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이정회,박찬호,한상훤,김태균,윤기현,최동진,문봄내,양윤식,손창학 인제대학교 백병원 2001 仁濟醫學 Vol.22 No.2
Dermatofibrosarcoma protuberans(DFSP) is an uncommon cutaneous tumor, which is characterised by slow invasive growth, marked tendency of local recurrence after excision and infrequent metastasis. Initially, most DFSPs are noticed as plaque like areas of cutaneous thickening and frequently have a reddish at the margins. As the tumor increases in size it is typically described as a raised, firm, multinodular mass that is fixed to the overlying skin, but movable over the deeper tissues. The authors report a case of recurrent DFSP, developed on the right anterior chest of a 32-year-old man. There was no evidence of metastasis.
정회경(鄭會卿) 한국비교정부학회 2005 한국비교정부학보 Vol.9 No.2
The purpose of this study is to analyze the significance of media education and to compare media education policy of Korea with leading countries like British, Canada and the U.S.A. The thesis of media education has been emphasized with the development of media technologies for growing the abilities to understand and use the media exactly in everyday life of child and youth. In many countries including Korea, media education programs about newspaper, broadcasting, advertising, films etc. have been attempted in school, society and at home. Especially media education in British, Canada and the U.S.A. is very successful from various points of view and gives us many advices. Above all things media education within school is the most important. Therefore this study suggested alternative ideas for media education policy in Korea as follows emphasizing of understanding a concept media literacy for child and youth, organizing of its curriculum and learning methods, cultivating their special teachers, developing various materials and training facilities about media, and building up the evaluation system gradually in school environment.
Structural Break in the Real Exchange Rates: The Asian Crisis
정회상,김영용 대외경제정책연구원 2009 East Asian Economic Review Vol.13 No.1
This study estimates the break point in the residual variance and in the propagation mechanism of the real exchange rates at about the time of the Asian crisis that occurred in 1997, and provides some explanations for the breaks. The breaks in the residual variance increased the volatility of the real exchange rates, which given the overall effects of common adverse shocks to the countries seems to be reinforced by the sudden withdrawal of Japanese commercial banks’ lending to the region. And the subsequent breaks in the propagation mechanism reduced the volatility, which reflects the change in the government policy stance to result in smoothing the pace of appreciation. In addition, the breaks in the nominal exchange rates rather than in the price ratios are mainly responsible for the breaks in the real exchange rates.
정회상,신병석,권구주 한국정보과학회 2005 정보과학회논문지 : 시스템 및 이론 Vol.32 No.8
surface reconstruction is to make the original geometry of 3D objects from 2D geometric information. Barequet's algorithm is well known and most widely used in surface reconstruction. It tiles matched regions first, then triangulates clefts using dynamic programming. However it takes considerably long processing time while manipulating complex model. Our method tiles a simple region that does not have branches along minimally distant vertex pairs at once. When there are branches, our method divides contour lines into a simple region and clefts. We propose a fast and simple method that calculates medial axes using a minimum distance in cleft region. Experimental results show that our method can produce accurate models than the previous method within short time. 재구성은 2차원 기하정보로 부터 3차원 물체의 형상을 복원하는 방법이다. 기존의 표면 재구성 알고리즘 중 많이 사용되는 Barequet의 방법은 정합되는 부분을 먼저 타일화 하고, 정합되지 않는 부분인 클레프트는 동적 계획법으로 타일화 한다. 그러나 이 방법은 클레프트를 처리하는 시간이 오래 걸리기 때문에 모델이 복잡할 경우 수행속도가 저하되는 단점이 있다. 본 논문에서는 분기가 없는 단순영역을 한 번의 연산으로 외곽선의 최단거리 정점을 따라 타일화 하고, 분기가 있는 경우에는 정합이 잘되는 기본영역과 정합이 되지 않는 클레프트로 나눈다. 클레프트는 최단거리 정점들의 중점을 이용하여 간단하고 신속하게 타일화 하는 방법을 제안한다. 실험결과 기존 방법보다 메쉬 재구성 속도와 정확도가 높아진 것을 확인할 수 있었다.