• 한국입자에어로졸학회지
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• 제16권4호
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• pp.73-94
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• 2020

Particulate infectious sources, including infectious viruses, can float in the air, causing airborne infections. To prevent indoor airborne infection, dilution control by ventilation and indoor air cleaners are frequently used. In this study, the risk of airborne infection by the operation of these two techniques was evaluated. In case of dilution control by ventilation, a high efficiency air filter was embedded at the inlet of supply air. In this study, infectious source reduction devices such as indoor air cleaner include all kinds of mechanical-filters, UV-photo catalysts and air ionizers through which air flow is forced by fans. Two mathematical models for influenza virus were applied in an infant care room where infants and young children are active, and the risk reduction efficiency was compared. As a result, in the case of individually operating the ventilator or the infectious source reduction device, the airborne infection risk reduction efficiencies were 55.2~61.2% and 53.8~59.9%, respectively. When both facilities were operated, it was found that the risk of airborne infection was reduced about 72.2~76.8%. Therefore, simultaneous operation of ventilation equipment and infectious source reduction device is the most effective method for safe environment that minimizes the risk of airborne infection of respiratory infectious diseases. In the case of a space where sufficient ventilation operation is difficult, it was found that the operation of an infectious source reduction device is important to prevent the spread of infectious diseases. This study is meaningful in that it provides an academic basis for strategies for preventing airborne infection of respiratory infectious diseases.

• 인터넷정보학회논문지
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• 제16권6호
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• pp.57-67
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• 2015

This paper proposes an Fuzzy-based Risk Reasoning Driving Strategy on VANET. Its first reasoning phase consists of a WC_risk reasoning that reasons the risk by using limited road factors such as current weather, density, accident, and construction, a DR_risk reasoning that reasons the risk by combining the driving resistance with the weight value suitable for the environment of highways and national roads, a DS_risk reasoning that judges the collision risk by using the travel direction, speed. and distance of vehicles and pedestrians, and a Total_risk reasoning that computes a final risk by using the three above-mentioned reasoning. Its second speed reduction proposal phase decides the reduction ratio according to the result of Total_risk and the reduction ratio by comparing the regulation speed of road to current vehicle's speed. Its third risk notification phase works in case current driving speed exceeds regulation speed or in case the Total_risk is higher than AV(Average Value). The Risk Notification Phase informs rear vehicles or pedestrians around of a risk according to drivers's response. If drivers use a brake according to the proposed speed reduction, the precedent vehicles transfers Risk Notification Messages to rear vehicles. If they don't use a brake, a current driving vehicle transfers a Risk Message to pedestrians. Therefore, this paper not only prevents collision accident beforehand by reasoning the risk happening to pedestrians and vehicles but also decreases the loss of various resources by reducing traffic jam.

• 한국안전학회지
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• 제29권1호
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• pp.64-69
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• 2014

Community-based disaster preparedness approaches are increasingly important elements of vulnerability reduction and disaster strategies. They are associated with a policy trend that values the knowledge and capacities of local people. In this research, we describe the community diagnosis method and develop Flood Disaster Risk Reduction Index(FDRRI) for assessment of flood vulnerability. FDRRI is composed of four indicators such as Flood Exposure Indicator(FEI), Sensitivity Indicator(SI), Risk Reduction Indicator(RRI), and Community Preparedness Indicator(CPI). We anticipate to present the guideline for selection national preparedness projects and uplift community's preparedness capacity.

• 한국콘텐츠학회논문지
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• 제21권12호
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• pp.250-263
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• 2021

본 연구는 항공사를 이용하는 고객들이 코로나19라는 감염병 인식과 감염병에 대한 지각된 위험이 위험감소행동과 관광지 전환의도에 미치는 영향관계를 분석하고자 실시하였다. 2021년 6월 2일부터 24일까지 일년 이내에 항공기를 이용한 여행 경험이 있는 소비자를 대상으로, 온라인을 통해 설문을 실시하였다. SPSS 20.0과 AMOS 23.0 통계 프로그램을 활용하였고, 유효한 250부의 설문으로 분석을 실시하였다. 연구의 결과는 첫째, 코로나19의 감염병 인식은 지각된 위험에 유의한 영향을 미치는 것으로 나타났다. 둘째, 코로나19의 감염병 인식은 위험감소행동에 유의한 영향을 미치는 것으로 나타났다. 셋째, 코로나19의 지각된 위험은 위험감소행동에는 유의한 영향을 미치는 것으로 나타났다. 넷째, 코로나19의 지각된 위험은 관광지 전환의도에는 영향을 미치지 못하는 것으로 나타났다. 다섯째, 위험감소행동은 관광지 전환의도에 유의한 영향을 미치는 것으로 나타났다. 본 연구를 통해 코로나19 감염병에 대한 항공사 고객들의 인식을 통해 감염병에 대한 위험과 위험감소행동과 관광지 전환의도에 대한 관계를 실증적으로 규명하고 분석하고자 하였다. 코로나19의 장기적인 위기 속에서 외부 변수에 취약한 관광산업이 이에 대한 대응방안을 모색해야 할 것이다.

• 대한안전경영과학회지
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• 제6권2호
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• pp.91-101
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• 2004

Consumers require various quality characteristics including safety. The reduction of risk concerned on product safety becomes an urgent issue in leading companies. The strategy for customer satisfaction by choosing attractive quality characteristic is not enough for risk reduction in view of producer. This paper presents a method for choosing quality characteristics and risk characteristics by integrating QFD based on quality requirements and AHP based on safety requirements, also shows its application for complex equipment.

• 한국재난관리표준학회지
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• 제1권3호
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• pp.69-76
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• 2008

본 연구는 철도를 통한 위험물 운송시 발생할 수 있는 위험을 정량화하는 방법을 개발하고, 이를 통한 경감대책을 제시한다. 본 논문에서는 철도위험물 수송에 관한 위험도를 평가하기 위한 방법으로 정량적 위험도 평가 방법을 채택하였으며, 과거 사고이력과 더불어 위험이 높을 것으로 판단되는 익산시를 대상으로 했다. 노출인원에 대한 평균개인의 위험을 거리에 따른 위험도로 표현한 결과 원자력 기준 미만으로 안전한 것으로 판단되고, 또한 사회적 위험도로 표현한 결과, 위험경감대책 적용요구 구간(ALARP)범위 내에 포함되어 이에 대한 경감대책을 제시하였다. 위험 경감대책으로 차량설계, 운영, 피해확대 방지, 발생빈도 감소를 위한 탈선사고 방지, 경로변경 방안 등을 제시하였으며 경감대책의 적용으로 높은 수준의 안전성을 확보할 수 있을 것으로 기대된다.

• Journal of Preventive Medicine and Public Health
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• 제50권6호
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• pp.401-410
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• 2017

Objectives: The purpose of this study was to examine the associations of childbirth, breastfeeding, and their interaction with breast cancer (BC) risk reduction, and to evaluate the heterogeneity in the BC risk reduction effects of these factors by menopause, hormone receptor (HR) status, and pathological subtype. Methods: BC patients aged 40+ from the Korean Breast Cancer Registry in 2004-2012 and controls from the Health Examinee cohort participants were included in this study after 1:1 matching (12 889 pairs) by age and enrollment year. BC risk according to childbirth, breast-feeding, and their interaction was calculated in logistic regression models using odds ratios (ORs) and 95% confidence intervals (CIs). Results: BC risk decreased with childbirth (3+ childbirths relative to 1 childbirth: OR, 0.66; 95% CI, 0.56 to 0.78 and OR, 0.80; 95% CI, 0.68 to 0.95 in postmenopausal and premenopausal women, respectively); and the degree of risk reduction by the number of children was heterogeneous according to menopausal status (p-heterogeneity=0.04), HR status (p-heterogeneity<0.001), and pathological subtype (p-heterogeneity<0.001); whereas breastfeeding for 1-12 months showed a heterogeneous association with BC risk according to menopausal status, with risk reduction only in premenopausal women (p-heterogeneity<0.05). The combination of 2 more childbirths and breastfeeding for ${\geq}13$ months had a much stronger BC risk reduction of 49% (OR, 0.51; 95% CI, 0.45 to 0.58). Conclusions: This study suggests that the combination of longer breastfeeding and more childbirths reduces BC risk more strongly, and that women who experience both 2 or more childbirths and breastfeed for ${\geq}13$ months can reduce their BC risk by about 50%.

• 대한안전경영과학회:학술대회논문집
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• 대한안전경영과학회 2004년도 춘계학술대회
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• pp.137-144
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• 2004

Consumers require various quality characteristics including safety. The reduction of risk concerned on product safety becomes urgent issue in leading companies. The strategy for customer satisfaction by choosing attractive quality characteristic is not enough for risk reduction in view of producer. This paper presents a method for choosing quality characteristics and risk characteristics by integrating QFD based on quality requirements and AHP based on safety requirements, also shows its application for complex equipment.

• 한국가스학회지
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• 제14권4호
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• pp.18-23
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• 2010

이 논문에서는 실제 설치예정인 도시가스 고압배관에 대하여 정량적 위험성 평가를 실시하고, 평가 결과 위험이 허용영역 밖에 위치하는 경우에는 위험경감조치를 도출하였다. 또한, 도출한 위험경감조치별 위험감소율을 계산하였다. 정량적 위험성 평가결과, 복사열에 의한 사고피해거리는 바람의 속도와 대기안정도에 따라 크게 좌우됨을 알 수 있었다. 위험감소율이 가장 큰 조치는 배관의 부식관리, MOV 설치 및 타공사로 인한 배관손상방지조치를 모두 이행하도록 하는 10번 조치로서 75%의 위험감소효과가 있었다.

• 자원ㆍ환경경제연구
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• 제12권1호
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• pp.49-74
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• 2003

This study used a slightly modified version of contingent valuation questionnaire designed and developed by Krupnick et al.(2000) to estimate the value of mortality risk reduction for environmental policy. Because that environmental policy, especially air pollution policy with some latency main effect on mortality risk reduction of old people with some latency period, respondents were asked about their current WTP for 5/1,000 mortality risk reduction being to take place beginning at 70 over the course of ten years. The annual mean WTP is 233,370 won (standard error 32,570 won) in spike/continuous/interval data model. The implied VSL is 466 million won. The 95% confidence interval is 339 million won~594 million won.