• Journal of Astronomy and Space Sciences
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• v.2 no.2
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• pp.117-129
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• 1985

Holmberg's diameters of galaxies $D_{h}$ were obtained from Holmberg catalogue. The difference between Holmberg's diameter and de Vaucouleurs' face-on diameter is campared with the results of Heidmann et al. The difference obtained in this paper is smaller than that of Heidmann at al. Also, the correlation between $D_{h}$ and $D_{v}$ was obtained for each type in de Vaucouleurs' classification of galaxies. It shows that $D_{h}$ is overestimated that $D_{v}$.

• Proceedings of the KSRS Conference
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• 2007.10a
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• pp.430-433
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• 2007

Spatial information has recently been recognized as one of the major subjects of interest in information technology. With increasing variety and quantity of spatial data on the web, searching and maintaining these data are becoming a much focussed area of research. Interoperability is the key technology in solving the complexities of spatial data in web services. The problem of maintenance and searching of spatial data in an interoperable web service environment can be solved by establishing standardized metadata of spatial information. Then using the standardized metadata, catalog web services can be deployed for autonomous searching and binding of spatial data. This study investigates the international standard for spatial data metadata(ISO/TC211 19115) and deployed catalog web service based on this metadata. Various heterogeneous spatial data of Seoul Metropolitan region were then used for experimental implementation of catalog web service.

• The Journal of Korean Medical History
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• v.25 no.1
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• pp.5-10
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• 2012

The aim of this study is to create a catalogue of amnesia synonyms in Traditional Korean Medicine for database utilization. A two-staged literature search was carried out. First, two databases(China National Knowledge Infrastructure:CNKI, Oriental Medicine Advanced Searching Integrated System:OASIS) were searched for eligible articles, and a set of candidate words was identified from the articles. Second, the candidate words were searched in 30 medical classics to check the frequency of use. As a result, 9 candidate words including 喜忘(huimang), 善忘(seonmang), 多忘(damang), 好忘(homang), 健忘(geonmang), 遂忘(sumang), 遺忘(yumang), 忘事(mangsa), and 易忘(imang) were identified from the 10 eligible articles. Among the 9 candidate words, 健忘(geonmang) was a descriptor and 7 other words including 喜忘(huimang), 善忘(seonmang), 多忘(damang), 好忘(homang), 遂忘(sumang), 遺忘(yumang), 忘事(mangsa) were non-descriptors. 易忘(imang) was not an adequate synonym for amnesia.

• Journal of the Korean Society for Library and Information Science
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• v.32 no.1
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• pp.45-67
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• 1998

The tendency of multimedia services and market of specialized information is currently much debated issur in our country. Nevertheless, the systematic investigation of demand for multimedea database is nowadays nowhere to be found. The purpose of this study is to gain a general overview of market and demand of service relating to multimedea database. At first, various definitions of multimedia, multimedia content, and multimedia database are analysed and evaluated from the point of technical and practical views. For the study on the demand for multimedia database of specialized information, database catalogue of DPCK 1997 and multimedia database on internet are analysed. After that the results of expert survey to estimate an accurate tendency of multimedia services in Korea are analysed.

• Journal of The Korean Astronomical Society
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• v.34 no.4
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• pp.181-190
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• 2001

The advent of robust, reliable and accurate higher order Godunov schemes for many of the systems of equations of interest in computational astrophysics has made it important to understand how to solve them in multi-scale fashion. This is so because the physics associated with astrophysical phenomena evolves in multi-scale fashion and we wish to arrive at a multi-scale simulational capability to represent the physics. Because astrophysical systems have magnetic fields, multi-scale magnetohydrodynamics (MHD) is of especial interest. In this paper we first discuss general issues in adaptive mesh refinement (AMR), We then focus on the important issues in carrying out divergence-free AMR-MHD and catalogue the progress we have made in that area. We show that AMR methods lend themselves to easy parallelization. We then discuss applications of the RIEMANN framework for AMR-MHD to problems in computational astophysics.

• Proceedings of the KIEE Conference
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• 2006.07b
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• pp.1034-1036
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• 2006

In this paper, I used microprocessor and sensor and designed to improve the efficiency of the photovoltaic system the photovoltaic position tracker device, and compared the normal photovoltaic system of fixed form with the photovoltaic system of solar position tracked form. Moreover, compared the catalogue of solar cell module and the simulation through a mathematics modelling with the solar cell's characteristic interpreting and, composed an power conversion system with boost converter and voltage source inverter. Used the constant voltage control method for maximum power point tracking in boost converter control and, used the SPWM(Sinusoidal Pulse Width Modulation) control method in inverter control.

• The Korean Journal of Malacology
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• v.18 no.2
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• pp.93-217
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• 2002

Molluscan specimens collected in the whole country of Korea during the from 1994 through 2002, were identified and classified. A total of 1,560 molluscan species were listed in this study; one species in class Aplacophora, 18 species in class Polyplacophora, 1,038 species in class Gastropoda, 467 species in class Bivalvia, 14 species in class Scaphopoda and 22 species in class Cephalopoda. Among the identified species, 360 species (three species in class Polyplacophora, 266 species in class Gastropoda, 85 species in class Bivalvia, 6 species in class Scaphopoda) are newly recorded to Korean fauna.

• Journal of Species Research
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• v.9 no.3
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• pp.288-323
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• 2020

A revised checklist of Korean Trichoptera is provided for the species recorded from the Korean Peninsula, including both North and South Korea. The checklist includes bibliographic research as well as results after reexamination of some specimens. For each species, we provide the taxonomic literature that examined Korean Trichoptera materials or mentioned significant taxonomic treatments regarding to Korean species. We also provide the records of unnamed species based on larval identification for further study. Based on taxonomic considerations, 20 species among the previously known nominal species in Korea are deleted or synonymized, and three species omitted from the previous lists, Hydropsyche athene Malicky and Chantaramongkol, 2000, H. simulata Mosely, 1942 and Helicopsyche coreana Mey, 1991 are newly added to the checklist. Hydropsyche formosana Ulmer, 1911 is recorded from the Korean Peninsula for the first time by the identification of Hydropsyche KD. In addition, we recognized 14 species of larvae separated with only tentative alphabetic designations. As a result, this new Korean Trichoptera checklist includes 218 currently recognized species in 66 genera and 25 families from the Korean Peninsula.

• Journal of Information Management
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• v.24 no.3
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• pp.57-72
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• 1993

The purpose of this study is to investigate the present status of foreign academic journal collection in Korea and to explore the problem. In order to survey the current situation, the data from "Union Catalogue of Foreign Journals:Science & Technology, 1992" database constructed by Korea Institute of Industry and Technology Information has been analyzed. Major problems are poor collections, collection overlap, and lack of resource sharing.

• The Bulletin of The Korean Astronomical Society
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• v.39 no.1
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• pp.47.1-47.1
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• 2014

We examine the effect of environment on star formation activity of a sample of galaxy group catalogue given in Tempel et al.(2012) constructed from the Sloan Digital Sky Survey Data Release 8. In order to compare galaxies in different environment, we classify galaxies into two groups: galaxies in low density environment and galaxies in high density environment. After matching colors and apparent magnitudes of the galaxies, we are left with 5912 galaxies in each of the environment category. The fraction of star-forming galaxies in low-density environment is ~34%, higher than ~15% in high-density environment. Star-forming galaxies in low density environment have a higher average SFR value than those in high density environment. The bulge-to-disk ratio for galaxies in two different environment shows bimodal distribution. Regardless of the environment, we find galaxies with high star formation rate despite their red (g-r) color, for which the origin enhancing their star formation rate is investigated.