• The Journal of The Korea Institute of Intelligent Transport Systems
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• v.22 no.2
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• pp.15-28
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• 2023

Boundary Station is an evaluation index that was not reflected in the Seoul Metropolitan Urban Railroad Connected Eare Allocation. Boundary station is a station located at the boundary point of two transportation agencies sharing the same route, and track operation methods are divided into business management and maintenance management. Until now, the Connected Fare Allocation has evaluated the boundary stations from the perspective of business management. Meanwhile, the integrated public transportation fee system requires the need to interpret the boundary stations from the point of view of maintenance management at the developmental level. This study was prepared a measure to quantitatively analyze changes in income with the introduction of maintenance methods in mind. The Change in the income of operation agency evaluated based on the daily transportation card data for the boundary stations of the four Seoul Transportation Corporation and KORAIL sections. This study is meaningful as a basic research for an analytical judgment that evaluates and allocates changes in transportation income of Seoul Metropolitan Urban Railroad in the future.

• Journal of the Korean Society for Nondestructive Testing
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• v.17 no.4
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• pp.237-247
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• 1997

A geometrical inverse heat conduction problem is solved for the infrared scanning cavity detection by the boundary element method using minimal energy technique. By minimizing the kinetic energy of temperature field, boundary element equations are converted to the quadratic programming problem. A hypothetical inner boundary is defined such that the actual cavity is located interior to the domain. Temperatures at hypothetical inner boundary are determined to meet the constraints of mea- surement error of surface temperature obtained by infrared scanning, and then boundary element analysis is peformed for the position of an unknown boundary (cavity). Cavity detection algorithm is provided, and the effects of minimal energy technique on the inverse solution method are investigated by means of numerical analysis.

• The Journal of Korean Institute of Communications and Information Sciences
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• v.27 no.8A
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• pp.829-835
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• 2002

When finite length image signal is decomposed into M-band synthesized using M-band orthogonal wavelet transform, the boundary signal of image are not reconstructed perfectly. for boundary signals to be reconstructed perfectly, different type filter bank or technique is applied to them when the dimension of analysed is proposed. It can be designed using the singular value decomposition of boundary perfect reconstruction matrix which is obtained from paraunitary matrix which is obtained from paraunitary matrix. And it is also discussed to design the boundary filter bank for improving the coding performance when it is applied to subband coder. The proposed boundary filter bank shows 7% gains in PSNR compared with reflected method.

• KAPE Magazine
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• s.176
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• pp.4-5
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• 2011

정부가 구제역 발생 이후의 대한민국 축산업 재건을 위해 대대적인 리모델링 착수에 들어갔다. 방향은 ${\blacktriangle}$방역메뉴얼 개편 ${\blacktriangle}$조직정비 ${\blacktriangle}$축산업 선진화 등 크게 3가지이다. 이와 함께 정부는 지난 3월 24일부로 구제역이 진정돼 안정적인 통제가 가능하다는 판단에 따라 구제역 경보단계를 '심각'에서 '경계'로 한 단계 낮추기로 했다. 구제역 발생에 따른 위기 경보 단계는 '관심(주변국 발생)${\rightarrow}$주의(국내 발생)${\rightarrow}$경계(확산)${\rightarrow}$심각(3개 시 도)' 등 총 4단계로 구성돼 있다.

• Journal of Science and Technology Studies
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• v.18 no.2
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• pp.307-342
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• 2018

This article is to discuss about a debate on controlling and handling rights of diagnostic instruments for the outbreak of Foot-and-Mouth Disease(FMD) in South Korea between 2010 and 2011. The epidemic of FMD caused catastrophic shockwave to the whole Korean society and there was fierce debate what was the best diagnostic tool for the disease and who owned the controlling power. The central government insisted to have the power of controlling the diagnostic tool to maintain the nation-centered disease control while local governments and civil organisations attempted to take over the controlling power of the diagnostic tools. In this article the concept of boundary objects which was suggested by an American STS academic, Susan Leigh Star and her colleagues. The boundary object could be the useful concept for capturing the whole process of constructing and imposing meanings and social orders in the diagnostic tool, called the portable antibody/antigen diagnostic kit. The constructing process of this boundary object must be understood with relation to boundary making activities between different social groups.

• Proceedings of the Korean Society of Fisheries Technology Conference
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• 2002.10a
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• pp.135-136
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• 2002

동해는 지중해적 성격을 지닌 북서태평양의 연해이면서도 깊이가 약 200m 이천에 불과한 말은 대(쓰시마)해협으로 인하여, 동해의 남서부 해역의 상층부를 통한 고온, 고염의 쓰시마 난류수가 유입되고 있다. 동해에서 일어나는 해양학적 현상들은 외양의 축소형태를 나태내고 있다. 즉, 동한 난류는 서안경계류의 특성을 나타내고 있고, 북쪽의 저온 저염수와 남쪽의 고온, 고염수와의 경계역에서는 극전선이 형성되고 있다(Choi et. al., 1995). (중략)

• Journal of the Computational Structural Engineering Institute of Korea
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• v.12 no.2
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• pp.223-231
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• 1999

본 연구는 복합하중을 받는 구조물에 있어서 구조물의 안정경계점을 계산하는 방법을 제시하고 있다. 여기에서는 우선 안정경계점에 놓여 있는 기지의 점에 대한 선형해를 일반역행열을 이용하여 선형 증분 평형방정식의 여해와 특이해의 선형결합으로 나타내었다. 다음으로 두 개의 하중계수를 구속하는 선형조건을 도입하고, 그 구속조건하에서 하중계수 비가 일정하게 되도록 반복계산을 수행하므로써, 안정경계점위의 다음 목표점이 얻어진다. 얻어진 이 점을 초기점으로 이용한다. 평형경로를 추적할 때, 본래의 두 개의 하중계수 문제는 하중계수의 비가 일정하다는 조건을 도입하여 단일 하중계수의 문제로 된다. 두 개의 예를 들어 수치해석을 행하였으며, 얻어진 결과로부터 본 연구에서 채택된 방법은 구조물의 경계안정점을 찾는 문제에 적합하며 더욱 개발할 여지가 있음을 보여주고 있다.

• Journal of the Korean Society of Marine Environment & Safety
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• v.14 no.2
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• pp.157-162
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• 2008

The ship's maneuverability is the important factor to avoid ship's collisions. The ship's maneuverability is usually measured in a deep water, and the turning ability is decreased and the course stability is improved in a shallow water. The variation of the turning ability could cause the risk of collision. In this paper, we proposes application technique of Variable Safe-Guard Ring to consider the shallow water effect and to be simple to estimate the grade of collision risk simultaneously. Through the mathematical simulation, the availability of new method was varified. Therefore this method is expected enough to support a maneuver for collision avoidance.

• Journal of the Korea Institute of Information and Communication Engineering
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• v.4 no.5
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• pp.997-1003
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• 2000

When finite length signal is the input of QMF banks which are composed of the M-band orthogonal wavelet filter, the boundaries of reconstructed signal are not reconstructed perfectly. For boundary signals to be reconstructed perfectly, different type filters or methods are applied to them. In this paper, the design method of boundary filters which can be reconstructed the boundary signal perfectly was proposed, in case the dimension of M-band decomposed signal is the same as that of input signal. The boundary filters were designed using the perfect reconstruction condition of paraunitary matrix. In an application of subband coding of still image, the proposed boundary filters achieve better PSNR about 5% in reconstructed image than reflected method at the same bit rate.

• The Sea:JOURNAL OF THE KOREAN SOCIETY OF OCEANOGRAPHY
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• v.17 no.4
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• pp.203-224
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• 2012

Definition of estuary and its administrative boundaries is needed for the practical management of estuarine environment. However, the majority of Korean estuaries are lack of scientific data required for defining the administrative boundaries. For this reason, a systematic way to set the boundaries has not been developed so far. This study proposed adaptive and comprehensive criteria in defining the boundary of an estuary based on the available data which includes physiochemical, geographical and topographical characteristics and regional data such as land uses and socio-economic conditions. An estuary boundary is defined with a sequential manner. First of all, according to the estuarine circulation pattern, 463 estuaries in Korea were classified into open estuaries and closed estuaries. Then an individual belonging to each type of estuary is defined an water zone boundary considering the physiochemical, geographical and topographical characteristics and land uses. Finally, a land zone boundary is set along the catchment. According to the proposed criteria, we have delineated 274 estuarine management zones in Korea on a trial basis and found that it was possible to set a boundary reasonably considering the difference of level of available data and regional characteristics in each estuary.