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유근주,송규상,이충식 충남대학교 의과대학 지역사회의학연구소 1988 충남의대잡지 Vol.15 No.2
An experimental study was carried out to investigate the effects of irradiation of Ga-As laser on the Wound healing process in rabbits. The thigh muscles of the posterior legs of the rabbits were exposed and four identical scalpel incisions were made. After a 125 HZ, 1,000 HZ, and 10, 000 HZ of Ga-As laser were irradiated on the wound, respectively, and consecutive biopsies were performed. The results were as follows: 1. Capillary and fibroblastic proliferations were mere rapidly and prominently observed in the laser irradiated tissues compared with the control tissue. 2. Deposition of collagn was more pronounced in the laser treated tissues than those of the control tissues. 3. Regenerative changes of the muscular tissue occurred more earlier in the laser irradiated tissues than the control tissues.
전신적인 피부병변으로 발현한 모세포성 NK세포 림프종 1예
이근욱,윤탁,김동완,김태유,허대석,박영주,김노경 대한내과학회 2004 대한내과학회지 Vol.66 No.4
저자들은 다른 장기의 침범 없이 전신적인 피부 병변만으로 발현한 모세포성 NK세포 림프종 1예를 국내에서 처음으로 경험하였기에 이를 문헌고찰과 함께 보고하는 바이다. Reports of blastic natural killer (NK)-cell lymphoma are rare. In previous reports, primary cutaneous blastic NK-cell lymphomas were even rarer. In asian patients, most CD56+ lymphomas are classified as nasal type extranodal NK/T-cell lymphoma and mostly associated with the presence of Epstein-Barr virus (EBV) and have an aggressive clinical course. Few cases of blastic NK-cell lymphoma were reported previously in Korea but there was report about blastic NK-cell lymphoma initially presented as disseminated skin lesions without any other organ involvement. We report such a young patient who was treated by systemic chemotherapy.
서순근,조유희 한국품질경영학회 2002 품질경영학회지 Vol.30 No.4
The fatigue curve with estimated parameters represents the estimate of the median or mean life at a given applied stress. But, in order to assist a designer in making decisions regarding the fatigue failure mode, it is common practice to construct a design curve on the lower or safe side of data. In this study, to overcome the limitations(i.e., no runout, equal variance, and quality of the approximation, etc) of Shen, Wirsching, and Cashman's method which suggested the approximate design curve for nonlinear models using tolerance interval constructed by Owen's method, an algorithm to find design curves under the fatigue model using a parametric bootstrap method, is proposed and illustrated with multiple fatigue data sets.
車柔蓉,韓源根 弘益大學校 科學技術硏究所 2001 科學技術硏究論文集 Vol.12 No.-
We investigated the structure of Gold and Copper using first-principles total energy calculation within local density approximation. In the future, we will study the structure of Au-Cu alloys using first-principles total energy calculation. We will specialize in various nature of compound structures. In addition, we would apply our results to thin film growth.
무선 인터넷 기반의 POI 정보 서비스를 위한 개인 항법 시스템 브라우저 구현
이근,엄유열,최명환,박홍성 강원대학교 정보통신연구소 2002 정보통신논문지 Vol.6 No.-
This paper presents a design and implementation of a Personal Navigation System Browser for POI services for portable PDA(Personal Digital Assistants). Personal Navigation System(PNS) service is a location based geographic information service for PDA or cellular telephone. Point of Interest(POI) is the information about a user's personal interests. PNS Browser is a PNS application which receives and displays POI information as well as location based geographic information service. In this paper, a PNS Browser is proposed and its implementation is presented that contains CHtml Web Browser and POI manager as well as the Map display by using wireless internet technology.
서순근,조유희 한국품질경영학회 2003 품질경영학회지 Vol.31 No.2
The fatigue has been considered to the most important failure mode where optimal design or reliability prediction of the machinery in aircraft, atomic reactors, and structure systems, etc.. is required. When the statistical analysis of fatigue life data is performed, some difficulties are present because of the following facts : nonlinear relationship, heteroscedastic data, large scatter in the data, censored data (runouts), and existence of fatigue limit. To find the S-N curve models that characterize fatigue strength better, this research compares existing fatigue curve models developed recently in terms of the residual mean square and the estimate of fatigue limit, etc. for various fatigue data sets.
변근주,최홍식,유동우 연세대학교 산업기술연구소 1986 논문집 Vol.18 No.1
The objective of this study is to suggest an effective optimization algorithm for the minimum cost design of R.C. wall, using a complete stress-strain relationship. Since strength and steel ratio are usually considered at the preliminary stage in the design of R.C. wall, the strenght constraints and the side constraints (lower limits of steel ratio and other code requirements) are used as design constraints. A cost objective function for the minimum cost design is obtained by considering the cost of concrete, steel bars, and forming. Optimization is achieved by using heuristic method. It has been observed that minimum steel ratio is the optimum steel ratio, for the compression failure wall; and optimum steel ratio is increased with the design moment for the tension failure wall.
서유성,박형근,최형석,김연일,이병일 순천향의학연구소 2002 Journal of Soonchunhyang Medical Science Vol.8 No.2
In case of the occurrence of osteonecrosis at three or more anatomical location, it is defined as multifocal osteonecrosis, but still any king of study with references hasn't been reported in Korea. The patient who had admitted due to the pain in both knee joints, both hip joints and left ankle joint and we diagnosed as multifocal osteonecrosis by using bone scan and magnetic resonance imaging. To relieve right knee joint and left hip joint pain, we perfomed arthroplasty. Here we present one case report of multifocal osteonecrosis through analysis by patient's history and hematologic examination and provide a review of the literature.