• Korean Journal of Remote Sensing
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• v.37 no.5_3
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• pp.1425-1434
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• 2021

Continuous and periodic data acquisition must be preceded to maintain and manage the river facilities effectively. Adapting the existing general facilities methods, which include river surveying methods such as terrestrial laser scanners, total stations, and Global Navigation Satellite System (GNSS), has limitation in terms of its costs, manpower, and times to acquire spatial information since the river facilities are distributed across the wide and long area. On the other hand, the Mobile Mapping System (MMS) has comparative advantage in acquiring the data of river facilities since it constructs three-dimensional spatial information while moving. By using the MMS, 184,646,009 points could be attained for Anyang stream with a length of 4 kilometers only in 20 minutes. Levee points were divided at intervals of 10 meters so that about 378 levee cross sections were generated. In addition, the waterside maximum and average slope could be automatically calculated by separating slope plane form levee point cloud, and the accuracy of RMSE was confirmed by comparing with manually calculated slope. The reference slope was calculated manually by plotting point cloud of levee slope plane and selecting two points that use location information when calculating the slope. Also, as a result of comparing the water side slope with slope standard in basic river plan for Anyang stream, it is confirmed that inspecting the river facilities with the MMS point cloud is highly recommended than the existing river survey.

• Proceedings of the Korean Society of Soil and Groundwater Environment Conference
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• 2004.09a
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• pp.281-285
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• 2004

폐기물 매립시설물은 지진에 의해 파괴될 경우 시설물 파괴로부터 인명 및 경제적인 피해와 더불어 복구하기 어려운 환경적인 문제가 발생한다. 따라서 지진시 지반 및 구조물의 거동을 정확히 예측하기 위한 신뢰성 있는 지반 가속도의 증폭현상 평가가 필요하다. 본 연구에서는 1차원 지반응답특성 평가 프로그램인 SHAKE91과 유한차분 프로그램인 FLAC을 이용 하여 폐기물 매립지에서의 지진거동 특성을 분석하였다. 1차원 해석결과 연약층이 존재하는 곳에서 지반변형이 많이 이루어졌고, FLAC 해석결과 폐기물층 사면부에서 뚜렷한 변위벡터가 발생하였으나 내진 2등급 매립지의 허용변위 30cm 이내이므로 해석 대상 구조물은 안전함을 알 수 있었다.

• The Journal of The Korea Institute of Intelligent Transport Systems
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• v.22 no.1
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• pp.16-24
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• 2023

Accidents are greatly reduced through projects to improve frequent traffic accidents. These results show that safety facilities play a big role. Traffic accidents are caused by various causes and various environmental factors, and it is difficult to achieve improvement effects by installing one safety facility or facilities without standards. Therefore, this study analyzed the improvement effect of each accident type by combining the two safety facilities, and suggested a method of predicting the combination of safety facilities suitable for a specific point, including environmental factors such as road type, road type, and traffic. The prediction was carried out by selecting an XGBoost technique that creates one strong prediction model by combining prediction models that can be simple classification. Through this, safety facilities that have had positive effects through improvement projects and safety facilities to be installed at points in need of improvement were derived, and safety facilities effect analysis and prediction methods for future installation points were presented.

• Spatial Information Research
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• v.11 no.1
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• pp.41-60
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• 2003

It is noted that the paper mapping system for University Building Facility has many limitations in terms of data maintenance, real-time GIS data acquisition, and economic efficiency. The aim of this research was to evaluate an operational potential of an on site real-time mobile GIS technique to resolve the problem faced in the university. The idea is based upon the recent trends in the field of 'Telecommunication and Information Technology' that uses a PDA (personal Digital Assistants), wireless network computing, mobile computing, etc. A real time mobile GIS approach has been adopted, in which a PDA is linked to a wireless internet and field workers record data on the computer at the site and analyse data on site. While there should be a considerable number and variety of factors associated with real-time mobile GIS quality, this research focuses on three criteria that are identified as fundamental to customer requirements; (1) data quarry (2) spatial analysis (3) real-time GIS database building. 'Art--empirical study for a case study facility has been conducted to confirm the validity for the system. The system has been checked experimentally, enabled the field users to quarry the data required simply and execute spatial analysis (buffer, overlay etc.,) accommodating versatile alternatives on the site. Detailed visual maps can be generated over large areas quickly and easily. The PDA interface, in particular, were ideally suited for field users to interactively displaying positional information with attribute data. This system has shown to be quite convenient to maintaining a highly reliable database since it could playa crucial role in documenting at real-time basis temporal and spatial changes occurred in the facilities. It is anticipated that this research output will greatly serve to introduce the reliable and cost-effective facility mapping system in the university by overcoming serious constraints suffered from the past non-real time mobile GIS approach.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.18 no.1
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• pp.513-522
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• 2017

Rapid urbanization is being portrayed around the world au causing difficulty to manage public hygiene and maintain public order. Common problems often detected in urban areas including traffic congestion and the deterioration of the ecological environment are also being exacerbated. Despite all the effort being made by the government and local governments to manage urban facilities, urban residents are subjected to various levels of difficulty, due to the number of facilities to be managed exceeding the number of management personnel and the lack of an adequate management system. The aim of this study is to propose a management method using smart phones to improve the maintenance efficiency of urban facilities. First, the one-stop maintenance of urban facilities, including facilities information management, maintenance management and history management, is made possible by using smart phones to collect and transfer pictures and the locations of the urban facilities. Second, maintenance management is based on the location and picture information of the subject, not the location of the smart phones, which enables a prompt understanding of and actions to be taken for the facility. This method is especially effective as the smart phone application sends the facility status information directly to the maintenance personnel. Third, all of the information and figures relating to the facilities is managed using a database, resulting in the easy utilization of the history management and data. Fourth, all of the urban residents have access to this information via smart phone applications and, therefore, expanding the role of the facility maintenance personnel is made possible without any additional investment in infrastructure. Lastly, the location-based information enables the management of roads, trees and trails.

• Proceedings of the Korean Institute of IIIuminating and Electrical Installation Engineers Conference
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• 2002.11a
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• pp.297-302
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• 2002

지속적인 경제성장으로 초고층 복합 첨단정보빌딩이 급속히 증가하고, 국민생활 수준의 질적향상으로 쾌적한 환경 요구에 부응하여 고급에너지인 전력 소비량이 매년 10%이상 높게 증가하고 있어 효율적인 전력관리가 절실히 요구되고 있다. 전력소비량이 많은 산업(제조업)분야와 건축물분야 다소비시설물의 전력원단위를 분석하고 효율적인 전력관리 방안을 제시하여 전력사용합리화를 이룩하고자 한다.

• Proceedings of the Korean Society for Rock Mechanics Conference
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• 1995.03a
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• pp.202-212
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• 1995

지리정보시스템은 1980년 이후에 자연자원 관리뿐만 아니라 환경관리를 비롯하여 현재에는 지하시설물 관리 및 도시정보 관리 등을 위한 수단으로써 여러 분야에서 필수적으로 활용되고 있는데 그러한 예로 한국의 사회기반 시설물 GIS 구축방안(이태식 외, 1994), GIS를 이용한 통신선로 시설관리(최지선, 1994), GIS를 이용한 하천공간 데이타베이스 구축에 관한 연구(이태식 외, 1994), 금강유역 토양 유실 분석을 위한 GIS 응용연구(김윤종 외, 1994)등 있다. (중략)

• Proceedings of the Korean Institute of Navigation and Port Research Conference
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• 2022.11a
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• pp.26-27
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• 2022

과거에는 바다와 해안가의 특수한 환경 때문에 항로표지시설을 점검하기 위해서 항로표지선을 이용하여 직접 시설물을 점검하였다. 최근에는 드론을 활용하여 다양한 분야에서 시설물을 점검하고 있지만 해양 분야에서는 바람과 염분, 비행시간 문제로 드론을 활용허기 어려웠다. 이에 본 기관은 해양에 특화된 드론을 활용하여 포항신항 내 고정된 위치의 등부표 장비들을 지정된 순서로 이동하며 장비의 정상작동 여부와 상태를 점검하였다. 본 논문에서는 드론을 활용하여 항로표지시설을 점검하기 위한 방법을 제시한다.

• Journal of the Korea institute for structural maintenance and inspection
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• v.27 no.3
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• pp.1-11
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• 2023

After the collapse of the Seongsu Bridge in the 1990s in Korea, attention was focused on the maintenance of facilities. The government has established various policies since the enactment of the Act in 1995 until recently. In general, safety inspections are performed to evaluate the safety grade of facilities, and facilities are maintained and managed by performing repairs and reinforcements for defects. However, since the budget is limited, it is impossible to carry out repair and reinforcement projects for all defects. It is necessary to prioritize repair and reinforcement measures. Then, the priority index (PI) is presented considering the importance of members, the seriousness of defects, and economic feasibility. In this index, the degree of influence can be adjusted within the range of 50 to 100% according to the expert's subjective judgment, and the same weight is set for some specific members. Also, the effect through repair and reinforcement is not taken into account decisively, and most of them have a limit in which priority is determined by economic feasibility. Therefore, in this study, through several case studies, problems with the priority index were reviewed and an equation was presented to improve them.

• Magazine of the Korean Society of Agricultural Engineers
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• v.60 no.1
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• pp.51-57
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• 2018