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We considered the following variables as potential risk factors of personal PAH exposure: residence in the city center, ambient temperature, wind speed, ETS exposure, frequency of exhaust fan use, residence near an industrial plant, commute by tram, apartment height (floor), home heating fuel of coal or wood, time spent outdoors (hour/day), and simultaneously monitored outdoor concentration.
Additionally, respondents who reported cooking with a gas stove were also asked "Is there an exhaust fan near this stove that sends fumes outside the home (yes/no)?" Respondents that answered yes were asked about frequency of exhaust fan usage (never, rarely, sometimes, or always) [ 52].
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A comparative study of the performance of different schemes used to solve one-dimensional gas flow equations when applied to the computation of the frequency response of exhaust mufflers is presented.
In a recent study of the yellow fever vaccine YF-17D in volunteers from Uganda and Switzerland, Ugandan volunteers demonstrated higher frequencies of exhausted and activated NK cells, differentiated T and B cells, and proinflammatory monocytes at baseline, indicating immune activation [ 30].
Measurements show that, for a given flow rate, the intensification of the heat transfer due to the flow intermittency corresponds to the eigen frequency of the exhaust pipe.
In many cases, the tone at the fan blade passing frequency is characterized by a frequency above the first mode cut on frequency of the exhaust stack and both its amplitude and the frequency are time varying.
Some participants gave responses that did not fit into the key word themes of any other participants; these were recorded as new themes at a frequency of one to exhaust all possible themes.
The frequency and depth of the modulation are related to the fundamental firing frequency, the firing frequency of the engine and exhaust manifold design.
Experiments were made to validate the theoretical analysis; results showed that an exhaust decoupler and a vent pipe can affect the frequency of the pulse combustor and the pressure in the exhaust decoupler (both amplitude and phase).
There is no smell of exhaust or fuel.
opening duration angle of exhaust valve.
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Justyna Jupowicz-Kozak
CEO of Professional Science Editing for Scientists @ prosciediting.com