• Proceedings of the Korean Society of Applied Entomolohy Conference
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• 2000.05a
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• pp.97-97
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• 2000

• Korean journal of applied entomology
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• v.35 no.1
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• pp.7-14
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• 1996

A morphometric analysis is used to clarify the interspecific relationship between 4 species of the subgenus Parapagaronia in Pagaronia. The quantitative distinctions are confirmed at 87.5% of correct assignment in male and 96.25% in female.

• Journal of the Korean Geotechnical Society
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• v.15 no.6
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• pp.3-16
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• 1999

This paper presents the results of sensitivity analysis based on an example study to verify a newly developed reliability-based model for rock slopes considering uncertainties of discontinuities and failure modes-plane, wedge, and toppling. The parameters that are needed for sensitivity analysis are the variability of discontinuity properties (orientation and strength of discontinuities), the loading conditions, and the rock slope geometry. The variability in orientation and friction angle of discontinuities, which can not be considered in the deterministic analysis, has a great influence on the rock slope stability, The stability of rock slopes including failure modes is more influenced by the selection of dip direction of cutting rock face than any other design variables, The example study shows that the developed reliability-based analysis model can reasonably assess the stability of rock slope.

• Journal of the Korea Institute of Information and Communication Engineering
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• v.19 no.9
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• pp.2129-2137
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• 2015

Lots of research and development works have been actively focused on the self-driving vehicles, locally and globally. In order to implement the self-driving vehicles, lots of fundamental core technologies need to be successfully developed and, specially, it is noted that traffic lights detection and recognition system is an essential part of the computer vision technologies in the self-driving vehicles. Up to nowadays, most conventional algorithm for detecting and recognizing traffic lights are mainly based on the color signal analysis, but these approaches have limits on the performance improvements that can be achieved due to the color signal noises and environmental situations. In order to overcome the performance limits, this paper introduces the morphological analysis for the traffic lights recognition. That is, by considering the color component analysis and the shape analysis such as rectangles and circles simultaneously, the efficiency of the traffic lights recognitions can be greatly increased. Through several simulations, it is shown that the proposed method can highly improve the recognition rate as well as the mis-recognition rate.

• Proceeding of KASS Symposium
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• 2008.05a
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• pp.119-124
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• 2008

Space structure is a appropriate shape that resists external force only with in-plane force by reducing the influence of bending moment, and it maximizes the effectiveness of structure system. The space structure should be analized by nonlinear analysis regardless static and dynamic analysis because it accompanies large deflection for member. To analyze the structure of the space structure exactly generally geometrically nonlinear and material nonlinear, complex nonlinear analysis are considered. To settle the weakness that geometric nonlinear problem does not consider nonlinear as per trait and position of the structure material and that the nonlinear matter of structure material also does not consider nonlinear as per geometric form. Therefore, In this paper, analysis is considered geometric nonlinear and material nonlinear simultaneous conditioning, and traced load-deflection curve by using ABAQUS which is the general purpose of the finite element program.

• Journal of Korean Association for Spatial Structures
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• v.8 no.1
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• pp.41-48
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• 2008

Spatial structure is an appropriate shape that resists external force only with in-plane forte by reducing the influence of bending moment, and it maximizes the effectiveness of structure system. the spatial structure should be analyzed by nonlinear analysis regardless static and dynamic analysis because it accompanys large deflection for member. To analyze the spatial structure geometrical and material nonlinearity should be considered in the analysis. In this paper, a geometrically nonlinear finite element model for plane truss structures is developed, and material nonlinearity is also included in the analysis. Arc-length method is used to solve the nonlinear finite element model. It is found that the present analysis predicts accurate nonlinear behavior of plane truss.

• The Journal of the Korea Contents Association
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• v.6 no.12
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• pp.147-154
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• 2006

The final purpose of this study is to explore morphological change of Shenyang in the period of the rising Chung Dynasty. For that purpose we have tried to build the historical GIS DB of site and analysis of the structure and shape pattern of the city by using the functions of GIS. From the view of spatial structure and cultural context, main characteristics, which is derived from the analysis of ancient map of Shenyang, can be summarized into five things as follows ; transformation of open spatial structure into closed structure, combination of horizontal spatial structure with vertical structure, transformation of practical spatial structure into symbolic structure, transformation of natural spatial structure into institutional form of ancient Chinese capital city, conservation of traditional Manchurian culture.

• Journal of the korean veterinary medical association
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• v.38 no.6
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• pp.514-523
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• 2002

우선, 방사선의 생물학적 영향에 대하여 이해를 하기 위해서는 방사선 생물학, 방사선 유전학, 방사선 물리학 그리고 방사선 화학 등에 대한 최소한의 지식의 뒷받침이 있어야 하지만 용어의 전문성이 높아서 용어적 해석만을 위해서도 많은 시간이 소요될 것으로 생각이 된다. 특히, 방사선의 생물에 대한 영향을 평가하기 위해서는 세포유전학적 지식을 바탕으로 하는 방사선의 급$\cdot$만성 방사선 효과에 대한 설명이 필요할 수 밖에 없기 때문에 앞에서 열거한 분야들이 상호 보완되어야 한다고 생각이 된다. 본 투고에는 우선적으로 방사선 환경에 대하여 열거하면서 방사선 노출 형태들과 생물학적 영향에 대하여 최소한의 설명을 중심으로 기술하고자 한다.

• The Journal of Korean Association of Computer Education
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• v.9 no.1
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• pp.89-95
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• 2006

The local geometric properties such as curvatures and normal vectors play important roles for analyzing the local shape of objects in the fields of computer graphics and computer vision. The result of the geometric operations such as mesh simplification and mesh smoothing is dependent on how to compute the curvatures of meshes because there is no exact mathematical definition of curvature at vertices on 3D meshes. Therefore, In this paper, we indicate the fatal error in computing the sectional curvatures of the most previous discrete curvature estimations. Moreover, we present a discrete curvature estimation to overcome the error, which is based on the parabola interpolation and the geometric properties of Bezier curves. Therefore, We can well distinguish between the sharp vertices and the flat ones, so our method may be applied to a variety of geometric operations.

• Journal of the Korean Society of Hazard Mitigation
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• v.10 no.6
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• pp.1-7
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• 2010

University dormitory has some weaknesses against disaster such as fire because of high population density and strict control of access in night time. The purpose of this study is suggestion of a guide of effective floor plan for improvement of evacuation safety. Plans for preventing disasters are studied and evacuation safeties are analysed using network model analysis method according to plan types. The weakness of disaster prevention is quantified, and effectiveness of bidirectional evacuation is confirmed. The circuit type floor plan shows best evacuation characteristics and this result is anticipated to be adopted to design process of new dormitories and will contribute to improvement of evacuation safety.