egg|nomz|egg 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.
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<SnoopJeDi>
LOL I didn't realize that scrapy's API is partially built around subclassing Spiders, but I love the idea of a machine-spider army it conjures up
<egg>
!u にゃー
<Qboid>
U+306B HIRAGANA LETTER NI (に)
<Qboid>
U+3083 HIRAGANA LETTER SMALL YA (ゃ)
<Qboid>
U+30FC KATAKANA-HIRAGANA PROLONGED SOUND MARK (ー)
<egg>
;8ball was bofh^28 eaten by a moth-bat hybrid
<kmath>
egg: Yeah
<egg>
ah
<SnoopJeDi>
I don't think I've ever seen that reply
<SnoopJeDi>
it's gold
<SnoopJeDi>
(en)
<UmbralRaptop>
Are mothbats more like yttibats or adiabats?
<egg>
UmbralRaptop: what about bofhmoths
<UmbralRaptop>
egg: set up a lamp, and see if you get a bofh^28?
<egg>
hmmm
<egg>
good point
<UmbralRaptop>
Well, I guess a LAMMPS.
<bofh^28>
egg: I guess adiabats,
<egg|cell|egg>
Bofh!
* egg|cell|egg
pokes bofh with chat and cats
* UmbralRaptop
meows at the cats.
<rqou>
egg: btw i just asked my dad and he doesn't know how to use that stroke count IME either :P
<egg|cell|egg>
Huh
<rqou>
we're all lame
<egg|cell|egg>
Whereas I know how to use it but I don't speak any language written with it
<egg|cell|egg>
貓喵
<egg|cell|egg>
There's also a screen writing mode which works pretty well with a stylus
<egg|cell|egg>
Works with HK grass radical stroke order too
<SnoopJeDi>
whoa, 貓喵 is a gorgeous construction
<UmbralRaptop>
Apparently meowing cats are mongeese?
<egg|cell|egg>
Actually the handwriting thing seems weirdly erratic
<SnoopJeDi>
UmbralRaptop, as a kanji in Japanese it can mean "carefree" if Google Translate is to be trusted (which is always suspect)
<UmbralRaptop>
¯\_(ツ)_/¯
<SnoopJeDi>
although it's nice that machine translation is still enjoying great improvements
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* bofh^28
meows at egg|cell|egg
<egg|cell|egg>
zzZmeowzzz
* UmbralRaptop
sets a blanket on egg|cell|egg
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<Qboid>
5d 0h 0m 0s left to event #30: [at 2018-10-19 01:45:00]. Say '!kountdown 30' for details
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* icefire
squints
<icefire>
that looks like 猫 but I don't know what the second kanji is?
<kmath>
YouTube - Le pendule de Foucault de nouveau suspendu au Panthéon
<egg>
(the original being at the arts & métiers)
<bofh^28>
Oh nice.
<bofh^28>
Also I completely forgot there's an observatory at the Sorbonne that's not the Observatoire.
<egg>
lɒl
<egg>
!wpn bofh^28
* Qboid
gives bofh^28 a galactic demi-cannon which vaguely resembles a weapon
<egg>
me stares at Qboid
<bofh^28>
rofl
<bofh^28>
I guess a demi-cannon would resemble a wepon, hopefully it'd do more than just resemble one...
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<egg>
bofh^28: so on second thought my idea of patching the force and integrating back doesn't work, because the force also depends on the angles
<egg>
bofh^28: and thus if you just make the radial component fall to a constant you just get a corrugated potential eggstending to infinity
<egg>
bofh^28: so instead you want to make the potential fall to 0, but still prevent the force from increasing (it's ok if it doesn't decrease as fast as it should over the falloff segment, but if it goes up something is wrong)
<egg>
bofh^28: if the sigmoid applied to the potential is a degree 3 polynomial, that means that the sigmoid must apply for twice the length on which the unscreened force applies
<egg>
bofh^28: if it's degree 7, seventy thirteenths (5.4ish) of the unscreened stretch
<egg>
bofh^28: if it's erf-based, the criterion is never satisfied :-p
<kmath>
<Astro_Wright> On that note, what are some of the oldest, most out-of-field, or otherwise favorite citations you have used in a refereed paper?
<bofh^28>
every single goddamn time: "I know, I'll take the 4" *10 seconds later as everyone is trying to sardine themselves into the cars* "You know, I should've just walked..."
<bofh^28>
relatedly, there's an unusually large preponderance of Columbidae over at Saint-Sulpice cathedral.
<bofh^28>
(okay it's actually not that bad, it being Sunday afternoon & catching it from Châtelet where the train does half-empty mercifully both helped a lot. but holy fuck the 4 is basically permanently over capacity).
<bofh^28>
clearly the knockoff is doing something silly like unpivoted Gaussian Elimination to construct said cookies,
<egg>
bofh^28: yes, PiM's, why are they numerically stable
* egg
pokes bofh^28
<egg>
!wpn
* Qboid
gives egg a Lippmann theorem-like page table
<egg>
!wpn bofh^28 latency
* Qboid
gives bofh^28 latency a raw cone
<bofh^28>
egg: b/c I was doing numerical linalg the same day as I first saw them and the company name was, erm, familiar :p
<egg>
bofh^28: ah
<bofh^28>
(I think we were in like Gare de l'Est or somesuch?)
<egg>
bofh^28: probably in ANBO
<egg>
I think we ate a packet of those
<egg>
bofh^28: but they make lots biscuits other than PiM's, so I was looking for numerical methods called "PiM's" and getting confused :-p
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<egg>
bofh^28: so with polynomial sigmoids on the potential, if the constraint is that the force under the effect of the sigmoid is no greater than the true force, you can get a C0 force with л := sigmoid stretch / unscreened stretch = 6, a C1 force with л = 30, and the train stops here
<egg>
smoother forces don't satisfy that constraint :-p
* egg
double bofh^28
<egg>
bofh^28: wait, actually I'm not sure that's even correct
<egg>
yeah it's bullshit, I should look at the geometric mean of the sigmoid interval and not the arithmetic mean
<egg>
yeah, the force under the sigmoid is always bigger than the unscreened one somewhere
<egg>
!u U+200c
<Qboid>
U+200C ZERO WIDTH NON-JOINER ()
<egg>
whitequark: hmm
<bofh^28>
yes that won't work at all, gah. this situation is not at all nice sadly.
<egg>
bofh^28: so I guess the best I can look for is that the first k derivatives of the force have constant sign
<egg>
(won't work with erf afaict, but fuck C∞
<bofh^28>
like, if we work with erfc, erfc is *basically* zero for |x|>6 anyway, and erf is just 2-erfc iirc
<egg>
bofh^28: yeah but it makes the force nasty
<egg>
polynomials are good
<egg>
bofh^28: also double
<egg>
!wpn whitequark and котеньке
* Qboid
gives whitequark and котеньке a copy-on-write semigroup
<egg>
bofh^28: so I'll be going to ANBO on the 20th
<egg>
bofh^28: okay, so I conjecture that all derivatives of the force have the right sign with the 3rd degree sigmoid if the sigmoid extends for twice as long as the unmodified force does
<egg>
at least if the force is of degree 2
<egg>
not sure what happens for higher-degree forces....
<egg>
should be fine too
<egg>
(actually proving that conjecture seems annoying)
<bofh^28>
18:36:18 <@egg> (actually proving that conjecture seems annoying)
<bofh^28>
it just seems tedious tbh :p
<egg>
bofh^28: afaict higher degree sigmoids (with more continuous derivatives of the force) have to be longer in order for all derivatives to have constant sign
* egg
pokes bofh^28 with a !wpn
<egg>
!wpn
* Qboid
gives egg a revolving ticket
<egg>
that works
<bofh^28>
!wpn egg
* Qboid
gives egg a Zener lobster
* egg
eats the lobster
<bofh^28>
wait, constant *sign*?
<egg>
yes
<egg>
so that the force under the sigmoid isn't bumpy or otherwise kinky
<kmath>
<QuietPineTrees> There are 21 million cubic feet of molten rock and metal directly below every square foot of Earth. ⏎ There is litera… https://t.co/p1EKLOYIUa
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<egg>
!wpn bofh^28
* Qboid
gives bofh^28 an unionized cthonic rake
<Majiir>
!wpn egg
* Qboid
gives egg a revolving UmbralRaptor
<Majiir>
:OOOOO
<icefire>
!wpn
* Qboid
gives icefire a Ляпунов dip pen
<egg>
!wpn Majiir
* Qboid
gives Majiir a helium heisenbug which strongly resembles a Snark
<Majiir>
egg, have you played with Rust at all?
<egg>
not much
<egg>
got involved in standardization though, on the infamous non-ASCII identifiers RFC
<kmath>
<eggleroy> Gérard Petit and Brian Luzum, eds. (2010), “Transformation between the International Terrestrial Reference System a… https://t.co/fRxg9ZBy7E