• Journal of Korean Association for Spatial Structures
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• v.8 no.4
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• pp.57-64
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• 2008

In scissors deployable structure which could be easily removed by folding it, a method of curvature variation in the profile and the structural characteristics were examined. At first, the relation between the profile curvature and a eccentricity of joint in scissors members is presented by a formula and a graph. And then, the structural characters of scissors members with the curvature variation are presented by analysing a several models based on this relation. Also, a real modeling study is achieved in accordance with this composition method and the possibilities to be developed with the expected profile shape was examined.

• Communications of Mathematical Education
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• v.18 no.2 s.19
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• pp.133-142
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• 2004

선형대수 교육과정 연구 단체(LACSG, The Linear Algebra Curriculum Study Group)는 1990년 그의 결성과 함께 선형대수 교육과정에서 중점적으로 고려해야할 다섯 가지 추천 목록을 발표하였다. 그 중 가장 두드러진 특징은 기존의 형식적이고 엄밀한 벡터공간 중심의 선형대수 교육과정을 보다 실용적인 행렬중심으로 바꿀 것을 주장하고 있다. 본 연구에서는 벡터 공간 중심의 교육과정과 행렬 중심에 기반한 교육과정의 역사적 흐름에서 행렬 중심의 교육과정이 우위를 차지하게 된 배경을 살핀다. 또한 이러한 교육과정과 맥을 같이한 선형대수 교과서의 변천과, 행렬의 곱의 전개를 중심으로 두 중심사이의 차이를 논한다.

• Journal of Korean Library and Information Science Society
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• v.33 no.3
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• pp.153-172
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• 2002

The purpose of this study is to give careful consideration to some issues revealed in process of construction of ’Digital Material Center' in public library and to draw up the plan for development of digital contents in comparison with Internet contents. This article makes some proposal to strengthen the competitiveness of 'Digital Material Center' on Internet society.

• Journal of the Korean Geographical Society
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• v.51 no.4
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• pp.541-558
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• 2016

Landfill has been a long pending issue in the Seoul Metropolitan Region since it was created. Adopting Painter's notion of "territory-effect," this paper analyzes the network formation and change of diverse actors and territory as an effect of networked relations according to four periods from the creation of the landfill to current extension of landfill use. The results are as followed. First, the network formation and composition of major actors has been changed together with historical-geographical conditions. Second, these networks created territory as an effect and re-articulated the configuration of conflicts and solidarity of diverse actors. Third, territory created as an network-effect are different in each period, and is continuously reterritorializing. These findings suggest that territory is never complete and always in the making.

• Journal of the Korean Institute of Telematics and Electronics S
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• v.36S no.7
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• pp.50-61
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• 1999

\In this paper, we consider the optimal scheduling of detection and tracking parameters in phased array radars to minimize the radar energy required for track maintenance in a cluttered environment. We develop a mathematical model of target detection induced by a search process in phased array radars. In the mathematical development, we take into account the effect of unwanted measurements that may have originated from clutter or false alarms in the detection process. We use and analytic approximation of the modified Riccati equation of the probabilistic data association (PDA) filter to take into account the effect of clutter interference in tracking. Based on the search process and the tracking models, we formulate the optimal scheduling problem into a nonlinear optimal control problem. We solve a constrained nonlinear optimization problem to obtain the solution of the optimal control problem.

• Proceedings of the Korean Institute of Landscape Architecture Conference
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• 2017.10a
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• pp.54-56
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• 2017

• The Science & Technology
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• s.527
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• pp.26-29
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• 2013

• The Mathematical Education
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• v.32 no.1
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• pp.55-68
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• 1993

• Journal of Information Management
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• v.12 no.5
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• pp.130-134
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• 1979

• Proceedings of the Korean Institute of Landscape Architecture Conference
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• 2023.10a
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• pp.30-32
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• 2023