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Dr. Richard Corsi Profile picture
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9 Aug, 7 tweets, 5 min read
1/ Still packing office @Portland_State in prep for new role as Dean of @UCDavisCOE. Only 3 yrs, but so many wonderful memories of extraordinary staff and faculty, and amazing students and alumni. A few images.
2/ At my 1st townhall meeting w/ faculty and staff, CS Professor Maier gave me a helmet he modified to symbolize my transition from Longhorn to Viking. Many past or present @ut_caee Longhorns were photographed donning this helmet.
3/ The staff of the Maseeh College are extraordinary, so hard working and committed, the gears that keep the college running from hour to hour and day to day. And a lot of fun, too!
4/ Maseeh College students are amazing. A large fraction are 1st generation college students and we have wonderful international students as well. And they are a lot of fun, too!
5/ The Maseeh College has a lot of extraordinary faculty members. I am so very proud of our early-career faculty members who are deeply committed to teaching, broadening participation, & impactful research (4 NSF CAREER Awards in 2 yrs!). And fun, too!
6/ And amazing alumni.
7/ More Portland State and Portland to come ....

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More from @CorsIAQ

Dr. Richard Corsi Profile picture
10 Aug
1/ Hearing a lot of concern about return to campus from faculty & staff at universities across the US. I wrote about this way back in spring and summer of 2020. Here we go again. Some advice here for those in states with leaders who value science and logic.
2/ If the university is open or partially open this fall, my advice is to reverse course on loosening of risk reduction interventions (and make this clear to the campus community as soon as possible).
3/ Enforce the vaccination requirement to the extent possible. It is not possible to verify at some universities relying on attestation. In those cases, employ daily reminders and signs across campus that reinforce why universal vaccination is critical for the community.
Read 15 tweets
Dr. Richard Corsi Profile picture
8 Aug
1/ Even mediocre masks have a significant benefit if EVERYONE wears one. Everyone is needed to assure those infected are wearing one, too. Consider the following relatively mediocre mask (or poor fit on good masks) scenario.
2/ Assume everyone in an indoor space wears a mask that is only 40% efficient, i.e., 40% efficient at reducing emissions from an infected person & 40% efficient at reducing uptake by a receptor. What's the net benefit to those who are susceptible?
3/ 40% + (0.4 x 60%) = 64%. Just having everyone wearing mediocre masks (or better masks with poor fit) leads to a 64% reduction in inhaled dose of virus-laden aerosol particles. Lowering inhaled dose this much may stave off infection and save lives.
Read 8 tweets
Dr. Richard Corsi Profile picture
8 Aug
1/ Motivation for caring about indoor air quality

Prior to this pandemic, the average American lived to be 79 yo (lower now). Of those 79 years we spend, on average, 69 years domiciled inside buildings.
2/ An amazing 54 years are spent INSIDE of our homes. Approximately 26 years are spent lying horizontally on a mattress (perhaps breathing in toluene diisocyanate from your pillow).
3/ The sleep microenvironment remains understudied, but proud of our work done @ut_caee (numerous papers published w/ one more in the queue on controlling particles in breathing zone while sleeping).
Read 14 tweets
Dr. Richard Corsi Profile picture
5 Aug
1/ Aware that one school district hired a consulting firm to do CO2 measurements in classrooms when no students (at all during the day - U*G*G*H*H) were present and concluded the rooms are well ventilated. This makes no sense, folks. This makes no sense. Wasted money.
2/ Aware that in another case a school district did CO2 "spot checks" for a few minutes in classrooms. This often happens if a firm wants to measure CO2 in all classrooms and is limited in instruments and time.
3/ Time-averaged values during entire occupied periods can be improtant and "spot checks" can be woefully deceiving depending on when collected.
Read 11 tweets
Dr. Richard Corsi Profile picture
3 Aug
1/ Here is one way to do a quick & dirty test of leakage around mask. Place several small mirrors or reading glasses in the fridge for 2 to 3 min. Avoid putting them in the freezer, as they will get too cold and you will get condensation on lenses when you remove it.
2/ Take first one out and place it directly in from of mask. As you breathe, the high water vapor content of your warm breath will condense on the lens, a good thing as it shows air going through mask.
3/ Now take out a second pair of glasses and put at edge of mask near chin, nose crease, or cheeks. You want to see as little, and preferably no, condensation as possible. In example below I purposely tweaked seal around nose to yield a small amount of condensation.
Read 10 tweets
Dr. Richard Corsi Profile picture
30 Jul
1/ K-12 schools open in a few weeks. We did not do the right thing over a year ago to prepare schools to significantly reduce inhalation dose of aerosol particles that convey SARS-CoV-2. Most schools are not doing the right thing. We seem wholly paralyzed as a nation.
2/ In November 2020, I was interviewed by @KGWNews in Portland. Snippets of what I said were used on the show - "We blew it as a nation" and "It's all about lowering (inhalation) dose". kgw.com/article/news/h…
3/ And now we have this, a delta variant far more transmissible, w/ greater impact on children than original virus, & breakthrough infections of those vaccinated that (while 100 to 200 x safer in terms of serious outcomes) can infect others.

cnn.com/2021/07/29/pol…
Read 10 tweets

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