두 가족의 가족성 모야모야병 환자 4례

구자성,노재규,박성호,이한보,이용석,윤창호,송치성,송재우 대한신경과학회 1998 대한신경과학회지 Vol.16 No.4

관상동맥 스텐트 시술 후의 재협착에 관한 연구

김윤철,이정우,김보영,강정아,임대승,이민수,김정희,성보영,최성준,성인환,전은석 충남대학교 의과대학 지역사회의학연구소 2000 충남의대잡지 Vol.27 No.1

Coronary stent implacement is known as an effective treatment in the intimal dissection after percutaneous transluminal coronary angioplasty and the prevention of restenosis. However, In-stent restenosis still remains a major concern in clinical stenting. The stents were placed in 103 patients from July 1996 to March 1999 and performed follow-up coronary angiograms in 59(57.3%) patients. To identify the clinical, angiographic and procedurerelated variables 'which predict late restenosis within the stented artery, 59 patients(58.3±9.9, M:F= 41:18) were studied. The clinical characteristics of the patients were stable angina in 23(39.0%), unstable angina in 14(23.7%), acute myocardial infarction in 21(35.6%) and old myocardial infarction in 1(1.7%). Coronary stenting was performed in 1 patient(1.7%) for primary lesion, 50 patients(84.7%) for suboptimal results after PTCA, 6 patients(10.2%) for bail-out procedure, and 2 patients(3.4%) for restenotic lesions. All patients were treated with aspirin and ticlopidinc. The follow-up angiograms were obtained at 7±4 months. The overall in-stent restenosis rate was 27.1%. The coronary angiographic findings were 32 single vessel(54.2%), 19 two vessel(32.2%) and 8 three vessel disease(13.6%). The angiographic morphological characteristics were type A in 33(55.9%), type B in 14(23.7%), type C in 12(20. 3%) cases. Variables of 16 patients with restenosis were compared with those of 43 patients without restenosis. Previously known predictors for in-stent restenosis were multiple stenting, stenting for restenotic lesions, residual stenosis after stenting, stenting for total occlusion lesions, reference diameter, balloon to vessel ratio, acute gain and minimal luminal diameter after procedure, design and characteristics of stents, ostial lesion of aorta, high pressure method for stenting, lesion length, diabetes mellitus, size of artheroma, saphenous vein grafts, ulcerlating lesions and calcified lesions. In this study, Reference diameter before stenting(2.43±0.54mm vs. 2.88±0.65mm, p=0.016) and balloon-to-artery ratio(1.28±0.26 vs. 1.11±0.18, p=0.006) were predictors for in-stent restenosis. 1) The overall in-stent restenosis rate was 27.1%. 2) In the analysis of predictors for in-stent restenosis, there was no significant differences in clinical, angiographic factors between group with restenosis and without restenosis. But, Only reference diameter before stenting and balloon-toartery ratio were predictors of late in-stent restenosis. In conclusion, stenting is effective revascularisation method for selected patients with ischemic heart disease, and to minimize in-stent restenosis rate, stent implanting is achieved in a large vessel on the basis of an artery-to-stnet ration of 1:1, if possible.

中國의 民主化過程에 관한 考察

成基重,徐輔根 慶一大學校 1990 論文集 Vol.6 No.1

This study is to research the process of Democratization in the People's Republic of China. The purpose of the investigation of Democratization in China is to find a model of the democratic campaign in Communist Party States. The early chapters state the historical background of the democratic campaign in China by examining the Ming Fang Campaign in 1957, the Tiananmen Democratic Campaign in April 1976, the Spring of Peiking between 1978 and 1980, the Democratic Campaign between 1985 and 1987, and the 6.4 Tianamen Democratic Campaign. Here we can find that the democratic campaigns were getting serious, at last the 6.4 Tiananmen Democratic Campaign in 1989 was settled with many victims. Part III examines the features of a Socialist Democracy, the differences between a Liberal Democracy and a Socialist Democray, and the relations between a Socialist Democracy and "the Four Modernizations" in China. Part IV researches into the problems of democratization at the people's request in the democratic campaigns and examines Deng, Xiaoping's Policies of "a leftist politics and a rightist economy". Part V seeks for solutions of the democratic campaigns by examining the relations between the Four Modernizations and democratization, and by suggesting political democratization and pluralism for Chinese Democracy. The final part concludes that the problems of the democratic campaign can be solved by political democratization and by "the Four Modernizations" in compliance with the Chinese people's request. This combinnation of political democratization and, "the Four Modernzations" can make the Chinese both more comfortable and more affluent.

임플란트 hexagon 높이에 따른 임플란트와 주위 조직의 응력분포 평가

박성재,김주현,김소연,윤미정,고석민,허중보 대한치과보철학회 2012 대한치과보철학회지 Vol.50 No.1

PURPOSE. To analyze the stress distribution of the implant and its supporting structures through 3D finite elements analysis for implants with different hexagon heights and to make the assessment of the mechanical stability and the effect of the elements. MATERIALS AND METHODS. Infinite elements modeling with CAD data was designed. The modeling was done as follows; an external connection type ∅4.0 mm×11.5 mm OsstemUSII (Osstem Co., Pusan, Korea) implant system was used, the implant was planted in the mandibular first molar region with appropriate prosthetic restoration, the hexagon (implant fixture’s external connection) height of 0.0, 0.7, 1.2, and 1.5 mm were applied. ABAQUS 6.4 (ABAQUS, Inc., Providence, USA) was used to calculate the stress value. The force distribution via color distribution on each experimental group’s implant fixture and titanium screw was studied based on the equivalent stress (von Mises stress). The maximum stress level of each element (crown, implant screw, implant fixture, cortical bone and cancellous bone) was compared. RESULTS. The hexagonal height of the implant with external connection had an influence on the stress distribution of the fixture, screw and upper prosthesis and the surrounding supporting bone. As the hexagon height increased, the stress was well distributed and there was a decrease in the maximum stress value. If the height of the hexagon reached over 1.2 mm, there was no significant influence on the stress distribution. CONCLUSION. For implants with external connections, a hexagon is vital for stress distribution. As the height of the hexagon increased, the more effective stress distribution was observed. 연구 목적: 본 연구는 hexagon 높이에 따른 임플란트 각 부위와 주위 지지조직의 응력분포를 3차원 유한요소 해석을 통해 평가하여 hexagon 높이가 기계적 안정성에 미치는 영향을 평가하고자 시행되었다. 연구 재료 및 방법: 외측 연결 형태의∅L4.0 mm×11.5 mm USII (Osstem Co., Pusan, Korea) 임플란트 시스템을 이용하여 하악 제 1대구치 부위에 임플란트를 식립하여 보철 수복한 경우를 연구 모델로 가정하고 임플란트 고정체의 외측 연결부인 hexagon의 높이를 각각 0.0 mm, 0.7 mm, 1.2 mm, 1.5 mm로 적용한 CAD data를 유한요소 모형화하였다. ABAQUS 6.4 (ABAQUS Inc., Providence, RI, USA)를 이용하여 산출된 응력 값 중에서 등가응력을 기준으로 각 요소(상부 치관, 지대주 나사, 고정체, 치밀골, 해면골)에서 나타나는 최대 응력 값을 비교 하였다. 결과:외측 연결을 갖는 임플란트의 hexagon의 높이는 고정체, 지대주 나사, 상부 보철물 그리고 주위 지지골에 대해 응력 분산에 영향을 주었다. Hexagon의 높이가 증가할 수록 임플란트의 응력 분산은 더 잘 이루어졌으며, 최대 응력 값의 감소를 보였다. Hexagon의 높이가 1.2 mm 이상이 되면 응력 분포에 더 이상 크게 기여하지 않았다. 결론: 외측연결을 갖는 임플란트에서 hexagon은 응력 분산에 필수적인 요소이며 그 높이가 증가할수록 더욱 효과적인 응력의 분산이 나타났다.

地區單位計劃의 物理的 規制要素가 街路景觀에 미치는 影響에 관한 硏究

정성구,최민후,윤진보,신남수 대한건축학회 2004 대한건축학회논문집 Vol.20 No.10

Emphasis has recently been laid on the importance of street space that constitutes urban space in stimulating and strengthening the functions of the downtown area In most urban areas, however, street space has deteriorated so much that it reveals barrenness This situation is owing not to the lack of proper understanding about the importance of street space planning, but to the paucity of accumulated study on the correlation between the spatial consciousness of man as the subject of a street space evaluation on the one hand and the constituent elements as the object of spatial formation on the other District unit planning is a social system that is concerned with developing street space It maps out ideal urban space for better urban environment It also aims to better utilize urban space in accordance with the size and complexity of a city The purpose of this thesis is to examine the correlation between urban planning control elements regulating constituent elements of street space and the structure of man's psychological evaluation of the streetscape It explores the influence of physical regulatory elements on the streetscape, thus providing basic data and guidelines for planning a better streetscape It makes a psychological analysis of different applications of controlling elements by employing a semantic differential method and a CG simulation The procedure of my research is first to choose adjectival pairs that describe street space through bibliographical study and preliminary survey, and then to select physical regulatory elements concerning district Unit planning My study also shows the influence of the design control elements of distinct unit planning on the streetscape, by experimenting with those elements by means of CG simulation It examines variables on the axis of psychological factors according to the variation of regulatory elements and the degree of the influence of those variables

감귤 및 오렌지의 소비행태와 선호분석

고성보,강경선,현공남 韓國農業政策學會 1999 농업경영정책연구 Vol.26 No.2

行政節次의 法典化 : 우리 나라의 行政節次法案을 보고서 in view of the Administrative Procedure Bill

愼保晟 水原大學校 1988 論文集 Vol.6 No.-

The administrative procedure, as a central means of administrative process, can be said to be a procedure of the administrative activeties as an administrative authority motion. The administrative procedure seems to cause an unnecessary chasge to the administration, to be inefficient, and, as a result, to have difficulty in the administrative object performance, in the society with the tradition of European continent bureaucratic states. But in brief, it has an ideological and systematic meaning with administrative democratization as the central idea. But in brief, it has an ideological and systematic meaning with administrative democratization as the central idea. The development of it is on the ideological basis of both the principle of the natural justice in British Law and the American due process of law, in the world of British and American common law. But in European continent, before the Second World War, general administrative procedure laws were enacted and driven with a view to the strengthening of constitution administration, to promoting the efficiency of administrative management, and to expanding the relief of rights in many states, such as Austria, etc, from 1920's on, and often the Second World war, West Germany is successful in the epoch-making institutionalization of administrative procedure. Our government previously notified the enactment of the administrative procedure bill one years ago, but doesn't confirm it yet, for it seems to have many items to study and examine. During the period, the public hearing was held, and the criticism and the criticism and examination by some scholars was announced. This thesis is to study various problems of the administrative procedure bill by making a comparative study of foreign examples, and to intend helping to enact it to some extent.

균제도를 고려한 조명설계의 경제성 평가

오성보 제주대학교 공과대학 첨단기술연구소 2004 尖端技術硏究所論文集 Vol.15 No.1

Lighting must be visually comfortable and be responsive to the psychological and emotional needs of learners. The goal of educational facility lighting is to provide in a visual environment for both student and instructor that is supportive of the learning processes. This paper presents study on actual illumination environment of college and comparison of economical efficiency in order to figure out illumination problems. Furthermore, it attempts to suggest an optimum design of lecture room illumination through computer simulation. We try to evaluate economical efficiency of lighting design in lecture room under the illumination plan which is based on illumination maintenance and uniformity ratio that K.S. illumination standard sets.

대학 강의실의 최적 조명설계

오성보,김덕구 제주대학교 공과대학 첨단기술연구소 2003 尖端技術硏究所論文集 Vol.14 No.1

The goal of educational facility lighting is to provide in a visual environment for both student and instructor that is supportive of the learning processes. Lighting must also be visually comfortable and be responsive to the psychological and emotional needs of learners. This paper presents study on actual illumination environment of college in order to figure out illumination problems. Furthermore, it attempts to suggest an optimum design of Lecture room illumination through computer simulation. We try to attain models of optimum lighting design Lecture room illumination under the illumination plan which is based on illumination maintenance and uniformity ratio that K.S. illumination standard sets.

레이저 회절발법에 의한 네마틱상 MBBA의 비선형 광학성 동력학

윤보형,이일근,김성규 성균관대학교 기초과학연구소 1997 論文集 Vol.48 No.-

170㎛ 두께의 네마틱 MBBA film에 레이저 여기빔을 교차시켜 회절발을 형성시켰을 때 회절 신호를 시간적으로 추적하여 비선형 광학 동력학적 정보를 얻었다. 여기빔의 파장이 355nm이고 펄스의 세기가 10mJ/㎠일 때 회절신호의 시간적인 모양은 sub-ms, ms이 시간대에서 구분할 수 있는 4개 성분으로 구성되어 있다. 회절발의 간격이 8㎛일 때 가장 빠른 성분은 실험기기의 한계시간(~20ns)내에서 발생하고 약 10㎲시간으로 사라지는데 이는 계면의 열확산에 기인한다. 이 성분은 탐사빔의 편광에 크게 의존해서 나타난다. 네마틱상-등방상 상전이 지점에 접근하는 온도가 되면 이 편광의존성은 감소한다. 가장 약하고 느린 성분은 100ms의 시간대에서 관찰되어지는데 cis-MBBA의 질량확산이라 볼 수 있다. sub-ms 와 ms 시간대에서 회절신호의 지배적인 중간의 두 성분은 각각 지수함수적으로 증가하고 지수함수적으로 감소함을 보여준다. 두 성분의 원인은 각각 레이저 조사에 의한 온도변화로 인해 질서도의 파괴 및 회복, 레이저에 의해 형성된 광변형 상태에 의한 질서도의 파괴 및 회복에 기인한 것으로 판단된다. 온도가 상전이 점에 가까워지면 물질의 광학 비선형도는 다차회절이 눈으로도 관측될 정도로 증가한다. 다차회절신호를 휴리에 변환하여 회절발의 모양을 합성함으로써 주로 광변형상태의 존재가 다차회절의 원인, 즉 비이상적으로 높은 비선형 광학성의 중요한 원인으로 생각할 수 있다.