2017-03-25 23:51
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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<
GreeningGalaxy >
!wpn egg
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* Qboid
gives egg a pressurized yxala/edge hybrid
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bofh >
holy fuck you can get bibtex directly from dx.doi.org via wget
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<
GreeningGalaxy >
:0
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<
kmath >
<cgranade> Biblio trick of the day:
https://t.co/HglLow2cls generates BibTeX directly! $ wget --header="Accept: application/x-bibtex; charset=utf-8"
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<
GreeningGalaxy >
!wpn
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* Qboid
gives GreeningGalaxy a demi-cannon
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soundnfury >
!wpn bofh
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* Qboid
gives bofh a tungsten fish
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<
soundnfury >
it's a Whaddock!
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<
whitequark >
egg|zzz|egg: we were just discussing physics and I translated "rotoinversion" as "ротоповорот"
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<
whitequark >
this is incredibly funny actually
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<
whitequark >
anyway
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<
whitequark >
!wpn egg|zzz|egg
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* Qboid
gives egg|zzz|egg a nukular float ℻
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<
e_14159 >
Do you know what the biggest practically-achievable f-number for a lens is?
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<
Iskierka >
biggest n in f/n or biggest aperture?
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<
e_14159 >
The former.
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<
Iskierka >
presumably planck length / universe radius, in theory, then?
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<
e_14159 >
Let's call this a first upper bound :-)
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<
Iskierka >
smaller just matters how much you can make the hole smaller with a longer focal length
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<
GreeningGalaxy >
sticking universe radii and planck lengths into optics models seems like it's not going to end happily
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<
Iskierka >
okay, so smallest hole you can reliably get your choice of light through
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<
GreeningGalaxy >
MARS! [mars.]
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<
UmbralRaptor >
e_14159: So large as to be a huge hassle to use.
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<
UmbralRaptor >
Lots of small refractors right now are about 10-15, and I think you can find some f/20s
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<
UmbralRaptor >
Historically, telescopes went even longer due to optical problems of the era,
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<
Iskierka >
really when you have reflectors and correct focal distance is there any reason to go for larger f-stop?
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<
UmbralRaptor >
Very bright objects.
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<
Iskierka >
shorter exposure
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<
UmbralRaptor >
… I may have misunderstood Iskierka's question.
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* UmbralRaptor
thinks ? not ?
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<
UmbralRaptor >
related: will any of you be near Lawrence on Saturday or Rolla on the 21st/22nd?
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<
UmbralRaptor >
*unrelated
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<
Iskierka >
UmbralRaptor, or both. so long as what's on the other side won't get vaporised, why not go as big as you can always?
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<
UmbralRaptor >
Serious answer: cost, more hassle, saturating detectors on bright objects.
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<
UmbralRaptor >
So, yes. As big as possible.
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<
SnoopJeDi >
3-day workshop with 1 talk per day o.O
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<
UmbralRaptor >
SnoopJeDi: Spend the rest coding?
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<
SnoopJeDi >
It's an HET workshop so I won't get anywhere near it for hygiene reasons ;P
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<
UmbralRaptor >
HET?
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<
UmbralRaptor >
High Energy Thaumaturgy?
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<
SnoopJeDi >
high energy theory, sorry
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<
egg|cell|egg >
!Wpn Iskierka
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* Qboid
gives Iskierka an erbium unremarkable king
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<
soundnfury >
!wpn egg|cell|egg
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* Qboid
gives egg|cell|egg an exponential cardioid
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<
UmbralRaptor >
!wpn egg|cell|egg
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* Qboid
gives egg|cell|egg an Abelian operator/bomb hybrid
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<
UmbralRaptor >
!choose Nature|Science|Cell
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<
Qboid >
UmbralRaptor: Your options are: Nature, Science, Cell. My choice: Cell
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<
egg|cell|egg >
Nature
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<
UmbralRaptor >
The correct answer
*should* be arXiv.
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<
soundnfury >
UmbralRaptor: no, the correct answer is always snarΧiv :P
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<
egg|cell|egg >
UmbralRaptor: nature's links to scihub
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<
UmbralRaptor >
Oh, hey. MO legislature is going to cut UM system budget and use the money to advertise to get more retirees to move here.