• Journal of the Korean Society for Aeronautical & Space Sciences
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• v.43 no.8
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• pp.692-698
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• 2015

This paper represents a trajectory design and analysis technique which uses invariant manifolds of the circular restricted three body problem. Instead of the classical patched conic method based on 2-body problem, the equation of motion and dynamical behavior of spacecraft in the circular restricted 3-body problem are introduced, and the characteristics of Lyapunov orbits near libration points and their invariant manifolds are covered in this paper. The trajectories from/to Lyapunov orbits are numerically generated with invariant manifolds in the Earth-moon system. The trajectories in the Sun-Jupiter system are also analyzed with various initial conditions in the boundary surface. These methods can be effectively applied to interplanetary trajectory designs.

• Journal of the Korean Institute of Traditional Landscape Architecture
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• v.30 no.4
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• pp.56-69
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• 2012

In this paper, we investigate the original space, the restoration and the construction methods of royal tombs of the Joseon dynasty Sejong who is one of the most respected kings by our people through old document. Yeongneung(英陵) where King Sejong and Queen Soheon is buried has a unique construction method and history of move which is as equally important as human history. It is estimated that there were documents which contains important materials of construction method in the time when the tomb is moved in 1468. Destroyed during Japanese Invasion of Korea in 1592 most of the records of Yeongneung's construction can be found almost no. Fortunately existing literature "朝鮮王朝實錄", "英陵補土所謄錄" written in 1786, "春官通考" written in 1788 and "英陵寧陵補土所謄錄" written in 1900 are used in this paper. As a result of examining these old documents, 1) Definition of tomb construction, 2) Space and layout of tomb, 3) Characteristics of tomb facilities, 4) Scale and contents of tomb construction, 5) Plants of tombs are included in this paper. World Heritage listed cultural facilities should be well preserved and careful consideration is required to use original construction methods during restoration. Accordingly this study conducted by examining old literature. Through this study including Yeongneung's construction characteristics, understanding of Yeongneung construction and restoration in the future is considered.

• Journal of the Institute of Electronics Engineers of Korea SC
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• v.48 no.5
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• pp.13-24
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• 2011

This paper deals with a 3D-pose (orientation and position) estimation problem of a circular object in 3D-space. Circular features can be found with many objects in real world, and provide crucial cues in vision-based object recognition and location. In general, as a circular feature in 3D space is perspectively projected when imaged by a camera, it is difficult to recover fully three-dimensional orientation and position parameters from the projected curve information. This paper therefore proposes a 3D pose estimation method of a circular feature using a coplanar point. We first interpret a circular feature with a coplanar point in both the projective space and 3D space. A procedure for estimating 3D orientation/position parameters is then described. The proposed method is verified by a numerical example, and evaluated by a series of experiments for analyzing accuracy and sensitivity.

• Proceedings of the KAIS Fall Conference
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• 2009.12a
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• pp.66-69
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• 2009

본 논문에서는 도시화, 국토개발 등을 통해 빠르게 달라지고 있는 거주 공간 및 자연환경의 원형을 사이버공간에 친환경적으로 표현하여 3D기반의 환경교육용 소프트웨어를 개발하기 위한 콘텐츠로 조선시대 마을의 거주 공간 및 자연환경의 원형기법을 이용한 3D기술(가상현실, 3D Max)을 이용하여 사이버공간에 재현하는 사이버 체험학습 프로그램을 설계 및 구현하였다.

• Proceedings of the KAIS Fall Conference
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• 2011.05a
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• pp.211-213
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• 2011

본 연구에서는 도시화, 국토개발 등을 통해 빠르게 달라지고 있는 거주공간 및 자연환경의 원형을 사이버공간에 친환경적으로 표현하여 환경교육 학습자료로 활용하기 위한 컨텐츠로 조선시대 마을의 거주공간 및 자연환경의 원형을 3D기술(가상현실, 3D Max)을 이용하여 사이버공간에 재현하는 환경 교육용 가상체험 프로그램을 개발하고자 한다.

• Proceedings of the KAIS Fall Conference
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• 2010.05a
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• pp.515-518
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• 2010

본 논문에서는 도시화, 국토개발 등을 통해 빠르게 달라지고 있는 거주 공간 및 자연환경의 원형을 사이버공간에 친환경적으로 표현하여 3D기반의 환경교육용 소프트웨어를 개발하기 위한 콘텐츠로 조선시대 마을의 거주 공간 및 자연환경의 원형기법을 이용한 3D기술(가상현실, 3D Max)을 이용하여 사이버공간에 재현하는 사이버 체험학습 프로그램을 설계 및 구현하였다.

• Journal of the Korean Institute of Traditional Landscape Architecture
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• v.38 no.1
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• pp.103-114
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• 2020

This study was conducted on Yuanming New Garden in China, which re-lighted the previously lost or damaged original space through representation from the perspective of creating traditional landscape. We looked at the composition of this place, the comparison of relevant literature and actual representation, and the characteristics of representation techniques. The results are as follows. First, TYuanming New Garden is a representation space with the motif of Yunamingyuan in Beijing. An advisory group of some 400 related experts discussed the prototype. The historicity of the real space was considered in the representation process. Second, New Yuanmingyuan garden was recreated based on the 'The Forty Scenic Views of Yuanmingyuan', and 31 of the scenic spots were created. The buildings in each precinct had a 1:1 scale response with structures that were previously constructed in Yuanmingyuan, Beijing. New Yuanmingyuan garden's way in which the main landscape is laid out around the Fuhai Lake(福海), which the landscape is drawn appeared was the same as Yuanmingyuan in Beijing. However, some of the facilities were reproduced on the basis of the 'The Forty Scenic Views of Yuanmingyuan', so they turned out to be different from what Yuanminyuan in Beijing looks like today. New Changchunyuan garden was represented around water landscape of the Western Mansins(Xiyang Lou, 西洋樓) area and the Haeakgaegum(海岳開襟), and the buildings and the facilities were reconstructed based on the 'Copper Print of Western Mansins'. Third, Yuanming New Garden made a prototype of the 'The Forty Scenic Views of Yuanmingyuan' and 'Copper Print of Western Mansins' during the process of synchronic changes in the garden. In addition, the original space and the ambiguous original space or exhibition space were clearly identified through the plant. On the other hand, due to the reenactment of buildings, the spatial composition and placeability of the original spaces of Yuanmingyuan garden and Changchunyuan garden in Beijing were not inherited, and the introduction of elements that did not match traditional landscaping spaces, and the introduction of garden elements that were not prototype and other variations for the use of tourism were found to be drawback.

• Proceedings of the KAIS Fall Conference
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• 2010.11a
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• pp.203-205
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• 2010

본 논문에서는 도시화, 국토개발 등을 통해 빠르게 달라지고 있는 거주 공간 및 자연환경의 원형을 사이버공간에 재현하여 환경교육 학습자료로 활용하기 위한 소프트웨어로 조선시대 마을의 거주 공간 및 자연환경의 원형, 에너지, 생활환경, 수질, 대기, 토양, 지구분야를 3D 기술을 이용한 환경교육용 가상체험 소프트웨어를 구현하는 것을 최종목표로 한다.

• Proceedings of the KAIS Fall Conference
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• 2011.05a
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• pp.226-228
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• 2011

본 논문에서는 산업혁명 이후 근 현대 도시화와 국토개발 등을 통해 빠르게 변화하고 있는 거주 공간 및 자연환경의 원형을 사이버공간에 재현하여 환경교육 학습 자료로 활용하기 위한 콘텐츠로 조선시대 마을의 거주 공간 및 자연환경의 원형, 생활환경, 지구분야를 QUEST 3D 기술을 이용하여 환경호르몬에 대한 환경교육용 콘텐츠 개발하고 실험 평가 및 분석을 하였다.

• Proceedings of the KAIS Fall Conference
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• 2010.05a
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• pp.6-8
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• 2010

본 논문에서는 도시화, 국토개발 등을 통해 빠르게 달라지고 있는 거주 공간 및 자연환경의 원형을 사이버공간에 친환경적으로 표현하여 환경교육 학습 자료로 활용하기 위한 콘텐츠로 조선시대 마을의 거주 공간 및 자연환경의 원형, 에너지, 생활환경, 수질, 대기, 토양, 지구 분야를 가상현실을 이용한 자연환경 콘텐츠를 구현하였다.