• 한국건설관리학회:학술대회논문집
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• 한국건설관리학회 2008년도 정기학술발표대회 논문집
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• pp.828-832
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• 2008

2004년 미국의 부시대통령이 달기지 건설계획을 발표한 이후 세계 각국은 달(Moon)등 우주공간에서의 건설을 위한 다양한 연구를 하고 있다. 미국은 부시대통령의 우주개발 계획에 따라 2025년경 달 전초기지(Lunar Outpost)건설을 목표로 하는 실천 로드맵을 세워 현재 추진 중에 있다. 이러한 우주개발의 목적은 우주과학 및 첨단산업의 발전과 달에 매장되어 있는 자원의 확보를 위한 것으로 달에는 수많은 종류의 광물자원과 약 500만 톤 이상의 헬륨3가 매장되어 있는 것으로 추정된다. 이에 따라 미국 외에도 일본, 유럽, 중국 등 우주개발 선진국들은 우주자원의 확보를 위하여 인간의 장기거주 및 자원확보기지의 개발을 위한 연구를 수행하고 있다. 이에 따라 본 논문에서는 외국의 우주개발과 관련한 건설동향을 알아보고 본 논문에서는 우주건설의 정의 및 필요성을 제시하고 외국의 우주개발 계획 및 연구동향을 살펴봄으로써 향후 우주건설의 방향을 제시한다.

• 천문학논총
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• 제30권2호
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• pp.621-624
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• 2015

We present the current status (as of August 2014) of SPICA (Space Infrared Telescope for Cosmology and Astrophysics), which is a mission optimized for mid- and far-infrared astronomy with a cryogenically cooled 3m-class telescope. SPICA is expected to achieve high spatial resolution and unprecedented sensitivity in the mid- and far-infrared, which will enable us to address a number of key problems in present-day astronomy, ranging from the star-formation history of the universe to the formation of planets. We have carried out the "Risk Mitigation Phase" activity, in which key technologies essential to the realization of the mission have been extensively developed. Consequently, technical risks for the success of the mission have been significantly mitigated. Along with these technical activities, the international collaboration framework of SPICA has been revisited, which resulted in la arger contribution from ESA than that in the original plan. To enable the ESA participation under the new framework, a SPICA proposal to ESA is under consideration as a medium-class mission under the framework of the ESA Cosmic Vision. The target launch year of SPICA under the new framework is the mid-2020s.

• Architectural research
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• 제13권3호
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• pp.19-29
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• 2011

Visibility of a space have been defined in several different ways: such as the axial line covering a convex space, a convex space defining the fattest shape in a space and an Isovist field formed by a field of vision at a given vantage point. Isovist fields are referred to as a descriptive medium to describe a movement by reviewing and analyzing geometric properties in them. Many descriptive methods for analysis of three-dimensional isovist are applied to analyzing the morphological properties in a 3D space more realistically. Although these models are regarded as a more advanced method for describing spatial properties, they have pros and cons such as complex mathematical calculations and somewhat arbitrary calibration in addition to huge consumption of memory space. These difficulties lead to the development of a three-dimensional visual accessibility model that explores the implication of building shape on the calculation of isovist fields drawn on a 2D plane. We propose a conceptual framework of how to measure the isovist field not as a 3D volume but as a combination of 2D plane on the ground with the 3D building shape of it's facade.

• 한국실내디자인학회논문집
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• 제17권1호
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• pp.60-68
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• 2008

The aim of this study is to elucidate the meaning of "less is more" by examining the design process of the Farnsworth House and its spatial composition. In order to find out what constitutes "less" and "more", Mies' sketches and drawings were reviewed, and the vision of the architect and the owner, and the responses from the critics were studied. As a matter of fact, these seemingly contradictory concepts the "less" and the "more" are relative terms that complement each other. The concept of "less" describes an enclosure of space, fixed, inflexible and invariable space that leaves no room for change. On the other hand, the term "more" represents an openness of space, free, flexible, and variable space. Mies tried to minimize "less" element when designing the interior of the Farnsworth House, and he did so by eliminating columns and walls. On the contrary, by using only fixed core, he created a "more" space, where the effects of flexible and open qualities are maximized. However, duality and contradiction rising from glass external wall and portico in the Farnsworth House raise a critical issue in this "less is more" discourse. The role of these parts of the house is rather contradictory, and the glass wall and the portico hold both "less" and "more" elements. Unlike its relatively simple composition of space, the Farnsworth House encompasses many complex and contradictory ideas that leave room for wide scope of exploration and various interpretations.

• Journal of Astronomy and Space Sciences
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• 제29권4호
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• pp.381-387
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• 2012

The planetary exploration rover executes various missions after moving to the target point in an unknown environment in the shortest distance. Such missions include the researches for geological and climatic conditions as well as the existence of water or living creatures. If there is any obstacle on the way, it is detected by such sensors as ultrasonic sensor, infrared light sensor, stereo vision, and laser ranger finder. After the obtained data is transferred to the main controller of the rover, decisions can be made to either overcome or avoid the obstacle on the way based on the operating algorithm of the rover. All the planetary exploration rovers which have been developed until now receive the information of the height or width of the obstacle from such sensors before analyzing it in order to find out whether it is possible to overcome the obstacle or not. If it is decided to be better to overcome the obstacle in terms of the operating safety and the electric consumption of the rover, it is generally made to overcome it. Therefore, for the purpose of carrying out the planetary exploration task, it is necessary to design the proper suspension system of the rover which enables it to safely overcome any obstacle on the way on the surface in any unknown environment. This study focuses on the design of the new double 4-bar linkage type of suspension system applied to the Korea Aerospace Research Institute rover (a tentatively name) that is currently in the process of development by our institute in order to develop the planetary exploration rover which absolutely requires the capacity of overcoming any obstacle. Throughout this study, the negative moment which harms the capacity of the rover for overcoming an obstacle was induced through the dynamical modeling process for the rocker-bogie applied to the Mars exploration rover of the US and the improved version of rocker-bogie as well as the suggested double 4-bar linkage type of suspension system. Also, based on the height of the obstacle, a simulation was carried out for the negative moment of the suspension system before the excellence of the suspension system suggested through the comparison of responding characteristics was proved.

• 천문학회지
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• 제56권2호
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• pp.263-275
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• 2023

The Sun-Earth Lagrange point L4 is considered as one of the unique places where the solar activity and heliospheric environment can be observed in a continuous and comprehensive manner. The L4 mission affords a clear and wide-angle view of the Sun-Earth line for the study of the Sun-Earth and Sun-Moon connections from he perspective of remote-sensing observations. In-situ measurements of the solar radiation, solar wind, and heliospheric magnetic field are critical components necessary for monitoring and forecasting the radiation environment as it relates to the issue of safe human exploration of the Moon and Mars. A dust detector on the ram side of the spacecraft allows for an unprecedented detection of local dust and its interactions with the heliosphere. The purpose of the present paper is to emphasize the importance of L4 observations as well as to outline a strategy for the planned L4 mission with remote and in-situ payloads onboard a Korean spacecraft. It is expected that the Korean L4 mission can significantly contribute to improving the space weather forecasting capability by enhancing the understanding of heliosphere through comprehensive and coordinated observations of the heliosphere at multi-points with other existing or planned L1 and L5 missions.

• 한국조경학회지
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• 제33권5호통권112호
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• pp.1-14
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• 2005

This study describes the recognition and the application of materials corresponding to the formative language of landscape design as the formative process of creating connote forms and meanings in a space. The purpose of this study is to propose the significance of materiality not only for conveying the meaning of landscape but also for providing expanded experience through synesthetic perception. The study consists of two parts: (1) The concept of materiality in landscape architecture is studied in three categories, which are divided in chronological order when the recognition of materials was changed. (2) Based on this exploration of the concept of materiality and the ways of expressing it that have developed from landscape arts to landscape architecture, the significance of materiality as the medium of contemporary landscape design is proposed. Breaking from previous technical and engineering approaches to materials and from a vision-centered recognition of materials, this study focuses on aesthetic and semantic aspects of materiality and is based on multidimensional recognition though synesthesia. Materiality has significance not only as the dynamic medium that carries the meaning of landscape by providing connections with the surrounding environmental context, but also as the engagement medium that expands observers' experiences with the environment through synesthesia. The study of materiality as the medium of landscape design would contribute to expanding the scope of the language of landscape design and to expressing the meaning of landscape through materiality being revealed on the basis of converted recognition of materials.

• 영재교육연구
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• 제11권3호
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• pp.45-68
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• 2001

영재들의 잠재 능력을 최대한으로 발현시키기 위해서는 영재들의 일반적인 인지적.정의적 특성 및 다양한 학습 요구를 반영할 수 있는 최적의 학습 환경, 즉 구성주의 학습 환경을 제공해줄 필요가 있다. 이를 위해 본 연구에서는 구성주의 원리에 바탕을 둔 협동학습 방안을 탐색하기 위해 ‘웹 기반 구조적 의사교류법 (Web-Based Structural Communication)’을 활용하여 고등학교 수학 영재들의 ‘2$\times$2행렬’학습 프로그램을 개발하고자 하였다. 최근 급속도로 발전하고 있는 컴퓨터 공학과 네트워크 및 인터넷의 보급으로 ‘구조적 의사교류법’의 활용 가능성 및 효율성이 그 어느 때 보다도 크게 기대된다. 특히 웹을 통한 상조적 협동학습은 학습자들로 하여금 지식 구성의 과정을 경험하게 하여, 결과적으로 객관적이고 다양한 관점을 지니게 되는 학습 활동을 구현할 수 있는 대표적인 학습도구로 활용될 수 있을 것이다. 그러나 본 연구에서는 ‘웹 기반 구조적 의사교류법’의 적용 가능성을 탐색하고자 프로그램을 개발하는데 목적이 있기에, 이 프로그램의 구체적 효과에 관해서는 앞으로 계속적인 연구가 필요하리라 여겨진다.

• 문화기술의 융합
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• 제9권1호
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• pp.697-702
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• 2023

최근 4차 산업혁명의 핵심기술인 드론의 도입으로 학교 교육 현장에서는 드론을 활용한 다양한 융합교육이 진행되고 있다. 특히 자유학기제 수업 및 진로탐색과 연계하여 드론 이론 및 실습 교육을 진행하고 있다. 드론융합 교육프로그램은 단순 시연 실습교육 보다 학습자의 만족도가 높고 직접적인 실습 경험으로 인하여 학습효과가 높게 나타나고 있다. 그러나 다수의 학습자를 상대로 실습교육을 진행하고 있어 한정된 장소에서의 다중드론 비행에 제약 및 학습자 통제가 불가능한 실정이다. 본 논문에서는 학교에서 다중드론 교육 운영 시 교수자가 다수의 드론을 실시간 감시하고 드론 간의 충돌을 사전에 학습자에게 인식시켜 실시간으로 다수의 드론 감시가 가능한 감시시스템을 제안하였다. 실험에서 사용된 통신 모듈은 Murata LoRa에 GPS를 탑재하였고, 실시간으로 수신된 위치 데이터를 기반으로 모니터링이 가능하도록 서버와 클라이언트를 구성하였다. 개방형 공간에서 제안한 시스템의 성능을 평가하였으며, 약 120m 거리까지 통신 신호가 양호함을 확인하였다. 즉 240m 범위 안에서 25대의 교육용 드론의 제어가 가능하고, 교수자가 모니터링할 수 있음을 확인하였다.