• Journal of Cadastre & Land InformatiX
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• v.52 no.2
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• pp.137-152
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• 2022

The cadastral boundary points which cadastral surveyor presented on the ground by conducting cadastral surveying represents the limits of land ownership and give binding force and determination power. However the land disputes have increased these days mainly due to cadastral registration errors, surveying errors and land owners recognition error. In these cases, the cadastral survey interests try to find solution by either a administrative procedures by appealing civil complaint or border determination litigation through court. The neighboring residents and related organization have difficulties in resolving the civil complaints. In this study cadastral surveying and cadastral boundary determination process has been reviewed and the results of cadastral surveying screening by Central Cadastre Committee from 2016 to 2021 have been classified. The outcomes of this research will be used for cadastral surveying and contribute for reducing land disputes and improve reliablity of cadastral surveying.

• Journal of Korean Society for Geospatial Information Science
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• v.3 no.1 s.5
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• pp.37-44
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• 1995

Cartesian coordinate systems used in national base map have 3 zones. If these coordinate systems are used at navigable digital maps without modifications, the edge-matching errors will occur near the edge of two zones. Therefore, it's required to eliminate separate zones of national plane coordinates system suitable far navigable digital map, we choose TM projection that is used at national base map but changed the location and the scale distortion of antral meridian.

• Proceedings of the Korean Institute of Interior Design Conference
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• 2006.11a
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• pp.58-61
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• 2006

The mixed-use building is certainly one of the significant alternatives for urban dwelling based on the over-crowded urban condition as well as the ever-changing contemporary life patterns. It is clear that residential and other programs somehow are becoming more separated in most high quality mixed-use buildings in Seoul. Thus making the space between residential and other programs where diverse multi activities can be inserted is extremely important in terms of bridging the different urban programs. This research aims to briefly analyze the mixed-use programs in contemporary cities and case projects to see how they respond to unique characteristics of each projects by creating different mixed zones and spaces.

• Proceedings of the Acoustical Society of Korea Conference
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• 1998.06c
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• pp.445-448
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• 1998

고유음향 임피던스가 다른 물질이 층상구조를 이루고 있는 매질내에서 임의의 한 층에 형성된 이차원 초음파 음장이 다른 매질로 전파될 때에의 특성을 각스펙트럼법에 의해 해석하였다. 음원으로서는 baffle된 원형 트랜스듀서를, 층상구조를 매질로서는 물과 생체조직(지방)의 경계를 각각 고려하였다. 해석에 있어서는 먼저 각스펙트럼 분해요소, 즉, 음원의 크기 및 거리에 의존하는 기준음장의 최적 크기와 샘플링 간격을 균질매질을 이용하여 결정한 다음, 그 요소를 층상매질에 적용하였다. 그 결과, 경계면에서의 입사각(공간주파수)의 의존하는 투과계수에 입사음장의 곱으로 나타내어지는 투과음장은 각스펙트럼법에 의해 짧은 시간내에 정도 높게 산출될 수 있음을 보인다.

• Proceedings of the Korea Contents Association Conference
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• 2010.05a
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• pp.624-626
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• 2010

본 연구에서는 다차원공간정보의 하나인 디지털항공정사사진을 이용하여 필지별 지상경계를 생성하여 지상점유 토지의 형상을 확인해 보고자한다. 이는 필지의 관리적 측면에서 정확한 정보로써의 가치제고와 효용을 높이는데 있다.

• Proceedings of the Korean Association of Geographic Inforamtion Studies Conference
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• 2004.03a
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• pp.289-294
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• 2004

본 연구의 목적은 고해상도 위성 영상을 이용하여 식생도 제작 기법을 연구하는 것이며, 식생도에는 활엽수, 혼효림, 침엽수의 군집 경계를 표현하고자 하였다. 본 연구는 고해상도 위성영상을 활용하여 객체지향분류 기법을 적용하였다. 객체지향 분류기법은 크게 세그멘테이션의 과정과 세그멘트를 분류하는 과정으로 나눌 수 있다. 세그멘테이션 과정을 통해서 식생군집의 경계를 추출하고, 영상을 이용하여 상록침엽수를 분류하여 식생조사시 침엽수군락의 위치를 파악함으로써 조사의 효율성을 증대하였다.

• The Korean Journal of Nuclear Medicine
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• v.32 no.5
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• pp.414-424
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• 1998

Purpose: Cross-modality coregistration of positron emission tomography (PET) and magnetic resonance imaging (MR) could enhance the clinical information. In this study we propose a refined technique to improve the robustness of registration, and to implement more realistic visualization of the coregistered images. Materials and Methods: Using the sinogram of PET emission scan, we extracted the robust head boundary and used boundary-enhanced PET to coregister PET with MR. The pixels having 10% of maximum pixel value were considered as the boundary of sinogram. Boundary pixel values were exchanged with maximum value of sinogram. One hundred eighty boundary points were extracted at intervals of about 2 degree using simple threshold method from each slice of MR images. Best affined transformation between the two point sets was performed using least square fitting which should minimize the sum of Euclidean distance between the point sets. We reduced calculation time using pre-defined distance map. Finally we developed an automatic coregistration program using this boundary detection and surface matching technique. We designed a new weighted normalization technique to display the coregistered PET and MR images simultaneously. Results: Using our newly developed method, robust extraction of head boundary was possible and spatial registration was successfully performed. Mean displacement error was less than 2.0 mm. In visualization of coregistered images using weighted normalization method, structures shown in MR image could be realistically represented. Conclusion: Our refined technique could practically enhance the performance of automated three dimensional coregistration.

• Journal of Korean Tunnelling and Underground Space Association
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• v.21 no.6
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• pp.861-874
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• 2019

A great interest in the seismic performance evaluation of small size tunnel structures such as utility tunnel has been taken since recent earthquakes at Pohang and Gyeongju in Korea. In this study, the three-dimensional dynamic analyses of vertical shaft and horizontal tunnel under seismic load were carried out using FLAC3D. Especially, parametric analyses was performed to investigate the effects of interfacial stiffness on interfacial behavior between soil and structure. The parametric analysis showed that the interfacial stiffness scarcely gave an effect on the global dynamic behavior of the structure, while had a significant effect on the local displacement behavior of the connections. The magnitude of the interfacial stiffness was inversely proportional to the displacement, while the magnitude of interface stiffness was proportional to the normal and shear stresses. The results of this study suggest the limitations of the existing empirical equations for interfacial stiffness and emphasize the need to develop new interfacial stiffness models.

• 주택과사람들
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• s.193
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• pp.50-53
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• 2006

도예의 경계를 무너뜨리고 흙을 이용해 새로운 예술 장르를 개척한 홍익대학교 미술대학장 신상호 교수. 그는 다른 이들이 발견하지 못한 가능성을 끌어내고 끊임없이 새로운 것을 만들어내는 자유로운 예술가다. 흙내음 물씬 풍기는 자연에 취한 신상호 교수의 삶과 공간을 만나본다.

• Proceedings of the KOR-KST Conference
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• 2007.02a
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• pp.228-235
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• 2007