• The Bulletin of The Korean Astronomical Society
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• v.44 no.2
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• pp.71.2-71.2
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• 2019

In order to gather clues to surface mineralogy of asteroids, we classify their taxonomy based on their reflected spectra. It is remarkable that a large number of asteroids plotted in the proper orbital element space with distinct colors according to their taxonomic types reveal the dynamical evolution and the structure in the near-Earth space, the main-belt and beyond. Although we have ~1×10⁶ known objects, no more than ~3×10³ of them are properly classified taxonomically as visible-near infrared spectroscopy is costly. On the other hand, multi-wavelength broadband photometry in the visible region provides a rather inexpensive alternative tool for approximate taxonomy. Thus we have conducted multi-band observations systematically using Korea Microlensing Telescope Network (KMTNet) with BVRI and griz filters since back in 2015. We then applied aperture photometry with elliptical apertures to fit the trails of objects during the exposures, and classified them with the principle component indices of Ivezic et al. (2001). We will make use of our new, three dimensional asteroid classification scheme for the next step.

• Korean Institute of Interior Design Journal
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• v.22 no.5
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• pp.284-292
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• 2013

The study performed analysis focusing on specialized convention and exhibition facilities among convention and exhibition facilities in Korea. The procedures and results were as follows: First, by theoretical consideration, meaning and contents of convention and exhibition programs done in convention and exhibition facilities were considered and after that, general characteristics of the programs which were the main of space utilization was derived. Second, considering scale and location, 6 facilities were re-selected for in-depth research from 12 facilities investigated preliminarily. Selected facilities were categorized by scale and through the analysis of programs done in this facilities for the last 1 year, overview and characteristics of utilization for exhibition space, conference space, and multi-purpose space, etc were analyzed. Third, through the case study on the programs, individual characteristics of space utilization by convention and exhibition program were analyzed. From the result of the study, considering the whole, the space utilization of programs was done as conference space rather than exhibition space and the ratio of use as conference space to use as exhibition space was 1.8 in the large facilities, 6.7 and 7.6 in the middle facilities and the small facilities, respectively. In the middle and small facilities, the ratio of use of one room as conference space was very high. In the large facilities, there was no big difference with the ratio 50:50 of the programs involving exhibition to other programs, but in the middle and small facilities, the ratio of the former to the latter was observed over 2.4 and 3.6. This fact indicated that the function of use as promotion and communication space for companies and industrial entities which were the essential purposes became low.

• Proceeding of Spring/Autumn Annual Conference of KHA
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• 2011.04a
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• pp.153-158
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• 2011

According to the change of life environment and economic growth, the more city has highly developed, the more concentrated urban function. That is, city is required for adding infra structure. But, both of limited land resources and financial problems made it impossible to add infra structure. So, the necessity of multi-dimensional planning of urban infra structure was recognized. Especially, In Urban residential area, in order to secure parking area, It is on the increase that mixed-use of the playground of school in the high density area and the empty space of park. School and park is closely connected with town community, playing a central role on town life. For this reason, they are highly demanded for providing space in the urban residential area and also expected to be effective. However, people using park and school are almost young students and the elderly, it needs to consider not only the parking convenience also the safety of users in design process. In this study, we analysed the physical characteristics and the utilization of mixed-use of school and park. and then evaluated the case in the point of convenience and safety. For this, first we selected the case among the sites constructed in seoul, and divided 2type of 'slope type' and 'flatland type'. The meaning of this study is to suggest elementary standards for design in the point of multi-dimensional land use planning.

• Korean Institute of Interior Design Journal
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• v.15 no.3 s.56
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• pp.24-32
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• 2006

Through the increasing of social economies and cultural activities, the Food service industry have been growing up steadily in spite of low economic activity. This is owing to increasing income, participation of women in public affairs and a dual-income family, automobile culture, desire for healthful food, shorten working hours, changing of cultural style. Moreover, the recent importance of Interior finishing materials by means of fire in the Restaurant, legal fractional multiple use business establishment are recognized of publicity. Therefore, This Study aim object at probing into the characteristic of Interior finishing material and then analysing the characteristics of space and material according to the typical distribution. In the Interior planning of Restaurant, firstly it is need to probe the Characteristics of interior finishing material at the basic element. This study is going to apprehend the constitution of space and difference of proportion or a point of sameness in the characteristics of material. Moreover, the recent importance of Interior finishing materials by means of fire in the Restaurant, legal fractional multiple use business establishment are recognized of publicity. Throughout probe and analysing, it can append more efficiency and elasticity in the usage of interior finishing material.

• Architectural research
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• v.15 no.4
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• pp.191-200
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• 2013

Since Modern Movement flexibility has been one of the most attractive words in architecture. However, "overprovision first, division later" has been the most prevailing design method for spatial flexibility, and many of buildings designed for flexible use are practically quite inflexible due to insufficient building systems or/and irresponsible planning. There have been two dominant strategies to achieve architectural flexibility: multi-functionality and polyvalence. These two approaches, which point contradictory directions, actually reflect the difficulty in providing a proper form of architectural flexibility. Multi-functionality can afford changeable environments with satisfying spatial conditions; however it lacks tolerance to accommodate other uses but intended functions by architects. Meanwhile, flexibility by a polyvalent form relies on the vague anticipation of user's various interpretations. In this study by looking up these two different standpoints and historical precedents flexibility in architecture is carefully scrutinized focused on the contradiction, and as an alternative for architectural flexibility contextual relations is proposed. Unlike both multi-functionality and polyvalence, which produce flexibility by changing its own properties, manipulating contextual relations infuses flexibility into space by changing the properties of a building, not of its individual room. By using this contextual relations method, a community-centered school in Manhattan, NY, which was in danger of being closed because of its academic failure, is represented as a flexible space.

• The Transactions of The Korean Institute of Electrical Engineers
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• v.56 no.6
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• pp.1071-1079
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• 2007

In this paper, a novel space vector control method for isolated multi-level inverter using 3-phase low frequency transformers is proposed. This method is based on the simplification of the space-vector diagram of a five-level inverter using calculated table into fully programming method. The execution time of the proposed method is about same as that of the method using calculated table. Also, the proposed method is easily applied to other case level inverter. We applied this method into the 3-phase IHCML inverter using common arm. It makes possible to use a single DC power source due to employing low frequency transformers. In this inverter, the number of transformers could be reduced compare with an exiting 3-phase multi-level inverter using single phase transformer. In addition, this method generates very low harmonic distortion operation with nearly fundamental switching frequency. Finally, We tested multi-level inverter to clarify electric circuit and reasonableness through Matlab simulation and experiment by using prototype inverter.

• Korean Institute of Interior Design Journal
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• v.17 no.3
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• pp.59-67
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• 2008

This study aims to find out the characteristics and the type classification of contemporary public libraries in terms of browsing circuit. In so doing, it is to analyze 21 recently built libraries by using the browsing circuit, the spatial depth and the spatial layout. The study makes use of codes derived from the concept of 'Classification' and 'Frame' suggested by a pedagogist, Basil Bernstein. As a result, it shows that two codes are phased in overseas cases. In other words, one type is a lower depth of space and a high rate of rings with the multi-layer circuits and the three-dimensional circuit of multi-centered. the other type is the higher depth of space and a low rate of rings with the single-layer circuit and the multi-layer circuit of single-centered. In domestic cases, 4 types are shown. The characteristics of layout are seen as a radial shape and the rate of rings is lower than the overseas cases. It can be said that these results are a transitional phenomenon. For browsing circuit, domestic public libraries would be adapted to the three-dimensional circuit of multi-centered, a lower depth of space and a high rate of rings. By instructions of this plan, the real meaning of a public library will be come true.

• Proceedings of the SAREK Conference
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• 2009.06a
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• pp.1470-1475
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• 2009

Until now for the safety of structures and equipment monitoring technology to measure the amount of the physical, if that is the one, one-point or single-source target is one the most. Therefore, becoming more numerous and complex to measure the amount of physical measurement technology that is comprehensive and complex, multi-source concepts to the monitoring of a multi-sensing technology is required. Have the same characteristics of multi-source multi-use space such as a multi-structure of facilities/equipment is. The people's safety in a multi-use facility will be directly related to life and even a little carelessness can lead to large-scale disaster occurs because of several factors, risks and to manage detect in advance the development of an intelligent monitoring technology is essential. Therefore, this study shows that multiple structures/facilities to improve the quality of human life in research to maintain a safe and comfortable living space for multi-source intelligence to the development of monitoring technology to achieve that goal, and the ubiquitous sensor network system on the basis of the wireless transmission module, and multiple research facilities/equipment for the ultra-small sensors for health monitoring study was performed.

• Journal of the Korean Institute of Educational Facilities
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• v.12 no.1
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• pp.29-40
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• 2005

The purpose of this study is to comprehend the utilization, the establishment and the claim of multipurpose space which was corresponded to the 7th National Curriculum, and to examine the use of multipurpose space. The subjects of this study are new or second amenable elementary schools. The conclusion of this study is as follow. 1) Teachers partly agree to the induction and the direction of the 7th National Curriculum, but they think that it is too early to carry it out and most of them think that it is better than old curriculum. 2) According to a report of contentment of multipurpose space, most of teachers are satisfied by multi- purpose space. The main factor responded by 59.8% of total respondents is to study variously. It means teachers highly evaluate the need of various system of studying. 3) The depth of a multipurpose space including the depth of a hallway is suitable 7.2m as 31.3% of respondents and 6.0m as 30.4%. 4) The main factor of dissatisfaction is noisy and ventilation because of the protection between the multipurpose spaces.

• Proceeding of Spring/Autumn Annual Conference of KHA
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• 2005.11a
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• pp.185-188
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• 2005

With the development of digital technology and the advent of the concept of well-being, kitchen will be worked as the center of housing and turn into multi-functional space. So a research is requested to consider the users' needs for kitchen based on their life characteristics. The purpose of this study is to find out housing lifestyles, and to search and analyze users' needs for kitchen planning according to their lifestyles. And then plans for kitchen design are suggested. The findings are as follows. (1) Housing lifestyles of users living in apartment are categorized into the type of network and trial & development, pursing the new environment and technology, the type of high quality and convenience, seeking the way to make housework easy and comfortable, the type of housework oriented and the type of unspecification. (2) The type of network and trial & development requests home automation, confrontation layout of counter-top, the type of high quality and convenience requests enlargement of kitchen space, the newest appliance and kitchen island, the type of housework oriented requests the efficiency of space utilization with a counter-top style table, and the type of unspecification asks space for study and office work. All of the types have needs for water use space, larger storing space and a Kimchi refrigerator.