• 천문학회보
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• 제44권2호
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• pp.53.1-53.1
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• 2019

The cosmic dark sector, composed of dark energy and dark matter, might be coupled, and hence mediate a fifth-force which gives rise to distinctive cosmological signatures. I will consider an interacting dark sector, in which dark energy and dark matter are coupled via specific well-motivated coupling functions. After an overview of these coupled dark energy models, I will discuss the current model parameter constraints derived from the latest cosmological observations which probe the expansion history, and the growth of cosmic structures of our Universe. Moreover, I will demonstrate how different measurements of the Hubble constant, including the GW170817 measurement, influence the inferred constraints on the dark coupling. I will further discuss how one could put tighter constraints on such a dark sector coupling with the upcoming large-scale radio surveys.

• 의료ㆍ복지 건축 : 한국의료복지건축학회 논문집
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• 제27권1호
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• pp.17-34
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• 2021

Purpose: The purpose of this study was to find out the difference in the priority level of recognition for universal design application in public spaces by gender. Method: ANOVA(analysis of variance) and post-hoc test were conducted to determine the priority level of recognition and pattern for the disabled, non-disabled, and experts classified into males and females. Results: There was no gender difference in the comparison by sector for all males and females. However, in comparing of domains and facilities, women showed a higher level of recognition than men in the building sector and cross domain. When comparing space consumers and producers by dividing them into male and female groups, women showed a higher level of recognition than men in producers, but there was no gender difference between consumers. In comparison by sector, domain and facility, women producers also showed a higher level of recognition in the road sector, park and recreation sector, sidewalk domain, four-spaces in the park and recreation sector, and six-spaces in the building sector than men producers. Also, in the building sector, women producers and consumers showed a higher recognition level than men. Comparing the disabled, non-disabled people and experts by dividing them into male and female groups, in the case of non-disabled people and experts, women showed a higher level of recognition than men, while men showed a higher level of recognition than women in the disabled. In addition, there were differences in recognition patterns in many spaces and facilities by gender. Implications: This study is meaningful in comparing the differences in the priority level of recognition and patterns between men and women to apply universal design for people of all ages and both sexes.

• 한국실내디자인학회논문집
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• 제3호
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• pp.38-45
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• 1994

The purpose of the present study is to suggest some directions intehdesign fo the hotel's lobby-lounge for public functions. In this study, some theoretical backgrounds reviewed from some literature were applied, and some results of the analysis of spatial features and utilized forms of public function for each sector respectively. with a review of some case studies were applied to this study as well, and thereby based on such application, it was attempted to experimentarily design the hotel's most desirable lobby-lounge for public functions. Specially in such design, expansion of the scale of the hotel's lobby-lounge, division of the line of a flow , the open front, approachability to the front desk, graudal arrangement of seats , formation of a walkway, and were service facilities were considered. In conclusion , since the hotel's lobby-lunge for public functions is a space which can accomodate various functions different from any other public space, thereby having a unique spatial system, it should be designed in consideration of the characteristics of function for each sector respectively.

• Journal of Astronomy and Space Sciences
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• 제21권4호
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• pp.303-314
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• 2004

In this paper we report some properties of inner magnetospheric structure inferred from the T01_s code, one of the latest magnetospheric models by Tsyganenko. We have constructed three average storms representing moderate, strong, and severe intensity storms using 95 actual storms. The three storms are then modelled by the T01_s code to examine differences in magnetic structure among them. We find that the magnetic structure of intense storms is strikingly different from the normal structure. First, when the storm intensity is large, the field lines anchored at dayside longitudinal sectors become warped tailward to align to the solar wind direction. This is particularly so for the field lines anchored at the longitudinal sectors from postnoon through dusk. Also while for the moderate storm the equatorial magnetic field near geosynchronous altitude is found to be weakest near midnight sector, this depression region expands into even late afternoon sector during the severe storm. Accordingly the field line curvature radius at the equator in the premidnight geosynchronous region becomes unusually small, reaching down to a value less than 500 km. We attribute this strong depression and the dawn-dusk asymmetry to the combined effect from the enhanced tail current and the westward expansion/rotation of the partial ring current.

• 수산해양교육연구
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• 제27권1호
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• pp.218-229
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• 2015

While promoting a variety of projects by using sea space, there has been a lot of social controversy among the stakeholders based on the results of the analysis. In particular, the benefits of fisheries sector were over-estimated and occurred a lot of opposition from fishermen and environment groups. In order to this solve, we have been studied focussed such as excavation of new projects, the method and result of the estimated benefits for fisheries sector. With regard to the tidal power plant of Garolim, we came up with five kinds of problems such as doing not reflect of the cost of the initial investment, over unit production, over unit price, excessive selection of breed, issues of cost of production in benefits study of fisheries sector derived previously. In order to these problems, we have derived new profitable projects based on the initial materials such as improvement of raising breed, discharge project of fingerlings and a small sea ranch project. As a result, previous study was analyzed in 30.2 billion won(1993), 54.8billion won(2009), but this study was estimated to 26.4 billion won and differences of benefits amount were occurred. In a previous study was calculated benefits by simple method, but this study came up with new projects for fisheries sector and because we estimated benefits considering new project. The method for benefits calculations for fisheries sector was not attempted in previous studies and in this study, we approached for the first time Also, in this study suggested new method to increase incomes fishermen such as development of suitable ranch breeding for the marine environment, ranch license(limited license), development of fisheries resources and the operation of fisheries facility. In the future, we hope to be helpful for the same field of study.

• Journal of Astronomy and Space Sciences
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• 제32권4호
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• pp.305-310
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• 2015

In this study, we examined a morningside Pi2 pulsation, with a non-substorm signature, that occurred in very quiet geomagnetic conditions (Kp = 0) at 05:38 UT on December 8, 2012, using data obtained by Van Allen Probes A and B (VAP-A and VAP-B, respectively) and at a ground station. Using 1 sec resolution vector magnetic field data, we measured the X-component of the pulsation from the Abu Simbel ground station (L = 1.07, LT = UT +2 hr, where LT represents local time) in Egypt. At the time of the Pi2 event, Abu Simbel and VAP-A (L = 3.3) were in the morning sector (07:38 LT and 07:59 MLT, respectively, where MLT represents magnetic local time), and VAP-B was in the postmidnight sector (04:18 MLT and L = 5.7). VAP-A and VAP-B observed oscillations in the compressional magnetic field component (Bz), which were in close agreement with the X-component measurements of the Pi2 pulsation that were made at Abu Simbel. The oscillations observed by the satellites and on the ground were in phase. Thus, we concluded that the observed morningside Pi2 pulsation was caused by the cavity resonance mode rather than by ionospheric current systems.

• 한국산학기술학회논문지
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• 제14권6호
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• pp.3005-3012
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• 2013

공공적 주체로 대표되는 한국자산관리공사가 시행하였던 국유지 위탁 시범개발사업의 특성분석을 통하여 공공성의 확보를 위한 유휴공간의 공간재생 시 고려되어야 할 내용을 공간, 용도, 과정의 측면에서 분석한다. 여기에서 각각 다음의 한계를 나타내는데 비연속적 공공공간은 공공주체가 민간주체의 개발이익 사업과 다름이 없음을 보여주며, 비 공공적 용도의 배치는 공공성과 이익성의 균형을 맞추기에 원천적인 한계를 나타낸다. 또 폐쇄적인 과정에서는 공개성이라는 공공성의 원칙을 지키기 힘들며 공공의 참여와 관심을 유도하는 공공적 재생의 실현에 한계를 보일 수밖에 없다. 이상과 같이 공간, 용도, 과정의 측면에서 살펴본 바 다음과 같은 결론을 도출하였다. 1. KAMCO가 시행하는 프로젝트는 공공기관이나 공공성을 적정한 수준에서 담보하는 절차가 반드시 필요하다. 2. 수탁기관이 청구하는 위탁수수료의 적정한 보장과 이익의 한계선을 공공주체는 프로젝트 기획 시 명확히 하여 일정부분이 공공성을 향상시키는데 쓰여야 한다. 3. KAMCO의 다양화된 공개방식의 개발과 건축계획이 필요하다. 그리고 KAMCO 개발의 건축적 공간계획에서 공공성을 담보할 수 있는 자율성과 심의 할 수 있는 전문기구와 예산이 요구된다.

• 한국산학기술학회논문지
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• 제12권11호
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• pp.5321-5329
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• 2011

공간배치는 총 에너지 사용량의 20% 이상을 차지하는 교통 부분에서의 탄산가스 배출량을 결정하는 중요한 이슈이다. 교통 부분에서 사용하는 에너지 사용량을 줄이는 방법으로서 고효율의 교통수단 개발과 함께 도시에서의 이동량을 효과적으로 감소시킬수 있는 공간배치의 중요성이 더욱 증가하고 있는 실정이다. 이러한 맥락에서 본 연구에서는 도시계획 초기 단계에서 토지이용계획 및 교통계획을 기반으로 해당 도시에서의 이동 발생량을 추정할 수 있는 방법론을 제안한다. 본 연구에서는 토지이용계획 및 교통계획에서 획득할 수 있는 정보, 즉 단위 기능 용도 지역의 위치, 면적, 연면적, 도로체계와 같은 정보만을 이용하여 이동량을 추정할 수 있는 방법을 제시한다.

• 한국우주과학회:학술대회논문집(한국우주과학회보)
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• 한국우주과학회 2004년도 한국우주과학회보 제13권1호
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• pp.72-72
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• 2004

We have compared here the seasonal average of the plasma density with the EPB occurrence in a given longitude sector, using KOMPSAT-1 and DMSP data. It could be evidenced on a global scale that the EPB occurrence was nearly anti-correlated with the poleward drift speed parallel to B-field, and with the degree of asymmetry of the latitudinal plasma distribution. But, the seasonal-longitudinal change of the asymmetry was different from what the current theory expected. (omitted)

• 대한안전경영과학회지
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• 제18권3호
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• pp.47-54
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• 2016

A confined space means places where the risk of damage to health caused by lack of oxygen or hazardous gases in inadequate ventilation conditions and the risk of fire and explosion caused by flammable substances. Asphyxiation accidents in a confined space occured every year and also occurred more than two people at the same time. In this study, we surveyed the domestic statistical data occurred the lack of oxygen in confined space for the last 10 years(2006-2015) and, analyzed the accident by industries sector, workplace size etc. 17 fatal work accidents that occurred in confined spaces in Korea between 2013 and 2015 were investigated and analyzed using the database of the KOSHA and suggested interventions to minimize asphyxiation accidents in confined spaces. This paper is expected to be used to establish interventions planning and training as a preventive measures in workplace having confined spaces.