• Journal of Astronomy and Space Sciences
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• 제21권3호
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• pp.209-220
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• 2004

Some methods have been presented to get optimal formation trajectories in the step of configuration or reconfiguration, which subject to constraints of collision avoidance and final configuration. In this study, a method for optimal formation trajectory-planning is introduced in view of fuel/time minimization using parameter optimization technique which has not been applied to optimal trajectory-planning for satellite formation flying. New constraints of nonlinear equality are derived for final configuration and constraints of nonlinear inequality are used for collision avoidance. The final configuration constraints are that three or more satellites should be placed in an equilateral polygon of the circular horizontal plane orbit. Several examples are given to get optimal trajectories based on the parameter optimization problem which subjects to constraints of collision avoidance and final configuration. They show that the introduced method for trajectory-planning is well suited to trajectory design problems of formation flying missions.

• 농촌계획
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• 제14권4호
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• pp.11-19
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• 2008

The layer technique is to produce many memorable scenes by generating layers of new experiences on the existing ones as it is adding the cognitive layers on to the visually seen landscape. Its need is high for places whose landscape itself influences perception, value or expression and which determines the spatial and quality standards. The existing floor plan-based design methods have failed to be useful in generating complex visual experiences. In order to maximize the aesthetical landscape experiences in landscape planning, cognitive layers are needed which complement the input of adequate cognitive elements and the inter-element relationships. Here, layers are utilized to change the arrangement of the landscape elements and coordinate the cognitive flow so that the images could be connected and imagination could occur. A case in point is Anhyun Village in Gochang where physically distinctive layers are additionally set to make a visual experience enriching. The new landscape layers discover the fact that it provides diversity in experiencing the village landscape and forming the sense of beauty and that it is deeply immersed into the daily life of the village. Meanwhile, Guwau Village in Taebaek is an example showing the usefulness of various-layer setting in landscape planning in setting effective circulation planning. That is, the bottom line is the spacing-starting where and making it stay where for a few seconds, and the visual layers. It is also critical to encourage inducing circulation so that layers of the senses stimulating five senses could intervene. Lastly, Mulgeon-ri in Namhae is a case which directly made a parallel of the physical layers of the landscape composition and the cognitive layers of the landscape experience. Artificial landscape planning is mostly about manipulating of visual traits that people feel beautiful, but the layer technique is linked to how to make experiences enriching and renewed.

• 한국산학기술학회논문지
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• 제16권9호
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• pp.6368-6375
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• 2015

본 연구는 스마트 그린시티의 목표를 충족시켜 줄 수 있는 에너지 측면의 계획기법과 적용기술을 정리하고, 국내에서 가장 먼저 스마트 그린시티 계획을 수립한 행복도시를 분석함으로서 스마트 그린시티 계획의 실현방안을 정립하는 데 목적을 두고 있다. 이를 위해 첫째, 선행연구 고찰을 통해 스마트 그린시티의 개념을 정의하고, 3개 목표, 3개 부문, 6개 기본방향을 설정하였다. 둘째, 선행연구 분석과 스마트 그린시티 목표와 계획기법의 기대효과의 연관성을 고려한 전문가 브레인스토밍을 통하여 18개 계획기법을 도출하였다. 셋째, 행복도시를 대상으로 도출된 계획기법의 적용실태를 기반여건 조성과 기술 및 시스템 도입 측면으로 파악하였다. 그 결과, 스마트 그린시티 조성을 위한 주요 계획기법은 '도시 에너지 통합관리 센터 구축', '건축물 에너지 관리 시스템', '빌딩 자동화 시스템', '녹색교통 체계 구축', '지능형 교통 시스템', '친환경 교통수단 보급', 등 건축물 에너지 소비 절감과 지능형 녹색 교통 시스템 구축에 관련된 계획기법으로 도출되었으며 향후 개선 방안을 확인할 수 있었다.

• Journal of Electrical Engineering and information Science
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• 제2권3호
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• pp.51-60
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• 1997

A practically applicable collision free trajectory planning technique for tow robot systems is proposed. The robot trajectories considered in this work are composed of many segments, an at the intersection points between segments robots stop to assemble, weld, ordo other jobs by the attached a end-effectors. The proposed method is based on the Planning-Coordination Decomposition where planning is to find a trajectory of each robot independently according to their tasks and coordination is to find a velocity modification profile to avoid collision with each other. To fully utilize the independently planned trajectories and to ensure no geometrical path deviation after coordination, we develop a simple technique added the minimal delay time to avoid collision just before moving along path segments. We determine the least delay time by the graphical method in the Coordination space where collisions and coordinations are easily visualized. We classify all possible cases into 3 group and derive the optimal solution for each group.

• 제어로봇시스템학회:학술대회논문집
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• 제어로봇시스템학회 1997년도 한국자동제어학술회의논문집; 한국전력공사 서울연수원; 17-18 Oct. 1997
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• pp.1581-1584
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• 1997

This paper poropsed an efficient optimization technuque to resolve redundancy and a trajectory planning for a high precision control using proposed optimization technique. The proposed techniqus is the joint disturbance torque optimizatioin considering redundancy in the joing servo control. Joint disturbance torque is not unknown it is described dynamic equation ignored friction and viscosity. The proposed technique is used the dynamic equatiion included the joint disturbance torque characteristics. Numerical example of 3 joint planar redundant robot manipulator is simulated. In the 2-norm minimization of joint disturbance torque we compared pseudoinverse local optimization with proposed technique, and the results showed better the proposed technique. So the proposed technique can be highly precision controlled redundant robot manipulators in the joint servo control.

• 한국환경과학회지
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• 제9권1호
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• pp.27-33
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• 2000

The purpose of this paper is to present the environment change of Cheju Island as land development process using GSIS(Geo-Spatial Information System) technique. We implemented the process based on the maps of soil color, underground water pollution points, land use, land development planning and land sight seeing supported by Cheju Province Office. To use the maps for GSIS data, first we transformed the picture data of the office into raster structured picture data using scanner. Second, the coordinate system was added to raster data using 1/50000 geographic map. Third, we estimated land planning process using GSIS technique(overlay and reclass technique). The results showed that land development effected the natural environment(forest, green field, farm land). However, the chemical pollution and land sight seeing was not so much effected by the land development that was found.

• Archives of Plastic Surgery
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• 제32권6호
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• pp.796-797
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• 2005

In plastic and reconstructive craniomaxillofacial surgery, careful preoperative planning is essential to get a successful outcome. Many craniomaxillofacial surgeons have used imaging modalities like conventional radiographs, computed tomography(CT) and magnetic resonance imaging(MRI) for supporting the planning process. But, there are a lot of limitations in the comprehension of the surgical anatomy with these modalities. Medical models made with rapid prototyping (RP) technique represent a new approach for preoperative planning and simulation surgery. With rapid prototyping models, surgical procedures can be simulated and performed interactively so that surgeon can get a realistic impression of complex structures before surgical intervention. The great advantage of rapid prototyping technique is the precise reproduction of objects from a 3-dimensional reconstruction image as a physical model. Craniomaxillofacial surgeon can establish treatment strategy through preoperative simulation surgery and predict the postoperative result.

• 제어로봇시스템학회:학술대회논문집
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• 제어로봇시스템학회 1990년도 한국자동제어학술회의논문집(국내학술편); KOEX, Seoul; 26-27 Oct. 1990
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• pp.722-725
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• 1990

This paper proposes a new path planning method for obstacle avoidance of mobile robot. In order to achieve easy planning of the path, a simple representation of the empty space is achieved based on thinning algorithm. The proposed Planning technique facilitates the direct use of information obtained by camera. Comparing to the V-graph method, the task of determining the shortest path from the resulting skeleton of empty space is optimized in terms of number of computation steps. The usefulness of the proposed method is ascertained by simulation.

• Spatial Information Research
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• 제10권1호
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• pp.77-92
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• 2002

도시의 무분별한 개발과 성장으로부터 도시공간의 보전과 이용의 조화를 도모하기 위해서는 합리적이고 투명한 도시계획이 수립되어야 한다. 이러한 사회적 요구를 수용하며 조화로운 공간질서를 확립하기 위해 도시공간내 토지이용에 관한 계획수립체계가 변화되고 보다 강화되었다. 그거나, 강화된 도시계획수립체계가 순기능적으로 작용하기 위해서는 도시공간에 환한 다양한 정보를 신속하게 수집, 정리, 분석하여 도시의 현황과 문제점을 정확하게 판단할 수 있어야 한다. 도시계획 분야에서의 이리한 요구와 수요는 다양한 정보를 신속 정확, 편리하게 수집하여 수집된 정보를 체계적으로 분석, 관리하고 이를 공간상의 분포현황 등 시각적으로 표현할 수 있는 G[S관련 정보기술의 발달로 가능하게 되었다. 본 연구에서는 도시계획법을 근거로 하여 도시계획분야에서의 정보화 요구와 수요를 충족하기 위한 도시계획정보체계의 기본구상을 제시하고, 최근 GIS관련 정보기술동향을 활용한 도시 계획정보체계의 개발모델을 제안하였다.

• 농촌계획
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• 제14권4호
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• pp.97-108
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• 2008

The present study construct a new technique that can evaluate diverse rural policies, which have been applied to the rural development programs at the village level. The method incorporates spatial econometrics models with a decomposition method that has little been utilized before. We applies the technique to evaluate the rural development programs that have been carried out by the Korea Forest Service and. Korea Rural Development Agency. The technique proved to be quite useful in that the technique efficiently separate the direct effect caused by the government policy from the effect explained by the endowment effect such as regional or area characteristics, and residual effect that cannot be identified by the models. The present study concludes with suggesting more quantitative methods need to be developed to evaluate diverse government policy programs, which enables us to discern correct policy effects.