raptop changed the topic of #kspacademia to: https://gist.github.com/pdn4kd/164b9b85435d87afbec0c3a7e69d3e6d | Dogs are cats. Spiders are cat interferometers. | Космизм сегодня! | Document well, for tomorrow you may get mauled by a ネコバス. | <UmbralRaptor> egg|nomz|egg: generally if your eyes are dewing over, that's not the weather. | <ferram4> I shall beat my problems to death with an engineer. | We can haz pdf
<oeuf> UmbralRaptop: well there's Mars
<UmbralRaptop> Point
<UmbralRaptop> I'd also suggest Sol, but lolsolarninimum
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<oeuf> meow
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<_whitenotifier-cd19> [Principia] kc9jud commented on issue #2297: Strange missing redistributable VC++ runtime error - https://git.io/fjAnb
<UmbralRaptop> caw
<mlbaker> !wpn
* galois gives mlbaker a manganese homologous kitten with a trapezoid attachment
* UmbralRaptop wonders what sort of mathematical object a kitten would be. Presumably like a ket but smoler?
<mlbaker> a cat is a collection of objects, a collection of morphisms, and a monoidal composition law
<kmath> <mmalex> the old lfo trick to get stable sin & cos waves still amazes me, especially as it looks like a complex multiplicati… https://t.co/9KdnBElkVy
<egg|cell|egg> Mofh: you can post the cats
<kmath> https://twitter.com/eggleroy/status/1110907856960847872 <eggleroy> @stephentyrone @demize95 @bofh453 Compare with the same cats subjected to nonsymplectic integration (shown here in… https://t.co/MwSvGykFAH
<kmath> https://twitter.com/eggleroy/status/1165880201999540224 <eggleroy> @rygorous @whitequark @tom_forsyth @andrewwillmott @mmalex See also the Hairer phase space cats: https://t.co/ejc47RJcFr
<mofh> !u 𡚴
<galois> 𡚴: U+216b4 CJK UNIFIED IDEOGRAPH-216B4
<whitequark> hm
<whitequark> can someone teach me the uh
<whitequark> there's probably some diffequation that describes airflow. i want to understand that
<whitequark> i failed diffequations 8 times.
<UmbralRaptop> eek
<kmath> <whitequark> small data ⏎ i'm not actually sure what to do next https://t.co/hxeDotYitK
<UmbralRaptop> Non-helpful answer: Navier-Stokes, which is infamously annoying and doesn't have much in the way of analytical solutions.
<whitequark> lol no
<whitequark> i'm an engineer not a scientist
<UmbralRaptop>
<UmbralRaptop> er, hah
<UmbralRaptop> Oh, right. Newton's law of cooling. (I think)
<UmbralRaptop> x(t) = x_env + (x(0) - x_env) * e^(-rt)
<UmbralRaptop> You'll need to find r from the data, or do some estimating based on room size, airflow, etc
<whitequark> hmm
<kmath> <DietrichEpp> @whitequark Unfortunately it's nonlinear so least-squares is annoying. If you can calculate how long it takes the s… https://t.co/NYBY103nHW
<whitequark> wait, -rt?
<whitequark> oh
<whitequark> oh yeah
<UmbralRaptop> yeah, write just named things differently
<UmbralRaptop> *we
* UmbralRaptop 🔪 📱
<whitequark> i wonder if it's more like this though? https://en.wikipedia.org/wiki/Convection%E2%80%93diffusion_equation
<galois> [WIKIPEDIA] Convection–diffusion equation | "The convection–diffusion equation is a combination of the diffusion and convection (advection) equations, and describes physical phenomena where particles, energy, or other physical quantities are transferred inside a physical system due to two processes: diffusion and convection. Depending on context..."
<whitequark> i guess it's just convection
<whitequark> not diffusion
<whitequark> hrm
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<SnoopJeDi> I believe NASA has a manual somewhere for fluid dynamics. I vaguely remember reading some of it when I was doing fluid heat transfer stuff in COMSOL. Fluids are obnoxious.
<SnoopJeDi> and naturally, Richard Fitzpatrick has a book on it, too https://farside.ph.utexas.edu/teaching/336L/Fluidhtml/Fluidhtml.html
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<_whitenotifier-cd19> [Principia] pleroy commented on issue #2297: Strange missing redistributable VC++ runtime error - https://git.io/fjAVZ
<kmath> <moffmachi> sunset cruising https://t.co/4SSIQxGdy9
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<_whitenotifier-cd19> [Principia] eggrobin opened pull request #2310: Diurnal testing - https://git.io/fjAon
<_whitenotifier-cd19> [Principia] Pending. Build queued… - 
<_whitenotifier-cd19> [Principia] Pending. Building… - http://casanova.westeurope.cloudapp.azure.com:8080/job/Principia/3846/
<_whitenotifier-cd19> [Principia] eggrobin synchronize pull request #2310: Diurnal testing - https://git.io/fjAon
<_whitenotifier-cd19> [Principia] pleroy labeled pull request #2310: Diurnal testing - https://git.io/fjAon
<_whitenotifier-cd19> [Principia] Pending. Build queued… - 
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<oeuf> I'm making some Principia tests run every 24 h at master instead of on pull requests before merging, because some tests are big; so, following astronomical terminology, that's a diurnal build, and the tests that don't get run periodically at all are secular tests,
<_whitenotifier-cd19> [Principia] Success. Build finished. - http://casanova.westeurope.cloudapp.azure.com:8080/job/Principia/3846/
<_whitenotifier-cd19> [Principia] Pending. Building… - http://casanova.westeurope.cloudapp.azure.com:8080/job/Principia/3847/
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<UmbralRaptop> (Insert "In birds!" comment here)
<SnoopJeDi> !wpn -add:adj diurnal
<galois> Added adj 'diurnal'
<oeuf> !acr -add:adj secular
<galois> Definition added!
<SnoopJeDi> !wpn -add:adj sidereal
<galois> Added adj 'sidereal'
<SnoopJeDi> !wpn -add:wpn quadrupole
<galois> Added wpn 'quadrupole'
* SnoopJeDi stabs coordinate systems
<UmbralRaptop> !wpn -add:adj nocturnal
<galois> Added adj 'nocturnal'
<UmbralRaptop> !wpn -add:adj crepuscular
<galois> Added adj 'crepuscular'
<UmbralRaptop> !wpn -add:wpn monopole
<galois> Added wpn 'monopole'
<UmbralRaptop> !wpn -add:wpn dipole
<galois> Added wpn 'dipole'
<UmbralRaptop> !wpn -add:wpn octopole
<galois> Added wpn 'octopole'
<UmbralRaptop> !wpn SnoopJeDi
* galois gives SnoopJeDi a adobe hammer with a eoraptor attachment
<UmbralRaptop> !wpn -add:adj blessed
<galois> Entry already exists!
<UmbralRaptop> !wpn -add:adj cursed
<galois> Entry already exists!
<UmbralRaptop> hrm
<SnoopJeDi> !wpn UmbralRaptop
* galois gives UmbralRaptop a analytic sword
* UmbralRaptop uses the sword to stab a techbro in the ML for simple problems
<_whitenotifier-cd19> [Principia] Success. Build finished. - http://casanova.westeurope.cloudapp.azure.com:8080/job/Principia/3847/
<SnoopJeDi> okay I put a very lousy 'an' check into !wpn, hopefully the bot is moderately less stupid about that
<SnoopJeDi> `article='an' if wpn[0].lower() in 'aeiou' else 'a'` and a similar check in the attachment routine (there should probably be a make_article() but eh)
<UmbralRaptop> yay
<_whitenotifier-cd19> [Principia] eggrobin closed pull request #2310: Diurnal testing - https://git.io/fjAon
<_whitenotifier-cd19> [Principia] eggrobin pushed 4 commits to master [+2/-2/±5] https://git.io/fjAKK
<_whitenotifier-cd19> [Principia] eggrobin 8e2d151 - filtering
<_whitenotifier-cd19> [Principia] eggrobin 05ff2f8 - mark TRAPPIST-1 optimization secular
<_whitenotifier-cd19> [Principia] eggrobin 558e1ba - rebuild_release
<_whitenotifier-cd19> [Principia] eggrobin bfac4a6 - Merge pull request #2310 from eggrobin/diurnal-testing Diurnal testing