{"items": [{"author": "jimv", "source_link": "https://www.lesswrong.com/posts/CaoacS9mBEizFZkXZ#T5eRtL68RS8rhgTBd", "anchor": "lw-T5eRtL68RS8rhgTBd", "service": "lw", "text": "You mention near the start of the piece:\n\n
A gentle 1mph breeze clears an 90-ft diameter circle in a minute.\n\n
Do you have a source / calculation for that? (Not doubting it at all - I am interested in digging into how those values vary for other wind strengths etc., and the search results I'm getting are dominated by calculations on internal air changes.)\n", "timestamp": 1594461106}, {"author": "simon", "source_link": "https://www.lesswrong.com/posts/CaoacS9mBEizFZkXZ#dWic2DGsT66WT9PRo", "anchor": "lw-dWic2DGsT66WT9PRo", "service": "lw", "text": "→ I think it's just that 1 mile per hour = 88 feet per minute which is close to 90.\n", "timestamp": 1594482508}, {"author": "jefftk", "source_link": "https://www.lesswrong.com/posts/CaoacS9mBEizFZkXZ#qmwkqhC5Y5S3FPbDt", "anchor": "lw-qmwkqhC5Y5S3FPbDt", "service": "lw", "text": "→ → Yup!\n", "timestamp": 1594490388}, {"author": "Vladimir_Nesov", "source_link": "https://www.lesswrong.com/posts/CaoacS9mBEizFZkXZ#a2cp2LzLmYcSGdPfp", "anchor": "lw-a2cp2LzLmYcSGdPfp", "service": "lw", "text": "→ \n
Not doubting it at all\n\n
I don't think doubting should be either socially frowned-upon or uncalled-for where one doesn't see an argument that makes a claim evident.\n", "timestamp": 1594502371}, {"author": "Pattern", "source_link": "https://www.lesswrong.com/posts/CaoacS9mBEizFZkXZ#qRq6WNF54aJejfLWq", "anchor": "lw-qRq6WNF54aJejfLWq", "service": "lw", "text": "Prompted by tuberculosis risk, 100 years ago, occasionally students would have school outdoors, even in the winter:
So that's what a forest school is. (The link is really worth reading, and it's got a lot more pictures with great ideas.)", "timestamp": 1594501196}, {"author": "rhollerith_dot_com", "source_link": "https://www.lesswrong.com/posts/CaoacS9mBEizFZkXZ#ebLm4M9QSaFdxWtDR", "anchor": "lw-ebLm4M9QSaFdxWtDR", "service": "lw", "text": "Certainly a breeze is better than no breeze, but, "a gentle 1mph breeze clears an 90-ft diameter circle in a minute," is probably not be even approximately true if the breeze is turbulent, which most breezes are.
Anyone reading this has probably experienced a non-turbulent (i.e., "laminar") breeze. One sign that a breeze is laminar is that the breeze makes you cold a lot faster than you would guess based on (your subjective impression of) the speed of the breeze. A breeze at dusk or at night is more likely to be laminar than a breeze when the sun is strong. A breeze on a beach is more likely to be laminar than a breeze inland.
Some enterprises intentionally create laminar breezes indoors: semiconductor fabs, surgical operating rooms, mushroom growers. The method universally used (squirrel-cage fans and HEPA filters) might also reliably filter coronavirus from the laminar breeze.
Here is a home-made laminar flow "wall" to be used to prepare mushrooms for growing: https://www.youtube.com/watch?v=RmnpdHM5Loc", "timestamp": 1594508617}]}