English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Tools annual

Global: Zendy Free Plan

Global: Zendy Tools monthly

Global: Zendy Plus monthly

Ultrafine vehicular particle (<100 nm) number size distributions presented in theliterature are mostly averages of long scan-time (~30 s or more)spectra mainly due to the non-availability of commercial instruments thatcan measure particle distributions in the <10 nm to 100 nm range faster than 30 s even though individual researchers havebuilt faster (1–2.5 s) scanning instruments. With the introduction of theEngine Exhaust Particle Sizer (EEPS) in 2004, high time-resolution (1 full32-channel spectrum per second) particle size distribution data becomepossible and allow atmospheric researchers to study the characteristics ofultrafine vehicular particles in rapidly and perhaps randomly varying highconcentration environments such as roadside, on-road and tunnel. In thisstudy, particle size distributions in these environments were found to varyas rapidly as one second frequently. This poses the question on the generality of usingaverages of long scan-time spectra for dynamic and/or mechanistic studies inrapidly and perhaps randomly varying high concentration environments.One-second EEPS data taken at roadside, on roads and in tunnels by a mobileplatform are time-averaged to yield 5, 10, 30 and 120 s distributions toanswer this question

On the time-averaging of ultrafine particle number size spectra in vehicular plumes