• The Transactions of The Korean Institute of Electrical Engineers
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• v.66 no.11
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• pp.1641-1646
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• 2017

This paper presents a fast method to identify an area of severity which is a network area leading to voltage sags at multiple sensitive load points, simultaneously. To assess voltage sag performance considering various sensitive loads, it is need to determine an area of severity for the load points. The area of severity can be calculated by overlapping areas of vulnerability for each sensitive load. However, as the number of sensitive loads increases, computational complexity and time for determining an area of severity are highly increased. In this paper, an efficient scheme based on line division is described. The proposed method is useful for identifying an area of severity and assessing voltage sag performance considering multiple loads together.

• SUVANNABHUMI
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• v.7 no.1
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• pp.77-88
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• 2015

This article will review the historical background of the development of area studies and the adoption of global studies in Japan. Global studies, which focuses on global issues such as migration, mainly developed in the United States and Europe, but more recently found home in universities in Japan. A characteristic of the development of global studies in Japan is that specialists in area studies have played an important role in institutionally establishing this new discipline. "Japanese area studies" has an affinity with the concepts of global studies contrary to the situation with area studies in the United States. Conventional academic societies based on area studies in Japan, however, have been forced to change as a result of globalization and the establishment of global studies in Japan. I would like to point out that there is some discrepancy between the scholarship boundaries and the actual research and educational program in area studies. I will also discuss how we should reconsider the concept of "area" by tackling global issues.

• Journal of Korea Multimedia Society
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• v.17 no.8
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• pp.915-922
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• 2014

We propose an adaptive zoom motion estimation method where a picture is divided into two areas based on the distance information with a depth camera : the one is object area and the other is background area. In the proposed method, the zoom motion is only applied to the object area except the background area. Further, the block size of motion estimation for the object area is set to smaller than that of background area. This adaptive zoom motion estimation method can be reduced at the complexity of motion estimation and can be improved at the motion estimation performance by reducing the block size of the object area in comparison with the conventional zoom motion estimation method. Based on the simulation results, the proposed method is compared with the conventional methods in terms of motion estimation accuracy and computational complexity.

• Journal of Environmental Impact Assessment
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• v.4 no.1
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• pp.47-57
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• 1995

This study analyzes the problems of environmental laws, development planning laws, Metropolitan Area Development Planning(MADP), and the level of environmental pollution at Pusan and Asan-Bay Metropolitan Area where MADP will be realized in the near future. In order to prevent the environmental pollution by realization of MADP, Environmental Impact Assessment Act and environmental impact assessment systems in Korea should be revised so as to reflect the followings. First, the impact of national landuse planning change on the environment should be considered at the beginning of environmental impact assessment procedures. Second, the overlapping and greater impact of many projects, whose part is the subject of environmental impact assessment, upon surrounding metropolitan area should be simultaneously evaluated and the environmental pollution protection and abatement alternatives must be made according to the above impact of the projects. Thirdly, total effluent regulation of water pollution, air pollution and solid wastes should be enforced based on the self-purification of the metropolitan area environment.

• Journal of the Korean Dietetic Association
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• v.7 no.1
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• pp.50-55
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• 2001

Running smoking, no-smoking area in restaurants(n=546) in 25 districts in Seoul area was surveyed and evaluated. No-smoking restaurants were evaluated as A(2.0 points). Restaurants running no-smoking area with guidance to the customers were evaluated as B(1.7 points), and those without guidance as C(1.4 points). In case of the distinction of smoking or no-smoking area are not clear, it was evaluated as D(1.1 points). Restaurants which are not running no-smoking area were scored E(0.8 points). Western style restaurants scored average of 1.55points, which was significantly higher than that of Korean, Chinese or Japanese style ones(average of 1.24~1.27 points). The highest mean score for restaurant 1.625 points in Songpa-gu(district).

• Journal of Korean Society of Transportation
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• v.8 no.2
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• pp.55-66
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• 1990

The research deals with the establishment of transportation areas in the metropolitan cities. The purpose is three-fold ; 1) to review the existing literature : 2) to analyze the commuting (work and school) pattern and interregional movement pattern of passengers and freights ; 3) to establish the metropolitan transportation area based on the above analyses. The transportation area is defined by the analysis of trip pattern to the center city of each metropolitan area. The detailed indices for establishment are selected by the rank-size and time-distance analyses. For the operational purpose, the study defines 3 different transportation areas as follows : the first transportation area means the directly effecting region of the center city ; the second means the region with many reverse trips and development potentials ; and the third means the indirectly effecting region. It can be concluded that the first transportation area includes 10 cities and 5 counties in Seoul metropol tan region, Yangdsan-Gun, Kimhae-Gun and Kimhae-Si in Busan, Dalsung-Gun, Chilgok-Gun and Kyungsan-Gun in Daegu, Hwasung-Gun and Raju-Gun in Kwangju, and Daeduk-Gun in Daejun. These results could be expected to have many implications for the establishment of area-wide public transportation network, the metropolitan transportation decision-making bodies and others.

• Journal of the Korean Data and Information Science Society
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• v.27 no.2
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• pp.531-538
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• 2016

In this paper we deal with the small area estimation for the case that the response variables take binary values. The mixed effects models have been extensively studied for the small area estimation, which treats the spatial effects as random effects. However, when the spatial information of each area is given specifically as coordinates it is popular to use the geographically weighted logistic regression to incorporate the spatial information by assuming that the regression parameters vary spatially across areas. In this paper, relaxing the linearity assumption and propose a geographically weighted kernel logistic regression for estimating small area proportions by using basic principle of kernel machine. Numerical studies have been carried out to compare the performance of proposed method with other methods in estimating small area proportion.

• Journal of Environmental Science International
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• v.11 no.1
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• pp.1-14
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• 2002

This study was conducted to compare protected areas of South and North Korea based on international conservation criteria and recommend new fundamental directions for nature conservation policy. International conservation criteria used by this research were the 1994 IUCN protected area categories, composed of 6 management categories. Despite a variety of types and names of protected areas created by different domestic legislations, South Korea was revealed to have only two types of protected areas, Category IV and V, indicating the significant lack of ecological diversity and representativeness in its protected area system. Shockingly, there are no national parks meeting IUCN criteria in South Korea. On the other hand, North Korea has three IUCN Categories of II, III, IV and thus more balanced and ecologically representative protected area network than South Korea. Especially, North Korea maintains 9 national parks to be officially recognized by IUCN and UN. However, both South and North Korea should make sincere effort to have new and well-designed protected area system including all IUCN Categories I -Ⅵ and particularly a minimum area in the stricter protected area categories.

• Journal of The Korean Society of Agricultural Engineers
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• v.58 no.6
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• pp.79-92
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• 2016

The objective of this study is to classify the types of rural areas (138 $si{\cdot}gun$) considering settlement environment by Decision Tree Method (CHAID). The CHAID method was used for decision tree algorithm and the seven dependant variables and 5 explanatory variables were selected, respectively. By decision tree method, rural areas were finally classified into six groups through three separate processes. City area, lower area in aging rate and higher area in farmland area ratio was analyzed to be relatively rich rather than other area in the case of settlement environment index. In the future, this study will be able to utilize as a reference to the planning of rural development projects.

• Journal of Korean Library and Information Science Society
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• v.16
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• pp.99-128
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• 1989

The purpose of this study is to examine the problems of the each cataloging rules about the physical description area that generated the greatest controversy in the cataloging of microcomputer software, and to suggest solutions of these problems. The results of the study can be summarized as follows: 1. Because the physical description area of materials is to identify the physical attributes of the carrier, file description might better described in the material specific details area. 2. Integrated software that related file is linked together need to be used terms that represented any type of software 3. It is desirable that the term 'computer' is to be used as a modifier to devide the carrier of microcomputer and other non book materials. 4. System requirements would better described in a note area rather than physical, description area. 5. It is desirable that other physical details such as recording density, tracks, etc., is to describe in the physical description area, since such information is to represent specifics of the carrier.