• Proceedings of the IEEK Conference
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• 2002.06d
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• pp.303-306
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• 2002

인공위성영상을 이용하여 벡터 지도 생성은 지형에 따른 건물, 도로, 농지 등에 관한 벡터를 추출하는 작업이 필요하다. 이 작업의 정확도는 지도의 정확도와 상관관계가 있기 때문에 건물 추출의 정확성이 달라진다. 따라서 건물추출의 정확성을 향상시키기 위해 본 연구에서는 위성영상에서 건물 추출 알고리즘을 제안하였다. 이 알고리즘은 인공신경망을 이용하여 건물의 그림자를 추적하고 이를 중심으로 건물위치와 외형을 추정하는 알고리즘을 제안하고 실험하였으며, 양호한 결과를 얻었다.

• Proceedings of the Korean Association of Geographic Inforamtion Studies Conference
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• 2008.06a
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• pp.167-172
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• 2008

본 연구는 다양한 형상과 정보를 가질 뿐만 아니라 신축 및 재건축을 통하여 끊임없이 갱신되는 건물에 대해 3-D GIS를 구축하기 위한 기초자료를 효율적으로 획득하고 관리하기 위한 방법을 제시한다. 먼저 BIM과 GIS의 정보모델의 특징들을 비교해 보고, 가상도시 구축을 위한 CityGML에 대한 개요와 건물의 세밀도(Level of Detail)를 살펴본 다음, BIM으로부터 CityGML에 따른 건물정보를 추출하기 위한 프로토타입을 구현하여 실행사례를 보인다. 본 연구의 접근방법은 건축설계 및 건축관련 엔지니어링 사무소, 또는 건설회사에서 CAD로 작성한 기존의 건물 및 부지에 관련한 2, 3차원 정보뿐만 아니라 새로운 추세로 자리잡는 BIM 정보를 활용할 수 있어 국가GIS 구축을 위해 건물 외형과 내부 모델을 생성하기 위한 많은 노력을 절감할 수 있다는 장점이 있다.

• Proceedings of the Korean Society of Broadcast Engineers Conference
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• 2020.11a
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• pp.328-329
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• 2020

처음 방문하는 도시에서 건물의 외형만을 보고 목적지를 찾는 것은 매우 어려운 일이다. 따라서 본 연구에서는 스마트폰 카메라로부터 촬영된 영상에서 특징점을 추출하고 이를 이미 데이터베이스에 저장된 영상과 매칭하는 작업을 통해 해당 건물의 이름이 무엇인지 알려주는 시스템을 개발하였다. Oriented fast and rotated brief 알고리즘을 이용하여 크기 변화, 회전 등에 강인한 특징점을 추출하였고 알고리즘과 Brute-Force Matcher와 K-Nearest Neighbor 방법을 이용하여 특징점을 매칭하였다. 제안된 시스템은 실제 스마트폰으로 촬영된 영상을 데이터베이스에 연동하여 실험한 결과 90% 이상의 정확도를 보여 주었다.

• Korean Architects
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• no.10 s.270
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• pp.60-65
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• 1991

최근 ACI Joumal에는 12,000 psi(약 840Kg/㎠)의 콘크리트를 현장에서 비벼 넣어 지은 건물이 소개되었다. 그러니까 우리나라에서 고작 210㎏/㎠ 콘크리트로 아파트를 짓는 것은 후진국의 틀에서 벗어나지 못한 증거라면서 고강도 콘크리트의 도입을 부추기게 되었는데 문제는 그 자체가 나쁘게 아니라 이를 기회로 품질관리도 제대로 못하는 주제에 외형만 본받는 아파트 설계를 하게 된 데에 있다는 것이다.

• Journal of Cadastre & Land InformatiX
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• v.46 no.1
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• pp.23-35
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• 2016

Recently, along with the development of IT, the non-linearity and enlargement in the response to the combination of the building industry and IT have made a wide variety in outer shapes of the buildings. So buildings need a more accurate representation using visually superior three-dimensional space information. Therefore, the study models the shapes of the other buildings in accordance with the heights. Frist of all, we measured the buildings using a Terrestrial LiDAR. Second, we obtained a high-density point cloud date of the buildings. Through this data, we made the BIM model and compared the heights of each floor's outer information layers. And then identified the BIM data status using IFC standards formats. From this data, it proposes a new 3D cadastre and the alternative for the establishment of spatial information.

• Spatial Information Research
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• v.16 no.2
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• pp.249-261
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• 2008

This study proposes a method for acquiring and managing basic information on building, which is continuously updated through construction and re-construction, in order to implement 3D-GIS based on geometric shape information and building information. First of all, distinctions between BIM and GIS information models are described, and then an overview of CityGML for virtual city and its Level of Detail are introduced. At last, a prototype for extracting building geometry from BIM data in accordance with CityGML is presented for demonstration. By using IFC data from BIM, this approach enables a lot of firms and contractors in building industry to utilize their 2D/3D, data on sites and buildings, and also to save many effects for generating exterior and interior building models which are inevitable for implementing National GIS.

• Proceeding of KASS Symposium
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• 2008.05a
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• pp.15-18
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• 2008

A Spatial structure, having a curvature with a curved surface, is an extremely efficient mechanical creation considering the external load. It is resisted the out-of-plane direction load by in-plane forces using the structure's curvature. Spatial Structures include many types of structures, such as: space frames or grids; cable-and-strut and tensegrity; air-supported or air-inflated; self-erecting and deployable; cable net; tension membrane; lightweight geodesic domes; folded plates; and thin shells. Membrane structures, a kind of lightweight soft structural system, are used for spatial structures. It is very important that effects by wind load than seismic and dead load. And, wind load is different by surrounding and shape of building In this study, we analyze the results of design wind load and wind tunnel tests about the 2 stadiums which are constructed on sensitive sites by effect of wind loads.

• Culinary science and hospitality research
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• v.17 no.5
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• pp.30-41
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• 2011

This study investigates coffee consumers' perceptions of coffee shops, using the Importance-Performance Analysis and the Fishbein Attitude Model approach. A survey was carried out in coffee shops(2010, 12/6~12/20), and 175 out of 200 copies of questionnaire were returned from the coffee shops. After excluding 27 unusable cases which had an unacceptable level of missing data, 148 cases were used for analysis. The IPA showed that an attractive facade, toilet cleanliness, coffee freshness, coffee taste were included in the area of maintaining good results while coffee price was in the area of concentrating efforts, which coffee shop managers should improve. Also, the analysis using the Fishbein attitude model showed that coffee taste, an attractive facade, toilet cleanliness, and coffee freshness were in order of importance, and Starbucks, Angelinus, Caffebene, and Pascucci are in order of brand preference. Although this study has some limitations(such as self-report, common method bias), it shows significant implications to coffee shop managers.

• Journal of Bio-Environment Control
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• v.3 no.2
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• pp.145-150
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• 1994

This study was carried out with different nitrogen fertilization levels for the purpose of basic information of culture of chicory (Cichorium intybus L. var. foliosum) in Korea. Treatment level of nitrogen fertilization was separated as 0, 10, 20, and 30kgN/10a. Though the apparent growth of chicory was increased as the increasing level of nitrogen fertilization, the deterous effects such as tipburn and bolting were increased. The treatment of 15-25kgN/10a was suitable for the production of chicory having high quality and commercial value.

• Journal of the Korean Association of Geographic Information Studies
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• v.17 no.3
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• pp.93-103
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• 2014

Regarding to the cadastral information and building information as a spatial information, studies on linking between cadastral records and building information, or integration methodology on 2D based building map and land information were proposed. Cadastral information has grown its values by cadastral resurvey project and cadastral confirmation survey. There is a tendency of BIM in the design stage which is not just simple 3D dataset and BIM is spreading in public and private sectors. However, studies on the linkage between building information and cadastral information is relatively weak comparing to the BIM spreading. One of the main features that have been improved in IFC4 is the interoperability with GIS. In this regards, the researcher propose several revision methods to link cadastral information to building information. Cadastral information needs to improve the quality of the dataset's such as unifying the different coordinate systems and preparing continuous cadastral map. For buildings, standardization of BIM in the public and private sectors is urgent task. IFC4 and upcoming IFC5 are international standards which need to be considered and BIM reverse engineering for the existing buildings is necessary for the public utilization in the near future.