• 대한원격탐사학회지
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• 제23권3호
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• pp.199-209
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• 2007

Traditionally, aerial images have been used as main sources for compiling topographic maps. In recent years, lidar data has been exploited as another type of mapping data. Regarding their performances, aerial imagery has the ability to delineate object boundaries but omits much of these boundaries during feature extraction. Lidar provides direct information about heights of object surfaces but have limitations with respect to boundary localization. Considering the characteristics of the sensors, this paper proposes an approach to extracting buildings from lidar and aerial imagery, which is based on the complementary characteristics of optical and range sensors. For detecting building regions, relationships among elevation contours are represented into directional graphs and searched for the contours corresponding to external boundaries of buildings. For generating building models, a wing model is proposed to assemble roof surface patches into a complete building model. Then, building models are projected and checked with features in aerial images. Experimental results show that the proposed approach provides an efficient and accurate way to extract building models.

• 한국조경학회지
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• 제39권5호
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• pp.48-56
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• 2011

본 연구는 국립공원 내부 혹은 경계에 연접하고 있는 집단시설지구 내의 건축물 층고 규제 기준을 정량화 된 합리적 높이 기준으로 개선하는데 목표를 두고 진행되었다. 전국 국립공원의 집단시설지구 건축물의 높이를 시뮬레이션함으로써 주요 조망점으로부터 건축물 상단을 지나는 조망선이 배후산지의 몇 부 능선까지 도달하는지를 분석하는 과정을 거쳤다. 분석 결과로 내륙의 산악형 국립공원 내부 혹은 경계에 입지하는 시설지구와 배후 산지가 있는 해안형 국립공원내의 시설지구의 경우, 3부 능선 보전을 목표로 하게 될 때 최대 허용 건축물 높이를 8.82m로 산정하는 것이 합리적이라는 결론을 얻을 수 있었다. 층수로 환산하면 3~3.5층 정도라고 할 수 있다. 이는 건축물 최대 허용 높이를 규정하는 것으로 랏지, 코티지 등을 제외한 호텔 등의 숙박시설에 적용하는 것이 바람직할 것으로 사료된다. 다만 해안해상형 중에서 배후 산지가 존재하지 않는 경우는 별도의 기준을 적용할 필요가 있다. 모든 집단시설지구에 동등한 일률적 기준을 적용하게 되면 지역 특성을 고려한 경관관리가 어렵다는 점과 조망점의 위치, 조망점 선정방법의 차이, 조망각도 차이 등의 변수에 따라 기준 적용 편차가 있을 수 있음을 고려하여야 한다. 향후 높이규정과 함께 각 지구별 경관계획에 의해 해당 지구의 자연환경에 적합한 차별화된 경관관리 전략이 필요하다.

• 한국재난정보학회 논문집
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• 제5권1호
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• pp.66-74
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• 2009

As building heights increase, so do these challenges in Korea. High-rise buildings present a variety of challenges to fire safety and protection. The fire protection technology in our country is still on a weak situation which is mainly due to the lack of concerns by the government, companies and citizen. This paper provides general guidance regarding fire-related property protection system for high-rise building performance based design. The importance of high-rise building in of the number of occupants, the value of property, and the a catastrophic loss would have on the community all warrant an increased level of protection and life safety. Because, We have to prepare a new spacial code and standard guidance for fire protection at the stage of the high-rise building design.

• Korean Journal of Geomatics
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• 제1권1호
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• pp.7-13
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• 2001

Geospatial Information Systems (GIS) have been employed to systematically manage and design land use in urban areas. This has increased the need for more accurate vector and raster data. In Korea, l/l,000-scale digital maps are used as vector data for the facility management in urban areas. This has increased the need for large scale orthoimages. Orthoimages generated from aerial imagery can provide accurate information, making possible the more effective city management. However, there is a large problem in using the orthoimages, i.e., currently available conventional orthoimages have not been generated based on Digital Elevation Model (DEM) that takes into account the building heights. So this causes the displacements of building image in large scale orthoimages. The present study is an attempt to generate the large scale orthoimages based on building DEM. The semiautomatic building extraction method can detect building outlines by mouse clicking on either building roofs or corners. Building DEM, based on the outline and calculated building height, was used to produce the large scale orthoimages with the corrected building occlusion.

• 한국태양에너지학회 논문집
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• 제30권5호
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• pp.85-92
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• 2010

At the beginning the 21st century, we are interested in renewable energy especially photovoltaic. So, we have been installed PV at the building roofs so that we call it building integrated photovoltaic. But strictly speaking, installing the PV on the roof is not building integrated. There are few BIPV designs especially for balcony. In the apartment building, roof is good installing place for PV, but its area was limited. Now a day, built apartment building's heights are more and more increased so that the performance of installed PV on the roof cannot be enough to use even the public use. Thereby, we need the new space in the building to install the PV except the building roof. This study suggests the building facade balcony as a new space to install the PV with building integrated PV design. Hence, in this study, we are designed the movable BIPV shading device for apartment building balcony, and verified its performance with computer simulation. Developed device in this study can works as an electronic generation device and an overhang on the side balcony. As a result, the electronic generation performance of device contributes 15~30% to each apartment unit. The more unit width increase, the better contributed device generates.

• Architectural research
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• 제21권4호
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• pp.91-98
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• 2019

In modern times, numerous cities are competing to create the unique skyline adjacent to the water. Tall buildings located across the river have a great contribution to the skyline of a riverfront city and can be a precious asset for the city. Moreover, in several cities, tall buildings and their impact on the urban skyline are a matter that should be considered and regulated in urban design. Therefore, as a prominent element in a larger visual setting of the city, tall buildings should improve the visual quality of the skyline rather than diminish that quality. This research attempts to provide an objective method to analyze the visual quality of the skyline made by a group of tall buildings through their feature of heights and spatial arrangement from riverfront views. The analysis is determined by the design variables of building heights variation, heights transition, density, and spacing of a group of tall buildings. A comparative case study of tall buildings in Yeouido and Lujiazui was conducted to prove the effectiveness of the analysis. The proposed method can be used in a simple way in the quantitative approach to quantify the visual quality of the skyline. In conclusion, Yeuido's skyline is not quite interesting from the riverfront view in terms of height variation and continuity of the skyline view because they are dispersed. Conversely, Lujiazui's skyline from the riverfront vantage points has a good quality in all aspects of the feature of height and spatial arrangements of tall buildings cluster. These factors can be used for the urban designer on how proposed tall buildings within the cluster should appropriately respond to adding image on the skyline.

• 토지주택연구
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• 제4권3호
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• pp.295-301
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• 2013

본 논문에서는 국내의 초고층 주상복합건축물들에 대하여 층수와 높이 등의 규모 및 구조형식과 횡력저항 시스템의 유형 및 사용 재료의 강도와 층별 콘크리트 강도의 조닝 등에 대하여 조사 분석하여, 이를 토대로 초고층 주상복합 건축물의 구조 계획 유형을 분석하였다. 조사한 결과, 국내 초창기 초고층 주상복합 건축물의 구조시스템은 도곡동 타워팰리스와 같이 철골철근콘크리트구조(SRC)로 건설된 사례가 많았으나, 2005년 이후에는 대부분이 철근콘크리트(RC)구조로 건설되었다. 구조체에서 코어부분을 전단벽으로 배치하여 횡력저항 시스템으로 활용하고 있고, 콘크리트의 강도는 층수에 따라 고층부, 중간부, 저층부로 나누어 강도를 조닝하여 적용하고 있었다. 사례조사를 토대로 국내에 주상복합건축물의 대표적인 유형으로 건설되고 있는 40층 및 60층 규모의 건축물에 대한 구조계획 기초자료를 제시하였다.

• 대한원격탐사학회지
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• 제23권3호
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• pp.211-219
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• 2007

Building extraction is one of the essential issues for 3D city modelling. In recent years, high-resolution satellite imagery has become widely available and it brings new methodology for urban mapping. In this paper, we have developed a semi-automatic algorithm to determine building heights from monoscopic high-resolution satellite data. The algorithm is based on the analysis of the projected shadow and actual shadow of a building. Once two roof comer points are measured manually, the algorithm detects (rectangular) roof boundary automatically. Then it estimates a building height automatically by projecting building shadow onto the image for a given building height, counting overlapping pixels between the projected shadow and actual shadow, and finding the height that maximizes the number of overlapping pixels. Once the height and roof boundary are available, the footprint and a 3D wireframe model of a building can be determined. The proposed algorithm is tested with IKONOS images over Deajeon city and the result is compared with the building height determined by stereo analysis. The accuracy of building height extraction is examined using standard error of estimate.

• Wind and Structures
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• 제4권1호
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• pp.31-44
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• 2001

Mean concentrations of ammonia gas released as a tracer from an isolated low-rise building have been measured and predicted. Predictions were calculated using computational fluid dynamics (CFD) and two dispersion models: a diffusion model and a Lagrangian particle tracking technique. Explicit account was taken of the natural variation of wind direction by a technique based on the weighted summation of individual steady state wind direction results according to the probability density function of the wind direction. The results indicated that at distances >3 building heights downstream the weighted predictions from either model are satisfactory but that in the near wake the diffusion model is less successful. Weighted solutions give significantly improved predictions over unweighted results. Lack of plume spread is identified as the main cause of inaccuracies in predictions and this is linked to inadequate resolution of flow features and mixing in the CFD model. Further work on non-steady state simulation of wake flows for dispersion studies is recommended.

• 한국건축시공학회:학술대회논문집
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• 한국건축시공학회 2023년도 봄 학술논문 발표대회
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• pp.77-78
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• 2023

As large logistics buildings have high floor heights and long spans, these buildings are designed as PC structures, and large cranes are used to lift PC members. PC erection planning can generally cause errors depending on the field engineer's experience. To solve this problem, a basic analysis method is needed to establish a systematic PC member erection plan. Crane work can be minimized if the trajectory is easily and quickly calculated according to the location of the crane and applied to the site. Therefore, the objective of this study is a basic study of crane trajectory distance calculation for sustainable PC members erection of large logistic building. In this study, a crawler crane commonly used for lifting PC members is limited. The trajectory distance for the PC erection plan was automatically calculated using the algorithm.