• Journal of the Korean Society for Library and Information Science
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• v.35 no.4
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• pp.217-238
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• 2001

As an exploratory study, the purpose of this study was twofold. First, to show the process for developing a pathfinder with for assessing how the end users analyze a pathfinder ("a usability test"). Second, to provide a pathfinder for fashion marketing fields. Organised especially for students of the Fashion Graduate School in Dongduk Women's University, this pathfinder included books, periodicals, Internet web sites, online stores, brands, and apparel organizations. Participants in the test evaluated the pathfinder with medium to high grade in terms of contents, classification, and quantity of resources. In particular, they acknowledged the usefulness of a pathfinder. The results could provide helpful guidelines for the design of pathfinders. In addition, this publication provides additional information that focuses on fashion marketing fields.

• The Bulletin of The Korean Astronomical Society
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• v.37 no.2
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• pp.234.2-234.2
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• 2012

As the accuracy in the measurement of cosmological parameters is ever-increasing in this era of precision cosmology, astrophysical constraints on high-redshift universe is also getting tighter. Three dimensional (3D) tomography of the high-redshift (z>~7) universe is expected to be made through the next-generation radio telescopes including various SKA pathfinders and SKA itself, which calls for extensive theoretical predictions. We present our new simulations of cosmic reionization covering the full dynamic range of radiation sources, and also the mock data for the (1) large-scale CMB polarization anisotropy for Planck mission, (2) small-scale, kinetic Sunyaev-Zel'dovich effect for South Pole Telescope project, and (3) 21-cm observations. We show that the new constraints on CMB from Planck will constrain the models of reionization significantly, which then should be tested by 3D tomography of high-redshift universe through the 21-cm observations by future radio telescopes.

• The Bulletin of The Korean Astronomical Society
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• v.44 no.2
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• pp.59.3-59.3
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• 2019

The last two decades have seen an immense growth in our understanding of the physics of the birth and evolution of our Universe. However there are still many unanswered questions, such as: what is the nature of the dark energy, which drives the acceleration of the expansion of the Universe? Is the acceleration driven by a cosmological constant, some dynamical dark energy, or a modification of the gravitational force law on large scales? The next generation of radio observatories will conduct large area radio continuum and HI intensity mapping surveys, and so will make possible new and complimentary tests of these fundamental questions. In this talk I present the design of these next generation of surveys, current forecasts for the effectiveness of these cosmological probes, and results from precursor experiments.

• Economic and Environmental Geology
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• v.9 no.3
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• pp.143-156
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• 1976

The Cretaceous metal ore deposits in the Gyeongsang basin of Gyeongsangbuk-do are characterized by the formation of metallogenic provinces which show zonal distribution pattern around Yeonil province where pneumatolytic type is dominated and hydrothermal type are distributed in the order of decreasing temperature type outward. Some Cretaceous granitic rocks include zoned alkali feldspars which reflect rapid variation of $H_2O$ during emplacement and crystallization of the water-saturated granitic magma. The ore deposits are considered to be originated from upward transportation of ore solution from the excess of water exhausted from uprising magma, which seems to be intimately related to the fact that the majority of the ore deposits in Daegu area are cummulated around the granites including zoned alkali feldspars. In order to collect geochemical data necessary for geochemical exploration in the study area, certain trace elements were chosen as pathfinders from monzonite and soil in the vicinity of Dalsung Tungsten Mine by studying the dispersion patterns of trace elements: Ba and Sr show trends to decrease toward ore deposit while Cu, Pb, and Mo increase. Around mining area there are distributed apparently Equisetum arvense Linne and Mentha sachinensis Kudo which may be used as index plants. In the viewpoint of geologic structure, the trends of the ore veins in contact aureole around the Palgongsan granite body correspond with the pre- and syn- plutonism joint pattern in hornfels in the area.

• Economic and Environmental Geology
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• v.21 no.4
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• pp.389-400
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• 1988

Minor elements such as Ag, As, Au, Bi, Cd, Cu, Co, Ni, Pb, Rb, Sb, Sr and Te were analyzed by atomic absorption spectrophotometry and induced coupled plasma spectrophotometry in order to investigate pathfinders for gold in quartz porphyry, granite porphyry and vein materials in Jeonjuil gold - silver mine, and in altered biotite granites and vein materials in Dukum gold - silver mine. In Dukum gold - silver mine, it is observed that Au contents have positive relation with As, Co, and Rb contents, but negative relation with Bi contents in altered biotite granites. Au contents have positive relation with Ag, As, Co and Te contents in vein materials. In Jeonjuil gold - silver mine, it is observed that Cd, Rb, Sr and Te are enriched near ore vein in quartz porphyry and granite porphyry. Au contents have positive relation with As, Cd, Cu, $Fe_2O_3$ and $K_2O$ in vein materials.

• The Bulletin of The Korean Astronomical Society
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• v.41 no.2
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• pp.62.2-62.2
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• 2016

We present a newly developed algorithm based on a Bayesian method for 2D tilted-ring analysis of disk galaxies which operates on velocity fields. Compared to the conventional ones based on a chi-squared minimisation procedure, this new Bayesian-based algorithm less suffers from local minima of the model parameters even with high multi-modality of their posterior distributions. Moreover, the Bayesian analysis implemented via Markov Chain Monte Carlo (MCMC) sampling only requires broad ranges of posterior distributions of the parameters, which makes the fitting procedure fully automated. This feature is essential for performing kinematic analysis of an unprecedented number of resolved galaxies from the upcoming Square Kilometre Array (SKA) pathfinders' galaxy surveys. A standalone code, the so-called '2D Bayesian Automated Tilted-ring fitter' (2DBAT) that implements the Bayesian fits of 2D tilted-ring models is developed for deriving rotation curves of galaxies that are at least marginally resolved (> 3 beams across the semi-major axis) and moderately inclined (20 < i < 70 degree). The main layout of 2DBAT and its performance test are discussed using sample galaxies from Australia Telescope Compact Array (ATCA) observations as well as artificial data cubes built based on representative rotation curves of intermediate-mass and massive spiral galaxies.

• Journal of Korean Library and Information Science Society
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• v.23
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• pp.253-284
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• 1995

The purpose of this paper is to analyse the current status of reference education and to suggest directions for reference education in America and in Korea. For this purpose, the historical developments of reference services, and the names, problems and changes of reference courses are studied. The findings of the study can be summarized as follows; 1. The names of reference courses are various. In America, On-Line Services or Information Services are used in general, but in Korea, Reference Services are widely used. 2. In America, some library schools have only subject literature courses including business, law, music, etc. instead of basic reference courses. 3. Only one reference course is given by most schools in America and in Korea. However, a few schools which have no graduate courses provide two reference courses in Korea. 4. Analysis of textbooks used in reference courses shows that Reference Research by Joon-Shik Park, Reference Services and Reference Sources by Ock-Soon Noh are used in general. In addition, Introduction to Reference Work by Katz is used. 5. Lecture methods are generally used in teaching reference courses, but reviews of reference materials in library, class presentation, and case study method are also used. It is desirable that role playing and pathfinders' used in U.S. are introduced to our schools. 6. Analysis of library user instruction courses in Korea shows that 7 of 11 universities have the courses,, only one university teaches library user instruction as a part of reference courses, 3 universities don't. 7. Analysis of opinions about the directions for reference education shows that changes of reference courses names, expansion of courses contents, emphasis on communication technique, changes of teaching methods, proper combination of theory vs. practice, an increase in electronic reference education and training of subject specialist are needed.