• Journal of the Korea Institute of Information Security & Cryptology
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• v.7 no.1
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• pp.105-126
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• 1997

충분한 보안 메카니즘과 보안 통신 능력이 없는 지능망에서는 우연이든 고의적이든 민감한 정보에 대한 적법하지 못한 노출이나 변경이 가능성이 더 높게 존재한다. 암호화 및 복호화 알고리즘과 같은 보안 메카니즘이 존재한다는 가정하에서 이 논문은 현재의 지능망에 보안 통신 능력을 추가하기 위한 포괄적인 프레임웍을 제안하다. 이를 위해, 서비스평면(SvP: Service plane), 총괄기능평면(GFP: Global Functional Plane), 분산기능평면(DFP: Distributed Functional Plane) 및 물리평면(Physical Plane)으로 구성되는 현재의 지능망개념모델을 기본으로 의 각 평면에서 추가되어야 할 보안 통신 능력을 제시한다.

• Proceedings of the Korean Society of Coastal and Ocean Engineers Conference
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• 1996.10a
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• pp.115-118
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• 1996

연안역에 있어서 파랑변형의 예측은 구조물의 설계 및 모래이동의 추정 등에 필수적인 사항이다. 실제의 해저는 복합단면이 많으므로 이에 적용이 가능한 모델이 요구되어진다. Bar형 지형에서의 불규칙파의 쇄파에 관해서는 Rayleigh분포를 가정한 고산(1991) 등, Bore모델에 의한 BattjesㆍJanssen(1978), 그리고 안정파개념을 도입한 DallyㆍDean(1986) 등을 들 수 있다. 그러나 어떠한 모델도 물리적 Process의 불명확성 또는 계산의 번잡성 등 난점이 있어, 완성되었다고 할 수 없다. (중략)

• Journal of the Korea Computer Graphics Society
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• v.16 no.3
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• pp.11-19
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• 2010

This paper describes how to define and implement the schema for 3D virtual objects with physical units so that the objects can be compared in virtual environments based on physical properties, such as length, according to the specified units. We define physical units for virtual objects using the International System of Units and based on the X3D (Extensible 3D) specification. The schema must be defined with validation so that it does not violate the original X3D data structure. In this paper, we have extended the original X3D schema with a physical unit specification, and demonstrate the difference between units-specified and non-units-specified 3D scenes using an X3D browser that we developed.

• Journal of The Korean Association For Science Education
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• v.19 no.1
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• pp.8-18
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• 1999

The purpose of this study is to investigate middle school student's conceptual change about Force and Motion by the courseware based on constructivism. It is well known to science educators that misconcrptions about physics concepts are hardly changed into scientific ones. So as to change student's misconceptions about force and motion, the courseware was developed through the analysis of students' conceptions. 20 students were tested before and after learning through the courseware. One of the questions was about the direction of force acting on the ball thrown in the air when it is rising, at the top, and falling. The other was about the magnitudes and directions of forces acting on a car when it is accelerating, in uniform velocity, and decelerating. The results are as follows: In case of vertical motion, all students had misconceptions before learning, but after learning 5 students(25%) have changed their ideas into scientific ones. In case of horizontal motion, 9(45%) out of 20 students who had misconceptions about force and motion have changed their ideas into scientific ones.

• Convergence Security Journal
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• v.15 no.6_2
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• pp.45-53
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• 2015

The security activity suitable for the port can be achieved, provided that the physical security factors specialized for the port security should be presented as preceding conditions. The advanced research about the theoretical data of the port security factors is incomplete and the study on the physical security factors of the port facilities should be done. In this study, the necessity and suitability of port security factors was evaluated with Delphi technique. Consequently, 19 variables of physical security factors were derived in the primary survey and through the second survey of necessity evaluation and the third survey of suitability evaluation 12 variables were selected as the physical security factors of th port facilities.

• Journal of Digital Contents Society
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• v.18 no.3
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• pp.577-584
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• 2017

Despite growing participation of many researchers, the cases of applying the transformative emotional display technology using physical materials and media are still in its early stages and the concept and structure are not properly established in Korea. The emerging global trend of physical display shows a possibility of new digital signage using emotional flip display. In this context, this study attempts to develop related element technology necessary in physical flip display and electromagnetic rotation module along with the integration platform of aesthetic arbitrarily-shaped display. The found results will be applied in researching the contents for the main subject which will be exhibited at the EXPO 2017 in Astana. It is to build up the foundation pioneering the localization of associated industry by means of diverse technological breakthroughs including flip-display technology, electromagnetic module technology, real-time video inter-working technology, high-speed rotation module technology, and transformative 3D frame technology.

• Korean Journal of Construction Engineering and Management
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• v.1 no.1 s.1
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• pp.80-86
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• 2000

The future costs of energy and the cost of the repair of apartment buildings are expected to rise continuously in proportion to the initial costs. Therefore it has become important for these increasing costs to be incorporated and reflected in the design of the building. Systems such as structure and services for the buildings remain constant, but a number of the walls and windows can vary and thus have a major influence on the total construction and running costs of a building. The critical factor in the apartment unit design for the optimization of life cycle cost (LCC) is the ratio of the x and y axis of the walls in the unit plan. This paper demonstrates how to achieve the optimal size and thus optimize the LCC of the building.

• Proceedings of the Korean Radioactive Waste Society Conference
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• 2011.10a
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• pp.75-76
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• 2011

• Journal of the Korean Association of Geographic Information Studies
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• v.5 no.3
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• pp.55-67
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• 2002

Various researches and practices on asset management and asset-based mapping have been done with regard to engineering, industry, business and stocks marketing areas. Their notions and concepts are differently interpreted in response to different requirements. There are considerable research outcomes of management, operation and maintenance for physical, natural and digital assets. However, existing concept of asset management might have limitations to deal with diverse tangible or intangible assets at the individual/household/community level. In this paper, a conceptual framework of Hexad asset model is designed to explicate increase, decrease and other changes of assets flows as a geometric pathway. Particularly, consideration of lands and housing as important physical and natural assets to escape poverty not only leads to creation of an excellent 3D digital asset management, but also reaches to a new approach to asset-based mapping for a poverty information management and system.

• The Journal of the Korea Contents Association
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• v.10 no.11
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• pp.1-9
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• 2010

In comparison with the acquirement of knowledge by expression of symbol or numerical formula, the experience based knowledge acquirement give stable and clear understanding of information to a learner. Various educational systems based on computer such as virtual reality, intelligent learning system, visualization of concept, simulation-based system, and microworld have so far been developed. In this paper, a method of two dimensional visualization of a physical law by simulation has been suggested to educate a learner. Especially, learning the law of gravity by simulation based educational method gives a learner indirect experience that enhance the efficiency of knowledge acquirement clearly. The visualization methods of a real-time physical law and a virtual anomalies' physical law by simulation are proposed in this paper to deliver information or knowledge clearly. Then we show that a learner can acquire some knowledge effectively by the proposed method.