• Journal of Astronomy and Space Sciences
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• 제25권4호
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• pp.375-382
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• 2008

On August 31, 2001, ${\sim}$ 1705 - 1718 UT, Cluster was located near the midnight magnetotail, GSE (x, y, z) ${\sim}$ (-19, - 2,2) RE, and observed fast earthward flow bursts in the vicinity of the neutral sheet. They occurred while the tail magnetic field suddenly increased. Using simultaneous measurements in the solar wind, at geosynchronous orbit, and on the ground, it is confirmed that tail magnetic field enhancement is due to an increased solar wind pressure. In the neutral sheet region, strongly enhanced earthward flow bursts perpendicular to the local magnetic field $(V_{{\perp}x})$ were observed. Auroral brightenings localized in the pre-midnight sector (${\sim}$ 2200 - 2400 MLT) occurred during the interval of the $V_{{\perp}x}$ enhancements. The $V_{{\perp}x}$ bursts started ${\sim}$ 2 minutes before the onset of auroral brightenings. Our observations suggest that the earthward flow bursts are associated with tail reconnection directly driven by a solar wind pressure impulse and that $V_{{\perp}x}$ caused localized auroral brightenings.

• 기술혁신학회지
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• 제6권1호
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• pp.20-40
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• 2003

Many studies have regarded an information infrastructure as one of the crucial factors for national or regional innovation in the information society, but few studies have empirically tested the role and the effects of it. Also, the information society have been studied to what extent, but information space structure and the reorganization for the resource of the material and the labour have not been considered. Therefore, this study is examining the relation between the linkage structure and the information change in the manufacturing sector. And for the empirical analyses, regional labour data for 16 Metropolitan Areas(Si) and Provinces(Do) in 1991-1996 are used. An analytical model and hypotheses are proposed for empirical testing. The main finding is that if inter-regional wages condition is identical, inter-regional labour flow has positive correlations with regional information level.

• 한국철도학회:학술대회논문집
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• 한국철도학회 2005년도 춘계학술대회 논문집
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• pp.263-268
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• 2005

Recently, restrooms have become a crucial aspect of improving quality of life as a redefined living sector. That offer the functional convenience to user by expansion of toilet space and various subsidiary facilities through reconfiguration of space and automation of equipment naturally, is changing to independent culture space that it is that is comfortable with a rest that comfort and affection overflow using finish introduction and properties of high-quality site. However, existing restrooms in current railway vehicle have not fulfilled such desire and short failed in many aspects of such needs. Even in restrooms for High-Speed Rail System have many areas to improve. Thus, factors encountered by users of rail system have been visually, environmentally and functionally classified.

• 한국태양에너지학회 논문집
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• 제40권1호
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• pp.35-47
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• 2020

Due to the large window area, the lighting environment of the educational space between the window and deep part of the room is not uniformly illuminated, and the phenomenon of glare is severe. For this reason, the daylight performance of DSC-BIPV windows was analyzed in order to improve the natural lighting in the educational sector. The method derives the correlation with natural lighting by measurement and simulation. Dynamic simulation confirmed that the average illuminance of the target space was higher at later than the early afternoon. The performance of natural lighting at 40% and 30% transmission of DSC has the effect of significantly reducing the amount of excess light in existing windows. Nevertheless, the actual average illuminance in all seasons corresponds to the standard illuminance of the educational facility, 300 Lux. In addition, the uniformity is also seen through the skylight illuminance ratio.

• 항공우주시스템공학회지
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• 제16권2호
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• pp.33-38
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• 2022

최근들어 우주분야가 빠르게 변화하고 있다. 우주군과 같은 우주의 군사화가 공개적으로 진행되고 있다. 또 한편으로는 정부 자금에 의한 정부 주도의 우주개발에서 뉴스페이스라고 불리는 민간 자본에 의한 우주상업화가 미국을 중심으로 크게 부각되고 있다. 여기에 미국은 아폴로 프로그램 종료이후 50년만에 유인우주 달탐사 사업인 Artemis 사업이 추진되고 있으며, 이에 수반하여 우주자원의 상업적 활용이 적극적으로 논의되고 있다. 비약적으로 발전하고 있는 우주기술로 인해 크게 1967년 제정되어 지금까지 우주활동의 규범을 제시해 온 우주조약은 수명이 다해가는지 모른다. 국제규범의 개정은 여러 국가의 이해관계가 반영되어야 하는 쉽지 않은 과정이다. 그럼에도 불구하고 새로운 우주시대를 맞이하려면 우리나라도 이러한 변화를 맞아들이기 위한 다양한 법적·정책적 연구가 필요하다.

• Journal of Astronomy and Space Sciences
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• 제28권1호
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• pp.27-36
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• 2011

The present study examines the morning-afternoon asymmetry of the geosynchronous magnetic field strength on the dayside (magnetic local time [MLT] = 06:00~18:00) using observations by the Geostationary Operational Environmental Satellites (GOES) over a period of 9 years from February 1998 to January 2007. During geomagnetically quiet time (Kp < 3), we observed that a peak of the magnetic field strength is skewed toward the earlier local times (11:07~11:37 MLT) with respect to local noon and that the geosynchronous field strength is larger in the morning sector than in the afternoon sector. That is, there is the morning-afternoon asymmetry of the geosynchronous magnetic field strength. Using solar wind data, it is confirmed that the morning-afternoon asymmetry is not associated with the aberration effect due to the orbital motion of the Earth about the Sun. We found that the peak location of the magnetic field strength is shifted toward the earlier local times as the ratio of the magnetic field strength at MLT = 18 (B-dusk) to the magnetic field strength at MLT = 06 (B-dawn) is decreasing. It is also found that the dawn-dusk magnetic field median ratio, B-dusk/B-dawn, is decreasing as the solar wind dynamic pressure is increasing. The morning-afternoon asymmetry of the magnetic field strength appears in Tsyganenko geomagnetic field model (TS-04 model) when the partial ring current is included in TS-04 model. Unlike our observations, however, TS-04 model shows that the peak location of the magnetic field strength is shifted toward local noon as the solar wind dynamic pressure grows in magnitude. This may be due to that the symmetric magnetic field associated with the magnetopause current, strongly affected by the solar wind dynamic pressure, increases. However, the partial ring current is not affected as much as the magnetopause current by the solar wind dynamic pressure in TS-04 model. Thus, our observations suggest that the contribution of the partial ring current at geosynchronous orbit is much larger than that expected from TS-04 model as the solar wind dynamic pressure increases.

• 토지주택연구
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• 제7권4호
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• pp.207-215
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• 2016

본 논문은 영세한 제조업체들을 지원하기 위해 도입되었던 아파트형 공장이 민간에 의해 주도되면서 고급화, 오피스화, 고가화됨에 따라 본래 취지와는 달리 영세 제조업체에게 도시 내 생산공간을 제공하기 어렵게 되었다는 문제인식 아래 공공부문에서의 아파트형 공장의 건축방안을 모색하고자 연구를 실시하였다. 이에 본 연구는 1984년 협동화사업으로 도입된 아파트형 공장에서부터 최근(2000년대 이후) 공급되고 있는 지식산업센터를 대상으로 아파트형 공장의 건축적 특징을 분석하고, 미래 건축트렌드 전망, 기업체 설문결과 등을 바탕으로 공공아파트형 공장의 공급방향 및 건축방안을 제시하였다. 그 결과, 공공에서 공급하는 아파트형 공장은 현재 민간에서 공급하는 오피스 위주의 아파트형 공장과는 차별화된 제조형 아파트형 공장의 건축이 적절하며 공급방식도 분양보다는 임대를 위주로 공급하는 것이 민간시장을 보완하는 효과가 있을 것이다. 그리고 저렴한 건축비용과 임대비용을 위해 화려한 외장보다는 경제적인 내외장재를 활용한 설계와 제조활동에 최적화된 내 외부 공간의 설계가 필요하다. 특히 충분한 주차공간 확보 및 하역과 창고, 물류를 고려한 동선설계 등이 지금의 지식산업센터와 차별화될 부분임을 도출하였다.

• 대한지구과학교육학회지
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• 제6권3호
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• pp.252-260
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• 2013

The purpose of this study is find out the correlation of level of knowledge of pre-service elementary teacher with space perception ability on 'Earth and Space' of elementary science. During the second semester of 2013, for 15 weeks, the classes were conducted for 3 hours per week and we find out knowledge Understanding degree and select terms offered by 5th grade science courses 'The solar system and the stars', 'Earth and Moon', 'change of seasons' section and measured space perception ability degree of pre-service elementary school teacher with a questionnaire. We analyzed the correlation of understanding level of knowledge in the field of astronomy of pre-service elementary school teacher with space perception ability. The results of the study are presented as follows. First, pre-service elementary school teacher showed a low level of knowledge understanding as it goes the upper grades about upper concept in 'The solar system and the stars', 'Earth and Moon', 'change of seasons' section' of astronomy area of elementary science 'Earth and space sector'. The pre-service elementary school teachers needs to acquire knowledge of astronomy area in elementary school curriculum. Second, pre-service elementary school teacher showed that there are differences individually in 'finding solid body' of sub-element of space perception ability. This shows that 'finding solid body' factor is associated with space perception ability. Third, in the section of 'The earth and the Universe' for elementary education, 'Reflection' and 'Finding solid body' which are low-level components of space perception ability were verified that have a corelationship with general grades in the astronomy conception test.

• 한국실내디자인학회논문집
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• 제4호
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• pp.10-15
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• 1995

Along with the recent pressures for market liberalizations in the legal services sector, the topsizing, multinationalization, and specialization of Law Firms have brought about the need for them to view the profession itself from a marketing perspective and promote corporate identity to improve productivity and garner clientele. With this in mind, this study attempts the revamping of the traditionally, conservative and cramped characteris-tics of Law Firms' interior space into more open and dy-namic ones with a contemporary and international feel which are also superior from a marketing viewpoint.

• Journal of Astronomy and Space Sciences
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• 제19권2호
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• pp.133-140
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• 2002

다목적 실용 위성 1호는 1999년에 발사되어 운용되고 있으며 , 과학 탑재체로 우주과학센서(Space Physics Sensor)를 탑재하고 있다. 이중 SPS IMS는 2000년 6월부터 2001년 8월에 이르는 태양 활동 극대기 동안 지구 이온층에 관한 정보를 지상으로 전송하였다. 다목적 실용위성 1호가 적도지 역을 통과할 때 전자 밀도가 급격 히 감소하는 플라즈마 밀도 불균일 현상(equatorial bubble)이 자주 관측되었다. SPS IMS가 운용된 기간 동안의 데이터를 통계적으로 분석 한 결과, equatorial bubble 현상은 지구 자기장의 크기가 약한 대서양 지역에서 자주 일어났고, 또한 Kp 간이 낮을 때에 더욱 빈번하게 발생하였다. 이는 기존의 DMSP위성을 통한 관측 결과 및 페루 지역의 라디오 관측 결과 등과 상당한 수준의 일치를 보이고 있다. 밀도 불균일 지역 내의 전자 온도 변화는 전자 밀도 변화와 다양한 상관 관계를 나타낸다.