• Journal of the Korean Institute of Gas
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• v.26 no.4
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• pp.36-40
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• 2022

Recently, the biggest topic in the industry is the area of industrial safety and health management. Since city gas is flammable gas and has a high risk of fire and explosion, much effort is required to prevent serious industrial and citizenry disasters. As part of city gas safety management, this study attempted to quantitatively predict the scope and degree of damage in the event of an explosion accident caused by city gas leakage through the Consequence Analysis. As a result, there was a difference in the accident result value according to various leakage conditions such as pressure and weather conditions. Through this study, a scenario of explosion due to city gas leakage will be prepared when performing city gas safety management work and used to prepare more effective accident prevention and emergency action plans.

• Journal of Advanced Technology Convergence
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• v.1 no.1
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• pp.1-6
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• 2022

Since 2015, the government has been making efforts to distribute Korean smart farms. However, the supply is limited to large-scale facility vegetable farms due to the limitations of technology and current cultivation research data. In addition, the efficiency and reliability compared to the introduction cost are low due to the simple application of IT technology that does not consider the crop growth and cultivation environment. Therefore, in this paper, data analysis services was performed based on public and external data. To this end, a data-based target smart farm system was designed that is suitable for the situation of farms growing in facilities. To this end, a farm risk information notification service was developed. In addition, light environment maps were provided for proper fertilization. Finally, a disease prediction model for each cultivation crop was designed using temperature and humidity information of facility farms. Through this, it was possible to implement a smart farm data service by linking and utilizing existing smart farm sensor data. In addition, economic efficiency and data reliability can be secured for data utilization.

• Proceedings of the Korea Water Resources Association Conference
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• 2023.05a
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• pp.339-339
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• 2023

2018년도 연강수량은 1,386.9 mm로 평년 수준의 비가 내렸으나, 7-8월에 발생한 폭염 및 가뭄으로 인해 강원, 전남, 경북, 충남 지역에서 밭작물 중심으로 22,767 ha 피해가 발생하였다. 2019년도 연강수량은 1,171.9 mm로 평년보다 약 10% 적은 수준의 비가 내렸으며, 동일시기에 인천, 강원, 충남 지역에서 논·밭작물 중심으로 3,112 ha 피해가 발생하였다. 기후변화로 인해 강수량이 지역별로 편중되어 국지적 가뭄이 빈발하여 지역별로 가뭄의 영향, 피해, 체감 정도가 상이한 양상을 보이고 있다. 가뭄을 사전에 방지하기 위해서는 가뭄 모니터링과 선제적 대응이 중요하며, 현재 가뭄의 특징, 상황 등의 목적에 따라 다양한 형태의 가뭄 모니터링 시스템이 개발되고 있다. 가뭄의 피해와 영향 정도는 지역 간의 차이가 나타나 지역별로 가뭄을 체감하는 정도가 다르기 때문에 하나의 결과로 나타내기에는 어려움이 있다. 따라서, 가뭄의 발생 시기와 확산 정도를 분석하여 특보 발효 시점과 가뭄 대응 방안에 대한 기준 마련이 중요하다. 본 연구는 현대 사회에서 가장 중요한 요소로써 활용되고 있는 빅데이터 중 비정형 데이터로 분류되는 뉴스데이터와 논·밭의 가뭄을 나타내는 농업 가뭄과 관련된 데이터를 활용하여 농업 가뭄의 전조를 파악해보고자 한다. 2018년부터 2019년까지 전국을 대상으로 농업 가뭄에 관한 키워드 선정 후, 웹 크롤링을 통해 뉴스데이터를 수집해 논 가뭄과 밭 가뭄을 구별하여 각 지역에서 최초로 가뭄 기사가 발행된 시기와 지역별 기사의 빈도를 산출하였다. 뉴스데이터의 농업 가뭄 전조 감지 가능성을 파악하기 위해 국가가뭄정보통계집에서 논 물마름 시기와 밭 시듦 시기 자료를 활용하였다. 가뭄 피해 발생시기와 관련 기사 발행 시기 비교, 농업용수 대상 비상용수 지원 자료를 활용하여 실제 농업 가뭄확산 감지 여부를 분석하여 농업 가뭄 관련 뉴스데이터 간의 상관성을 분석하였다.

• The Journal of the Korea institute of electronic communication sciences
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• v.18 no.2
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• pp.355-360
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• 2023

Fire is a disaster that causes irreversible damage to many people due to personal injury and property damage. Various fire detection equipments are installed around us to detect and cope with it quickly. However, due to various problems such as artificial, environmental, and aging, fire detection equipment is activated even though it is not a actual fire, and there are many problems such as delaying the support to the necessary fire scene. In this paper, we analyze the non-fire alarm of the fire detection equipment and propose a system that enables the field staff to check the scene situation through the video as a way to prevent the mobilization due to the misinformation by checking the fire. The purpose of the present invention is to stably cope with a disaster by suggesting a customized automatic guidance system which induces a rapid evacuation by sending an evacuation guidance notification to a range of a fire occurrence neighboring area, and supports a rapid and accurate processing by a rapid dispatch of a firefighter, rather than a wide range of guidance such as an existing emergency disaster guidance letter when it is determined to be an actual fire through the confirmation procedure.

• Journal of the Korea Institute of Building Construction
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• v.23 no.6
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• pp.715-726
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• 2023

This study suggested that protective panels should be installed as sacrificial members as a safety design method for structures with potential explosions such as hydrogen charging stations to minimize direct damage to the structure and have resilience. To this end, the focus of the experiment is on quantitatively evaluating the impact of the structure when the protection panel is installed closely or spaced apart from the structure in a high-speed collision situation of the projectile. The experimental design used steel plates instead of concrete structural members mainly used in the past for excellent reproducibility, and the impact of structural members was compared and analyzed through deformation differences on the back of the steel plate. In addition, the impact of changes in the physical properties of the elastic body used as a separation material for the protective member and the difference in shock wave transmission time according to the protective member and the elastic body on the structural member was investigated.

• Journal of Korean Society of Disaster and Security
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• v.16 no.4
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• pp.85-99
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• 2023

By the social advancement, radiological disaster prevention planning is getting important considering complex disasters as in the Fukushima radiological disaster occurred by a chain of natural disasters. However, it has yet to be suggested the specific prevention plans for the complex disasters in the field of national radiological disaster prevention. This study aims to analyze the types of complex disasters in order to select the ones that are relatively more likely to occur in the domestic environment. It is also to analyze the impact on the radiological disaster prevention by searching damage spread of the classified natural disasters. We provides the necessary criterial for establishing disaster prevention plans through the scenarios for radiological emergency responses based on complex disasters. it is thought that these criteria can help prepare for the worst case scenario and implement effective resident protection.

• Journal of Internet Computing and Services
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• v.22 no.4
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• pp.83-98
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• 2021

The purpose of this study to find the factors influencing the fire alarms using IoT firefighting facility management system data of Seoul Fire & Disaster Headquarters, and to present academic implications for establishing an effective prevention system of fire situation. As the number of high and complex buildings increases and former bulidings are advanced, the fire detection facilities that can quickly respond to emergency situations are also increasing. However, if the accuracy of the fire situation is incorrectly detected and the accuracy is lowered, the inconvenience of the residents increases and the reliability decreases. Therefore, it is necessary to improve accuracy of the system through efficient inspection and the internal environment investigation of buildings. The purpose of this study is to find out that false detection may occur due to building characteristics such as usage or time, and to aim of emphasizing the need for efficient system inspection and controlling the internal environment. As a result, it is found that the size(total area) of the building had the greatest effect on the fire alarms, and the fire alarms increased as private buildings, R-type receivers, and a large number of failure or shutoff days. In addition, factors that influencing fire alarms were different depending on the main usage of the building. In terms of time, it was found to follow people's daily patterns during weekdays(9 am to 6 pm), and each peaked around 10 am and 2 pm. This study was claimed that it is necessary to investigate the building environment that caused the fire alarms, along with the system internal inspection. Also, it propose additional recording of building environment data in real-time for follow-up research and system enhancement.

• Journal of the Korean Society for Aeronautical & Space Sciences
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• v.44 no.10
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• pp.871-876
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• 2016

Abnormal odor similar with burning smell often appears at the cockpit in the beginning of ultra-sonic aircraft without air filter due to the heating of production materials remained at the bleed air duct. Sources of the odor should be removed by burn-in test before test flight in order to prevent pilot confuses order with emergency such as fire of engine. However, the present method cannot prevent abnormal odor completely at the high altitude flight because maximum temperature of flight is higher than it of burn-in-test. This paper suggests burn-in test improved based on the analysis of thermal conditions of high altitude flight. It is verified that the existing burn-in test cannot cover thermal conditions of high altitude flight due to the discontinuous flow control, high change rate of temperature per unit time and difference between limit temperature of condenser and turbine. In order to overcome the limitations of current methods, the new burn-in test with continuous flow control are suggested. The continuous flow control are achieved by ram air inlet control. The effect of suggested method are verified by ground tests and flight tests. The results show the bleed air temperature can cover the temperature of high altitude flight and prevent abnormal odor at the flight test.

• Journal of Radiation Protection and Research
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• v.36 no.3
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• pp.127-133
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• 2011

In 2007, the International Commission on Radiological Protection (ICRP) published Recommendations of the International Commission on Radiological Protection. Accordingly IAEA safety standards committees have reviewed and revised the BSS. The process of the implementation of the ICRP 103 into Korean radiation protection regulations has been continued. Although the new recommendations retain the fundamental protection principles, the impact of the new ICRP recommendations will necessarily be greater than ever before. ICRP recommends the application of dose constraint in planned situations and reference level in existing & emergency situations for strengthening of the principle of optimization. Dose constraints and reference level play a criterion on the level of individual dose as prospective and source-related values. Therefore it is necessary to apply dose constraints and reference levels to all nuclear and RI&RG facilities in Rep. of Korea. Dose constraints and reference level of occupational exposure will be set-up by the stakeholder itself with the cooperation of regulatory body. In this study, the implementation method was discussed to apply the dose constraints and reference level as the procedure for the optimization, not the tool of the regulation.

• Korean Security Journal
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• no.28
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• pp.57-77
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• 2011

Recently, property and life loss is increasing internally and externally, due to fire spread in high-rise buildings which results from a variety of disasters like fire and terror. In this study, therefore, an evacuation simulation was performed to predict escape behaviors of occupants and assess escape safety in high-rise office buildings after setting up each scenario, as part of safety measures for high-rise buildings. Based on the results and data obtained, escape safety was assessed, finally. The results and suggestions of this study are as follows. Firstly, most of the present researches on high-rise building and multiple-use facilities are weighted towards qualitative perspectives. It is, therefore, considered that we have to establish concrete, practical, systematical and rational safety measures to minimize damages in dangerous situations, by analyzing security plans for high-rise buildings in depth and preparing for those situations from various angles. Secondly, setting up evacuation sections in security plans for high-rise buildings is an important factor which influences refuge. Thirdly, in relation to security plans for high-rise buildings, it is possible to reduce the entire time for escape, by setting up escape exits of each floor in consideration of a simultaneous evacuation situation.