• The Bulletin of The Korean Astronomical Society
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• v.34 no.1
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• pp.193-193
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• 2009

• The Bulletin of The Korean Astronomical Society
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• v.41 no.2
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• pp.31.1-31.1
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• 2016

SNe light curves have been used to understand the expansion history of the universe, and a lot of efforts have gone into understanding the overall shape of the radioactively powered light curve. However, we still have little direct observational evidence for the theorized SN progenitor systems. Recent studies suggest that the light curve of a supernova shortly after its explosion (< 1 day) contains valuable information about its progenitor system and can be used to set a limit on the progenitor size, R*. In order to catch the early light curve of SNe explosion and understand SNe progenitors, we are performing a ~8hr interval monitoring survey of nearby galaxies (d < 50 Mpc) with 1-m class telescopes around the world. Through this survey, we expect to catch the very early precursor emission as faint as R=21 mag (~0.1 Rsun for the progenitor). In this talk, we outline this project, and present a few scientific highlights, such as the early light curve of SN 2015F in NGC 2442.

• Journal of the Korean Society of Propulsion Engineers
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• v.25 no.3
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• pp.101-112
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• 2021

SpaceX shows various strategies such as constructing various payload portfolio through the reuse of Falcon 9 and Falcon Heavy, constructing the launch vehicles using one type of engine, the transition from kerosene engine to methane engine, and the use of 3D printing. In this study, launch vehicle proposals that can cover a variety of payloads and trajectories from KOMPSAT to GEO-KOMPSAT were constructed, and ten launch vehicles using kerosene gas generator cycle engine, kerosene staged-combustion cycle engine, and methane staged-combustion cycle engine were reviewed. Of the ten launch vehicles, the reusable launch vehicle using a 35-ton methane engine was rated as the best in terms of development potential.

• Proceeding of Spring/Autumn Annual Conference of KHA
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• 2004.11a
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• pp.277-282
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• 2004

A Study traditional folk house and primary factor from investigation of Wang-Gok villages space composition program which is contains regional color, economy, rationality. From that's all, Analysis the effect of modern life style to folk house space pattern change and a primary factor of northern traditional fork house type of Korea. 1. Analysis and arrangement space composition structure about natural${\cdot}$geographical${\cdot}$cultural environment. 2. Examination existing commoner's house research by a region, space program for understanding house pattern, specially double rows which are partitioned by walls in northern part of Young-Dong region. 3. Analysis folk house character and object house information. by the way, Investigation changing of commoner's house space program with modem life style.

• The Bulletin of The Korean Astronomical Society
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• v.38 no.1
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• pp.68.1-68.1
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• 2013

The K-GMT group launches a new science program designed to promote the observational research capabilities of Korean Astronomical Society. The science program (SP, hereafter) will provide the access to the observational facilities that is required for the completion of science proposals selected based on their scientific merits. The SP will invite the submission of proposals from all members of Korean Astronomical Society annually starting from mid-2013. We will introduce the rationale, action plan, and major timelines for the new K-GMT SP to the Korean astronomical community members.

• The Bulletin of The Korean Astronomical Society
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• v.45 no.1
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• pp.67.3-68
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• 2020

A prime focus telescope, e.g., Schmidt telescope, has advantages especially for a wide field of view survey in astronomy. In this optical configuration, the camera is placed in front of the primary mirror. Since the installation of a typical filter wheel to the prime focus telescope causes serious obscuration of the incoming light, a customized filter device is required for high sensitivity images. In this poster, we present a new filter exchange mechanism, which can host four filters moving along quadrant directions. We plan to install this on the Celestron 36 cm Rowe-Ackermann Schmidt Astrograph (RASA 36) located at El Sause Observatory in Chile.

• The Bulletin of The Korean Astronomical Society
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• v.32 no.1
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• pp.24.2-24.2
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• 2007

• Proceeding of Spring/Autumn Annual Conference of KHA
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• 2008.11a
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• pp.188-192
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• 2008

The Purpose of this paper is to analyze of community space of high-rise housing as a basic research towards developing a model of spacial convergence. For this, 10 cases of high-rise housing complexes are compiled. Research methods are as follows. First, through the analysis of 10 high-rise housing complexes, the types of community space program are categorized by concepts. Second, community space plans are analyzed by floor. The results of this study are summarized as follows. First, through the analysis of 10 cases, the types of community space program are classified 8 categories : Culture, Health, Leisure, Education, Life-style Assistance, Business Assistance, Open Space, Commercial Facility. Second, community space plans are arranged at the lower floor of the building at a high ratio. Third, the types of convergence model for community programs are suggested by 4 categories : Human, Time, Experience, Local Community. Fourth, community space configuration is categorized by 4 types.

• The Bulletin of The Korean Astronomical Society
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• v.29 no.2
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• pp.25.2-25.2
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• 2004

• The Bulletin of The Korean Astronomical Society
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• v.28 no.2
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• pp.96-96
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• 2003