• Proceedings of the Korean Institute of Industrial Safety Conference
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• 1997.11a
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• pp.229-234
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• 1997

밀폐공간내에서 일어나는 자연대류 열전달은 태양열 집열판, 연료탱크, 원자로의 핵반응로, 초전도 자성체의 냉각 및 건물이나 방의 효율적인 열설계, 화재시의 안전대책등 공업적으로 그 응용성이 매우 광범위하고 다양하게 생활주변에서 흔히 볼 수 있다. 밀폐공간내에 경계층 유동이 존재할 경우, 이 경계층 흐름은 일반적으로 외부유동에서의 경계층 유동과는 달리 코어영역(Core region)에서의 흐름과 서로 밀접한 관계가 있다. (중략)

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• 2003.10a
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• pp.453-456
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• 2003

Spatial database systems achieve filtering steps with MBR(Minimum founding Rectangle) for efficient query processing, and then carry out refinement steps for candidate objects. While most operations require fast execution of filtering, it is necessary to increase the filtering rates and reduce the number of refinement steps in the low computing powered devices. The compact representation method is also needed in the mobile devices with low storage capacity. The paper proposes various approximation methods for efficient spatial operations in the multiplatform environments. This paper also designs a compression technique for MBR, which occupies almost 80% of index data in the two dimensional case. We also analyze the advantages and drawbacks of each method in terms of space utilization, filtering efficiency and speed.

• Journal of Korean Association for Spatial Structures
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• v.6 no.2 s.20
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• pp.13-19
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• 2006

• Journal of Korean Society for Geospatial Information Science
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• v.23 no.2
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• pp.11-16
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• 2015

In general, problems of delimitating trading area are that it takes much efforts depending on regions and the results are not scientific due to agencies' own rules and criteria. Especially, areas like Hongik University Station, where countless stores are opening and closing simultaneously, the field survey needs even more time and expenses. Despite of its drawbacks, it has been considered that the field survey is the most credible method in delimitating trading area. The purpose of this study, therefore, is reducing the field survey when agencies delimitate trade area by maximizing use of previously built GIS database and utilizing spatial analysis. Publicly notified individual land value and floating population of Gwanak-gu were utilized to delimitate trading areas. For an evaluation method, the study results were compared to other trading area boundaries.

• Journal of the Korean Geographical Society
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• v.42 no.5
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• pp.710-727
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• 2007

This paper suggests an inquiry into the characteristics and implications of urbanscapes produced by Internet cafes, widely called PC Bangs in Korea, and their effects on the motions and boundaries of human bodies as cyborgs which exist in between actual and virtual spaces or between human and machine spaces in PC Bangs. The paper, which is organised into two main sections, first investigates the streetscapes of PC Bangs as electronic architectural spaces and suggests the urban electronic space of PC Bangs in terms of hypertext space. Then, it looks at the effects of PC Bangs on human bodies which exist as human-machine hybrids or cyborgs in PC Bangs. The paradoxical socio-spatial characteristics of PC Bangs as third, liminal or hybrid spaces between actual and virtual spaces or between human and machine spaces can be explained as follows. Firstly, there appear both nomadic and sedentary landscapes in that people in PC Bangs move in virtual spaces on the one hand, and are static in actual spaces on the other hand. Secondly, both open and closed spaces are shaped in that although PC Bangs act as open or public electronic spaces, they involve invisible social boundaries, forming the gendered space of masculinism. Thirdly, the boundaries of the human body are extended and are shrunk at the same time in that while the sensory boundaries of the body in PC Bangs are extended through electronic networks, its social boundaries are shrunk through the imaginary space of solipsism. Thus and finally, PC Bangs can be characterised not only as social spaces entailing embodied and gendered landscapes, but also as non-places involving the cyborg landscapes of human-machine connections.

• Journal of Cadastre & Land InformatiX
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• v.50 no.2
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• pp.117-132
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• 2020

The study studied ways to improve the adjustment of the cadastral reform project after analyzing and evaluating the method of determining the boundaries and the overall status of the adjustment, focusing on cases of complaints in the business district in Sejong City, where the re-investigation project was completed. Measures to improve the adjustment amount of the cadastral reform project were largely divided into boundary adjustment and improvement measures according to the scope of area allowance and institutional improvement. According to an analysis of the status of boundary adjustment in Sejong City, the boundary of the cadastral reform project was being adjusted in various ways, and among them, it was found that it is simple to adjust, to formalize parcels, and that many adjustments are being made centering on resolving blind areas by establishing new roads. When setting such a boundary, it is necessary to establish an efficient and reasonable boundary by actively encouraging sufficient consultation with owners and an adjustment boundary that reflects the personal will of landowners to minimize disputes over the adjustment amount. In terms of improvement measures based on the area limit, it is necessary to accurately record and preserve the results of the cadastral resurvey in numerical data and to ease or exempt the adjustment amount if it is within the area permissible scope of the Spatial Data Management Act when calculating the adjustment amount. Finally, in relation to the adjustment, it was judged that it would be necessary to provide long-term low-interest loans to their own land to landowners, and that it would be necessary to calculate the adjustment through appraisal calculated by third parties fairly and objectively based on value judgment.

• Transactions of the Korean Society of Mechanical Engineers
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• v.14 no.5
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• pp.1272-1281
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• 1990

A numerical study to predict the contamination behavior in a room being contaminated has been performed. The room with one inlet and three exits, which maintained same pressure at the ceiling, has been chosen as test model. Six sets of calculation have been performed, for one, two or three contamination sources of 1*10$^{-4}$ kg$_{c}$/s strength at two different velocities(0.2m/s, 20m/s). Numerical results show that the number the contamination concentration near the first source increased by every 20%-30% of the maximum concentration for each increase of the contamination source.e.

• Proceedings of the Korean Association of Geographic Inforamtion Studies Conference
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• 2004.03a
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• pp.529-534
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• 2004

고해상도 위성영상을 이용하여 수치지도를 제작함에 있어 가장 큰 문제점은 레스터 자료인 위성영상에서 경계검출을 통해 벡터자료의 형태로 제작하는 어려움이 있다. 본 연구에서는 경계검출을 통하여 위성영상에서 지형의 경계를 검출해내고, 이를 스크린 디지 타이징 기법을 적용하여 벡터라이징 한 후 나타난 결과를 국토지리정보원의 수치지도와 비교하여 정확도를 비교ㆍ평가하였다. 대상 범위는 대전광역시 유성구 가정동 일부지역을 IKONOS로 촬영된 공간해상도 1m의 위성영상을 사용하였다. 위성영상의 전처리는 기하보정과 정사보정을 거친 후 영상강조를 하였고, 여러 가지의 필터링을 적용하여 경계검출을 수행하였다. 경계검출 방법 중에 하나인 Sobel 연산자를 적용한 후 축척 1:5,000 수치지도와의 중첩을 통하여 표준편차(Root Mean Square Error : RMSE)를 산출하여 비교ㆍ분석하였다. 그리고 스크린 디지타이징 기법을 적용하여 추출한 벡터자료를 건물, 도로 및 임야로 분류하여 수치지도와 중첩하여 정확도를 분석하였다. 그 결과 건물과 도로의 경우에는 공공측량 작업규정에서 정하고 있는 축척 1:5,000의 평면위치 허용오차 기준을 만족하고 있지만, 임야의 경우는 축척 1:10,000 이상의 허용오차기준에 만족되고 있음을 알 수 있었다.

• Journal of Korean Society for Geospatial Information Science
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• v.14 no.3 s.37
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• pp.3-11
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• 2006

The need for edge detection about topography data from the high resolution satellite imagery is happening with increasing frequency according to many people utilize the its imagery as various fields recently. Many experts is recognizing of other GIS will make use of the road detection from the high resolution satellite imagery, including ITS (Intelligent Transportation Systems) and urban planning. This paper is comparative analysis of LPF (Low Pass Filtering) and HPF (High Pass Filtering) for roads edge detection from high resolution satellite imagery. As a result, LPF and HPF can be highlight selective pixels at edge area about input data. In case or applying to other techniques such as LPF for the same purpose, they aye more effective for wide road width which often cause the slight distortion of boundary or overall change of brightness values on the whole Image. Whereas, HPF has ability to enhance selectively detailed components in a target image.

• (The)Study of the Eastern Classic
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• no.62
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• pp.209-229
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• 2016

This thesis is to discover the meanings of boundary through East Asian thought so as to make rooms for discoursing on it. First of all people have their own boundaries of 'Me', and they make others as persons or objects in their thoughts. Originally boundary has represented nation's frontier, and it indicated the worlds of space in Buddhism of East Asian culture. It is represented by loka or visaya in Sanskrit and region, dominion, boundary, border in English, which means the worlds that people would fancy in their minds over domains of politics, societies, culture, arts ect, not to be simple. Accordingly we must not approach to its meaning simply like 'beyond border'. There are many boundaries, which are similar to the sublime, for us to arrive in our lives. Spiritually there are also many boundaries(regions) that are made by our desires, wills and concepts. In a while there are limit or problem in our recognizing things, for example, of human's five senses that would be, to an extent connected with Buddhistic understanding of boundaries. Boundaries resulted from partiality in understanding of objects must be got rid of eventually. In regard of these matters, this thesis discusses the meanings of boundary, those that are inevitably made by human's consciousness, and negative ones to be got over from recognition systems of person or any groups.