• 제목/요약/키워드: hazardous factor analysis

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충청지역 집단급식소의 노로바이러스 실태조사와 환경요인의 영향 (Investigation of Norovirus Occurrence and Influence of Environmental Factors in Food Service Institutions of ChungCheong Area)

  • 정우영;엄준호;김병조;윤민호;주인선;김창수;김미라;변정아;박유경;손상혁;이은미;정래석;나미애;육동연;강지연;허옥순
    • 한국식품위생안전성학회지
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    • 제25권2호
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    • pp.153-161
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    • 2010
  • 충청지역권내 지하수를 사용하는 집단급식소의 식품용수 82시료의 norovirus 검출빈도를 조사한 결과 7시료에서 검출 되었으며, 이는 8.5%에 해당 하였다. Norovirus가 검출된 집단 급식소에 대해서는 식중독 발생이 우려됨에 따라 소독, 관정개발, 오염원제거 및 상수도 보급 등의 위생환경 개선과 유지관리가 필요하다. Norovirus의 검출에 영향을 주는 요인으로는 암모니아성질소, 총고형분, 과망간산칼륨 소비량으로 나타났다. Norovirus 양성 검출군과 음성 검출군의 수질특성을 비교한 결과 수소이온농도는 큰 차이가 없었고, 탁도, 암모니아성질소, 일반세균수, 총고형분 항목에 있어서 norovirus 양성 검출군 평균값이 음성 검출군 평균값 보다 높은 값을 나타내었다. Norovirus 검출과 관련성이 높은 환경인자의 지속적인 모니터링을 통해 집단 급식소 식중독예방에 기여할 수 있을 것으로 기대된다.

항만의 위험물 리스크 관리를 위한 요인평가에 관한 연구 (A Study on Factor Evaluation for Risk Management of Hazardous Substance at Port)

  • 윤동하;김선구;최용석
    • 해운물류연구
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    • 제34권4호
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    • pp.565-581
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    • 2018
  • 본 연구는 증가하고 있는 항만 위험물 사고 등과 관련하여 보다 더 안전하고 효율적인 위험물 리스크 관리를 위한 요인 평가를 목적으로 하고 있다. 국내 주요 항만인 부산, 광양, 인천, 울산의 위험물 전문가들을 대상으로 설문조사와 Fuzzy-AHP 방법론을 적용하여 분석을 진행하였다. 총 3개의 측정 영역과 9개의 세부 측정 요인을 선정하였으며, 분석 결과 측정 영역에서는 인적자원(HR) 관리가 가장 중요도(0.445)가 높게 분석되었으며, 환산 가중치를 적용한 세부 측정 요인에서는 관리자 숙련도 확보(0.158), 관리 인원 업무 개선(0.150), 안전교육 강화(0.136)가 우선 순위로 나타났다.

요인분석을 이용한 유해 중금속 복합 노출수준과 건강영향과의 관련성 평가 (Evaluation of the Relationship between the Exposure Level to Mixed Hazardous Heavy Metals and Health Effects Using Factor Analysis)

  • 김은섭;문선인;임동혁;최병선;박정덕;엄상용;김용대;김헌
    • 한국환경보건학회지
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    • 제48권4호
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    • pp.236-243
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    • 2022
  • Background: In the case of multiple exposures to different types of heavy metals, such as the conditions faced by residents living near a smelter, it would be preferable to group hazardous substances with similar characteristics rather than individually related substances and evaluate the effects of each group on the human body. Objectives: The purpose of this study is to evaluate the utility of factor analysis in the assessment of health effects caused by exposure to two or more hazardous substances with similar characteristics, such as in the case of residents living near a smelter. Methods: Heavy metal concentration data for 572 people living in the vicinity of the Janghang smelter area were grouped based on several subfactors according to their characteristics using factor analysis. Using these factor scores as an independent variable, multiple regression analysis was performed on health effect markers. Results: Through factor analysis, three subfactors were extracted. Factor 1 contained copper and zinc in serum and revealed a common characteristic of the enzyme co-factor in the human body. Factor 2 involved urinary cadmium and arsenic, which are harmful metals related to kidney damage. Factor 3 encompassed blood mercury and lead, which are classified as related to cardiovascular disease. As a result of multiple linear regression analysis, it was found that using the factor index derived through factor analysis as an independent variable is more advantageous in assessing the relevance to health effects than when analyzing the two heavy metals by including them in a single regression model. Conclusions: The results of this study suggest that regression analysis linked with factor analysis is a good alternative in that it can simultaneously identify the effects of heavy metals with similar properties while overcoming multicollinearity that may occur in environmental epidemiologic studies on exposure to various types of heavy metals.

요인 및 군집분석을 이용한 유해화학물질 사고 잠재적 피해에 대한 도시 유형 분류 및 특성 분석 (The Analysis and Classification of Urban Types for Potential Damage from Hazardous Chemical Accidents Using Factor and Cluster Analysis)

  • 이승훈;유영은;김규리;백종인;김호현;반영운
    • 한국환경보건학회지
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    • 제46권6호
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    • pp.726-734
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    • 2020
  • Objectives: The aim of this study was to analyze and classify the characteristics of potential damage from hazardous chemical accidents in 229 administrative units in South Korea by reflecting the social and environmental characteristics of areas where chemical accidents can occur. Methods: A number of indicators were selected through preceding studies. Factor analysis was performed on selected indicators to derive factors, and cluster analysis was performed based on the factor scores. Results: As a result of the cluster analysis, 229 administrative units were divided into three clusters, and it was confirmed that each cluster had its own characteristics. Conclusions: The first cluster, "areas at risk of accident occurrence and spread of damage" was a type with a high potential for accident damage and a high density of hazardous facilities. The second cluster, "Urban infrastructure damage hazard areas" appeared to be a cluster with high urban development characteristics. Finally, the third cluster 'Urban and environmental damage hazard areas' appeared to be a cluster with an excellent natural environment. This study went further from the qualitative discussion related to existing chemical accidents to identify and respond to accident damage by reflecting the social and environmental characteristics of the region. Distinct from the previous studies related to the causes of accidents and the response system, it is meaningful to conduct empirical research focusing on the affected areas by analyzing the possibility of accident damage in reflection of the social and environmental characteristics of the community.

어린이 건강관련 유해물질 연구방향 (Chemical Risk Factors for Children's Health and Research Strategy)

  • 이효민;정기화
    • 한국식품위생안전성학회지
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    • 제23권3호
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    • pp.276-283
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    • 2008
  • 국내 외 선행연구결과에 의한 어린이 출생 전 후 건강에 영향을 미칠 수 있는 주요 유해물질은 inorganic arsenic, BPA, 2,4-D, dichlorvos, methylmercury, PCBs, pesticide, phthalate, PFOA/PFOS, vinyl chloride 등으로서 국내에서도 이들을 포함한 확인 연구가 수행되어져야 할 것이다. 또한 어린이들의 행동발달과 연관된 생활환경에서의 다양한 인체노출이 확인됨에 따라 탁아소, 유치원과 같은 경우 어린이 활동공간을 대상으로 환경모니터링 및 위해관리활동도 병행되어야 할 것이다. 또한 어린이 건강에 영향을 미치는 유해물질을 중심으로 독성평가, 인체영향연구, 환경 및 인체모니터링과 위해평가를 수행하므로 유해물질의 원인-상관관계를 확인하고 사실자료에 근거한 관리정책을 반영하는 것이 바람직하다.

가상체적을 이용한 폭발위험장소 구분의 타당성 검토 (Validity Review on Classification of Explosion Hazardous Area using Hypothetic Volume)

  • 임지표;정창복
    • 한국안전학회지
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    • 제29권6호
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    • pp.68-75
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    • 2014
  • It is very important to classify explosion hazardous area (EHA) suitably and to use proper explosion-proof electric installations for facilities using flammable gases and liquids. In the past, various examples in the Notification of Ministry of Employment and Labor were referred to in classifying EHA. But, at present, many companies use the hypothetical volume in Korean Standards (KS). This study reviews the validity of EHA classification based on the hypothetical volume by comparing the calculated radii of EHA with those obtained by a consequence analysis program called PHAST and a mathematical approach in British Standards (BS). The radii of EHA by the hypothetical volume were found to be slightly larger than those by the other two methods. This was attributed to rather conservative uses of a safety factor(k) and a correction factor(f) for availability of ventilation in calculating the hypothetical volume. Since the differences are not so conspicuous, however, it is concluded that the hypothetical volume in KS is a valid means for the classification of EHA. This study also presents a table of the radii of EHA for easy reference by small-scale companies using city gas, C3-LPG and flammable liquid(toluene), respectively. The table consists of 25 leakage scenarios corresponding to combinations of 5 pipe(nozzle) sizes and 5 operating conditions for each flammable gas and liquid.

인화성액체의 폭발위험장소 설정을 위한 증발율 추정 모델 연구 (A Study on the Estimation Model of Liquid Evaporation Rate for Classification of Flammable Liquid Explosion Hazardous Area)

  • 정용재;이창준
    • 한국안전학회지
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    • 제33권4호
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    • pp.21-29
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    • 2018
  • In many companies handling flammable liquids, explosion-proof electrical equipment have been installed according to the Korean Industrial Standards (KS C IEC 60079-10-1). In these standards, hazardous area for explosive gas atmospheres has to be classified by the evaluation of the evaporation rate of flammable liquid leakage. The evaporation rate is an important factor to determine the zones classification and hazardous area distance. However, there is no systematic method or rule for the estimation of evaporation rate in these standards and the first principle equations of a evaporation rate are very difficult. Thus, it is really hard for industrial workplaces to employ these equations. Thus, this problem can trigger inaccurate results for evaluating evaporation range. In this study, empirical models for estimating an evaporation rate of flammable liquid have been developed to tackle this problem. Throughout the sensitivity analysis of the first principle equations, it can be found that main factors for the evaporation rate are wind speed and temperature and empirical models have to be nonlinear. Polynomial regression is employed to build empirical models. Methanol, benzene, para-xylene and toluene are selected as case studies to verify the accuracy of empirical models.

임금근로자의 고용형태에 따른 건강수준의 차이 분석 - 유해위험요인 노출을 경유한 영향 경로 - (Analysis of health inequality by the type of employment on health among employees - Pathway of the effect via the exposure of hazardous factors -)

  • 이경용
    • 대한안전경영과학회지
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    • 제16권2호
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    • pp.81-90
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    • 2014
  • Flexible production system has been expanded to all sectors of economy with the change of labor market and diversification of employment. The unstable employment with irregular work has replaced stable employment with regular work. This study has investigate the impact pathway of the type of employment on health status especially ill-health symptoms experiences. Among the first Korean Working Conditions Survey data, the employee's response data was used to analyze the path way with multiple regression analysis. The result has shown the direct effect of the type of employment on ill-health symptoms experience. Indirect effect of the type of employment was found the pathway via the exposure to noise, high temperature, low temperature, dust, skin contact to chemicals, painful posture, heavy material handling, standing position, repetitive movement of hands. However the exposure to the other hazardous factors such as organic solvent, wholebody vibration, radiation, lifting people, infectious materials were not influenced by the type of employment.

학교 안전교육의 성별 정책 중요도에 관한 AHP 분석 (A Study on Criteria for Handling Hazardous Chemicals)

  • 김회춘;한경수;김근옥;전진우;이배화;이인복
    • 한국위험물학회지
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    • 제6권2호
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    • pp.30-38
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    • 2018
  • This study analyzed the gender factors and priorities that are on the basis for establishing the school safety education policy according to the times when the demand for customized education is increasing. AHP analysis method was used in the paper for systematic and hierarchical analysis. We had checked a safety education specialist group to identify the priorities of important factors to improve the efficiency of analysis. The male group first considered the change of the beneficiary by policy guidelines, and the female group regarded the change of interest and public opinion as important. This has studied the difference in approach between the two groups, although the key elements of the detailed policy are the same. This study suggests that school safety education is effective in improving effective gender safety education response capacity and ensuring substantive policy sustainability.