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chris cappa Profile picture
chris cappa
@CappaSnappa
Some things air pollution and climate, will like anything with cats, he/him
Mar 29, 2022 • 4 tweets • 2 min read
Excited to see this work by Rachael Dal Porto characterizing a #corsirosenthalbox with @CorsIAQ and others finally published! But there's more... 1/3
tandfonline.com/doi/full/10.10… Since then, we've done a bit more work characterizing other fans, including common Lasko fans. For the CR Boxes (here, w/ 5 filters), CADR nominally scales with sound level. The HEPA we tested gives a much lower CADR for the same sound level. 2/3 Graphs showing the clean ai...
Jan 11, 2022 • 5 tweets • 2 min read
Really excited to share our characterization of a #corsirosenthalbox from @UCDavisCOE and with @CorsIAQ (and others not on twitter, Rachael Dal Porto, Monet Kunz, Theresa Pistochini). Bottom line: they work really well! medrxiv.org/content/10.110… 1/5 Graph showing performance of a Corsi-Rosenthal Box relative The clean air delivery rate ranged from ~600-800 cfm for the CR box depending on speed! Few HEPAs on the residential market come even close.
Jan 27, 2021 • 23 tweets • 8 min read
In #atmoschem, collaborative field & lab campaigns are a great way to move science questions forward. But these studies create challenges for credit and coauthorship. Following conversations with @chemdelphine, here are a few thoughts about collaborative writing #academicchatter 1. In general, err on the side of generosity. People should be rewarded for their efforts. Lab and field measurements take a LOT of work - even operating commercial instruments requires extensive preparation, calibration, troubleshooting, and data analysis.
Aug 20, 2020 • 9 tweets • 4 min read
We tested neck gaiter performance for reducing exhaled particles when worn by a person speaking...results differ quite a bit from a conventional test using manikins (see ). Why? Read on (it's not droplet shattering #gaitergate) 1/n Image When speaking the Rainbow Passage, we observe more particles when wearing this polyester gaiter than without (method: see Asadi et al. 2019/2020). But is this droplet shattering? To test this we "fake read" the same passage but without making any noise & breathing very little 2/n