• Journal of the Economic Geographical Society of Korea
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• v.7 no.2
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• pp.117-136
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• 2004

The main purpose of this paper is to review the research on the border region, especially herein to consider theoretical models critically and then to gain the implication for appropriate analytical framework or rather theoretical model on the basis of the findings. Through the review of various literature, major finding are as follows. First, the term of border or frontier was used in a rather ambiguous way. Second, the early models in the border region research have been developed to explain barrier effects, of which the border was considered to playa role. However, as border regions change from the closed regions to the opened ones, more adequate models have accordingly been developed. Third, there were several attempts to typify border regions and they tend to focus on the issue of regional development of the regions. Fourth, according to the case studies of the border region research, many border regions are not in isolation or peripheral position any more. Rather they are transformed into potentially prosperous regions through the support of authority as well as inter-regional cooperation.

• Proceedings of the Korean Environmental Sciences Society Conference
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• 2003.05a
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• pp.161-163
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• 2003

• Proceedings of the KSEG Conference
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• 2000.04a
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• pp.47-54
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• 2000

• Proceedings of the Korean Institute of Landscape Architecture Conference
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• 2001.10a
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• pp.6-9
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• 2001

• Journal of the Korean GEO-environmental Society
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• v.13 no.8
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• pp.65-73
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• 2012

Soil-rock interface, mainly founded in Granite region of Korea, is known as one of the important factor of the slope failure at the rainfall due to smaller shear strength than soil itself. However, research of the effect on slope stability by soil-rock interfaces is insufficient. Therefore, a series of direct shear tests were performed in order to investigate the effect of soil-rock interface on slope stability. The method of tests is to get sand itself and sand-artificial rock interface shear strength from different grain size of sands and artificial rock samples. The results of tests show that the friction angle of interface depends primarily on particle size and surface roughness. Interface friction angle ratio ${\mu}(={\delta}/{\Phi})$ is in the range of 0.75 ~ 0.96, this results indicate that interface friction angle is smaller than sand itself.

• Proceedings of the Korean Society of Surveying, Geodesy, Photogrammetry, and Cartography Conference
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• 2003.10a
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• pp.433-437
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• 2003

고해상도 위성영상을 이용하여 수치표고모델(DEM) 및 정사영상을 제작해서 수치지도의 갱신 및 지형공간정보체계의 자료기반으로써 활용할 수 있다. 본 연구에서는 Sobel 연산자를 이용하여 경계추출을 행한 후 스크린 디지타이징 방법으로 경계선을 추출하였다 이렇게 추출된 벡터자료와 기존수치지도와의 중첩을 통해서 건물, 도로, 임야의 평균위치오차를 분석해 보았다. 평균위치오차가 공공측량의 작업규정에 대한 1 : 5,000 수치지도 제작의 허용오차범위에는 들지 못하였지만, 특정 부분의 지형·지물의 경우에는 수정, 보완이 가능한 것으로 나타났다. 그리고, 산악지역 보다는 도심지에서의 경계추출이 뚜렷하기 때문에 위치정밀도가 향상됨을 알 수 있었다.

• Proceedings of the Korean Information Science Society Conference
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• 2004.10b
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• pp.628-630
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• 2004

정렬되지 않은 3차원 측정 점들로부터 이들을 근사하는 표면을 재구성하는 방법을 제안하였다. 제안된 방법은 경계면 축소포장 방식에 의한 표면 재구성 방법 (shrink-wrapped boundary face : SWBF)으로, 측정 점으로부터 경계셀과 경계면을 구해 초기 메쉬를 생성하고 이를 연속적으로 축소하는 방식에 의해 표면을 재구성한다 제안된 방법은 기존의 표면 축소포장 방식의 메쉬 생성 방법의 문제점인 물체의 토폴로지에 대한 제악이 없이 어떠한 형태의 표면 재구성에도 적용이 가능하며, 기존 방법이 축소 단계에서 각 메쉬 정점에 대한 최단거리 측정점을 찾는 전역 탐색을 해야 하는데 비해 지역 탐색만으로 최적의 측정 점을 찾을 수 있으므로 처리 시간 측면에서도 우월하다. 실험을 통해 제안된 표면 재구성 알고리즘이 측정 점들간의 관계를 알 수 없는 정렬되지 않은 3차원 정들에 대한 표면 재구성에 매우 안정적이고 효과적임을 확인할 수 있었다.

• Journal of Korean Society of Coastal and Ocean Engineers
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• v.13 no.2
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• pp.100-108
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• 2001

Along the shoreline a special treatment is required to simulate movement of periodic waves such as tsunami and tide because of continuous movement of shoreline as waves rise and recede. A moving boundary treatment is first proposed to track the movement of shoreline in this study. The treatment is then employed to obtain a maximum inundation area to be used for mitigation of coastal flooding. The obtained maximum inundation zone for a specific location is compared to that of available observed data. A reasonable agreement is observed.

• Proceedings of the Korean Society of Computer Information Conference
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• 2017.07a
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• pp.368-371
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• 2017

본 논문에서는 GPS기반 가상펜스 시스템과 가상펜스 알고리즘에 대해서 이야기하고, GPS기반 가상펜스 시스템에서 가축의 이탈을 방지하기 위해 설정하는 영역인 경계영역을 설정하기 위한 알고리즘을 제안한다. 그리고 경계영역을 설정하기 위해 필요한 파라미터를 정의하는 실험을 진행하였으며, 속력이 빨라지면 정확도가 증가하는 GPS의 특성에 의해서 가상펜스 시스템에서 가상펜스 디바이스의 안전지역 이탈시 자극이 발생하는 시간이 빨라짐을 확인할 수 있었다.

• Journal of the Korean Association of Geographic Information Studies
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• v.15 no.1
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• pp.87-98
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• 2012

A river boundary is defined as the intersection between a main stream of a river and the land. Mapping of the river boundary is important for the protection of the properties in river areas, the prevention of flooding and the monitoring of the topographic changes in river areas. However, the utilization of the ground surveying technologies is not efficient for the mapping of the river boundary due to the irregular surfaces of river zones and the dynamic changes of water level of a river stream. Recently, the spatial information data sets such as the airborne LiDAR and aerial images are widely used for coastal mapping due to the acquisition of the topographic information without human accessibility. Due to these advantages, this research proposes a semi-automatic method for mapping of the river boundary using the spatial information data set such as the airborne LiDAR and the aerial photographs. Multiple image processing technologies such as the image segmentation algorithm and the edge detection algorithm are applied for the generation of the 3D river boundary using the aerial photographs and airborne topographic LiDAR data. Check points determined by the experienced expert are used for the measurement of the horizontal and vertical accuracy of the generated 3D river boundary. Statistical results show that the generated river boundary has a high accuracy in horizontal and vertical direction.