• 한국전기전자재료학회논문지
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• 제36권5호
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• pp.474-481
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• 2023

This paper is an experimental study on the optimal operating conditions of direct charging type electrospray for particulate matter collection. To perform the research, a direct charging type electrospray visualization system was configured to photograph the spray shape of microdroplets, and experiments were performed with varying electrode distance, flow rate, and applied voltage, which are the main factors affecting the particulate matter collection efficacy. Through image processing, the total number of microdroplets according to each condition was analyzed, and the number of microdroplets with a diameter of 1.5 mm or less was confirmed. In addition, by calculating the number of microdroplets per power consumption according to the applied voltage, the optimal operating conditions were derived in terms of energy consumption efficacy, and the microdroplet size distribution was analyzed under the optimal operating conditions. As a result of the experiment, it was confirmed that the optimal operating condition was at a flow rate of 10 mL/min and a voltage of -20 kV in case of 5 mm electrode distance, and at a flow rate of 15 mL/min and a voltage of -30 kV in case of 100 mm electrode distance.

• 한국안전학회지
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• 제28권1호
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• pp.137-143
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• 2013

Cultural heritage passing down to posterity is a global concern. But there are many culture heritage that not remained to now disappeared by various disasters. It is told that disaster is learnt from disaster. The most fundamental task in disaster prevention is to collect and analyze cases of accidents so as not to repeat a disaster. In other words, an analysis of various disaster-related materials and their countermeasures in the Joseon period is an actual condition-based phenomenological methodology used to prevent disasters at cultural properties today. In this context, it is important to collect histories of disasters in the Joseon period, to extract disaster-related historical data and to categorize the data to build a disaster literature database. This study has produced [Database of Disasters in the Joseon Era], a collection of articles on fire outbreaks based on The Annals and The Daily Records belonging to the Memory of the World. On the basis of this chronology, human and property damages caused by fires in Joseon have been examined, identified by districts, as well as disaster technologies, have been analyzed. It has also built disaster vulnerability maps in the Joseon Dynasty Era.

• 한국멀티미디어학회논문지
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• 제15권2호
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• pp.273-280
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• 2012

최근 우리사회는 집중호우, 산사태 등의 재해발생으로 사회적으로 적지 않은 피해를 입고 있다. 이에 따라 재난 관련기관에서는 효과적인 대응체계를 마련하기 위해 많은 노력을 기울이고 있다. 특히, 스마트폰이 사회 여러 분야에서 폭넓은 활용이 이루어짐에 따라 재난방재 분야에서도 이를 활용하는 시스템 구축에 대한 연구 및 개발이 활발하게 진행되고 있다. 하지만 대부분 간단한 형태의 재난정보만 제공하기 때문에 사용자의 상황 및 요구조건을 고려하는 재난정보 서비스는 제공되지 않고 있다. 따라서 본 논문에서는 재난정보수집 및 제공이 상호 연계적으로 가능한 체계 구성과 사용자의 요구에 따라 정보를 검색할 수 있는 애플리케이션 기능을 구현하여 더욱 효율적인 재난정보서비스를 구축한다.

• Industrial Engineering and Management Systems
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• 제12권4호
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• pp.336-350
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• 2013

This paper proposes a mathematical modeling-based approach for assessing disaster effects and selecting suitable mitigation alternatives to provide humanitarian relief (HR) supplies, shelter, rescue services, and long-term services after a disaster event. Mitigation steps, such as arrangement of shelter and providing HR items (food, water, medicine, etc.) are the immediate requirements after a disaster. Since governments and non-governmental organizations (NGOs) providing humanitarian aid need to know the requirements of relief supplies and resources for collecting relief supplies, organizing and initiating mitigation steps, a quick assessment of the requirements is the precondition for effective disaster management. Based on satellite images from weather forecasting channels, an area/dimension of the disaster-affected zones and the extent of the overall damage may often be obtained. The proposed approach then estimates the requirements for HR supplies, supporting resources, and rescue services using the census and other government data. It then determines reliable transportation routes, optimum collection and distribution centers, alternatives for resource support, rescue services, and long-term help needed for the disaster-affected zones. A numerical example illustrates the applicability of the model in disaster mitigation planning.

• 한국정보시스템학회지:정보시스템연구
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• 제20권3호
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• pp.63-79
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• 2011

Deducting the risk level of infrastructure and buildings based on past human disaster risk cases and implementing prevention measures are important activities for disaster prevention. The object of this study is to measure the confidence to proceed quantitative analysis of various disaster risk cases through text mining methodology. Indeed, by examining confidence calculation process and method, this study suggests also a basic quantitative framework. The framework to measure the confidence is composed into four stages. First step describes correlation by categorizing basic elements based on human disaster ontology. Secondly, terms and cases of Term-Document Matrix will be created and the frequency of certain cases and terms will be quantified, the correlation value will be added to the missing values. In the third stage, association rules will be created according to the basic elements of human disaster risk cases. Lastly, the confidence value of disaster risk cases will be measured through association rules. This kind of confidence value will become a key element when deciding a risk level of a new disaster risk, followed up by preventive measures. Through collection of human disaster risk cases related to road infrastructure, this study will demonstrate a case where the four steps of the quantitative framework and process had been actually used for verification.

• 한국화재소방학회논문지
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• 제23권6호
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• pp.24-31
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• 2009

재난의 환경은 매우 복잡 다양한 양상을 띠고 있으며, 예측 불가능한 재난의 발생으로 인하여 대규모인적소(昭)걋$^{\circ}$ 피해를 입고 있다. 특히, 최근에는 기상이변 현상으로 말미암아 대홍수와 혹서, 가뭄, 혹한, 지진 등 대규모 자연재난이 세계 전역에 걸쳐 발생하고 있는 실정이다. $9{\cdot}11$ 테러사건이후 대부분의 국가는 국민의 생명과 재산의 보호는 물론 국가 안전망을 구축하기 위한 노력을 꾸준히 진행하고 있다. 본 연구는 재난대응 기관인 소방서에서 현재 사용하고 있는 재난정보시스템의 실태를 분석하고, 재난관리를 위한 유비쿼터스(Ubiquitous) 정보기술 활성화 방안, 즉 재난정보 데이터베이스구축, 재난주기 통보, 위험성 분석, 시설물정보 시스템, 재난방송 시스템, 위치추적 시스템, 재난피해수집 시스템 등을 재난단계별로 제시하여 안전한 국민의 삶을 실현하고자 하였다.

• 한국응급구조학회지
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• 제27권3호
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• pp.17-32
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• 2023

Purpose: We aimed to identify disaster preparedness, disaster response competency, and willingness to participate in disaster response among university students. Methods: Data were collected from the paramedic students after consent to this study through online. The period of data collection was from June 13 to August 3, 2023 and 207 questionnaires were analyzed using SPSS 27.0 program. Results: The subject's disaster preparedness was 7.67±3.10 out of 15, disaster response competency was 2.79±0.69 out of 5, and willingness to participate in disaster response was 6.06±4.59 out of 15. There was a significant difference in disaster preparedness depending on the disaster education experience (p<.001), in disaster response competency depending on the number of courses completed (p<.05), in willingness to participate in disaster response in cases of disaster experience (p<.05) and number of times disaster education was completed (F=3.146, p=.047). In particular, if the number of disaster training courses completed was three or more, disaster response competency and willingness to participate in disaster response were significantly high. There was a significant positive correlation between the subjects' disaster preparedness and disaster response competency (r=.655, p<.001). Conclusion: Three or more sessions of continuous disaster education is important, it will be necessary to develop educational content that matches the characteristics of the target subjects or college.

• 한국안전학회지
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• 제33권3호
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• pp.65-70
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• 2018

Terrain data for disaster analysis in hazardous or disaster areas is not only important but also needs to be built quickly. In particular, the introduction of drones is in the early stages of research using drones in a variety of fields such as shooting, analyzing and managing hazardous areas. It is expected that drone will be faster, safer and more effective than existing data collection method in case of small scale disaster hazard area and disaster area where equipment or manpower input is difficult. Therefore, in this study, drone shooting was performed for hazardous areas in mountainous roads located in Samcheok city, Gangwon province, and ground reference points were measured by RTK-GPS. The measured data were converted into DSM (Digital Surface Model) data by coordinate correction using Pix4D postprocessing program and then applied to the analysis of the hazard area of mountainous area. As a result, it was shown that it is effective to identify the risk by using the basic terrain data obtained from the drones.

• International Journal of Advanced Culture Technology
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• 제6권1호
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• pp.23-31
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• 2018

The purpose of this study was to identify mediating effect of major satisfaction in the effect of critical thinking disposition on disaster recognition. For this study, 237 students of nursing students from universities in Jeollanam do participated in the study. The data collection was collected on Dec 1 to 7, 2017. The descriptive statistics was used to analyze general characteristics of participants, the differences in disaster recognition according to general characteristics were analyzed by t-test or ANOVA. Regression analysis was conducted to confirm the effect of critical thinking disposition on disaster recognition and Baron, R.M. And Kenny, D.A.'s mediation effect statistic analysis was used to confirm the mediating effect of major satisfaction in critical thinking disposition on disaster recognition. As a result, the critical thinking disposition affects the disaster recognition, and it was judged that the major satisfaction was mediating role. intellectual fairness sub-factor showed perfect mediating effect and confidence and general truth sub-factor showed partial mediating effect. Based on the above findings, it can be seen that not only critical thinking but also satisfaction with the major should be considered in order to increase the recognition of the sudden disaster. In this case, research for linking critical thinking disposition and major satisfaction is likely to be meaningful. Through the results of this study, we suggest the program development of a linkage between critical thinking disposition and major satisfaction to increase the recognition of disaster.

• 대한원격탐사학회:학술대회논문집
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• 대한원격탐사학회 2005년도 Proceedings of ISRS 2005
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• pp.69-71
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• 2005

Earthquake disaster frequently happens in Shizuoka Prefecture and it is commonly predicted that a giant earthquake(Tokai Earthquake) could occur in the near future. When a giant earthquake happens, extensive damage of lifelines will be expected. It is considered that the collection of damage information and the establishment of a communication network system are very important in order to restore lifelines quickly. And geographic information system(GIS) might playa very important role to grasp the spatial information of lifeline damage in a natural disaster. The authors' group had a research project to study a lifeline restoration support system with image processing and ad hoc networking in a natural disaster. The objectives of this presentation are to introduce our project and to show some results of our study. The authors finally constructed the GIS for the integration of damage information acquired by image processing and ad hoc networking.