Edderic Ugaddan @eddericu
Senior Data Scientist, Interested in Causal & Bayesian Inference, Education, and Indoor Air Quality. Breathesafe, LLC github.com/edderic Waltham, MA Joined March 2014-
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So my @Uber dropped me off at the opposite side of town, at the wrong address, and I’ve contacted customer service and I’m not getting a refund. I’m mad as hell. Yall have pissed off the wrong one.
Several parents were applauding the announcement. I was the party pooper who kindly dropped a comment in the chat that turning the HVAC off is a violation of CalOSHA code 5142. 🦗 Schools - please stop trying to save money at the expense of staff and student health. #CleantheAir
CAW has its first sign up from a U.K. school 🎉 ✅Using CO2 monitors ✅Using air filters ✅Signed up to @SAMHEProject ✅Aware of natural ventilation CO2 targets. If your school is using any of the above sign up for the app using the registration form: cleanairwhere.com/submit-a-locat…
The DIY ERV (energy recovery ventilator) efforts by @open_erv and @alexkessler0 are an important complement to DIY CR Boxes because unlike purifiers, ERVs can ventilate (reduce CO2) air-tight homes without losing much heat and reduce viral aerosol lifetimes.
The DIY ERV (energy recovery ventilator) efforts by @open_erv and @alexkessler0 are an important complement to DIY CR Boxes because unlike purifiers, ERVs can ventilate (reduce CO2) air-tight homes without losing much heat and reduce viral aerosol lifetimes.
This is exactly what militarisation of the US police looks like- two officers brutalising a peacefully protesting faculty member- pushing her violently to the ground for absolutely no reason except that they can. Shame on @EmoryUniversity for putting staff & students at risk
This is exactly what militarisation of the US police looks like- two officers brutalising a peacefully protesting faculty member- pushing her violently to the ground for absolutely no reason except that they can. Shame on @EmoryUniversity for putting staff & students at risk
Texas cops aren’t just arresting journalists, they’re viciously assaulting them.
Let's find a way to support everyone who is dealing with a wide range of challenges. I wear a mask indoors 90% of the time and only remove it when I assess risk via CO2 and proximity to open doors/windows. I continue to fight for clean indoor air for all (the ultimate solution).
And this is why you always open the front and second back windows! CO₂ readings from the bus
And this is why you always open the front and second back windows! CO₂ readings from the bus https://t.co/gxntx2dz2q
It is settled.. I am voting for Target.
THIS. I welcome a conversation with the new @WHO chief scientist @JeremyFarrar about his recent statements that @WHO had no idea about the FACT #COVIDIsAirborne until now. Please DM or email me @JeremyFarrar.
THIS. I welcome a conversation with the new @WHO chief scientist @JeremyFarrar about his recent statements that @WHO had no idea about the FACT #COVIDIsAirborne until now. Please DM or email me @JeremyFarrar.
Getting rid of this person who has a long track record of denying airborne and promoting handwashing is a key step in ending this pandemic and avoiding future ones. Dr. John Conly has to be removed from power along with his cronies who have pushed for droplet dogma for too long.
Getting rid of this person who has a long track record of denying airborne and promoting handwashing is a key step in ending this pandemic and avoiding future ones. Dr. John Conly has to be removed from power along with his cronies who have pushed for droplet dogma for too long.
Could it be any more obvious that the USDA is totally captured by industry?
Could it be any more obvious that the USDA is totally captured by industry?
Reboosting this for anyone who needs a reminder of how to increase ventilation on a school bus… like me, who inexplicably signed up to be a field trip chaperone tomorrow 🙃: Open both windows in the front row and second/third row from the back
Reboosting this for anyone who needs a reminder of how to increase ventilation on a school bus… like me, who inexplicably signed up to be a field trip chaperone tomorrow 🙃: Open both windows in the front row and second/third row from the back
I recall reading this at the time as a trainee. I do not get how anyone can claim we knew so little in Jan 2020 Just because some people either didn’t read or refused to believe in airborne - the rest of us suffered the error of the refusal to mitigate airborne
I recall reading this at the time as a trainee. I do not get how anyone can claim we knew so little in Jan 2020 Just because some people either didn’t read or refused to believe in airborne - the rest of us suffered the error of the refusal to mitigate airborne
.@mehdirhasan was covering the genocide in Gaza like a true journalist and then got fired from MSNBC. He then went on to start his own media company making the genocide the lead story at @zeteo_news. Be like Mehdi, keep going and keep fighting for Palestinian liberation.
Aranet sale $143 #CovidCoupon CO2 monitor #ventilation There’s a 10% off promo code off $159 amzn.to/3W7u7sU
Many experiments on Twitter/X and in science journals highlight that clear air delivery rate matters more than filtration. I did a simulation to explain. So, how does a restrictive HEPA (99.9%) filter compare to a MERV13 (70%) furnace filter? Spoiler: HEPA loses
31/ Totally agree w/ this: @WHO, @CDCgov, and almost all health ministries need to APOLOGIZE for their HUGE BLUNDER of denying #COVIDisAirborne They have lost the trust of many of us. Accepting their errors and apologizing would be 1st step to regain it x.com/microlabdoc/st…
31/ Totally agree w/ this: @WHO, @CDCgov, and almost all health ministries need to APOLOGIZE for their HUGE BLUNDER of denying #COVIDisAirborne They have lost the trust of many of us. Accepting their errors and apologizing would be 1st step to regain it x.com/microlabdoc/st…
Additional partners for #Cohort4 include @Represent_Ed & @elders_network. @umojahealth #SummerInterns & #YouthMobilizers are part of the legacy of #BabaArnoldPerkins (Co-founder, @elders_network & Founding member & Chair @UCSFCancer #CommunityAdvisoryBoard, 2013-2023) #FUBU
Additional partners for #Cohort4 include @Represent_Ed & @elders_network. @umojahealth #SummerInterns & #YouthMobilizers are part of the legacy of #BabaArnoldPerkins (Co-founder, @elders_network & Founding member & Chair @UCSFCancer #CommunityAdvisoryBoard, 2013-2023) #FUBU
@carlzimmer @nytimes @WHO 17/ But as we have been seeing with the @CDCgov and its #HICPAC committee in the US, which is precisely trying to decide that question... ... this is NOT all about poor countries x.com/jljcolorado/st…
@carlzimmer @nytimes @WHO 17/ But as we have been seeing with the @CDCgov and its #HICPAC committee in the US, which is precisely trying to decide that question... ... this is NOT all about poor countries x.com/jljcolorado/st…
Dr Ellie Murray, ScD @EpiEllie
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2K Followers 1K Following Personal ads for covid safe friends and dating ❤️ follow to view/share. 18+PrusaSlicer @PrusaSlicer
6K Followers 19 Following Best way to slice and dice your 3D models for 3D printing with any FFF printer 🔪 Developed by an amazing team at @Prusa3D 🫶 Now official account 🥳Antiviral Marketing @antiviral_mktng
4K Followers 931 Following Anti-COVID. Fit-test your respirator! PortaCount enthusiast. Reinfection control group. LC. 🌱Ⓐ🇵🇸. DMs are cool, say hi! @antiviral.bsky.socialM Pang @mpangch
135 Followers 47 Following Immigrant, Engineer, and Founder (they/them) https://t.co/3HibY6HXCL | https://t.co/ewH4TZjiwy | https://t.co/rg6lUMaTts @ https://t.co/pEziUe21iE on https://t.co/hnMjhpnEGACarolyn Marshall @_carolynm_
1K Followers 872 Following Software developer, mother, perpetual student. Tweets are my own. she/her. @[email protected] @carolynm.bsky.socialOcean𓅃Ridge @RidgeOcean
971 Followers 2K Following | Network Engineer | Clean Air Enjoyer | a queer sea creature trying to understand technology. @RidgeOcean-@🌥💙/@hachyderm.ioZack Deis @Vailima1
310 Followers 523 FollowingWalked into the pizza shop to pick up my order, guy exiting had the audacity to say, "I bet that's a pretty smile under there, let's see it." "Um no, covid already tried to kill me twice, I am protecting myself and I'm protecting you too, so you're welcome." His jaw dropped.
So my @Uber dropped me off at the opposite side of town, at the wrong address, and I’ve contacted customer service and I’m not getting a refund. I’m mad as hell. Yall have pissed off the wrong one.
Color of the green honestly turned out better than I thought it would given the base I started with was radioactive waste green. Wife has dubbed it "Baja Blast green" 😂
This is super interesting and useful inquiry! Not only does CO2 provide a measure of rebreathed fraction & a proxy for fresh air intake, it’s also a measure of air pH which directly impacts viral decay.
I’m excited to discuss our latest research on how ambient CO2 affects how long #SARSCoV2 remains infectious in air. We report that even subtle increases in CO2 affects both how long #COVIDisAirborne and transmission risk. Here’s a🧵going over the findings nature.com/articles/s4146…
#NewProfilePic by @SurvivingCFS Kendra is such a talented artist, I love her work!!
@AbundantLandUse All good. So, it's kind of both. Indoor CO2 is related to outdoor CO2, as the outdoor CO2 sets the minimum value that the indoor CO2 can reach. And, indoor CO2 conc will tend to be a certain concentration above outdoor levels. So as the outdoor CO2 goes up, indoor will follow.
I don't even remember what for, but I'm in the NPM CLI authors file 🤣 Probably some windows issue, I bet.
Now another reason to keep an eye on CO2 levels! Both as a proxy for how much "exhale" is building up in a space, and bc higher CO2 enables covid to remain infectious for longer
It has become popular to use CO2 monitors to estimate risk. This is based upon the idea that the CO2 informs about how well a space is ventilated. From our study, the results show that the levels of the CO2 will also inform about how long the virus remains infectious in the air.
Several parents were applauding the announcement. I was the party pooper who kindly dropped a comment in the chat that turning the HVAC off is a violation of CalOSHA code 5142. 🦗 Schools - please stop trying to save money at the expense of staff and student health. #CleantheAir
CAW has its first sign up from a U.K. school 🎉 ✅Using CO2 monitors ✅Using air filters ✅Signed up to @SAMHEProject ✅Aware of natural ventilation CO2 targets. If your school is using any of the above sign up for the app using the registration form: cleanairwhere.com/submit-a-locat…
It's probably a good thing that I didn't design the @NukitToBeSure tempest - I'm the kind of crazy who would package it with torx screws instead of Philips 😂😂
Some seem to be missing the point about why the high proportion of viral particles in milk is concerning. It is because it signals the widespread infection of dairy cows. Much more than anyone had imagined even 10 days ago. The more infections, the more opportunities to mutate.
The DIY ERV (energy recovery ventilator) efforts by @open_erv and @alexkessler0 are an important complement to DIY CR Boxes because unlike purifiers, ERVs can ventilate (reduce CO2) air-tight homes without losing much heat and reduce viral aerosol lifetimes.
1/ A very important finding from the Bristol group: higher CO2 indoors makes the SARS-CoV-2 virus survive much longer in air Makes ventilation more important, transmission goes approx. with its square, not just linearly
Just to be clear, what this is saying is that, as we continue to increase the baseline amount of carbon dioxide in the air, it makes viruses that float in the air last longer, meaning they can infect more animals and humans before breaking down
@CathNoakes Yes please!!! I'm super curious to see how the Triphasic Decay Profile will affect estimates of short distance transmission in a CFD model! We've shared all the decay profie data (at Nature)....
@ukhadds Great to see this and very much adds to the need for managing ventilation and occupancy together. Would be interested to put this into a CFD model at some stage, as that could also model the effect of spatial change in CO2 concentration in the exhaled breath.
@AbundantLandUse It's more like a cylinder or column of fresh air that fades with distance.
@Engineer_Wong @XINN1X that would be great bc I need a laminar flow fan but can't afford it, so I've been looking into how to diy
@Engineer_Wong @XINN1X Is it possible to make those calculations without the equipment (or knowledge) to test properly? I've been working on a variation of @eddericu's Laminair to adjust for the dimensions of the parts, but the relationship between those parts is the hard part.