• 제어로봇시스템학회:학술대회논문집
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• 제어로봇시스템학회 1991년도 한국자동제어학술회의논문집(국내학술편); KOEX, Seoul; 22-24 Oct. 1991
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• pp.1169-1174
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• 1991

In conventional geographic mapping system, it is needed to input many already existing geographic map into computer system for secure and efficient maintence. Because of large map data, it is required to construct layers from map image for easy display, fast retreval and efficient storage. Thus this paper represents a method of the extracting features from contour map and constructing three layers. The layers are symbol, building, contour line. Experimental results are presented confirming the method's high extraction.

• 한국측량학회지
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• 제23권3호
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• pp.313-322
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• 2005

급속한 기술의 발전과 인간 생활 및 문화 활동의 범위가 변하고 확장됨에 따라 지표면에 빠른 변화가 발생하고 있으므로 지도와 지형공간 데이터베이스의 갱신주기는 짧아져야 한다. 이를 만족시키기 위하여 최근에 지형공간정보 분야에서는 지도제작 과정의 자동화와 데이터 처리속도의 단축을 위한 연구가 진행되고 있으며, 이 결과 수치사진측량 워크스테이션, GPS/INS 기술, 위성영상의 활용기술, 자동 정보추출 및 LiDAR 시스템이 개발되었다. 항공 LiDAR 데이터로부터 자동으로 건물을 추출하고 등고선을 생성할 수 있는 가능성에 많은 관심이 집중되고 있다. 그러나 숙련된 작업자에 의해 수동으로 건물을 도화하는 기존의 사진측량 방법에 의한 결과와 비교하면, 정확도와 효율성에 대한 좀더 심도 깊은 연구가 수행되어야 한다. 반면에, LiDAR 데이터로부터 등고선을 생성한 결과, 품질 및 정회성에 있어서 효율적이고 경제적이었다. 본 연구에서는 수치지도 제작에 필요한 건물을 추출하고 등고선을 생성하기 위하여 LiDAR 데이터의 전처리 과정과 단계별 처리과정에 관련되는 다양한 조건의 영향 및 정확도에 관하여 평가하였다.

• Earthquakes and Structures
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• 제13권2호
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• pp.103-118
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• 2017

In vertical seismic isolation (VSI), a building is partitioned intentionally by vertical layers into two dynamically different substructures for seismic response reduction. Initially, a 1-story frame was partitioned into two substructures, interconnected by viscous and visco-elastic links, and seismic responses of the original and the vertically isolated structures (VIS) were obtained, considering a large number of stiffness and mass ratios of substructures with respect to the original structure. Color contour graphs were defined for presentation and investigation of large amounts of output results. Dynamic characteristics of the isolated structures were studied by considering the non-classical damping of the system, and then the effects of viscous and visco-elastic link parameters on the modal damping ratios were discussed. On this basis, three states of mass isolation, interactional state, and control mass were differentiated. Response history analyses were performed by Runge-Kutta numerical method. In these analyses, interaction of isolation ratios and link parameters, on response control of VIS was studied and the appropriate ranges for link parameters as well as the optimal ranges for isolation ratios were suggested. Results show that by using the VSI technique, seismic response reduction up to 50% in flexible substructure and even more in stiff substructure is achievable.

• 한국가구학회지
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• 제19권5호
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• pp.319-327
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• 2008

As art of lamination by plywood got to be generally used, it became a suitable material for expressing live curves that were not able to be expressed on wood furniture made of plank and timber, as well as, openwork deep in curved space, heavy quality of material, and changing contour line-looking wave lines with different process angles. As an alternative, it would be good to build a full scale model, since it would provide practice in form-building and it would also provide a chance to correct the form. Less material can be used and reduce the cutting process by Properly trimming models made of soft formal structure such as Styrofoam Iso-pink and adhesive Styrofoam, and separating the layers and using them on shape cutting of plywood with the same thickness. And by attaching the model veneer that was used in shape cutting of the model and using it as a cutting guide, we can reduce the error of work and successively build the planned form. Since this study is about the need of a full scale model for a laminated wood model and an efficient process, this study concentrates more on process.