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> … one of the other grad students just compared me to nomal O_o | <ferram4> I shall beat my problems to death with an engineer.
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<bofh>
"The order gets its name from the Latin for "goat-milker", an old name based on an erroneous view of the European nightjar's feeding habits." #wikifinds
<UmbralRaptor>
o_O
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<Ellied>
Hello yes, I am ellie, my qualifications include burning myself with soldering irons and building electrically-convincing fake particle and photon detectors, please accept my application to your grad school
<bofh>
I'unno, those seem like pretty strong qualifications IMO
<Ellied>
I wonder how long it would take a group of beamline scientists to figure it out if I surreptitiously disconnected a signal cable from an APD and attached it to an avalanche transistor instead
<Ellied>
"I don't get it. It still stops when we lower the bias voltage, so it's not miswired, and if it were a bad detector, we'd just get nothing. Why won't it respond to light?!"
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<UmbralRaptor>
Eek
<bofh>
Ellied: OH GOD
<Ellied>
I mean as APS pranks go, it would probably be way better to just stick a regular cheap photodiode in an APD mount and make them think they destroyed an expensive detector for a few minutes when the HVPS overcurrent trips
<Ellied>
(it would only be a good prank at the APS, because they already destroy expensive detectors fairly frequently, and wouldn't feel too bad about it. Wouldn't do that at a university.)
<Ellied>
although really I wouldn't do any pranks at the APS as a student. :n
<Ellied>
but the avalanche transistor thing would be pretty good
<bofh>
yeah, it's quite clever
<bofh>
and diabolical
<bofh>
(heh, wonder why the APS goes thru detectors so quickly. high beam power?)
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<Ellied>
you only have to get unlucky once to kill a detector. It's just since they use them so constantly.
<kmath>
<rygorous> @stephentyrone If you're Alexander Grothendieck, anyway.
<Ellied>
right, so, I had this botfeature all set up and never actually deployed the bot to see it used:
<Ellied>
[citation needed]
<Lizzie>
IRC, Someone On. "Copernicus was Right, so I can be too: Why Ancient Suppression of Ideas is Relevant to Modern Physics." #kspacademia. Internet Relay Press, December 2014. Print. August 2017.
<Ellied>
I think the Em Drive was fresh in my mind when I wrote these
<bofh>
heh
<bofh>
also LOL
<bofh>
Amazing
<Ellied>
[citation needed]
<Lizzie>
IRC, Someone On. "Deferring the Burden of Proof by Gainsaying Occam's Razor." #kspacademia. Internet Relay Press, April 1934. Print. August 2017.
<Ellied>
It occurs to me that MLA-style citations may be less than appropriate for the topics of many of these, but they will do
<bofh>
[[Citation Needed]]
<Lizzie>
IRC, Someone On. "Why Good Anecdotal Evidence Always Trumps Data." #kspacademia. Internet Relay Press, October 1927. Print. August 2017.
<Lizzie>
IRC, Someone On. "Well, Actually, Your Opinion Doesn't Matter, Only Mine Does." #kspacademia. Internet Relay Press, July 1928. Print. August 2017.
<SnoopJeDi>
Lizzie! \o/
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<SnoopJeDi>
:(
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<Ellied>
I just had it running on my laptop. maybe I should punt it back over to my RPIserver
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<egg|zzz|egg>
[citation needed]
<egg|zzz|egg>
moo
<egg|zzz|egg>
!wpn UmbralRaptor
* Qboid
gives UmbralRaptor a europium tesseral dip pen
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<egg|cell|egg>
!wpn
* Qboid
gives egg|cell|egg a Cauchy foil which vaguely resembles a function
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<egg|work|egg>
!wpn Iskierka
* Qboid
gives Iskierka a recursive-descent barred spiral squirrel
<egg|work|egg>
bofh: so fwiw assuming that p = Mq' with a symmetric M, the derivative in a uniform boost of the Hamiltonian seems to be (the transpose of) the total momentum
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<UmbralRaptor>
booyay: moving van is delayed a day.
<bofh>
egg|work|egg: ahh. yeah that makes sense.
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<UmbralRaptor>
egg|work|egg: The cat returns!
<bofh>
!u ̂(x)
<Qboid>
U+0302 COMBINING CIRCUMFLEX ACCENT (◌̂)
<Qboid>
U+0028 LEFT PARENTHESIS (()
<Qboid>
U+0078 LATIN SMALL LETTER X (x)
<Qboid>
U+0029 RIGHT PARENTHESIS ())
<bofh>
!u ?
<Qboid>
U+1F335 CACTUS (?)
<bofh>
!u ̂?
<Qboid>
U+0302 COMBINING CIRCUMFLEX ACCENT (◌̂)
<Qboid>
U+1F335 CACTUS (?)
<bofh>
there we go
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<Qboid>
egg: Description: A Japanese H-2A rocket, designated H-2A F35, will launch the Michibiki 3 navigation spacecraft, the third member of Japan’s Quasi-Zenith Satellite System.
<egg>
UmbralRaptor: can you repeatedly ping me before the launch? or just talk about floating point :-p
<Thomas>
egg: Qboid can do that for you (assuming you get pinged when you get a pm): !kountdown -subscribe
<egg>
Thomas: Qboid will talk about floating point? :D
<Thomas>
No
<Thomas>
But it will remind you about the launch :D
<bofh>
egg|work|egg: so I legitimately am not sure if it's useful for any case other than the one you just gave.
<bofh>
but I think so.
<bofh>
(like I just haven't had a moment to think about how Noether's Thm applies to Hamiltonian Mechanics, but I suspect you're on the right path)
<bofh>
!wpn egg|work|egg
* Qboid
gives egg|work|egg a spiral muffin
<egg>
bofh: well I think it should apply just fine to Hamiltonian mechanics, it's just that boosting isn't a symmetry, it's something less nice (but still it feels like it is something, and maybe we could get something out of it?)
<egg>
bofh: also wrong egg
<bofh>
egg: noted
<bofh>
egg: also hmm
<soundnfury>
!wpn egg
* Qboid
gives egg a principal voulge
<egg>
bofh: also, for Noether's theorem for total momentum, let Σ3 be the matrix (id3, id3, id3, ...), then total momentum is Σ3 p = Σ3 (dH/dq)^T; translation invariance is dH(q+Σ3^T δq)/δq @(δq=0)=dH/dq Σ3^T=0, QED
<egg>
s/total momentum is Σ3 p/the variation of total momentum is Σ3 p'/
<Qboid>
egg meant to say: bofh: also, for Noether's theorem for total momentum, let Σ3 be the matrix (id3, id3, id3, ...), then the variation of total momentum is Σ3 p' = Σ3 (dH/dq)^T; translation invariance is dH(q+Σ3^T δq)/δq @(δq=0)=dH/dq Σ3^T=0, QED
<egg>
bofh: also I just realized that Σ3 vaguely looks like a cat face
<bofh>
dangit, no Belinsky or Lifshitz alongside that?
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<Ellied>
pf. My sister is making chocolate torte and listening to the New World Symphony in the kitchen, and the timer just went off, on-key, right in sync with a dramatic part of the music
<bofh>
NICE.
<egg>
!kd -subscribe
<Qboid>
egg: Added you to the Kountdown subscribers.
<egg>
UmbralRaptor: bofh: speaking of Nice, random factoid about the 3 Nice model papers (in Nature 435), the sum of the sizes of their reference lists is 69