• Journal of the Korean Association of Geographic Information Studies
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• 제8권2호
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• pp.1-9
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• 2005

This study was performed to analyze time series landuse pattern of urban areas and the change of the areas by using remotely sensed multiple sensors. The results were as follows. First, according to the result of time series analysis, most agricultural land has been changed into built-up areas by development work such as the land development or land readjustment project, arrangement of science parks or military facilities, and location of public establishment like government buildings. Second, if the expansion of built-up areas maintains the present scale and speed, it seems that a lot of parts of land would be changed into built-up areas, especially centering around agricultural land, so it is necessary to establish the plan for urban space. Third, I have synthetically collected the data of the project of urban development and systematically monitored the process of in expansion the built-up areas up to now (from the past). I hereby could lay the foundation that makes us scientifically forecast the direction of expansion in the built-up areas by the urban development in the future.

• Journal of the Korean Society of Surveying, Geodesy, Photogrammetry and Cartography
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• 제37권6호
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• pp.579-586
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• 2019

The national base map of Korea has become more useful as the spatial information industry has developed rapidly. Beyond the simple application of the past paper map era, the role as important spatial information in the smart city and digital twin era is required with the IT (Information Technology) revolution. Therefore, the concepts of seamless, multi scale, object-oriented, customized production and real-time updating have emerged, and innovations in the distribution process through the internet are also taking place. Although the concept and definition in the law that is corresponds to the status of the national base map must be supported, the concept and definition of the paper map introduced from the surveying law in 1980 still exist. The definition of the national base map cannot meet current technological developments and social needs and does not reflect the perceptions of the majority of the people as well as the practical capacity of government organizations that manage it. Therefore, it is necessary to establish the concept of national base map in accordance with the current situation and to define it in the law. In this study, the concept of national base map was established and defined by comprehensive analysis of the development process of the national base map, the changes in the times and cases of the United States, the United Kingdom and Japan.

• Journal of the Korean Institute of Landscape Architecture
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• 제34권4호
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• pp.69-83
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• 2006

Nature rehabilitation has become a major theme in river management in South Korea. An analysis and evaluation of the landscape is a crucial step to select the suitable tracts for developing or conserving land use in the process of landscape planning. The purpose of this paper is to establish a hierarchical procedure for the setting of the landscape units on the various scales at which field biologists performed their observations and to select the preserves through by a suitability model for synthesizing the ecological empirical, and biophysical data. An evaluation process needs to be performed according to the landscape scales: site, local, and regional scales, at which the environmental data were collected, analyzed, and synthesized. Introducing of three level scales was crucially necessary for evaluating the various multi level ecological data for zoning of preserves in river corridors. The evaluation level at different scales are hierarchically established into three phases. The first evaluation phase can be performed by the long length units defined by the ranges of stream widths at regional scale. Secondly, each of these long units can be divided into two or more segments according to its landscape homogeneity at local level. Finally the segments at the last phase can be designated according to the location of the reservoir weirs and bridges at site level. The conceptual model components are adopted for collecting, evaluating, and interpreting the biological and abiotic data at site level. Three preserves are selected, having high potentials for being intensely managed as the Ecological Education Areas in the river. Despite a lot of assumption the results are expected to facilitate discussion and decision making about which frameworks of evaluation are desirable and adaptable for integrating the ecological data into the rehabilitation design process in South Korea.

• Journal of the Institute of Electronics Engineers of Korea SP
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• 제37권2호
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• pp.50-59
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• 2000

In this paper, a new preprocessing method is proposed to speedup the watershed-based image segmentation In the proposed method, the gradient correction values of ramp edges are calculated from the positions and width of the ramp edges using Laplacian operator, and then, unlike the conventional method in which the monoscale or multi scale gradient image is directly used as a reference iImage, the reference image is obtained by adding the threshold value to each position of the ramp edges in the monoscale gradient image And the marker image is reconstructed on the reference image by erosion By preprocessing the image for the watershed transformation in such a manner, we can reduce the oversegmentations far more than those of applying the conventional morphological filter to the simple monoscale or multiscale gradient-based reference image Thus, we can reduce the total image segmentation time by reducing the time of postprocessing of region merging, which consumes most of the processing time In the watershed-based image segmentation, Experimental results indicate that the proposed method can speedup the total image segmentation about twice than those of the conventional methods, without the loss of ramp edges and principal edges around the dense-edge region.

• Journal of the Korean BIBLIA Society for library and Information Science
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• 제2권1호
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• pp.236-265
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• 1974

The study is to trace the origin of the Hongmunkwan ana discuss its development and roles assigned in each succeeding stages of the history. The Hongmunkwan lived a long life through Koryo and Yi dynasties. It was a multi-functioned institution designed as a royal library, an educational institution, and a political reference center. Prior to the Hongmunkwan, there were some established institution with similar functions to its ones during the Three-Kingdom Era. One of such kind was the Sungmunkwan(崇文館), which was eventually renamed the Hongmunkwan by King Songjong(成宗) of Koryo in 995, and a distinguished scholar-minister was appointed at the position of directorship for management of the now status-raised institution where state documents and books were housed. The Hongmunkwan experienced some reforms during its long life. In 1420, King Sejong(世宗) of Yi Dynasty founded the Jipyonjon(集賢殿) within the royal palace in place of the Hongmunkwan. The Jipyonjon was an innovated Hongmunkwan where many scriptures were stored and distinguished scholars and officials studied on them, sometimes delivering lectures to the king. King Sejo(世祖) abolished the Jipyonjon in his second year(1456) and reestablished the Hongmunkwan designed as a royal library in place of the former in his ninth year. King Songjong(成宗) in his 10th year (1479) of the reign, reformed the Yemunkwan(藝文館), which existed from the beginning of the Yi dynasty, by extending its functions and afterwards absorbed it into the Hongmunkwan together with the functions of the former Jibhyonjon which were included in the Yemunkwan. He founded another Yemunkwan which had the roles of drafings and descriptions of royal decrees. In the 10th year (1504) of Yonsankun(燕山君), the Hongmunkwan was abolished and instead of it the Jindokchong(進讀廳) was founded with less authority and functions. But shortly after that, King Jungjong(中宗) refounded the Hongmunkwan with the same scale, same authority and same functions as the former, one. As the Hongmunkwan also had a function of the royal library it collected and kept numerous books and writings in it. Some books and writings of the Hongmunkwan were composed of those which had been transmitted from the Koryo Dynasty and the others were composed of those which had been collected in the country or purchased by the trade with China in the Yi dynasty. Also newly-compiled important books in the country were reprinted and one of them were send to the Hongmunkwan. In the 8th year (1784) of King Jongjo(正祖), the history of the Hongmunkwan, entitled the Hongmunkwanji(弘文館志), was written and editioned by the royal decree and it was reeditioned the 7th year (1870) of King Kojong(高宗). The Hongmunkwan was absorbed into the Kyujanggak(奎章閣) in 1907.

• Journal of Mechanical Science and Technology
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• 제20권12호
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• pp.2292-2314
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• 2006

Efficient numerical method is developed for the prediction of aerodynamic noise generation and propagation in low Mach number flows such as aeolian tone noise. The proposed numerical method is based on acoustic/viscous splitting techniques of which acoustic solvers use simplified linearised Euler equations, full linearised Euler equations and nonlinear perturbation equations as acoustic governing equations. All of acoustic equations are forced with immersed surface dipole model which is developed for the efficient computation of aerodynamic noise generation and propagation in low Mach number flows in which dipole source, originating from unsteady pressure fluctuation on a solid surface, is known to be more efficient than quadrupole sources. Multi-scale overset grid technique is also utilized to resolve the complex geometries. Initially, aeolian tone from single cylinder is considered to examine the effects that the immersed surface dipole models combined with the different acoustic governing equations have on the overall accuracy of the method. Then, the current numerical method is applied to the simulation of the aeolian tones from twin cylinders aligned perpendicularly to the mean flow and separated 3 diameters between their centers. In this configuration, symmetric vortices are shed from twin cylinders, which leads to the anti-phase of the lift dipoles and the in-phase of the drag dipoles. Due to these phase differences, the directivity of the fluctuating pressure from the lift dipoles shows the comparable magnitude with that from the drag dipoles at 10 diameters apart from the origin. However, the directivity at 100 diameters shows that the lift-dipole originated noise has larger magnitude than, but still comparable to, that of the drag-dipole one. Comparison of the numerical results with and without mean flow effects on the acoustic wave emphasizes the effects of the sheared background flows around the cylinders on the propagating acoustic waves, which is not generally considered by the classic acoustic analogy methods. Through the comparison of the results using the immersed surface dipole models with those using point sources, it is demonstrated that the current methods can allow for the complex interactions between the acoustic wave and the solid wall and the effects of the mean flow on the acoustic waves.

• The Journal of Engineering Geology
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• 제22권1호
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• pp.1-13
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• 2012

The purpose of this work is to gain a better understanding of the interrelationships between geological structures and slope failure in sedimentary rocks. In the studied slopes, construction-related slope failure could only be observed on the south-dipping slopes. This indicates that slope stability may be dependent on the angular relationships between the dip direction of bedding and the orientation of the slope. Slope failure continued, post-construction, around large fault zones in the studied outcrop; these fault damage zones are, however, not easily recognized in the field. Here we suggest a new method that uses accumulated fracture density to precisely identify fault damage zones. Multiple-faced slopes are now increasingly being exposed during large-scale construction projects in South Korea. This multiple-faced slope analysis indicates that the stability of a slope should be evaluated by identifying domains, through the analysis of possible slopes and their angular relationships with bedding and other discontinuities, prior to construction. Therefore, careful consideration of geological structures such as bedding and other discontinuities, and their angular relationships during the design of cuttings through sedimentary rocks, will increase the efficiency of construction and enable the safe construction of more stable slopes that will retain their stability after construction.

• Journal of Internet Computing and Services
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• 제17권4호
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• pp.115-125
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• 2016

Recently, many attentions have been paid to conducting convergence research across diverse disciplines. Along with this convergence era, an IT-based multi-disciplinary convergence project, called EDISON (EDucation-research Integrated Simulation On the Net), has been launched to support the studies of researchers engaged in several computational science and engineering (CSE) fields and to boost learning motivations of CSE students. Since 2011, we have been successfully carrying out the EDISON project. EDISON as a cyber-learning platform enables CSE researchers to share their own high-performance computing (HPC) simulation softwares developed to solve their research problems accompanying large-scale computation and I/O and users to run the softwares with little constraints on the web. Also, the EDISON platform has been utilized as lecture material by many universities in Korea. This article introduces the construction and service statistics of this EDISON platform. Specifically, we explicate several distinctions between EDISON and existing other HPC service platforms and discuss a three-layered technical architecture of the EDISON platform. We then present the up-to-date service statistics of EDISON over the past four years. Finally, we conclude this article and describe future plans.

• Analytical Science and Technology
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• 제24권6호
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• pp.510-518
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• 2011

Recent developments and improvements of multiple technological elements including mass spectrometry (MS) instrument, multi-dimensional chromatographic separation, and software tools processing MS data resulted in benefits of large scale proteomics analysis. However, its throughput is limited by the speed and reproducibility of the protein digestion process. In this study, we demonstrated a new method for rapid proteolytic digestion of proteins using acoustic technology. Tryptic digests of BSA prepared at various conditions by super acoustic for optimization time and intensity were analyzed by LC-MS/MS showed higher sequence coverage in compared with traditional 16 hrs digestion method. The method was applied successfully for complex proteins of a breast cancer cells at 30 min of digestion at intensity 2. This new application reduces time-consuming of sample preparation with better efficiency, even with large amount of proteins, and increases high-throughput process in sample preparation state.

• Journal of Embryo Transfer
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• 제25권1호
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• pp.43-50
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• 2010

The specimens from 32 aborted fetus and 274 aborted cows were collected in 168 farms of Chonnam province from 2005 to 2008 and were tested the brucellosis. The results obtained are summarized as follows. In the 32 aborted fetus, bovine brucellosis was detected in 12 heads (37.5%), bovine viral diarrhea-mucosal disease was detected in 7 heads (19%), ainovirus infection was detected in 1 head (3.1%), and multi-infection of BVD and brucellosis was not detected, respectively. In the 306 cases of aborted fetus and cows, bovine brucellosis was detected in 44 heads (14%). Status of abortion were confirmed in 63 farms (38%) out of 168 farms from June to August. From the point of raising scale, studies found that 128 farms (76%) out of all raised under 20 heads. The incidence of abortion by brucellosis was mainly showed in 30 heads (68.1%) about 151~250 days of gestation. In the result of the 18 farms survey, the causes of infections were detected movement of infected cattle in 5 farms (28%), unknown cause in 12 farms (67%), and recurrence in 1 farm (5%). The results of this study suggest to take an advantage of the prevention and fundamental research for bovine brucellosis in Chonnam province.