• Journal of the Society of Disaster Information
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• v.8 no.4
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• pp.391-400
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• 2012

Recently, the construction industry commonly uses FRP as a reinforcement material because of its material advantages. FRP attached reinforcement has various advantages such as high strength, stiffness, excellent durability and construction practicability comparing to its weight. However, external attachment of FRP is water-tighted with low water permeable material, not draining water, probably causing damages on a permanent structure. The study manufactured it through pultrusion and examined GP(glass fiber panel) of which material-mechanical properties are almost same as the existing FRP but durability and attachment performance are better by stationary experiments, testing load-deflection curve, destruction types and load-deflection relation under repetitive loading test. As a result of 2,000,000 fatigue tests, it did not result in the destruction and showed excellent permanent attachment and durability as it displays significantly low compressive strain of concrete.

• Journal of the Society of Disaster Information
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• v.15 no.2
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• pp.206-213
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• 2019

Purpose: This study aims to develop eco - friendly paving materials using Sawdust and EPDM chips. Method: Materials are eco-friendly materials and have no environmental problems. By using EPDM chip, the walking feeling can be increased. Results: In this study, the optimum mixing ratio was calculated through mixing design test. Based on the blending ratio, the surface layer of the sidewalk is made of fine sawdust and EPDM chips. We used only sawdust of grain - 107 -size to make the base layer of the sidewalks and the surface layer of the bicycle road with the permeability and the anti - resilience, and suggested the application method through the test construction. Conclusion: This study the expected that the recent efforts of the government to reduce the elastic paving material, which is the environmentally harmful problem with the complete eco-friendly paving material, are expected to revive.

• Journal of the Society of Disaster Information
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• v.20 no.2
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• pp.411-418
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• 2024

Purpose: This study aims to develop brand new bolt fastening type of seismic retrofit using high tensile alloy materials for existing reinforced concrete columns. Method: A T-type cross-sectional seismic retrofit made of SUS304 and SS275, and the high-tensile bolt of SCM435 was analyzed for the effect of material properties on seismic performance through bending test. Result: The experiment using SUS304 shows a 7% higher maximum strength and 22% higher yield strength and shows a higher compressive stress of 360MPa. In addition, the change in the neutral axis is also smaller. Conclusion: Seismic retrofit using SUS304 is considered to be better in terms of yield strength, tensile strength, neutral axis change, and ductility, and it is considered necessary to experiment with RC column real experiments in future studies.

• Journal of Korea Technology Innovation Society
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• v.21 no.1
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• pp.300-330
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• 2018

Enterprises' participation in the collaboration research is one of the effective and typical methods through which technologies go into the market or are transferred to other sectors. This study reviews enterprises' participated collaboration research and analyzes their network for disaster and safety management area. From 2005 to 2016, 786 technical papers from four representative journals for disaster and safety management in Korea are compiled based on the authors whose affiliations are from enterprises. During the research period, collaboration research is found to be in an increasing trend in general. However, the number of technical papers with three or less authors is in a decreasing trend, whereas that with four or more authors is in an increasing trend. This fact implies that the range of enterprises' collaboration research is widening. Technical paper productivity and each entity's collaboration network are evaluated using participation-weight based author score. Over the research period, a few universities, which attract most of the enterprises, are found to have higher productivities and centralities. Public enterprises show higher participation weights. Also, sectors such as construction, engineering, and electronics demonstrate higher weights. This study is particularly meaningful because enterprises' participation status in collaboration research for disaster and safety management area is systematically analyzed for the first time in Korea. The network analysis result from this study will be especially helpful in establishing technology transfer strategy.

• The Journal of the Korea Contents Association
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• v.16 no.5
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• pp.124-136
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• 2016

Because of continuous outbreaks of disasters and emergencies, the importance of government crisis management has been increased. This study analyzed the Korean government's response messages during the 2015 MERS outbreak, which was an emergency issue that showed a great ripple effect. According to the three diffusion phases of MERS, the semantic network analysis of 134 press releases on the central and local governments' official web sites of MERS was conducted. The results showed that during the early stage of MERS, the central government misperceived the crisis situation, and as a result, specific and enough information was not provided promptly regarding a list of hospitals with known MERS exposure and prevention method. During MERS diffusion and decline stages, Seoul and Gyeonggi-do provided more specific and actionable messages than the central government. This study was meaningful in that it analyzed and evaluated crisis communication messages during an outbreak of the infectious disease. The findings of this study provide useful implications for government officials in their crisis management and communication strategy during emergency risk situations.

• Journal of the Society of Disaster Information
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• v.18 no.2
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• pp.269-279
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• 2022

Purpose: The purpose of this study is to develop a deep learning-based personal protective equipment detection model for disaster prevention at construction sites, and to apply it to actual construction sites and to analyze the results. Method: In the method of conducting this study, the dataset on the real environment was constructed and the developed personal protective equipment(PPE) detection model was applied. The PPE detection model mainly consists of worker detection and PPE classification model.The worker detection model uses a deep learning-based algorithm to build a dataset obtained from the actual field to learn and detect workers, and the PPE classification model applies the PPE detection algorithm learned from the worker detection area extracted from the work detection model. For verification of the proposed model, experimental results were derived from data obtained from three construction sites. Results: The application of the PPE recognition model to construction site brings up the problems related to mis-recognition and non-recognition. Conclusions: The analysis outcomes were produced to apply the object recognition technology to a construction site, and the need for follow-up research was suggested through representative cases of worker recognition and non-recognition, and mis-recognition of personal protective equipment.

• The Journal of the Korea Contents Association
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• v.19 no.11
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• pp.153-167
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• 2019

This study aims to identify the media agenda and to compare each media agenda by media and by time period, analyzing the news about 2019 Gangwon-do's wild fire reported by 37 Korean news media. Using the topic modeling algorithm and semantic network analysis, this study inspected the configuration of the network media agenda and examined the intermedia agenda setting effect by using QAP correlation analysis. Results showed that the sensational media agenda with the attributes such as victim aid and political conflict and the similarity of each media agenda for this disaster reporting.

• The Magazine of the IEIE
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• v.30 no.6
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• pp.49-49
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• 2003

최근 정보화가 고도화되면서, 우리의 경제·사회 활동 기반구조는 인터넷과 같은 정보통신인프라에 절대적으로 의존하고 있어 사이버 안전이 확보되지 않은 정보사회는 어떤 재난보다 치명적인 위험에 직면할 가능성이 점점 더 커지고 있는 상황이다. 최근 발생되었던 1.25인터넷 침해사고는 그러한 위험에 대한 극적인 실례를 보여준 것이라 할 것이다. 따라서, 본 기고문에서는 지난 1.25 인터넷 침해사고의 원인을 분석하여 보고, 향후 이러한 공격에 대한 대응 방안을 개인적 측면, 제도 정책적 측면, 기술적 측면에서 살펴보고자 한다.

• The Magazine of the IEIE
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• v.30 no.6
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• pp.615-623
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• 2003

최근 정보화가 고도화되면서, 우리의 경제·사회 활동 기반구조는 인터넷과 같은 정보통신인프라에 절대적으로 의존하고 있어 사이버 안전이 확보되지 않은 정보사회는 어떤 재난보다 치명적인 위험에 직면할 가능성이 점점 더 커지고 있는 상황이다. 최근 발생되었던 1.25인터넷 침해사고는 그러한 위험에 대한 극적인 실례를 보여준 것이라 할 것이다. 따라서, 본 기고문에서는 지난 1.25 인터넷 침해사고의 원인을 분석하여 보고, 향후 이러한 공격에 대한 대응 방안을 개인적 측면, 제도·정책적 측면, 기술적 측면에서 살펴보고자 한다.

• 한국방재학회:학술대회논문집
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• 2008.02a
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• pp.119-122
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• 2008

Recently, Geographical Information System (GIS) has been progressed in the fields of not only earth sciences and disaster problems, but also medical sciences, economical and social sciences. the southern region of Mid Niigata Region was attacked by intensive earthquake of M.6.8 on Richter Scale on October 23, 2004. The aim of this study was to improve efficiency of restoration operation for early victims relief. Significant issue is achieving the information processing required in restoration operation by spatial temporal information system.