• 건축사
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• 통권598호
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• pp.118-119
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• 2019

• 대한원격탐사학회지
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• 제34권2_1호
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• pp.283-293
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• 2018

본 연구에서는 두개의 SAR 위성(ALOS-1과 COSMO-SkyMed) 영상에 PSInSAR 기술을 적용하여 각기 다른 센서 특성에 따른 변위 관측 성능의 차이를 분석하였다. 수치지형도 레이어로부터 건물 레이어를 추출하여, SAR 위성 영상으로부터 추출된 PS를 건물구조물과 지표면에서 추출되는 PS로 분류하고 각각 밀도 분석을 수행하였다. 연구지역에서 추출된 PS의 밀도는 ALOS-1 PALSAR의 경우 $0.023point/m^2$, COSMO-SkyMed는 $0.1point/m^2$로 ALOS-1에 비해 4배 이상의 PS가 추출되었다. 또한, 건물에서의 PS 밀도뿐만 아니라 지면에서의 관측 밀도도 크게 증가하였다. ALOS-1 PALSAR의 평균 변위속도는 ${\pm}1cm/yr$ 이내의 값을 갖는 반면 COSMO-SkyMed의 경우 ${\pm}0.3cm/yr$ 이내의 매우 안정적인 값을 보이고 있다. 비록 동일 기간의 자료를 사용한 것이 아니기 때문에 정량적인 비교는 어렵지만, L-band에 비해 X-band SAR 시스템의 변위관측 정밀도가 매우 높다고 할 수 있다. X-band와 L-band SAR 영상 비교분석을 통해 지반침하, 싱크홀과 같이 도심지 지표면에서 유용한 신호를 획득하는 것이 중요한 연구에서 PS 관측 밀도 및 변위 관측 정밀도를 고려하였을 때 X-band SAR 자료가 매우 효과적이다.

• 대한전기학회:학술대회논문집
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• 대한전기학회 1988년도 추계학술대회 논문집 학회본부
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• pp.210-213
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• 1988

A new and accurate expression to derive a window area is presented with a sequence for daylighting design using Daylight Factor Method process not in its classical point--by-point method but in lumen method as in artificial lighting design process to consider daylight in the early stage of a building design process. Accepting CIE Overcast Sky as the worst state with the lowest sky luminance, a user of a room can have more available daylight in his or her room. In the design process uniformity is checked to ensure reasonably even daylighting by comparing the depth of the room with the computed limiting depth. After these steps the shape and position of window is altered, of which the Sky Component of Daylight Factor under an Overcast Sky, SCo, is investigated and computed in Composite Simpson Multiple Integral so that a building designer or an analyst can choose the best shape and location that satisfies his/her taste and purpose of the room.

• 설비공학논문집
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• 제23권3호
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• pp.231-242
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• 2011

This study examines influences of a daylight dimming control system on the variation of indoor illuminance and lighting energy savings in a small office space. Field measurements and a series of computation were performed for typical types of sky conditions in summer. Results indicate that the daylight illuminance under clear and partly-cloudy sky were close to the target illuminance during a majority of time due to a higher ratio of window to wall. However, the target illuminance was not kept successfully due to the variation of photosensor signals which were strongly influenced by desktop illuminance. The system with partially-shielded conditions succeeded to keep target illuminance under clear sky conditions. The system failed under overcast sky conditions since the electric light output from fixtures caused excessive signals to photosensors due to insufficient daylight on a desktop. Unshielded and fully-shielded conditions were not recommended for effective controls of the systems. The influence of lighting fixtures on photosensors should be minimized to achieve successful lighting controls by daylight dimming systems.

• 대한건축학회논문집:구조계
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• 제36권4호
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• pp.135-142
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• 2020

The new method for evaluating the displacement tolerance of sky-bridges with pin-roller type supports was proposed considering both return period of phase difference between connected buildings and geometrical characteristics of skybridge. Because displacement tolerance is relative value, which is most affected by the phase difference of the connected buildings, the dynamic response of these building with time history analysis should be evaluated. However, the initial phase could not be specified, so the result of displacement tolerance would be varied with respect to initial value. Thus, the tolerance can be reasonably evaluated SRSS calculation with design displacements based on statistical approach and of each building. In addition, the geometrical characteristics of sky-bridge should be considered because the transverse displacement of sky-bridge span causes the shear deformation of the bridge and longitudinal displacement tolerance cannot release the shear deformation. Therefore, the some pin-end support in sky-bridge should have longitudinal displacement tolerance to accommodate the shear deformation. By resolving this shear deformation, it is possible not only to accommodate transverse displacement, but also to avoid the complicated joint details such as both pot bearing and guided supports with shear key.

• 한국조명전기설비학회지:조명전기설비
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• 제3권1호
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• pp.58-63
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• 1989

이등분한 실의 주광율(Daylight Factor)의 비를 규제도의 지수로서 Lumen Method와 같이 정하고, 이를 만족하는 실의 깊이를 검토한 후, 설계 평균 주광율을 만족하는 창의 면적을 구하였다. 본 논문에서 제안한 창의 면적 자체가 다른 벽면의 면적 변화에 영향을 주고 있음을 고려하지 않은 종래의 방법을 개선하였다. 이후 주광율 요소 중 가장 지배적인 양인 운천공으로부터 입사하는 성분(SCo: Sky Component from overcast Sky)의 분포를 창의 위치와 형태를 변화시켜 조사, 평가하였다.

• 한국콘크리트학회:학술대회논문집
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• 한국콘크리트학회 2006년도 춘계학술발표회 논문집(I)
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• pp.450-453
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• 2006

Coupling adjacent building with supplemental damping devices is a developing method of reduced structural response due to wind and seismic excitations. The philosophy is to allow structures, vibrating at different frequencies, to exert control forces upon one another to reduce the overall responses of the system. This paper studies the effect of installing vibration control devices of two high rise building structures(49 stories and 42 stories) connected by sky-bridge. According to the analysis results the use of sky-bridge can be effective in increasing damping ratio of the system.

• 국제초고층학회논문집
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• 제6권3호
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• pp.271-277
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• 2017

Safety, livability, and efficiency are the three prominent problems of tall buildings, which are also the severe challenges to designers. We proposed the idea of building the sky town to solve these problems, which can be summarized in two sentences, one is tall building multi-storised, and another one is vertical facilities municipal-infrastructurised. The tall building can be horizontally cut into several multi-storey buildings by some large platforms. The platform extends a certain width to block the fire from spreading. Tall buildings are connected together as a group. One of them is a traffic core, which is used for vertical transportation and MEP. It connects to traffic center such as metro, while most of the other tall buildings' cores can be very much released, so as to achieve maximum efficiency of floor usable area and to give good traffic organization. By combining traffic core, platforms, and multi-storey buildings' inner traffic, a transportation network is formed. Finally, we refer to the design of Raffles City Chongqing to make a sketch of sky town.

• 대한치과교정학회지
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• 제33권5호
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• pp.391-398
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• 2003

견인골 신장술은 막내골화를 유도하는 조직공학으로, 두개안면기형 영역에서 치료는 지난 10년간 지속되었다. 본 연구는 하악지를 절단한 후 구강내 견인장치를 사용하여 안모 비대칭을 치료한 증례이다. 안모 비대칭 환자를 치료하는데 섬세하게 견인골 신장술을 이용하면 성장기와 성장이 끝난 환자에게서 효율적인 치료방법으로 생각된다.

• 동력기계공학회지
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• 제6권2호
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• pp.33-39
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• 2002

Commercial vehicles are mostly subjected to relatively rougher ground environment than passenger vehicles. Many driver's seats of commercial vehicles have suspension system with spring and dampers. Then, impact or vibrative forces transmitted from the vehicle to the driver can be attenuated. This study deals with a ride evaluation method using sky-hook control algorithm for the suspension dampers. Vibration amplitude transmissibilities were compared between passive dampers and semi-active dampers with sky-hook control method.