Personal, indoor, and outdoor PAH levels are virtually identical during the June August period (mean personal – indoor difference = 0.01 ± 0.93 ng/m; mean personal – outdoor difference = 0.75 ± 1.92 ng/m).
In contrast, the mean personal exposure concentration is higher than the home indoor level and lower than the home outdoor level (mean personal – indoor difference = 10.97 ± 30.66 ng/m; mean personal – outdoor difference = 29.23 ± 28.07 ng/m) between December and March (Jedrychowski et al. 2007).
Stack effect in areas with large indoor and outdoor temperature differences (such as 14 °C indoor and − 30 °C outdoor at Harbin, Heilongjiang, China) will also give high ventilation rate through leakage areas.
Several study, participant, and environment characteristics were associated with an increased r̄ j, including earlier study midpoints, eastern longitudes, lower personal-residential outdoor PM2.5 differences (and ratios), higher mean ages, and higher mean temperatures.
Although the campaign includes old school media like TV, print and outdoor ads, the difference, Ms. Thompson said, is that "traditional is not the core of the campaign, it's part of the campaign".
Research results suggest that: in summer, it's cool with the average indoor air temperature of 19.03 ℃ and the maximum outdoor air temperature difference of 24 ℃.
When the ventilation rate is a function of indoor and outdoor air temperature difference, the thermal mass number and the convective heat transfer air change parameter are suggested.
Through modeling a large amount of cases with a validated model, the factors, e.g. temperature difference, outdoor wind velocity, effective air leakage gaps in the envelopes, the area of the air leakage and the room, were analyzed.
To calculate the lengthwise fit of the indoor and outdoor shoes, the difference between the actual inside length of the shoe and the length of the foot was determined with a precision of one millimetre.
The results indicated that different spatial arrangements of parks exhibited significant differences in outdoor cooling effects.
Further, we evaluated and compared differences in outdoor microclimates and human thermal comfort by simulating different tree layouts (clustered, equal interval, or dispersed) in the same neighborhood.
