• 한국안전학회지
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• 제26권6호
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• pp.7-12
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• 2011

In recent years, environmental concerns have been raised on the use of poorly biodegradable fluids in electrical apparatus in regions where spills from leaks and equipment failure could contaminate the surroundings. The newly invented vegetable insulating oil is highly biodegradable and have negligible impact on the environment, human health and the ecosystem. For development of the environmental-friendly pole transformer using vegetable insulating oil, the dielectric constructions of the pole transformer were discussed in this paper. Depending on the dielectric constructions, the AC breakdown characteristics of the Nomex insulating papers and the vegetable insulating oil were studied by simulated electrode systems. Based on the experimental results, the maximum design stress($E_{max}$) for insulation design of the environmental-friendly pole transformer were suggested.

• 한국안전학회지
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• 제25권6호
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• pp.81-85
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• 2010

In recent years, environmental concerns have been raised on the use of poorly biodegradable fluids in electrical apparatus in regions where spills from leaks and equipment failure could contaminate the surroundings. The vegetable insulation oils are highly biodegradable, have negligible effect on the environment, human health and ecosystem. Therefore, to assure their safe use in electrical power systems, it may require some processing and modification to improve some of their physical, chemical, thermal and electrical properties. This paper provides a comparative results of the electrical breakdown properties of several vegetable insulation oils and mineral oil to use as dielectric fluid in environmental-friendly pole transformer. Also, the electrical breakdown property of the Nomex and kraft insulation papers in vegetable insulation oil is examined.

• 대한안전경영과학회지
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• 제19권4호
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• pp.87-94
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• 2017

The purpose of this study is to provide basic data to help ensure the safety and enhance industrial competitiveness of plant construction projects by analyzing the safety management status of, mainly, chemical engineering plant construction projects, and proposing specific measures and models to reduce human/educational, technical/systemic, institutional disasters. This study was done using literature research and case study/empirical study methods. The results of this study are summarized as follows. First, we classified the major disasters from the quarterly released 'major diaster cases in construction business' from Korea Occupational Safety and Health Agency according to the type of construction and presented the causes and prevention measures.

• 한국정보통신학회논문지
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• 제21권2호
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• pp.386-394
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• 2017

FANET은 무인 항공기들로 구성된 애드혹 네트워크로서, 무인 항공기 간의 데이터 전달을 위해 3차원 상에 형성된 네트워크이다. 현재까지 이루어진 대부분의 FANET 활용에 대한 연구는 무인항공기에 장착된 카메라 센서를 활용하여 지상으로부터 데이터를 수집하고, 이를 전달하고 처리하여 특정한 목적에 활용하는 것이다. 하지만 인간 신체 영역의 데이터를 수집하고 이를 FANET을 통해 전달하는 WBAN과 FANET의 융합에 관한 연구는 아직 많이 이루어지 않았다. 따라서 본 연구는 데이터 전달을 위한 통신체계가 잘 갖추어져 있지 않은 도서 또는 오지 지역에서 활동하는 사람들의 인체 데이터를 수집하기 위해 WBAN을 구성하고, 수집된 데이터를 FANET을 통해 전달하는 체계를 연구한다. 특히 WBAN과 FANET의 융합 네트워크에서 신체의 응급데이터를 전달하기 위한 가능한 데이터 전달방법을 분석하고, 효율적으로 데이터를 전달할 수 있는 전송 모델을 제안한다.

• 대한안전경영과학회지
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• 제15권3호
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• pp.37-50
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• 2013

It is not an exaggeration to say that modern chemicals take a leading place in our life, and people live with the chemicals, having a huge impact on their daily life. The chemical industry in South Korea, ranked seventh in the world, is one of the key industries that are forming greater part of Korean economy. The actual state of the chemical industries, however, is that over 14 tons of hazardous chemicals are being discharged annually and threaten people's lives with a lack of knowledge of its potential danger. In this way, not only beneficial to us, some of these substances, All chemicals, but also present a threat fundamentally our living environment to hazards to human health and the environment, accidents such chemicals, unlike accidents general understanding the scale of damage and propagation velocity has a complex very difficult risk profile, that can occur during deployment of an accident type is also very diverse. Is the actual situation of public concern against harmful chemicals management's is amplified by the chemical accident in the wake such accidents, government and corporate and reactive system and management system prior to the chemical accident the need for communication to exchange ideas with each other between residents, providing information is important. Therefore, the government departments and corporations, which manage variety of chemicals, ought to contribute toward a development of national security by rigid control over the Hazardous chemicals.

• International Journal of Safety
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• 제11권2호
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• pp.15-21
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• 2012

This paper is aimed to develop an electrical fire detection system (EFDS) which can analyze the possibility of electrical fire for overcurrent, leakage current and arc signals of panel board in traditional market shop. The EFDS adopted fuzzy logic and precursory data for overcurrent, leakage current and arc signals to evaluate the possibility of electrical fire. The signals are obtained directly from panel board in traditional market shops and fuzzy membership function is obtained from experiment, simulation, expert's advice. The overcurrent data is acquired by thermal data of normal and abnormal states (partial disconnection) on the insulated electrical wire, in accordance with the increase of the current signal, The leakage current data is obtained under various environments. The arc signal is acquisited by waveforms of instantaneous value in time domain and frequency band in frequency domain. The Fuzzy algorithm for DB of EFDS consists of fuzzification, inference engine by Mamdani's method and defuzzification by center of gravity method. In order to verify the performance and reliability of EFDS, it was applied to Jeon-Ju traditional market shops (90 shops) in Korea. Results show that EFDS in this paper is useful in alarming the fire case, which will prevent severe damage to human beings and properties, and reduce the electrical fires in a vulnerable area of electrical disaster.

• 한국재난정보학회 논문집
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• 제4권2호
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• pp.40-50
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• 2008

The purpose of this study is to analyze the job of the security and secretary, to offer useful basic data throughout human resources management by withdrawing the ability required from the security and secretary based on the analyzed results. In this regard, this study intended to look into the job of the security and secretary, the necessary ability for the job of the security and secretary. To achieve the research goals, the study selected the research participants, composed of 5 secretaries for security with more than 5-year careers after graduating from a security and secretarial service department in a college and conducted an in-depth interview with them concerning their jobs. The in-depth interview data from the 5 participants was applied with a classification analysis used by Spradley (1980). In order to enhance the dependability and validity of the research, the study held an expert meeting composed of 2 persons with a doctoral degree in securities service studies and 1 person with a master's degree in secretarial information studies, twice. Also, the study drew results concerning the job of the security and secretary and the necessary ability of the job. Though the above process, the following conclusions were drawn; the job of the security and secretary includes the areas of job safety, a housing residence job, a health care job, an interpersonal relationships job, an assistant' s job, document and office works, general affairs, and an education job. The necessary ability for the job of the security and secretary involves martial arts abilities, risk management ability, the strict keeping of secrets, decision-making ability, information processing ability, foreign language proficiency, understanding other cultures, communications skills and office work ability.

• 한국재난정보학회 논문집
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• 제1권1호
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• pp.3-26
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• 2005

In recent years, there is growing concern about the potential use of biological agents in war or acts of terrorism accompanied an increased realization that rapid preparedness and response are needed to prevent or treat the human damage that can be caused by these agents. The threat is indeed serious, and the potential for devastating numbers of casualties is high. The use of agents as weapons, even on a small scale, has the potential for huge social and economic disruption and massive diversion of regional and national resources to combat the threat, to treat primary disease, and to clean up environmental contamination. Biological weapons are one of weapons of mass destruction (or mass casualty weapons, to be precise. since they do not damage non-living entities) that are based on bacteria, viruses, rickettsia, fungi or toxins produced by these organisms. Biological weapons are known to be easy and cheap to produce and can be used to selectively target humans, animals, or plants. Theses agents can cause large numbers of casualties with minimal logistical requirements (in wide area). The spread of disease cannot be controlled until there is awareness of the signs of infection followed by identification of agents; and if the organism is easily spread from person to person, as in the case of smallpox, the number of casualties could run into the tens of thousands. Biological weapons could be used covertly, there can be a lot of different deployment scenarios. A lot of different agents could be used in biological weapons. And, there are a lot of different techniques to manufacture biological weapons. Terrorist acts that make use of Biological Agents differ in a number of ways from those involving chemicals. The distinction between terrorist and military use of Biological Weapon is increasingly problematic. The stealthy qualities of biological weapons further complicate the distinction between terrorism and war. In reality, all biological attacks are likely to require an integrated response involving both military and civilian communities. The basic considerations when public health agencies establish national defence plan against bioterrorism must be 1) arraying various laws and regulations to meet the realistic needs, 2)education for public health personnels and support of concerned academic society, 3)information collection and cooperative project with other countries, 4)Detection and surveillance(Early detection is essential for ensuring a prompt response to biological or chemical attack, including the provision of prophylactic medicines, chemical antidotes, or vaccines) and 5) Response(A comprehensive public health response to a biological or chemical terrorist event involves epidemiologic investigation, medical treatment and prophylaxis for affacted persons, and the initiation of disease prevention or environmental decontamination measures). The purpose of this paper is providing basic material of preparedness and response for biological terrorism in modern society.

• 대한불안의학회지
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• 제14권1호
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• pp.44-52
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• 2018

Objective : The present study had examined the psychiatric symptoms and physical health consequences for the bereaved parents of the high school students who died in the 2014 Sewol ferry accident. Methods : Forty bereaved parents participated in the study. The authors administered self-report questionnaires about the parents' health behaviors and psychiatric symptoms. The authors also conducted laboratory tests to assess the parents' physical health at 18 and 30 months after the accident. Univariate descriptive statistics were performed to report the prevalence and severity of psychiatric symptoms and health-related behaviors. Paired t-test and Mcnemar test were performed to compare the 18-and 30-month findings. Correlation analysis between psychiatric symptoms and laboratory findings were performed to find a relationship between the two variables. Results : At 30 months after the accident, most of the bereaved parents still appeared to suffer from complicated grief (97.5%), post traumatic stress disorder (80%), insomnia (77.5%) and severe depression (62.5%) based on the scores on the Inventory of Complicated Grief (ICG), the PTSD Check List-5 (PCL-5), the Insomnia Severity Index (ISI) and the Patient Health Questionnaire-9 (PHQ-9). One quarter of the bereaved parents reported high-risk drinking, and 47.5% reported increased drinking amount and frequency after the accident. In objective laboratory results, 55% of the bereaved parents were obese as defined by body mass index ${\geq}25$. The parents' mean low-density lipoprotein shows a significant increase over time (118.5 mg/dL at 18 months. vs. 132.5 mg/dL at 30 months. paired t-test t=-4.061, $$p{\leq_-}0.001$$). Total cholesterol and low-density lipoprotein at 30 months after the accident were in clinically borderline high range. In correlation analysis, triglyceride was positively correlated with ISI. Conclusion : The loss of children in the Sewol ferry accident, a disaster caused by human error, continued to have considerable impact on the victims' parents' mental and physical health 18 and 30 months after the accident. A longitudinal study following the parents' physical health would be necessary to investigate the long-term effects of this traumatic experience on physical health.

• 산업과 과학
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• 제2권4호
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• pp.1-10
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• 2023

본 연구는 호텔종사자의 코로나19 위험인식과 정신건강 간의 관계에서 직업불안정의 매개효과를 검증하고자 하였다. 이를 위하여 호텔종사자 633명에게 코로나19 위험인식, 직업불안정, 우울, 불안, 신체화 증상의 질문지를 시행하였다. 수집된 자료는 SPSS 25.0 프로그램과 PROCESS Macro 프로그램을 활용하여 분석하였다. 주요 결과는 다음으로 요약할 수 있다. 1. 직업불안정 위험군은 정상군과 비교하여 정신건강 위험(우울, 불안, 신체화 증상) 수준이 유의하게 높았다. 2. 코로나19 위험인식은 직업불안정과 정신건강(우울, 불안, 신체화 증상)에 유의한 영향을 나타냈다. 3. 코로나19 위험인식과 정신건강(우울, 불안, 신체화 증상)간의 관계에서 직업불안정의 부분매개효과가 나타났다. 이러한 결과를 근거로 호텔종사자들이 코로나19 대유행과 같은 재난 상황에서 정신건강 취약성을 가지고 있고, 코로나19가 초래한 직업불안정으로 인하여 정신건강 위험성이 더 증가함을 논의하였다. 호텔종사자들을 위한 인적자원 관리 방안 및 심리 프로그램을 지원할 필요성을 제안하였다.