• 한국실내디자인학회논문집
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• 제17권3호
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• pp.68-76
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• 2008

This study investigated composition elements and estimation of image in lobby from user viewpoint that is the central space of local cultural institution, and spectator mainly utilizes. Progress process of study develops investigation device including literature investigation, professional panel and lobby space image measurement tool through on-the-spot probe and, executed supporting research to spectator. As the result of the study, first, lobby space image exerts absolute effect to local cultural institution image-building, and is grasped on constituent that floor, ceiling, entrance and lighting and decoration is important in image-building of lobby space. Second, the image of the important lobby space was grasped in order of convenient image(M = 3.98) bright image(M = 3.87), and cozy image(M = 3.80). Third, the results on investigating semantic structure of the lobby image, emotional factor, styling factor, spatial factor, and peculiar factor are composed of important factors that decides image of lobby space. Fourth, as the result of image analysis for lobby space, the degree of satisfaction for the local cultural institution was entirely low against the importance. In particular, the image for convenience, individuality, locality and dignity was not sufficient in all the three places. Therefore, lobby design of local cultural institution shall also suggest more various lobby space image from culture oriented viewpoint.

• 한국농촌건축학회논문집
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• 제23권1호
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• pp.27-34
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• 2021

The senior welfare centers should provide integrated welfare services to the elderly whose needs are in change. So this paper tried to find a direction for improvement by identifying the spatial organization of the centers which are in Yeosu, Suncheon and Gwangyang. Classification of spaces of senior welfare center followed the guidelines 2020 for senior welfare center from Ministry of Health and Welfare which are consultation, medical rehabilitation, day or short-term protection, social education, home welfare, employment, welfare and public relations and PR planning and by adding management and public space. The above factors are invested and analyzed. The results of the survey and analysis of seven senior welfare centers are as follows. First, in the survey, the spatial organization of the senior welfare centers surveyed showed that the larger the size is, the dominantly lager the social education space is. Second, the space for day or short-term care, and employment is less than 1% of the total area, and most senior welfare centers do not have a basic space for this. Third, the space related to home welfare and counseling is very small, and more than half of the senior welfare centers do not have space related to it.

• 대한수학회논문집
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• 제33권2호
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• pp.581-590
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• 2018

In this paper, we consider surfaces in the 3-dimensional Euclidean space $\mathbb{E}^3$ which are of finite III-type, that is, they are of finite type, in the sense of B.-Y. Chen, corresponding to the third fundamental form. We present an important family of surfaces, namely, tubes in $\mathbb{E}^3$. We show that tubes are of infinite III-type.

• Journal of Astronomy and Space Sciences
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• 제7권1호
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• pp.57-69
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• 1990

The eighteen ultraviolet light curves of Epsilon Aurigae have been plotted using the integrated fluxes reduced from the 233 IUE low dispersion spectra taken between 1978 and 1986. The times of contacts and depth of eclipse have been determined from the light curves at the wavelength from 2550 $AA$ to 3050 $AA$. The UV light curves show two brightenings during the totality, the downward slope of the variation from the second to the third contacts, and asymmetry of the eclipse light curve. The two selected spectra note that the energy density distribution is not changed between the totality of the eclipse and out-of-eclipse.

• 호남수학학술지
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• 제44권3호
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• pp.391-401
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• 2022

In this study, we investigate the explicit characterization of spherical curves using the Flc (Frenet like curve) frame in Euclidean 3-space. Firstly, the axis of curvature and the osculating sphere of a polynomial space curve are calculated using Flc frame invariants. It is then shown that the axis of curvature is on a straight line. The position vector of a spherical curve is expressed with curvatures connected to the Flc frame. Finally, a differential equation is obtained from the third order, which characterizes a spherical curve.

• 대한지리학회지
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• 제44권3호
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• pp.301-322
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• 2009

본 논문은 국지적 이동성의 도시 기계 공간인 지하철 공간의 기호적 재현을 공간, 시간, 장소의 의미에서 탐구한다. 제2절은 기존 연구에서 제시된 이동성의 도시 공간의 전반적 특징을 '기계 공간', '(비-)장소', '인지 지도'의 개념을 중심으로 검토한다. 제3절은 대구 지하철 공간에 대한 '공간적' 및 '시간적' 재현의 기호들을 해석하고, 그 기호적 재현의 의미를 제시한다. 이를 통해 지하철 공간에 상호 조화적으로 혹은 모순적으로 공존하는 기호 경관들이 그 공간을 다중적, 복합적인 기술-사회 공간으로 생산한다는 것을 밝힌다. 지하철 공간의 공간적-시간적 재현은 한편으로는 '(비-)장소', 다른 한편으로는 '장소'의 공간을 형성하며 또한 한편으로는 '기억', 다른 한편으로는 '망각'의 공간화를 수반한다. 지하철 공간은 사람들이 이동하는 '이동성' 의 공간만이 아니라 기계 및 도시 공간을 바라는 방식에 영향을 주는 '정체성'의 공간으로 생각되어야 한다.

• 한국조경학회지
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• 제21권4호
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• pp.55-68
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• 1994

It has been generally agreed that the city form especially in the preindustrial age resembled their own world view, either in the western or the eastern cultural sphere. So, we aimed to redefine the characteristics of oriental world views compared with the western one, in order to find the relative nature of the Korean townscapes. It is said that the both world views(of western and oriental) are composed of the contrastive binary concepts in common, but there seems to have been nearly contrary differences in these two world views. Wheareas the former was based on the passively segregational and oppositional dualism, the latter, on the dynamically harmonious and complementary dualism, called generally as 'Yin(陰) and Yang(陽)'. Thus, the oriental world view can be thought as the 'philosophy of the relationship', which aim to unify the dualism ultimately with the help of this relationship. So, we can assume a certain third and intermediate concept between these dual concepts of the world view, which can unify these two into the one holistic whole. And the focuses of the most traditional oriental philosophies were concentrated on this, so called, 'the third concept', namely Taoistic 'Tochu(道樞)', Buddhistic 'Kong(空)' or Confucian 'Chung(中)'. And this triple concept, including the third one, of the oriental world view revealed a more concrete form of the cosmological relationship, as the triple structure; 'Heaven(天), Earth(地), and Man(人)', in which the 'Man' is thought as the middle or the center of the world. In this manner, we could found this oriental 'triple world view' was revealed in the real topology of most places in the Korean traditional city and the whole townscape itself. So, in the scale of houses and the roads around them, we can construe the 'Maru(a central board-floored room)' and the 'Madang(a inner court)' as the 'third and intermediate space(中)' between the interior space(陰) and exterior space(陽) in the former, and between the private house(陰) and the public residential road(陽) in the former case, and between the dual parts(陰,陽) of the city representing the contrary social classes and the contrastive visual landscapes. So, we insist that this 'triple world view' represented in the townscape can be one of the most important characteristics of Korean traditional townscape. And this third intermediate spaces, which generate the active social contact and the harmonious relationship among the people, can be the most important cues, as the central places, in the interpretation of the Korean townscapes even in contemporary circumstance, which inherits its spatial and social frame more or less from the preceding one.

• Journal of Astronomy and Space Sciences
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• 제26권2호
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• pp.141-156
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• 2009

근접촉쌍성 XZ CMi의 BV 측광관측을 수행하여 새로운 광도곡선과 총 7개의 극심시각을 획득하였다. 관측한 극심시각과 지금까지 발표된 극심시각을 수집하여 XZ CMi의 궤도 공전주기를 분석한 결과, 이 쌍성계의 공전주기가 지난 70년간 영년 주기감소와 더불어 규칙적으로 변화함을 확인하였다. 규칙적인 변화를 제3천체에 의한 광시간 효과로 가정하여 0.0056일의 진폭, 약 29년의 주기, 그리고 0.71의 궤도이심율의 광시간 궤도를 결정하였다. 관측된 영년 주기감소($-5.26{\times}10^{-11}d/P$)를 자기제동 항성풍의 각운동량 손실에 의한 주기감소($-8.20{\times}10^{-11}d/P$)와 질량이 작은 반성에서 주성으로 질량 이동에 의한 주기 증가($2.94{\times}10^{-11}d/P$)가 동시에 일어나는 것으로 해석하였다. 이런 관점에서 AML에 의한 주기감소율은 질량 이동에 의한 공전주기 증가율보다 그 크기가 약 3배 정도 크며, 반성에서 년간 $3.21{\times}10^{-8}M_{\odot}$의 질량이 주성으로 이동된다. 관측된 BV 광도곡선을 최근의 Wilson & Devinney 쌍성코드로 주성의 온도를 달리하는 두가지 모형(8200K와 7000K)을 상정하여 분석하였다. 두가지 모형 해 모두 XZ CMi가 반성이 로쉬 로브를 채웠으나, 주성은 아직 로쉬 로브를 채우지 않은 근접촉 쌍성임과 약 15-17%의 제3광도가 이 계에 있음을 보여준다. 그러나, 제3광도를 내는 천체가 주기연구에서 제안한 제3천체와 동일 천체가 아닌 것은 확실하다. 두 모형의 $\sum(O-C)^2$의 차이는 너무 미미하여, 현 시점에서 어느 해가 더 관측치를 잘 맞추는 지를 가릴 수는 없었다. 그간 연구자간에 불일치하였던 질량비의 다양성 문제는 아직도 풀리지 않는 숙제로 남아있다. 이를 해결하기 위해서 분광시선속도곡선과 스펙트럼의 관측과 더불어 정밀 측광관측이 필요하다.

• 대한전기학회논문지:전기기기및에너지변환시스템부문B
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• 제48권2호
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• pp.75-82
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• 1999

A compensation method of the motor parameters using zero sequence third harmonic voltage is presented for the speed sensorless vector control of the induction motor considering saturation of the flux. Generally, the air-gap flux of the saturated induction motor contains the space harmonic components rotating with the synchronous frequency of the motor. Because the EMF of the saturated induction motor contains the zero sequence harmonic voltages at the neutral point of the motor, those harmonic voltages can be used as a saturation index. In this work, the rotor flux observer is firstly designed for the speed sensorless vector control of induction motor. And a novel measurement method of the space harmonic voltage and a compensation method of th LPF(Low Pass Filter) are proposed. For compensating the non-linear variations of the magnetizing inductance depending on the saturation level of the motor, the dominant third harmonic voltage of the motor is used as a saturation function of the air-gap flux. And the variation of the stator resistance owing to the motor temperature can also be measured with the phase angle between the impressed voltage vector and the zero sequence voltage. The validity of the proposed parameter compensation scheme in the speed sensorless vector control using rotor flux observer is verified by the result of the simulations and the experiments.

• 항공우주정책ㆍ법학회지
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• 제21권1호
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• pp.65-95
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• 2006

항공기에 의하여 발생된 지상의 손해에 대한 책임이 국제적 수준으로 규정되어야 함은 필수적이다. 그러나 1952년의 "외국항공기에 의하여 발생된 지상 제3자의 손해에 관한 로마협약" 및 1978년의 "몬트리올 의정서"는 소수의 국가들이 그것을 비준하였기 때문에 전세계적으로 중요한 영향을 가지지 못하였다. 그리하여 세계민간항공기구 사무국은 2002년에 로마협약의 현대화를 위한 협약초안을 작성하였으며, 특별그룹은 현재까지 협약초안을 검토해오고 있다. 한편 협약초안은 항공기 운항자의 책임체제와 지상 제3자의 손해에 대한 위험의 부보가능성에 관한 주요한 문제들을 포함하고 있다. 한 국가의 항공운송 부문의 보호 뿐만 아니라 피해자의 신속한 회복을 용이하게 하기 위하여 로마협약의 현대화 작업은 계속되어야 하며 신협약은 가까운 장래에 마무리되어야 할 것이다.