was designed to compare risk factor profiles between SIVD with and without multiple lacunes. Methods: We divided 47 subjects (22 males, mean age. 68 years) recruited from VADAPET (Multicenter Trial For Evaluation Of The Changes In the PET Images Of Subcortical Vascular Dementia Patient) study into two groups one with more than 5 lacunes in deep gray matter (lacune group) and the other with 5 or less(non-lacune group) Clinical characteristics and laboratory findings of two groups were compared. Results: Nineteen of 47 patients (40%) belonged to the lacune group. The lacune and non-lacune groups d d not differ in the following variables: age, hypertension, diabetes mellitus, hyperlipidemia heart disease, history of stroke or TIA, history of trauma or major surgery, family history of hypertension stroke, or dementia, age at diagnosis of dementia, body mass index, white blood cell count, ESR, CRP, fibrinogen, hemoglobin A1C, total cholesterol. LDL cholesterol creatinine, proteinuria, glucosuria, and microhematuria. However, male sex, smoking alcohol. hemoglobin, and HDL cholesterol were possibly associated more with lacune group SIVD than with non-lacune group (p<0 1) Multivariate analyses revealed that smoking, hemoglobin, and HDL cholesterol were independent predictors of SIVD with multiple lacunes Conclusion: Our study suggests that SIVD with multiple lacunes may be significantly different in smoking habits hemoglobin, and HDL cholesterol from SIVD without multiple lacunes.
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한국 상장기업의 IT자본과 노동 및 비IT자본의 대체성에 관한 연구
문성배,홍동표 한국은행 2004 經濟分析 Vol.10 No.2
본 연구는 2000-2002년까지의 한국 164개 상장기업에 대한 자료를 이용하여 IT자본과 노동 및 비IT자본간의 대체탄력성(elasticity of substitution)을 측정하였다. 특히 생산요소간 대체성의 척도로서 널리 쓰이고 있는 Allen 대체탄력성(Allen elasticity of substitution)의 문제점을 지적하고 Allen 대체탄력성 뿐만 아니라, 가격탄력성, Morishima 대체탄력성(Morishima elasticity of substitution), 그리고 shadow 대체탄력성(shadow elasticity of substitution)을 측정하였다. 본 연구의 추정결과에 따르면, 첫째, IT자본은 노동과 비IT자본에 대한 대체재(substitute)인 것으로 나타났으며, 우리나라 기업들의 경우 IT자본이 노동을 대체하는 정도보다 IT자본이 비IT자본을 대체하는 정도가 큰 것으로 나타났다. 또한 비제조업보다는 제조업에서, 정보화가 덜 된 기업들보다는 정보화가 많이 된 기업들에서 IT자본의 노동과 비IT자본에 대한 대체성이 강한 것으로 나타났다. This paper examines the substitutability of IT capital for other inputs, such as labor and non-IT capital, using the data on 164 Korean firms from the period of 2000-2002. Estimating various elasticities of substitution between IT capital and other inputs, we find that IT capital is a substitute for labor and non-IT capital. In particular, we find that IT capital is more substitutable for non-IT capital than for labor. We also find that the estimated elasticities of substitution between IT capital and other inputs are higher for manufacturing firms than for non-manufacturing firms, and higher for IT-intensive firms than for less-IT-intensive firms.
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유사체액에서의 전기화학적 처리가 티타늄 표면의 인산갈슘 흡착에 미치는 영향
조국현,김문영,송광엽,배태성,이민호 大韓齒科器材學會 2002 대한치과재료학회지 Vol.29 No.3
This study was performed to examine the effect of electrochemical treatment on the precipitation of apatite-like calcium phosphate in a simulated body fluid. Titanium plates of 20×20×1 ㎣ in dimensions were polished sequentially from #600 to #2,000 emery paper and one surface of each specimen was received an additional polishing sequence through 0.1㎛ alumina paste. To improve the bioactivity of titanium plates, they were electrochemically treated at 100 mA for 20 min in an electrolyte containing the calcium and phosphate ions, and the Hanks' solution with pH 7.4 at 36.5℃ for 30 days, and the surfaces were examined with X-ray diffractometer(XRD), scanning electron microscope(SEM) and X-ray photoemission spectroscopy(XPS). Precipitation of calcium phosphate and CaO were observed on the electrochemically treated titanium surface in a simulated body fluid after treatment at 600℃. Precipitation of calcium phosphate was densified and coarsened with increasing the temperature of the electrolyte solution in the range of 20-80℃. The calcium phosphate contained phosphate in the form of Po₄^3-, HPO₄^2-, and H₂PO₄^-.
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지식파급과 공동연구개발: 정보통신 제조기업에 대한 실증분석
문성배 ( Sung Bae Mun ),윤영미 ( Young Mi Yoon ),전현배 ( Hyun Bae Chun ) 정보통신정책학회 2011 정보통신정책연구 Vol.18 No.1
본 연구는 과학기술정책연구원의 ``2005년 제조업 부문 기술혁신조사`` 자료를 이용하여 정보통신(information and communications technology 또는 ICT)제조기업의 공동연구개발을 결정하는 요인을 실증분석하고 타산업과의 차별적 요인이 존재하는지를 검토하였다. 특히 비혁신기업이 추정표본에서 제외되기 때문에 발생할 수 있는 표본선택편의를 보정하기 위해서 표본선택 프로빗모형을 이용하여 실증분석을 실시하였다. 추정결과에 따르면, ICT기업은 기술지식의 유입(incoming spillovers)이 공동연구개발 결정에 미치는 효과가 타 산업보다 큰 것으로 나타났다. 또한, ICT기업은 기술흡수능력이 높을수록 공동연구를 수행할 확률이 높아지는 것으로 나타났다. 반면, 기술지식의 유출(outgoing spillovers)을 나타내는 전유성은 공동연구개발활동을 수행할 확률에 큰 영향을 미치지 않는 것으로 나타났다. 기술개발비용, 기술 상업화의 불확실성, 기술정보 부족 등 기술개발의 제약요인 등도 ICT기업의 공동연구개발 결정에 큰 영향을 주지 않는 것으로 나타났다. In this paper, we investigate the determinants of R&D cooperation in Korean information and communications technology (ICT) manufacturing firms. In particular, we focus on the differing role of determinants in R&D cooperation between ICT firms and non-ICT firms. Using data from the 2005 Korean Innovation Survey, we employ a probit model with sample selection to correct a possible sample selection problem arising from firms` decision on R&D cooperation and innovation. Since non-innovative firms which make up almost half of the sample firms in the Korean Innovation Survey, results based on a probit model utilizing only innovative firms could be biased. As expected, we find positive correlations between the decisions of firms` R&D cooperation and innovation. Based on estimation results, we find that incoming spillovers of knowledge have a positive and significant effect on the probability of ICT firms` engaging in R&D cooperation. In contrast, the incoming spillovers do not have a significant effect on the R&D cooperation of low-tech firms. The results suggest that the role of incoming spillovers in R&D cooperation could be different among firms according to their technology characteristics. Our results also indicate that the firms` absorptive capacity positively influences the likelihood of cooperating in R&D. On the other hand, appropriability turns out to be not an important factor for R&D cooperation. Constraints on innovation such as innovation cost, uncertainty, and the lack of information on technology seem to be not significantly related with the probability of R&D cooperation.
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