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.
<UmbralRaptor>
Apparently the moon is way lower than I thought.
* UmbralRaptor
does not low at the moon.
<egg>
UmbralRaptor: please do not alter the path of the moon as it would interfere with principia releases
<UmbralRaptor>
egg: but it would be really convenient to move the path of totality through Fairfax!
<egg>
UmbralRaptor: so um as long as you keep the conjunctions at the same time I guess I'm fine
<egg>
but with the very-third-body movement seems hard to find another orbit with the same conjunctions?
<UmbralRaptor>
(The whole GMU thing means my eclipse viewing is going from "winging a day trip to KC or Rolla" to "probably not, unless someone else has plans I can ride on")
<soundnfury>
Iskierka: I mean, he's right. The representation gap on CS _does_ result from biological differences [from a population statistics perspective] between the sexes
<soundnfury>
This is not the same as claiming women are less qualified than men (as the Vice article puts it); that's a statement about _individuals_.
<soundnfury>
instead, there are _fewer_ women than men capable of working in the field (note that it's capability, not qualifications, that really matters), and of those who are, fewer of them _want_ to, because of differences in psychology of motivation
<soundnfury>
really, on this issue it's those who reject the idea of there ever being mental differences between the sexes who are the science deniers
<soundnfury>
</rant>
<soundnfury>
(we now return to your regularly scheduled pictures of Grothendieck cats)
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<icefire>
clf3 is a horrible, horrible substance
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<Fiora>
okay, sure, clf3 is bad
<Fiora>
but what about clf5
<Fiora>
that's even more fun
<egg|zzz|egg>
Fiora: oh they wanted to use it in Clementine iirc?
<Fiora>
i still cannot believe that someone was like
<egg|zzz|egg>
nay Clementine 2
<Fiora>
chlorine trifluoride is great
<Fiora>
LETS FLUORINATE IT
<egg|zzz|egg>
:D
<Fiora>
AT HIGH TEMPERATURES AND PRESSURES
<Fiora>
and not only that, they discovered a catalyst
<bofh>
Nickel Difluoride iirc?
<Fiora>
yup
<Fiora>
nickel(II) fluoride
<bofh>
I'm still amused at the series of Fluorine Oxides, it's as if someone kept asking A.G. Streng "that's good, but can you add *moar* Oxygens?"
<bofh>
I don't think I was able to find a synthesis of O5F2 but let me check again.
<bofh>
They're great if you want to violently explode things at cryogenic temperatures.
<bofh>
also that video is nothing short of hilarious/horrifying.
<egg|zzz|egg>
Fiora: I like that in that video they disappointedly say "not much happened, there was no explosion" after the clean leather sample
<bofh>
egg|zzz|egg: OHH THAT'S WHAT THEY SAY
<egg|zzz|egg>
and then the conclusion "with a leather suit you have about 7 seconds to get out"
<bofh>
but now you have exposed skin and that seems like not an improvement :P
<egg|zzz|egg>
also, the start of the video says its staff training at COGEMA
<egg|zzz|egg>
what does their staff do
<bofh>
COGEMA?
<Qboid>
bofh: [COGEMA] => COmpagnie GÉnérale des MAtières nucléaires
<kmath>
<anisotropi4> @FioraAeterna Highlights for me are the jazz flute noodling and the commentors' apparent disappointment that dry leather doesn't explode
<bofh>
egg|zzz|egg: the jazz flute makes it
<bofh>
oh, 12BN6 came in in one piece. time to use it in some terrible audio effects circuitry >:D
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* UmbralRaptor
totally misread that as B12N6, and assumed bofh was going to explode something.
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<egg|zzz|egg>
UmbralRaptor: cat!
<egg|zzz|egg>
UmbralRaptor: hm, https://github.com/pdn4kd doesn't list all your affiliations, it's missing NAFO :-p
<UmbralRaptor>
NAFO doesn't lend itself to github repos.
<kmath>
YouTube - How Does Launching From Equator Help Rockets?
<Technicalfool>
(he's referring to the "Mechjeb developer" calling him stupid)
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<Sarbian>
Technicalfool: I am watching. I feel I won't like that
<Technicalfool>
heh, he's on about there being no method in mechjeb to combine manouevers, that he knows of. But the dev will surely correct him and call him stupid.
<Sarbian>
If only that button had been added 13 days ago.
<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>
Sarbian: ^
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<Sarbian>
I am not awake at that time ;p
<egg>
Sarbian: hm
<egg>
Sarbian: it gives UTC+2 though afaict
<egg>
(which might be a bug)
<egg>
Sarbian: also, "il est 5 heures, Paris s'éveille"
<egg>
Thomas: can you indicate the timezone of the time you give? it's very convenient for Sarbian or you or me, but for others on this channel UTC+2 without mention of the timezone might be confusing
<Thomas>
It is "DateTime.UtcNow" so shouldn't it be UTC-0?
<Sarbian>
egg: for me it's "il est 5 heures et j'ai encore 4H de sommeil"
<egg>
Thomas: oookay so then there's a bug in the date *parsing*
<Thomas>
?
<egg>
Thomas: please use DateTimeOffset
<egg>
DateTime doesn't know whether noon is in Saigon or in Bourg-en-Bresse
<egg>
DateTimeOffset contains its offset from UTC
<egg>
(also add e_14159 and Stratege to the logical disjunction above they're in CEST too)
<e_14159>
egg: Now find a regex accepting a username in this channel iff they're on CEST.
<egg>
aaaa
<Thomas>
Hmm, I dont quite understand the difference between using DateTimeOffset and using DateTime and just treating all times as UTC times
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<bofh>
18:16 <@Fiora> because it's fairly clear 98% of people interested in chemistry literally have only read that one blog
<bofh>
what kind of really irks me are the folks that not only have only read that one blog, but only that one column on that blog
<bofh>
since they don't seem to care about any of the (quite fascinating honestly) med-chem posts on there it seems.
<egg>
!wpn bofh
* Qboid
gives bofh a rubidium 555 timer
<egg>
!wpn UmbralRaptor
* Qboid
gives UmbralRaptor a tellurium labeled gluon
<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>
it's this one ^
<UmbralRaptor>
Seems a bit eggcentric also?
<egg>
UmbralRaptor: well yes
<egg>
UmbralRaptor: there would be no point in the молняlike inclination otherwise
<egg>
(that Cyrl custom layout was a worthwile time investment :-p)
<UmbralRaptor>
bofh: The Alzheimer's results there are depressing, though.
<kmath>
<MicroSFF> The killer drones assessed the others' capabilities and ran simulations. "You'll win." "Marginally." "Is it worth it?" "Disengaging." "Bye."
<bofh>
UmbralRaptor: Alzheimer's is depressing, full stop.
<bofh>
21:33 * Qboid gives bofh a rubidium 555 timer
<bofh>
I have one of those, it's called an FE-5680A
<bofh>
it's amazingly stable as a 10MHz sinewave reference.
<UmbralRaptor>
bofh: yeah, but that there apparently have been huge treatment efforts with basically no successes.
<bofh>
UmbralRaptor: like that's what I've meant. we have no fundamental idea what is going on at a low level or why, and for all we know once symptoms/pathology sets in it's too late to do much.
<egg>
bofh: background: we have RigidMotion, which can transform DegreesOfFreedom (a Position and a Velocity) from one reference frame to another (at a fixed time). It is possible to access the orthogonal map of the RigidMotion (what happens to the basis alone), because I think that makes sense/is well-defined/something. It is all too easy to transform a Velocity by that and get a Velocity (extracted from DegreesOfFreedom) in
<egg>
the right frame although it's not the right velocity (because that velocity shouldn't transform linearly)
<bofh>
Oh, so RigidMotion is just a Galilean Transform?
<egg>
bofh: it's the derivative of a RigidTransformation
<bofh>
that was actually going to be exactly my next question so :P
<bofh>
!u ??
<Qboid>
U+1D598 MATHEMATICAL BOLD FRAKTUR SMALL S (?)
<Qboid>
U+1D52C MATHEMATICAL FRAKTUR SMALL O (?)
<egg>
bofh: what was your question exactly?
<bofh>
why is it true for certain that angular velocity vectors lie in the tangent space here
<egg>
ah :D
<egg>
bofh: also, crap, that's a bold s and a non-bold o, what have I done
<bofh>
Yeah, I did !u to make sure I wasn't hallucinating the non-bold o
<bofh>
:P
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<egg>
bofh: well I guess that's an issue I'll need to fix :-p Anyway the question is whether there's some operation that I should forbid or some algebraic structure that's almost-but-not-quite a vector or something that I cuold have so I don't do that by mistake
<egg>
which seems tricky: DegreesOfFreedom is the tangent bundle of Position, and tangent vectors are vectors surely...
<egg>
and the orthogonal_map of the RigidMotion does make sense on vectors, that's what happens to e.g. a displacement
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<Fiora>
are there any notable common metals that are reacted with by methyl ethyl ketone, cyclohexane, tetrahydrofurane, or acetone