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윤영식 동명정보대학교 2002 건축도시연구소 저널 Vol.1 No.-
The purpose of this study was to analyze the changes of housing types according to the change in historical and urban situation and to improve the housing types for the dwelling quality and residential environment in Busan. The results of this study were as follows; the housing types changed rapidly from single detached house type to collective dwelling forms year after year. There were not enough variable housing types to improve the quality of lifestyle and to generated a range of dwelling alternatives. The unique historical and urban situation in Busan might not influenced to the change of the housing types. The housing types must be considered in the planning and production of dwelling units to give user the dwelling quality and to generate a range of dwelling alternative. The type of dwelling unit will be considered and developed under the geological and urban situation. It makes not only the dwelling alternatives but also urban quality vailable.
윤영식 동명정보대학교 1998 東明情報大學校論文集 Vol.1 No.-
The study is concerned in description and analysis of the residential environment of Haeundae New town in Pusan. It aims how the neighborhood is formed through commercial facilities and public facilities, in terms of their location, sort and size, distribution of space, approachment. Those elements have influence on the formation of community area and residential environment. Finally, this study identifies the concepts and elements in the community area in the new-built residential environment for improving the quality of the life.
집합주거에서 거주 다양화를 위한 주거동의 진입방법 및 단위세대 통합적 조합방법에 관한 연구
윤영식 동명정보대학교 2002 건축도시연구소 저널 Vol.1 No.-
The purpose of this study is to analyze the housing form according to the combination of unit types to suggest the probability of variable life. The combination of access method, core locations and unit types may generate a range of dwelling alternative. These elements must be considered in the planning and production of dwellings to satisfy user's needs and preference. They indicated alternatives to involve more dwellers in the creation of their own living environments to improve the quality of dwelling. In the past, there have tended to look upon the problems of the negative aspect of the unified house building. As describing the newly aroused forms of urban housing complex through the combination of access and unit types in recent decades in Seoul and it's suburb, it defines forces which have determined present and future housing's form. The results of this study are as follows; as economical situation and household income changed, the development of the individualized housing form in the planning and production should be needed. The range and type of dwelling unit allow for different flavor of user. It can also encourage dwelling alternatives, choice and diversity of demander. The demander's needs and preference aroused new dwelling forms make the creating of individual lifestyles available. In the future, housing must be produced to meet the demand of people.
담체의 표면거칠기와 전단응력이 미생물 부착에 미치는 영향
박영식,송승구,이채남,최윤찬 부산대학교 환경문제연구소 1995 環境硏究報 Vol.13 No.-
The propose of this paper was to examine the effect of surface roughness and shear stress of support medium on the development of biofilm in a rotating biological contactor. The surface roughness of PMMA as a support media was adjusted to 0.4, 0.8, 1.2, and 3㎛, respectively. Shear stress was varied with speed of rotating biological contactor. At low shear stress, bacterial attachment was not varied greatly with surface roughness. But at increased shear stress, bacterial attachment was changed sharply with surface roughness.
김영식(Kim Young-Seek),김민준(Kim Min-Jun),윤석광(Yoon Seok-Gwang),김상우(Kim Sang-Woo),이정윤(Lee Jung-Yoon),김길희(Kim Kil-Hee) 대한건축학회 2012 大韓建築學會論文集 : 構造系 Vol.28 No.4
This paper investigates the structural performance of the concrete spirally reinforced with high-strength reinforcement. The main test parameters were the yield strength of transverse reinforcement and cross sectional shape of specimen. 12 cylindrical specimens with a diameter of 150㎜ and a height of 300㎜ and 12 square specimens with a width 133㎜ and a height of 266㎜ were cast and tested under monotonic concentric compression. To evaluate the confinement effect of spiral reinforcement, the specimens tested in this study were designed to have no cover concrete. The observed results showed that the strength and ductility of circular specimens were improved as the yield strength of steel spirals increased. However, the confinement effect of square specimens was not significant than that of circular specimens.
광대역 컨포멀 위상 배열 안테나의 빔형성 열화 보상 알고리즘
윤호준(Ho-Joon Yoon),이강인(Kang-In Lee),남상욱(Sang-Wook Nam),정용식(Young-Seek Chung),윤영중(Young-Joong Yoon) 한국전자파학회 2017 한국전자파학회논문지 Vol.28 No.6
본 논문은 광대역 컨포멀 위상배열 안테나 빔형성 시 발생하는 조향오차를 보상하고, 목적하는 빔형성을 위한 알고리즘을 제안한다. 광대역 빔 조향을 위하여 본 연구에서는 TTD(True Time Delay) 방식을 채택하였으며, 긴 시간의 지연을 위하여 기판 회로상에 구현을 하였다. 빔 조향 오차의 원인은 배열 안테나 소자간의 상호간섭, 지연회로 기판의 분산 특성 및 디지털 제어에 의한 quantization 오차 등이 있다. 본 논문에서 TTD 회로의 분산 및 quantization 오차는 절대적인 지연시간보다 배열소자간의 상대적인 지연시간 차이를 최적화 하는 방향으로 분산 및 quantization 오차의 영향을 최소화 하였다. 제안된 조향오차 보상기법을 2~4 ㎓ 대역의 컨포멀 위상배열 구조에 적용하여 측정값과 비교하여 그 타당성을 검증하였다. In this paper, we propose an algorithm for the wideband beamforming in a conformal phased array antenna by compensating the errors. For the wideband beamforming, we used the True Time Delay(TTD), which was fabricated on the RF circuit board to obtain long delay lines. Beamforming errors in the conformal array antenna are the mutual coupling between the array elements, the dispersive error in the TTD circuit, and the quantization error by the digital control. We apply the compensation algorithm to the conformal phased array antenna of wideband 2~4 ㎓, and verify the usefulness by comparing the results with the experiment results.