This study aims to identify job stress of firemen and the relations between their job stress, depression and fatigue, targeting firemen who are working for local fire stations. We interviewed the subjects using a short-answer type questionnaire or a online questionnaire. The data collected were analysed with a use of SPSS WIN 15.0 for confidence analysis, correlation analysis, step-by-step multi-regression analysis, and covariance structure analysis(CSA). This study result tasks and emotional stress had a direct effect on depression and fatigue. Therefore, this study suggests that governmental management should be provided for firemen that are classified as a high-risk group in occupational characteristics. Above all, the causes of stress should be diagnosed, its management goals should be set, and effective intervention programs should be provided.
The collection of TSP and PM 2.5 aerosols has been made at the Gosan Site of Jeju Island during 2008-2011, and their ionic and elemental species were analyzed, in order to examine the seasonal variation and characteristics of aerosol compositions. The anthropogenic components (NH 4 + + , nss-SO 4 2-, NO 3-, S, Zn, Pb) and the soil components (nss-Ca 2+ + , Al, Fe, Ca) showed high concentrations in spring as the prevailing westerly wind, but the concentrations of the sea-salt components (Na + + , Cl-) were high in winter. In TSP, the neutralization by NH 3 increased in summer, but the neutralization by CaCO 3 increased in spring and fall seasons. The organic acids (HCOO-, CH 3 COO-) contributed to the acidification of the aerosols by only 5.0%, so the acidification could be mostly contributed by the inorganic acids (SO 4 2-, NO 3-). From the examination of the source origins by factor analysis, the compositions of TSP were influenced by the order of soil¤anthropogenic¤marine, on the other hand, those of PM 2.5 were by the order of an-thropogenic¤marine¤soil. The backward trajectory analyses showed that the concentrations of NH 4 + + , nss-SO 4 2-, NO 3 and nss-Ca 2+ + increased highly when the air masses had moved from China continent into Gosan area of Jeju Island.
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