• Journal of Korean Society of Disaster and Security
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• v.15 no.4
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• pp.31-38
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• 2022

In the case of special bridges whose superstructure is supported by cables, there are many blind spots that are difficult to access without special equipment and personnel. As a result, there are difficulties in the safety inspection of special bridges. The purpose of this study is to review the inspection blind spots of cable-supported bridges such as cable-stayed bridges and suspension bridges, and to study ways to eliminate blind spots using drones. To this end, the cables, stiffened girder, and pylons of the cable-stayed bridge located in the sea were inspected using drones. Through this study, it was confirmed that external safety inspection of special bridges that are difficult for inspectors to access is possible using drones. In particular, drone inspection to check the external condition and damage of the pylon, which is a blind spot for inspection of special bridges, is a very effective safety inspection method.

• Korean Journal of Social Welfare Studies
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• v.47 no.1
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• pp.179-204
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• 2016

The purpose of this study is to establish the concept of the blind zone of social services and analyzing the conditions by children, the elderly, the disabled, and the poor. This study used the raw data of demand/supply of social service and sample size is 4,038. Results of the study were as follows. First, in terms of the coverage, the biggest blind zones of social service are the employment support and cultural service. These results were similar for all households. But, it is noteworthy that the size and proportion of blind zones of housing support services for children, counseling services for elderly are relatively big. Second, in terms of adequacy, the most serious blind zones of social service are health and the employment support service. Especially, the elderly, the disabled, and the poor are not the most adequate adult care services and children are community service. Based on such findings, this study suggests expansion of employment support services and health care, monitoring for the services analyzed to be over-supply, and intensive involvement of private sectors about the services provided by the government of a large blind zone.

• Journal of Korean Society of Disaster and Security
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• v.16 no.4
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• pp.129-136
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• 2023

A special offshore bridge with a high pylon has special structural features.Special offshore bridges have inspection blind spots that are difficult to visually inspect. To solve this problem, safety inspection methods using drones are being studied. In this study, image data of the pylon of a special offshore bridge was acquired using a drone. In addition, an artificial intelligence algorithm was developed to detect damage to the pylon surface. The AI algorithm utilized a deep learning network with different structures. The algorithm applied the stacking ensemble learning method to build a model that formed the ensemble and collect the results.

• Journal of Cadastre & Land InformatiX
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• v.49 no.2
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• pp.57-66
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• 2019

Recently, as a part of the production of spatial information by smart cities, three-dimensional reproduction of structures for reverse engineering has been attracting attention. In particular, terrestrial LiDAR is mainly used for 3D reproduction of structures, and 3D reproduction research by UAS has been actively conducted. However, both technologies produce blind spots due to the shooting angle. This study deals with vertical structures. 3D model implemented through SfM-based image analysis technology using UAS and reproducibility and effectiveness of 3D models by terrestrial LiDAR-based laser scanning are examined. In addition, two 3D models are merged and reviewed to complement the blind spot. For this purpose, UAS based image is acquired for artificial rock wall, VCP and check point are set through GNSS equipment and total station, and 3D model of structure is reproduced by using SfM based image analysis technology. In addition, Through 3D LiDAR scanning, the 3D point cloud of the structure was acquired, and the accuracy of reproduction and completeness of the 3D model based on the checkpoint were compared and reviewed with the UAS-based image analysis results. In particular, accuracy and realistic reproducibility were verified through a combination of point cloud constructed from UAS and terrestrial LiDAR. The results show that UAS - based image analysis is superior in accuracy and 3D model completeness and It is confirmed that accuracy improves with the combination of two methods. As a result of this study, it is expected that UAS and terrestrial LiDAR laser scanning combination can complement and reproduce precise three-dimensional model of vertical structure, so it can be effectively used for spatial information construction, safety diagnosis and maintenance management.

• Journal of the Korea institute for structural maintenance and inspection
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• v.27 no.3
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• pp.58-70
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• 2023

Based on the current state of safety management for small-scaled old buildings, this study identified problems and proposed improvement plans. The study investigated the current status of safety management based on relevant laws and government and financial portal data, as well as budget documents related to the targets of safety management, the organization responsible for safety management, and the budget required for organizational operation. As a result, the study revealed the problem of safety management blind spots for buildings that are not included in the legal safety inspection targets. It also identified difficulties in securing specialized personnel for the operation of local building safety centers and financial constraints for the operation of building safety special accounting. To address these issues, the study proposed measures such as expanding the scope of safety inspection targets for small-scaled old buildings to reduce safety management blind spots, improving compensation regulations for specialized personnel, setting a minimum ratio for enforcement fines to secure financial resources, and gradually adjusting building permit fees. The study aimed to contribute to improving the efficiency of safety management for small-scaled old buildings based on these proposed measures.

• The Journal of the Convergence on Culture Technology
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• v.8 no.1
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• pp.371-377
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• 2022

This study examines whether there are subjects and learners to pay attention to as 'processes' that have not been dealt with in Korean vocabulary education due to prioritizing learning outcomes, educational outcomes, and objects. In addition, the purpose of this study was to examine the educational value of the neologism and to suggest data construction method for it. Proposal to create a 'single-level list' of neologisms as a preliminary work to create a dictionary as a learning material to teach new words to academic purpose learners, taking neologism as the vocabulary in the blind spot and foreign academic purpose learners as learners in the blind spot stage. did The 'single-layered list' is to divide new words by period into coined words, meanings, culture, etc. and construct them as data. Through this study, we will help systematically teach Korean vocabulary by adding vocabulary to be learned as a 'process' to the results of Korean vocabulary education so far.

• Journal of the Korean Institute of Illuminating and Electrical Installation Engineers
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• v.23 no.10
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• pp.81-89
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• 2009

Recently, Guard lamp was divided from electric facilities for general use as dangerous zone of safety management. This paper presents a remote inspection system of guard lamp that can monitor electrical safety factor. Especially, the developed system adopts the measurement algorithm for detecting resistive leakage current($I_{gr}$) flowing based on the phase difference checkable for sensing at a monitor. Also, It was fabricated the repeater for data transmission and the MMI program At this system, we made experiment on stability of resistive leakage current to verify phase comparison detecting algorism.

• Proceedings of the Korean Information Science Society Conference
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• 2011.06d
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• pp.118-121
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• 2011

기존 개인정보보호관련 법은 공공과 민간으로 개별화된 체계로 인하여 헌법기관, 오프라인 사업자, 비영리기관등은 관련법이 부재함에 따라 법 적용의 사각지대라는 커다란 허점을 드러냈다. 또한, 개별 법 사이의 보호원칙, 처리기준 및 추진체계가 상이하여 법의 보호를 받는 국민들에게 혼란을 주기도 한다. 본 논문은 신규 제정되어 2011년 9월 발효가 예정되어 있는 개인정보보호법(안)을 기준으로 기업이 개인정보보호 수준을 스스로 측정할 수 있는 지표를 만드는 것에 목표를 두고 있다.

• Proceedings of the Korean Society of Disaster Information Conference
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• 2023.11a
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• pp.219-220
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• 2023

본 논문에서는 건축물의 고층화, 대형화로 외벽 청소, 도장, 견출, 검사등 작업시 손쉽고, 빠르며 경제적으로 작업을 위한 방법으로 작업의자형 달비계를 사용 하고 있으나 최근 3년간 유지·보수공사 작업시 근로자의 중대재해가 36명으로 신축·증축·재건축공사 2명으로 유지·보수공사에서 많은 중대재해가 발생되고 있는 실정으로 50억이상 신축 작업에서는 산업안전보건법에 의하여 관리감독자 및 안전관리자가 선임 되어 현장의 전반적인 안전관리 활동을 하고 있으나 50억 이하 소규모 작업장에서는 안전관리 할동이 전무한 실정이고 저가수주, 적정 공사기간 불가 및 산업안전보건관리비 미계상 등 근로자들에 대한 안전대책이 없고 외부 안전점검기관의 사각지대로 근로자의 안전 확보에 어려움이 있은 실정으로 사업주 및 근로자에 대한 안전교육 및 관리감독이 철저히 이루어져야 할 것이다

• Fire Science and Engineering
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• v.30 no.2
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• pp.133-140
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• 2016

Currently, the maintenance of fire products at the site of fire-fighting property are presumably carried out by a fireand/or self. On the other hand, of the special fire-fighting property, only 3.4% of them are the target for a comprehensive precision inspection, which is performed by fire protection management firms. Aging fire products for the rest of special fire-fighting property are absolutely beyond any inspection and reliability verification. This is also true with respect to general households. In this report, the current practice of fire products' useful life management at the site of fire-fighting property were studied. For this study, 32 items of fire products were identified. For the sample data, public institutions and 17 cities and provinces were classified into 18 groups, from which 30 sample targets for each group were determined. Of these targets 422 samples were recovered, based on which this study for establishing a useful 'Management Control System of the Fire Products and its Useful Life' was conducted.