Director of the Nucleic Acid Observatory in Boston. Speaking for myself unless I say otherwise.
jefftk
Karma: 22,436
the two respirators I know of that do not were designed by amateurs during the COVID pandemic
I’m aware of at least the ElastoMaskPro, Flo Mask Pro, and Envo Pro N95. Are these what you’re talking about?
almost all industrial respirators have valves
Sure, but they’re also not designed for infection control. If you’re using them in a situation where you don’t need source control, then a valve is great. But ones designed for medical contexts generally don’t have valves.
maybe my concern about evaporation vs making droplets is irrelevant
I think that’s the case—if you look at more recent work they’ve used a wide range of ways of getting glycol into the air.
I wonder whether fog machines that are already installed in crowd-gathering venues could be used for infection control!
It’s more than that: fog machines used today (when used with glycols, which is the normal fog juice) are already performing infection control!
Are you planning any measurements of how far the TEG travels or how effectively the humidifier-generated droplets clean the air?
I’m not, though if anyone wanted to come test efficacy I’d be happy for them to measure the effect of us having it on sometimes and off other times.
it’s possible that you were wearing well-insulated shoes
I was barefoot, but I’m also not sure shoes would be that big a component since I was fully in the water?
you just didn’t notice the sensation because of adrenaline
I don’t remember feeling any shock, and I think I still would have noticed?
Calibrating an Ultrasonic Humidifier for Glycol Vapors
The NAO is Hiring for Partnerships, Response, Virology, and Wet Lab Management
Kids and Cleaning
Pasta Cooking Time
twice as fast as it actually goes
Music notation rhythms are relative, so I don’t think this has a real meaning?
It’s wrong in the sense that it’s violating convention for no good reason, and so is hard for people to read. My intended audience is folk musicians who are really used to tunes in 2⁄2 (and other conventions, like four measures per line), and I’d written in 2⁄4 by accident.
Your last two Musescore files are missing some separation between 1st and 2nd endings
Thanks! I’ve uploaded new versions of them that put the repeat sign between the endings, which is also logically where it belongs.
Writing Out My Tunes
BIDA Masking and Attendance
Trialing Far UVC and Glycol Vapors at BIDA
Reference Contra Dance Sound System 2025
Sturdier and Lighter Pedalboard
Pro AI Bots Scraping List Archives
Two Kinds of Do Overs
Very Light Hardshell Suitcases
Are child swim lessons common in America? Over here, free swim lessons are now provided for children, and mandatory swim lessons are provided as part of primary school.
It sounds like maybe you’re talking about somewhat older kids; is it common for kids in your country to have taken swim lessons by age four?
I would guess the claim afterwards that she couldn’t was rationalization, and that the real reason was she was stunned with surprise, just based on the sense that I can’t imagine the dress was really that restrictive
The dress was my speculation (and not that it was restrictive, but that it was buoyant under her legs). Her claim was that her legs wouldn’t go down, and while I haven’t tested this myself in water I think this is probably right: you need to bend your legs to get them under you, and she was keeping them straight due to inexperience with water.
Sorry for being slow (this came out in June) but this data is now linked from our website for the treatment plants that have given permission: https://dholab.github.io/public_viz/001-make-by-city-and-by-virus-dashboards/index.html