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용융금속에 의한 Ceramic Oxides에서의 Wetting에 관한 연구
이석권,임응극,김환,Lee, Seok-Keun,Lim, Eung-Keuk,Kim, Whan 한국세라믹학회 1983 한국세라믹학회지 Vol.20 No.4
The Wetting of fusion cast $Al_2O_3$ brick and $Al_2O_3 -ZrO_2$ brick by liquid Ag was studied by the sessile drop technique in Ar atmosphere. In this experiment the specimens were photographed per 2$0^{\circ}C$with increasing temperature from 96$0^{\circ}C$ melting point of Ag. And the method of photographing was carried out by shadow technique. The cosine of the contact angle increased linearly with increasing temperature in both systems. And the relation between the cosine of the contact angle and the temperature was Cos$\theta$=1.132+$0.75{\times}10^{-3}T$ for $Al_2O_3$ brick and Cos$\theta$=-1.706+$1.125{\times}10^{-3}T$ for $Al_2O_3 -ZrO_2$ brick In both systems the contact angle decreased as the surface of substrate became smoother. The work of adhesion which was 503.5ergs/$cm^2$ for $Al_2O_3$brick and 393.6 ergs/cm2 for $Al_2O_3 -ZrO_2$ brick at 96$0^{\circ}C$ increased parabolically with increasing temperature in both system.
이석권(Lee Seok-Gweon),이낙운(Lee Nak-Woon) 대한건축학회 2008 대한건축학회논문집 Vol.24 No.9
Applying objective and quantitative spatial analysis methods derived from Space Syntax theories, this study analyzes changing the characteristic of urban spatial configuration to urban sprawl and connects to the qualitative analysis of statistical data. The results are as follows. First, the Chun-Cheon city which had been developed to the south and north axis in the 60s and to the south and east axis in the 70s represented mono-nuclear configuration until the 80s. Even though the development of the new town in the 90s brought changes to the urban spatial configuration, the center of spatial configuration was resolved itself into the old downtown area through building a roads which had the organic relation to it in the 2000s. Second, although the Chun-Cheon city's old downtown has been declined due to the decrement of business and population rate, its importance and accessibility are keep still maintained Third, even though the new downtown has been built up because of the increment of business and population rate, it is not separated into the old and new downtown but integrated properly. Fourth, the result of analysis analyzed by using the principal road scheme drawing of 2020 master plan for chun-cheon city will be expected to improve the importance and accessibility of the old downtown.
가로활성화를 위한 가로경관 재생에 관한 설계 연구- 춘천시 소양로 문화가로를 중심으로
이석권(Lee, Seok-Gweon),조덕규(Cho, Dueg-kyu),이승철(Lee, Seung-Chul),황동근(Hwang, Dong-Keun) 한국도시설계학회 2021 도시설계 : 한국도시설계학회지 Vol.22 No.1
도시재생뉴딜사업은 건축물의 물리적 노화 등으로 인하여 쇠퇴한 구도심과 노후주거지를 활성화하기 위한 도시경쟁력을 높이고 일자리를 만드는 프로그램 위주로 진행하고 있어, 가로경관 재생은 예산상의 문제와 절차상의 문제로 주로 단편적인 보행환경과 간판정리를 통한 환경개선에 그치고 있는 시점이다. 또한 기존의 경관재생연구는 주로 설계대안 모색, 추진전략방안, 경관재생계획요소 도출 등의 설계전 단계이거나 설계논문의 경우는 재생방안 전략과 추진방안에 대한 대안이 주를 이루고 있어 대상지의 특성을 현실적으로 반영한 경관특화 설계는 거의 이루어지지 않고 있는 실정이다. 이러한 배경에서 상권 타켓이 중장년, 노년층으로 한정되어있는 지역의 가로경관을 활성화하기 위한 거리테마설정과 도시재생사업의 도시가로경관재생을 현실적이고 실질적인 경관 설계를 통하여 새로운 계획적 접근방법과 가로경관재생 방안을 모색하고자 한다. Since the Urban Regeneration New Deal Project focuses on programs intended to improve urban competitiveness and create jobs to revitalize old towns and deteriorated residential areas that have declined due to physical aging of buildings, streetscape regeneration is mainly limited to environmental improvement through fragmentary improvements of pedestrian environments and signboard organization due to budgetary and procedural issues. In addition, existing landscape regeneration studies are mainly in the pre-design stage, such as searching for design alternatives, the establishment of promotion strategies and plans, and the derivation of landscape regeneration plan elements, and thus landscape-specific designs realistically reflecting the characteristics of the target area are hardly made. Against this background, this study is intended to seek new planned approaches and streetscape regeneration plans through the setting of street themes in order to revitalize the streetscape of the area in which the targets of the commercial district are limited to middle-aged or elderly people, through realistic and practical landscape designs for streetscape regeneration under the urban regeneration project.
이석권 ( Seok Gweon Lee ) 한국사진지리학회 2015 한국사진지리학회지 Vol.25 No.4
본 연구에서는 우리나라 전체 전통마을의 분포, 입향시기, 보존 상태 등을 지리적인 관점에서 종합적으로 분석한 후 그 결과를 지도화 하였으며, 이를 과정에서 GIS(지리정보시스템) 기반의 공간분석 방법을 활용하였다. 전통마을의 위치는 지오코딩(geocoding)의 방법으로 구축하였고, 1910년대 지형도와 오늘날의 영상지도를 분석을 위한 기본도로 활용하였다. 연구 결과 우리나라의 전통마을은 경상북도에 편중되어 분포하고 있으며, 시대적으로는 대부분 조선전기와 중기에 형성되었다. 전통마을의 보존 상태는 마을에 따라 그 편차가 매우 크게 나타났는데, 일부 마을의 경우 전통마을의 흔적을 찾기 어려울 정도로 원형이 훼손되어 있었다. 이러한 결과로 볼 때 국가차원의 전통마을에 대한 체계적인 조사와 관리 계획의 수립이 필요하다. The study of the traditional village in South Korea investigated the effect of topographical changes on its distribution, establishment period, and preservation condition by using spatial analysis method based on GIS. Maps of sixty traditional villages produced by Japanese colonial government in 1910’s were used to build a point type spatial database of these traditional villages by using geocoding method to compare them with that of current information from Google Earth. The result presents that most of traditional villages had been densely distributed in Gyeongsanbuk-do area and mostly established in the beginning or the middle of Joseon dynasty. The preservation conditions were very varied that it was impossible, in several cases, to notice the sign of inhabitancy because of the damages. These results indicates the necessity of a systematic investigations and the establishment of the measures to manage for these traditional villages in government level.
이석권(Suk Kwon Lee),어완규(Wan Kyu Eo),최철준(Chul Joon Choi),조정휘(Chung Whee Choue),김권삼(Kwon Sam Kim),김명식(Myung Shick Kim),송정상(Jung Sang Song),배종화(Jong Hoa Bae) 대한내과학회 1990 대한내과학회지 Vol.39 No.2
N/A To access the hypothesis that left atrial enlargement as measured by echocardiography is the earliest sign of cardiac dysfunction in patients with systemic hypertension alone, we underwent M-mode echocardiography in 13 normal controls and 31 hypertensive patients who have neither quantitative evidence of left ventricular hypertrophy by noninvasive techniques, nor other causes of left atrial enlargement, such as coronary artery or valvular hart disease. The results were as follows: 1) There were no significant differences in left ventricular end-systolic and end-diastolic dimension, left ventricular mass, ejection fraction, or fractional shortening. 2) The left atrial dimension in the hypertensive patients (1.98±0.51cm) was significantly higher than normal control (3.27±0.46 cm) (p<0.05). 3) The left artial index was also higher in the hyper-tensive patients, 1.99±0.36cm/m² versus 2.42±0.39cm/m² (p<0.05), and the left atrial-to-aortic root dimension ratio was significantly higher in the hypertensive group, 1.10±0.14 versus 1.37±0.39 (p<0.05). The above results suggest that echocardiographic left atrial enlargement may be an early sign of hypertensive heart disease in patients with no other discernible causes of left atrial enlargement.