UmbralRaptor 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
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<whitequark>
i have already immolated another wasp (or could be the same)
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<raptop>
...if there were a p-zombie apocalypse, would anyone know?
<egg|anbo|egg_>
whitequark: glad to hear the cat is OK
<egg|anbo|egg_>
please pet
<egg|anbo|egg_>
(the cat, not the wasp)
<egg|anbo|egg_>
(do not pet the wasp)
<raptop>
pet the wasp with a fire elemental
<egg|anbo|egg_>
raptop: hm, Stellarium does’t have NEOWISE
<egg|anbo|egg_>
FAST ?
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<egg|anbo|egg__>
FAST?
<galois>
FAST: Five-hundred-meter Aperture Spherical radio Telescope
<egg|anbo|egg__>
LAMOST?
<egg|anbo|egg__>
!acr -add:LAMOST Large sky Area Multi-Object fibre Spectroscopic Telescope
<galois>
Definition added!
<egg|anbo|egg__>
DORIS?
<galois>
DORIS: Détermination d’Orbite et Radiopositionnement Intégré par Satellite / Doppler Orbitography and Radiopositioning Integrated by Satellite
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<egg|anbo|egg__>
the coloured curves are the trajectories of the angular velocity vector in a body-fixed frame
<whitequark>
this is way over my head
<egg|anbo|egg__>
if the angular velocity is close to the m3 or m1 axis, it will follow a smol circle about that axis (like the blue or red curve, but more smol)
<egg|anbo|egg__>
if it is near m2, it will follow a wide taco-edge-shaped curve like that
<egg|anbo|egg__>
which means it will go near m2, and then near -m2
<egg|anbo|egg__>
in other words, it will flip
<whitequark>
ohh
<whitequark>
i see
<egg|anbo|egg__>
(and in the limiting case when it is on the planes it will take an infinite time to go to either m2 or -m2
<egg|anbo|egg__>
)
<egg|anbo|egg__>
(this never happens but it tells you that the closer you are to m2 or -m2, the longer the time between flips is
<egg|anbo|egg__>
so you get this "long stable-looking spinning, flip, long stable-looking spinning, flip" behaviour
<egg|anbo|egg__>
whereas if you are halfway between m2 and m3 you get a mess
<egg|anbo|egg__>
I can probably show that more concretely with Principia now that it actually implements that corrcetly
<egg|anbo|egg__>
(note: PhysX gets this wrong)
<egg|anbo|egg__>
(this has wasted a lot of our time)
<raptop>
"(The interested reader can look at the definition of the polhode and the herpolhode in Wikipedia in French, German or Spanish; the English article is lame.)"
<raptop>
okay
<egg|anbo|egg__>
and then we point to a russian video
<raptop>
Well, yes
<egg|anbo|egg__>
whitequark: note how the random cubical box and the cosmonaut food tin cannot exhibit the flipping behaviour
<egg|anbo|egg__>
Earth is a cosmonaut food tin
<whitequark>
nice
<egg|anbo|egg__>
but as soon as you have a thing that doesn’t have symmetries, Джанибеков can strike
<egg|anbo|egg__>
plenty of people encounter that now that Principia has correctly implemented rotation, they try to spin-stabilize and the axis they want to stabilize on is unstable
<egg|anbo|egg__>
I should make food, I’ll see if I can make some interesting Principia eggsamples later
<raptop>
presumably a hard boiled egg is sufficiently rigid and triaxial?
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<egg|cell|egg>
Not sure about the rigidity but it's not very triaxial
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<egg|anbo|egg__>
!choose digest|eggsplain the Джанибеков effect
<galois>
egg|anbo|egg__: Your options: digest, eggsplain the Джанибеков effect. My choice: eggsplain the Джанибеков effect
<egg|anbo|egg__>
;choose digest|eggsplain the Джанибеков effect
<egg|anbo|egg__>
galois: did you eat kmath
<raptop>
!seen kmath
<galois>
raptop: I last saw kmath in here 7 days, 14 hours ago, saying: YouTube - The Distinctive Calls of Owls: A Sampler
<SnoopJeDi>
haha
<SnoopJeDi>
!8 did you eat kmath
<galois>
SnoopJeDi: yes
<SnoopJeDi>
!why
<galois>
SnoopJeDi: because reasons
<SnoopJeDi>
bad bot
<galois>
=[
* egg|anbo|egg__
pets a cat
<raptop>
!how delicious was kmath
<galois>
raptop: 962 delicious
<SnoopJeDi>
wow
* egg|anbo|egg__
pets the cat’s claws
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<raptop>
!wpn WeylandsWings
* galois
gives WeylandsWings a cnoon
<WeylandsWings>
no idea what that is
<raptop>
a what
<WeylandsWings>
!wpn raptop
* galois
gives raptop a GNOME magnetoresistance
<WeylandsWings>
GNOME?
<WeylandsWings>
!expand GNOME
<raptop>
!acr -add:GNOME GNU Network Object Model / Global Network of Optical Magnetometers to search for Exotic physics
<UmbralRaptop>
"Highly qualified final year undergraduate students or those who have received an undergraduate degree of all disciplines may apply for the DAAD Study Scholarship for a full Master's degree program at a German university or for study at a German university as part of a postgraduate or Master's degree program completed in the home country."
<UmbralRaptop>
In case e_14159_ needs a research assistant
<UmbralRaptop>
!8 Would a large plush adequately mitigate feelings of touch starvation?
<galois>
UmbralRaptop: yes
<_whitenotifier-d13c>
[Principia] eggrobin pushed 3 commits to master [+0/-0/±8] https://git.io/JJqHf
<_whitenotifier-d13c>
[Principia] eggrobin 98ae23b - NO leap second will be introduced at the end of December 2020.