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January 15, 2021 Archives
Friday, January 15, 2021
CONTEXT: Humidifiers: Simpler Is Better?
Not mentioned: if you have a lot of lime scale (calcaire) in your water, the the wick of an evaporative humidifier will become less and less effective as its pores are clogged with scale deposits. So, even if you don't have a problem with smelly gunk growing in the humidifier, it's best to replace the wick(s) at least once per season or when you notice the relative humidity falling below where it's normally maintained.
Posted at
20:40
THE HAPPENING WORLD: Facial Recognition Predicts People's Politics with 72% Accuracy
Facial recognition technology can correctly predict a person's political orientation 72% of the time, better than chance (50%), human judgment (55%), or a personality questionnaire (66%). https://t.co/IUEtEYsx4A pic.twitter.com/NAuC9ZBJDY
— Rob Henderson (@robkhenderson) January 15, 2021
Posted at
12:51
TRACKING WITH CLOSEUPS: Mathematicians Resurrect Hilbert’s 13th Problem
"Long considered solved, David Hilbert’s question about seventh-degree polynomials is leading researchers to a new web of mathematical connections." via @QuantaMagazine https://t.co/ZK6BAxhz12
— Quantum Gravity Res. (@emergencetheory) January 14, 2021
Did you know that every smooth cubic surface contains exactly 27 straight lines?
Posted at
12:24