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- W4234582036 abstract "Individual exposure to air pollution is associated with several time and location specific factors like ambient air pollution, meteorology, environmental conditions or activities. Our investigation aims at the description and identification of factors determining personal exposure to particle number concentration (PNC) in everyday situations. In a validation study of the Augsburger Umweltstudie in 2011, PNC and particle mass concentrations of various particle sizes and black carbon were collected at a central measurement site. Additionally, ten volunteers recorded their personal exposure to PNC, meteorological parameters, their activities and whereabouts. Measurement campaigns were conducted in three different seasons, each lasting three weeks. Each individual accomplished three scenarios within five to six hours, which include both indoor and outdoor microenvironments in everyday situations. A two-stage approach allowed us to separate the background exposure from the activity effects. Background exposure was modelled with semi-parametric regression and variable selection via boosting. In the second step, the effects of the activities were calculated adjusting for the background exposure from the first step. Separate models were calculated for indoor and outdoor exposure and for the different seasons. Personal indoor exposure exhibited strong individual specific variation; PNC levels were magnified through smoke of candles by 12.6 or through cooking activities by 8.7. In spring, ambient temperature and exposure showed relevant effects. Outdoor personal exposure was mainly influenced by ambient exposure levels; dew point temperature showed a negative almost linear effect in winter. Public transport was figured out as the means of transport with the lowest personal PNC levels, followed by pedestrian and car. The complex modelling strategy enabled the simultaneous examination of the ambient and individual specific influencing factors of personal exposure to PNC." @default.
- W4234582036 created "2022-05-12" @default.
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- W4234582036 date "2013-09-19" @default.
- W4234582036 modified "2023-09-28" @default.
- W4234582036 title "Data-driven flexible modelling approach for the personal exposure to particle number concentration" @default.
- W4234582036 doi "https://doi.org/10.1289/isee.2013.o-1-10-04" @default.
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