• Journal of The Korean Astronomical Society
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• v.47 no.5
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• pp.195-199
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• 2014

We present a GUI-based interactive Python program, VIMAP, which generates radio spectral index maps of active galactic nuclei (AGN) from Very Long Baseline Interferometry (VLBI) maps obtained at different frequencies. VIMAP is a handy tool for the spectral analysis of synchrotron emission from AGN jets, specifically of spectral index distributions, turn-over frequencies, and core-shifts. In general, the required accurate image alignment is difficult to achieve because of a loss of absolute spatial coordinate information during VLBI data reduction (self-calibration) and/or intrinsic variations of source structure as function of frequency. These issues are overcome by VIMAP which in turn is based on the two-dimensional cross-correlation algorithm of Croke & Gabuzda (2008). In this paper, we briefly review the problem of aligning VLBI AGN maps, describe the workflow of VIMAP, and present an analysis of archival VLBI maps of the active nucleus 3C 120.

• SUVANNABHUMI
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• v.12 no.1
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• pp.111-130
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• 2020

This paper introduces the different Southeast Asian Studies academic programs of three universities in northeast Asia namely: Peking University (China); Tokyo University of Foreign Studies (Japan); and Busan University of Foreign Studies (Korea). This study mainly focuses on the Philippines as part of Southeast Asian studies program in the said universities. The researcher utilized archival work related to the Southeast Asian studies programs of each university. The study also examined the curriculum of the program, background of faculty, and motivations of students in studying Southeast Asian studies by conducting interviews and surveys. Strength, Weakness, Opportunities, Threats (SWOT) Analysis was employed by the researcher in analyzing the data from the different universities. Finally, in mapping out the teaching of Filipino language and Philippine-related subjects, this paper argued that Northeast Asian universities established a Southeast Asian Studies focused on Philippines because of various socio-economic-political factors, and not only because of the Filipino diaspora in the region.

• The Bulletin of The Korean Astronomical Society
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• v.45 no.1
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• pp.62.2-62.2
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• 2020

Globular clusters(GCs) are found not only around galaxies (galaxy GCs), but also between galaxies in galaxy clusters (intracluster GCs; ICGCs). The ICGCs, which are not bound to any of cluster member galaxies, are governed by the galaxy clutster potential. ICGCs have been detected in the wide field of Virgo and Fornax galaxy clusters. However, previous surveys covered only a small fraction of Coma and Perseus. In this study we present a wide field survey of these two galaxy clusters, using Subaru Hyper Suprime-Cam(HSC) archival images, covering a circular field with diameter of ~1.8 deg. We select ICGC candidates, by masking the images of bright galaxies and choosing point sources in the remaining area. We find thousands of ICGCs in each galaxy cluster. These ICGCs show a bimodal color distribution, which is dominated by blue GCs. We investigate spatial distributions and radial number density profiles of the blue and red ICGCs in each galaxy cluster. Implications of the results will be discussed.

• The Bulletin of The Korean Astronomical Society
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• v.41 no.1
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• pp.70.2-70.2
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• 2016

Star formation in galaxies is one of the key factors in galaxy evolution. It is believed that star formation is triggered and enhanced by mergers among galaxies or secular evolution. However, how much these two mechanisms contribute on star formation is not well known yet. Recently, many other studies show observational evidences of faint merger features(tidal tails, stellar streams) around nearby galaxies with deep optical imaging. This study aims to investigate the fraction of star forming galaxies exhibiting faint features to total galaxies. We are analyzing samples of 76 star forming galaxies (NUV < -18) to find merger features from stacked B, R band frames taken at Maidanak 1.5m, McDonald 2.1m telescope and g, r frames from Canada-France-Hawaii Telescope (CFHT) MegaCam archival data. With the fraction, we can expect to know the contribution of mergers on star formation to galaxies.

• The Korean Journal of Archival Studies
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• no.63
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• pp.167-225
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• 2020

The author conducted a records research named 'daily life and records.' The purpose of the research was to find an archive, if possible, that would be effective in promoting exchange and cooperation among people in their daily lives, and to distinguish what type of archive it would be, as well as how to let it naturally take place in their ordinary lives. For 4 months (August-December 2019) with 100 college students in their 20s, trial and error were repeated. There was no separate laboratory for the research, and it used regular school hours at universities. Although it is true that there was a control through power by the college system, the plot was centered on the sunshine policy. To human being there is a voluntary and positive attitude. If anyone begins to take this attitude it is difficult to stop such action. Through emotional support, this voluntary action was encouraged to take root. The experiment was an attempt to doubt the obvious, and to search for something new. From afar, this may seem irrelevant to archives. However, for the author who is a professional archivist, it was a time of records through control by Records principles. By organizing into a form of story, its archival implications are observed.

• Journal of Korean Society of Archives and Records Management
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• v.24 no.1
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• pp.111-136
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• 2024

This study aims to identify the current status of the village citizen archivist training program (hereinafter "training program") and propose a competency-based training program operational model to improve it. With the steadily increasing number of training programs, revitalizing programs and systemizing operations become imperative. This study focuses on achieving the program's goals, the competence of village citizen archivists, and the continuity of training programs and archiving activities. To this end, the meaning and role of village citizen archivists were investigated through domestic and international literature. Moreover, the current status of training programs from 2015 to 2023 was identified, and the implications of literature reviews and case studies were verified through interviews with the program educators. The implications of the interview were summarized as the program operational plan for each goal, the competence of village citizen archivists, and the development plan, thereby being reflected in the operational model. The competency-based education program operational model was proposed to incorporate a model structure, design principles, curricular modules for each goal, and considerations for each stage of education program operation.

• The Korean Journal of Archival Studies
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• no.16
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• pp.257-302
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• 2007

The use of records has been regarded as the ultimate goal of preserving records, and reference services are considered key tasks in records management. Particularly in Korea where the importance of archives and records management is not recognized sufficiently, we need to help the public recognize the importance of institutions, managing archives, and archives kept in the archives, and create new uses. In order for archives to notify archives, institutions and managing archives to potential users, they can use publications, exhibitions and education programs. In foreign countries, services such as public programs and outreach services have already been being executed by archives in order to publicize the archives actively to the public, and various supports are provided so that people can use archives in educational activities. What is more, publishing and exhibition programs are also linked to education, which can increase the use of archives and promote archives culture. Thus, archives play important cultural and educational roles. As archives' roles are being expanded and local archives are being established compulsorily in Korea, archives should play their roles not just as administrative agencies collecting official documents but also as cultural and educational institutions providing various forms of information and education. Creating new demands for important archives by notifying such archives through public programs approaching users, they should find ways for laying the ground for their existence. The objectives of this study are to look for the method of public program operation suitable for the Korean situation, to define abilities and roles required to archives as program planners, and ultimately to increase the use of archives and contribute to the settlement of archives culture.

• Journal of Korean Society of Archives and Records Management
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• v.10 no.1
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• pp.141-167
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• 2010

The goal of this study is to suggest a scheme to vitalize the National Archives of Korea's education programs for children. For this we researched the cases in Korea and abroad operating education programs for children actively. Through analysis we suggested a course of improvement to vitalize the National Archives of Korea's education programs, policy, organization, staff for children. For an area of policy we suggested a stipulation of education program and an exclusive organization and staff placement for an area of organization and staff, an education program which is different from other cultural organization for a program.

• The Bulletin of The Korean Astronomical Society
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• v.37 no.1
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• pp.33.1-33.1
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• 2012

We investigate the disk-jet connection of Young Radio Galaxies (YRGs) by comparing emission-line properties with radio luminosity and jet size. By combining new optical spectra for 21 objects with SDSS archival data for 15 objects, we selected a sample of 36 low-redshift YRGs at z < 0.4. We find that YRGs are classified in high- and low-excitation galaxies based on the relative strength of high-to-low excitation line strengths, suggesting that there are two populations in YRGs as similarly found in large radio galaxies, i.e., FRIs and FRIIs. High-excitation galaxies (HEGs) have higher emission line luminosities than low-excitation galaxies (LEGs) at fixed black hole mass and radio luminosity, suggesting that the Eddington ratio is higher in HEGs than in LEGs and that for given radio activity HEGs have higher accretion activity than LEGs. The difference between HEGs and LEGs is probably due to either mass accretion rate or radiative efficiency.

• Journal of Korean Society of Archives and Records Management
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• v.17 no.4
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• pp.51-86
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• 2017

This study aimed to examine conceptual discussions in transcription programs based on citizens' contribution and to discuss the operation and implications of the transcription program by investigating cases on transcribing records held in overseas archival institutions. With regard to conceptual discussions, the study identified the characteristics and significance of the transcription programs predicated on the notions of citizen archivists, participatory archives, and crowdsourcing. For case analysis, the study selected five transcription programs in the United States, the United Kingdom, and Australia, which are known to be managed successfully. The analysis was conducted following six criteria, including institution and goals, records for transcription, management of participation, infrastructure, policies and guidelines, and evaluation. The transcription programs were differentiated from community archives based on self-directed participation as the programs had a specific goal to improve access to historical records moderated by institutions. Therefore, it is necessary that strategies be built to attract the sustainable participation of the public. In this respect, the study made the following suggestions to domestic services similar to the cases. The purpose of a program needs to be described, and the topics, creators, and record types that could induce interests have to be considered when selecting transcription records. It is also important that a partnership is made with a small number of participants who made a significant contribution to the program and to provide interface and tasks for the transcription, which meet the participants' needs. In addition, it is necessary that simple and effective guidelines for transcription and policies be provided for use in transcription results, and that visible participants' contribution is recognized by applying the transcription results actively to search and access records.