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.
<bofh> so if your unicode is getting dropped
<bofh> !u ?₃
<Qboid> U+1D4AF MATHEMATICAL SCRIPT CAPITAL T (?)
<Qboid> U+2083 SUBSCRIPT THREE (₃)
<egg|zzz|egg> yes, but it has, in it, the face that you make when it is shown to you :D
<egg|zzz|egg> no I did get the rest
<egg|zzz|egg> but, (0,0).
<egg|zzz|egg> bofh: what is that, in saner notation?
<kmath> https://twitter.com/bofh453/status/922615751516835840 <bofh453> I swear I'm not making this up. https://t.co/qMXtOBDJVz
<bofh> I, uh, am actually still unsure. I *think* ISO(4)?
<egg|zzz|egg> bofh: waitwaitwait, it uses direct sums and calls the script letters algebras, so they're not Lie groups, right? it's the T that's a Lie group?
icefire has quit [Read error: Connection reset by peer]
icefire has joined #kspacademia
<egg|zzz|egg> bofh: also any idea about InfectedRaptor's precessing orbits? I'm really failing to find a frame where I can look at that sanely
<bofh> egg|zzz|egg: yes you're right, the scripts are the associated algebras.
<bofh> also I think all the frames you can view the problem in preserve insanity :/
<egg|zzz|egg> bofh: ... is insanity a first integral,
<InfectedRaptor> With sufficiently convoluted analytic solutions, yes.
<egg|zzz|egg> bofh: nah, it's ?₃ :-p https://twitter.com/bofh453/status/922618011189522433
<kmath> <bofh453> Sorry, I meant Lie ALGEBRA. The Lie Group is T₃.
<bofh> egg|zzz|egg: ?₃, T₃, close enough.
<egg|zzz|egg> bofh: at this rate T₃ is probably going to be the centre of ?₃ :-p)
<bofh> I hate you b/c I think you might even be correct.
<egg|zzz|egg> ....
<egg|zzz|egg> wat
<bofh> Help I'm trapped in notation concieved by Satan.
<egg|zzz|egg> WAT
<egg|zzz|egg> did I just guess the stupidest thing I could devise and get it right?
<bofh> OH FINALLY AT LEAST I HAVE SOME ANSWERS
<kmath> https://twitter.com/bofh453/status/922621050768252930 <bofh453> In case you're curious what *literally any of that is*, it's (clearly) this: https://t.co/3LINroBQ8S
e_14159 has quit [Ping timeout: 204 seconds]
e_14159 has joined #kspacademia
* egg|zzz|egg should sleep
<egg|zzz|egg> !wpn bofh
* Qboid gives bofh a mission
<egg|zzz|egg> !wpn whitequark
* Qboid gives whitequark a hypothetical checksum
<bofh> ooh, what's my mission? :P
<egg|phone|egg> ; mission
<egg|phone|egg> Argh
<egg|phone|egg> ;mission
<egg|phone|egg> ;mission
<kmath> egg|phone|egg: You cajole your scientific instrumentation into working by telling them that the flight computer is an iPhone. Having decided you're quite good at rocket science, you conclude that the next logical step is to start manufacturing electric cars as well.
<egg|phone|egg> Bofh: ↑
<bofh> I object I am NOT going to pull an Elon Musk.
<egg|phone|egg> ;mission
<kmath> egg|phone|egg: You try using kmath's ;mission function to plan your space program. Your legs are staged off below the knee.
<InfectedRaptor> ;mission
<kmath> InfectedRaptor: You catch your hair in the hatch as it closes, and are forced to spend the duration of the flight with your head stuck to the wall. You activate the self-destruct sequence and all's right with the world!
<InfectedRaptor> uhm
<bofh> ;mission
<kmath> bofh: You smuggle a bottle of 99% ABV münshine aboard. kmath's got 900 outcomes, but this ain't one.
<bofh> Nah, I much prefer 112% STBV sulfuric acid. :P
icefire has quit [Read error: Connection reset by peer]
<InfectedRaptor> Wait, 112%?
<bofh> 100% H2SO4 w/12% dissolved sulfur trioxide.
<bofh> It's known as "fuming sulfuric acid" and I think you can go up to ~30% dissolved SO3.
<InfectedRaptor> This sounds like RFNA, but with sulfur.
<kmath> <andrechemist> Idea for @ChemDraw: an animated Keck clip that gives tips on making structures. Can call it "Clippy".
<InfectedRaptor> "Pure disulfuric acid itself is a solid at room temperature, melting at 36 °C and rarely used either in the laboratory or industrial processes."
TechnicallyAsleep has quit [Ping timeout: 204 seconds]
* InfectedRaptor is amused at the relatively high melting point for some reason.
Technicalfool has joined #kspacademia
<InfectedRaptor> "When SO3 is added to water, rather than simply dissolving, it tends to form a fine mist of sulfuric acid, which is difficult to manage." Yet another reason chemistry is scary.
<bofh> "which is difficult to manage" ya don't say
<bofh> fun fact: highly concentrated sulfuric acid actually makes for a very good lubricant.
<InfectedRaptor> wait, what?
<kmath> <AndriErlingsson> https://t.co/onL59JB52p
<bofh> it's extremely highly viscous (hence "oil of vitriol") & in some cases one of few things that won't be eaten up by whatever nasty chemicals you're working with.
<InfectedRaptor> "Suppose you just hatched from an egg and don’t know anything about astrophysics. You brush off a loose feather and look at our solar system for the first time."
<InfectedRaptor> uh
<egg|phone|egg> Um
<kmath> <diodebot> Turing-Browning murder-depleted rectifier diode
InfectedRaptor is now known as UmbralRaptor
<UmbralRaptor> (I must be recovered; I'm having trouble sleeping again)
egg|zzz|egg is now known as egg|afk|egg
Technicalfool_ has joined #kspacademia
Technicalfool has quit [Ping timeout: 198 seconds]
egg|cell|egg has joined #kspacademia
egg|phone|egg has quit [Ping timeout: 183 seconds]
Technicalfool_ has quit [Ping timeout: 383 seconds]
egg|phone|egg has joined #kspacademia
egg|cell|egg has quit [Read error: Connection reset by peer]
egg|cell|egg has joined #kspacademia
egg|mobile|egg has joined #kspacademia
egg|phone|egg has quit [Ping timeout: 183 seconds]
egg|cell|egg has quit [Ping timeout: 204 seconds]
<egg|work|egg> !wpn Fiora, Iskierka, whitequark, et al.
* Qboid gives Fiora, Iskierka, whitequark, et al. a compression
<egg|work|egg> !wpn котя
* Qboid gives котя a Александров durandal
awang has quit [Ping timeout: 204 seconds]
awang has joined #kspacademia
<egg|work|egg> bofh: that thing with the stupid notations doesn't actually appear to have an upright T
<egg|work|egg> bofh: it *does* have an upright J
APlayer has joined #kspacademia
<kmath> <arxiv> In celebration of #openaccessweek, we continue to make all papers on #arXiv freely available to the world, all the time!
<egg|work|egg> !wpn UmbralRaptor
* Qboid gives UmbralRaptor a beryllium measure
<bofh> !wpn egg|work|egg
* Qboid gives egg|work|egg a gadolinium cathode zone
<egg|work|egg> happy user! https://forum.kerbalspaceprogram.com/index.php?/topic/162200--/&page=34&tab=comments#comment-3202433
<UmbralRaptor> !wpn egg|work|egg
* Qboid gives egg|work|egg a Lambert pigeon
<UmbralRaptor> bleah, tired
<kmath> https://twitter.com/rygorous/status/922703056701140993 <rygorous> it's got synmantax.
<bofh> egg|work|egg: oh my *fucking gods*. I think you're right.
egg|phone|egg has joined #kspacademia
egg|mobile|egg has quit [Read error: Connection reset by peer]
egg|cell|egg has joined #kspacademia
egg|phone|egg has quit [Read error: Connection reset by peer]
egg|phone|egg has joined #kspacademia
egg|cell|egg has quit [Ping timeout: 183 seconds]
<egg|phone|egg> !Wpn whitequark
* Qboid gives whitequark a fan
<egg|phone|egg> !Wpn GreeningGalaxy
* Qboid gives GreeningGalaxy a Yarkovsky gazebo which vaguely resembles a macropod
<APlayer> !wpn UmbralRaptor
* Qboid gives UmbralRaptor a charm basilisk
<APlayer> How are you?
<bofh> https://arxiv.org/abs/1710.08366 what the actual hell.
<APlayer> bofh: Is that peer-viewed and downloaded bi-anually?
<bofh> APlayer: which?
<APlayer> The last one, which you commented on as "what the actual hell"
<bofh> why bi-annually? it looks like a new paper.
<bofh> I mean the result isn't necessarily new (tho this seems to be a compilation of the best evidence yet)
<APlayer> Don't ask me why google gave me the mobile site
<bofh> LOL
<bofh> haven't seen that xkcd yet.
<APlayer> Well, I assumed this one should be well known in this channel :P
<APlayer> Reminds me, it was a while since Randall made any what-if articles
<APlayer> It's been*
<APlayer> English...
<bofh> Also damn, still no google search results for "sportpuddingzeit".
<APlayer> Huh?
<APlayer> Sportpudding?
<bofh> so now I'm using it as a way of figuring out how commonly google indexes both twitter & the Thomas-whitequark logs. :P
<APlayer> Shall I spoil it to you?
<APlayer> for you*
* APlayer curses his English
<bofh> Sure :P
<APlayer> Well, I may submit manually for Google crawling
<APlayer> Actually, I'd rather not, it wants me to link it to my account
<APlayer> Uh, so if I have a vector (0/0/1) in one coordinate system, the same vector in a differently oriented/mirrored system (for an easy example, let's say left handed and right handed) and an arbitary vector in the first coordinate system... How would I go about converting those?
<APlayer> Converting the vector from the first system to the second one, that is
egg|cell|egg has joined #kspacademia
egg|phone|egg has quit [Read error: Connection reset by peer]
egg|phone|egg has joined #kspacademia
egg|cell|egg has quit [Read error: Connection reset by peer]
<egg|afk|egg> UmbralRaptor: new type II cat observation
<UmbralRaptor> Yay, cat.
<egg|afk|egg> closest observation of a type II cat yet (nevertheless the two populations remain clearly distinct)
<APlayer> egg: As I understand it, it is able to harvest the complete food provided by its neighbourhood system?
<egg|afk|egg> nah, it's metal-poor
<egg|afk|egg> (or does it mean that it has hydrogen in its spectrum?)
<egg|afk|egg> UmbralRaptor: which classification are we basing this nomenclature on
<UmbralRaptor> egg|afk|egg: kinematics, as we do not have any spectroscopic data, and have not performed photometric analysis on existing data.
<UmbralRaptor> Uh, having hydrogen in a star's spectrum doesn't make it metal poor. More of a temperature vaguely near 10 000 K
<UmbralRaptor> Metal rich stars top out around 6-10% metals, IIRC.
<UmbralRaptor> (Ignore post main sequence mass loss, that's separate)
<egg|afk|egg> UmbralRaptor: no, mostly looking at supernova types vs. star populations
<egg|afk|egg> both of which have Very Astronomical Nomenclature
* egg|afk|egg gives UmbralRaptor a type II cake
<egg|afk|egg> !wpn whitequark
* Qboid gives whitequark a treasonous trie which strongly resembles a life
* UmbralRaptor eats 22/7 slices.
<egg|afk|egg> !wpn Fiora
* Qboid gives Fiora a Lyman truffle
APlayer has quit [Ping timeout: 183 seconds]
<UmbralRaptor> 1216-980 Å?
<egg|afk|egg> that's a smol truffle
egg|afk|egg is now known as egg
APlayer has joined #kspacademia
APlayer has quit [Ping timeout: 383 seconds]
<UmbralRaptor> !wa Lyman series
<Qboid> UmbralRaptor: hydrogen I (neutral hydrogen) | lyman series atomic spectral lines:
<bofh> oh great I've just been asked to implement numerically stable real-valued modified BesselK derivatives
<egg> bofh: :D
<kmath> <sbagley> V interesting point here: When lecture started, it was a revolutionary pedagogy designed to capitalize on the best… https://t.co/aVAbek5xUi
<bofh> I seriously hope they mean derivatives wrt x and not derivatives wrt \nu.
<UmbralRaptor> "Intelligence Community Virtual Career
<UmbralRaptor> Fair information:  http://www.icvirtualfair.com/
<UmbralRaptor> October 26, 2017, 2:00-8:00pm
<UmbralRaptor> "
<UmbralRaptor> uh
<egg> bofh: we clearly need to lure atlas here somehow
<egg> moar catpics?
APlayer has joined #kspacademia
<bofh> OH FUCK THESE ARE DERIVATIVES WRT \nu, KILL ME NOW.
* UmbralRaptor shoots bofh?
<egg> UmbralRaptor: wait, don't you usually stab
<UmbralRaptor> This would make a quick death easier, right?
<kmath> <mcclure111> This souvenir store sells "Mystery fire" https://t.co/cqFtBWKUmo
<egg> UmbralRaptor: ANBOcat is currently holding an issue of Nature
<egg> !wpn bofh
* Qboid gives bofh a recursive-descent IoT dildo with hard-coded credentials
<UmbralRaptor> egg: teach ANBOcat how to use sci-hub?
<egg> Ꙩ_ꙩ
<egg> !wpn bofh
* Qboid gives bofh an orientable pharmacy-like synapsid
<egg> !wpn UmbralRaptor
* Qboid gives UmbralRaptor a sharp conjugate nib
<UmbralRaptor> Ow
<bofh> pharmacy-like synapsid, eh? UmbralRaptor? :P
<egg> bofh: UmbralRaptor is a diapsid!
<bofh> *
<bofh> erm. hurr. mixed up syn- & diapsids.
<bofh> clearly I need more coffee.
<UmbralRaptor> dimetrodons are synapsids.
<egg> also cat.
<egg> s/t/ts/
<Qboid> egg meant to say: also cats.
* egg pets a dimetrodon
<UmbralRaptor> Yep
<kmath> <KarolShxdows> MOOD (Artista: Olga "AsuRocks" Andriyenko) https://t.co/7Ow9cE8MP4
<bofh> UmbralRaptor: same.
APlayer has quit [Ping timeout: 383 seconds]
<egg> whitequark: where does this december 2016 date format come from
<bofh> egg: Lem's Star Diaries
<whitequark> no
<whitequark> @atax1a
<bofh> ahh.
<egg> !wpn whitequark
* Qboid gives whitequark a ruby double 555 timer with a zone attachment
<kmath> <atax1a> #catte https://t.co/UWsmuvtMa0
<bofh> a double 555 timer, so you mean a 556? :P
<egg> !wpn котя
* Qboid gives котя a tantalum Lizzie
* egg always picks the wrong keyboard layout and starts typing κοτ
<egg> at which point the τ looks off :-p
<bofh> LOL
<UmbralRaptor> ꙮ_ꙮ
<bofh> oh gods, today I learned that iClicker is the result of my department.
<bofh> (literally, it was a startup made by 4 UIUC physicists in 1997)
<whitequark> the fuck is iclicker
<egg> whitequark: see, you were looking at the complexity of Principia's time handling a while back, but we're only doing the saner parts of it :D https://twitter.com/photoEphemeris/status/922540771793760258
<kmath> <photoEphemeris> In case you ever wondered why getting time zones and daylight saving time 100% accurate is an impossible task - fro… https://t.co/ZguhpJFJXn
<bofh> whitequark: this terrible thing where you show up to lecture, the prof asks you questions, you push buttons on a 433MHz ISM band remote control based on which of the answers you think it is or if it's true or false or w/e and this counts to like 5% - 10% of your grade.
<egg> bofh: I had never heard of this
<bofh> egg: lucky
<egg> I was happier never to have heard of it
<whitequark> bofh: wtf
<whitequark> bofh: the obvious choice is to sniff for it and then make a device that clicks the class consensus
<bofh> whitequark: yep, I did actually look at the packet format at some point and there appears to be zero crypto so this is indeed trivial to do.
<egg> whitequark: but what if the class is majoritarily wrong
<bofh> egg: who cares, statistically you're still going to get >50% results.
<bofh> egg: and some profs literally just use it as participation marks, in those cases you could literally just RNG the packets every time.
<whitequark> bofh: that shit can't possibly involve a public key cryptosystem
<whitequark> and everything else is likely trivially bypassable and/or breakable
<bofh> whitequark: there is literally none. packets are unauthenticated beyond a hard-coded remote id# and the key to packet mapping is obvious.
<whitequark> yeah I mean, that *concept* of a device
<bofh> ahh. yeah, you're right.
<whitequark> if you add PKI into it, its ROI becomes so far lower than zero
<whitequark> that no one is gonna use it
<whitequark> academia IT is nightmarish enough on its own
<bofh> Yep. Like it was already nontrivial to setup the infra for this from what I've overheard, in many places, PKI would require a total upgrade and break constantly.
<bofh> Plus there's no mass-market device that automatically does this for you, so you have to implement it yourself, at which point I will argue that if you're clever enough to do that you deserve not just the 5% or whatever, but more (and if it's an EE class, just pass the whole damn thing :P).
<bofh> Honestly the only way to dramatically decrease cheating rates in undergrad is to stop using BSc degrees as fucking certifications for employment/immigration.
<bofh> It would improve the quality of instruction dramatically, too.
<kmath> https://twitter.com/an_andrew_leach/status/922846322578939904 <an_andrew_leach> Sad to hear of the passing of Gilbert Stork who my favourite abstract: for his paper entitled The First Stereoselec… https://t.co/AzXngJzUy8
<egg> bofh: is strong prevalence of cheating at the BSc level a particularly US-specific thing? I wasn't particularly aware that it was a big thing here (but then I didn't actively look for that)
<egg> bofh: amusingly here evaluation was *entirely* at the end-of-semester (or in the first couple of years, end-of-year) exams, none of that midterm stuff (let alone clicky thingies counting for some part or whatever)
<egg> there was *one* course where they did a midterm iirc, but that was an oddity
<bofh> so I managed to get lucky in that only ~75% of my courses in my undergrad had midterms. only.
<bofh> egg: so keep in mind a lot of it is also in US/CA if you're on a student visa renewal of that is tied to continued academic success. so if you fail a term you very easily can (and often do) get deported, even if otherwise you still are in good standing with the university (often you are allowed to go back if the university okays it, which they do, but if you basically don't start this process literally
<bofh> immediately you prolly will be doing it from ...
<bofh> ... PRC or whereever your primary place of citizenship is from).
<bofh> I'm not 100% sure on the precise specifics but there is a *lot* of pressure on international students in undergrad. And locals are lazy but still realize they need the fucking certificate despite the fact that they don't care about the material (and often rightfully realize that they won't need it in their chosen careers much, and what they do need they can just learn at those times).
<egg> bofh: in france they tend to be fairly serious about preventing cheating, so you write national exams on standardized anonimizable paper given to you at the exam, and you have coloured draft paper (two colours for the room, all your neighbours have the other colour)
<bofh> So yeah, I think it's a North American thing but it really is pervasive.
<egg> at ETHZ it was just "bring x pages of notes, and your own paper" :-p
<bofh> Heh. In my case it was just paper was handed to us and collected afterwards, but for open-book finals we could bring any notes, and otherwise we often could fill out a single sheet with whatever we wanted on it.
<Fiora> i don't think it's particularly pervasive here insomuch as colleges will expel the hell out of you for it
<Fiora> like, people do cheat, but it's not considered a matter of "cheat or die", but rather "cheat at your own risk"
<bofh> ^
<Fiora> if you want somewhere that cheating is absolutely pervasive, try india
<egg> oh yeah
<bofh> Speaking of which, I found my Real Analysis 1 final exam, with the funniest set of instructions on it.
<bofh> And yeah, India is... it's really something else.
<egg> :D
<Fiora> *that's* pervasive cheating, i.e. everyone is practically expected to cheat, even if they're extremely smart and good at the material
<Fiora> i think it also depends on the school. some are more tolerant, others less so
<Fiora> here, that is
Technicalfool has joined #kspacademia
<egg> bofh: I do like the idea of the 2-coloured draft paper tho (also the anonymous paper is cool, you write your name and other identifying information onto a corner whose back is black and glue that folded)
<egg> bofh: well there's also this format https://static.intellego.fr/uploads/1/4/142788/media/600_001%20(2).jpg but it seems less elegant
<bofh> the bicolour draft paper is neat but I'm not sure what problem it solves.
<egg> bofh: student exchanging sheets
<bofh> IME most exam-time cheating is either "person looking over at other person's paper" or "person consulting $smartphone, either surreptitiously or in $restroom or w/e"
<egg> bofh: so the tables are spaced far enough to make the first infeasible; most of those procedures were designed before the second was a problem
<egg> but when I took the bac I had to surrender my phone at the entrance and pick it back up when leaving
<bofh> Heh. That actually is reasonable.
<egg> bofh: some of these procedures are really thorough because there are some exams in france that mean you get some administrative job, so contestations of the exam results go to the administrative tribunal and everything is a mess
<bofh> https://mobile.twitter.com/angealbertini/status/922918087598391296 aw come on, wasted opportunity to implement H-E and A-D ligatures. :P
* egg pokes Fiora with transfinite induction
<egg> bofh: anecdote re. transfinite induction; I asked Marc Burger (back before I went to ETHZ, but I knew him because his stepson went to the same school) whether he could recommend a book in German, so I could learn some German
<egg> bofh: he recommended Moderne Algebra :D
<egg> bofh: not sure I learned much *useful* german from that, but I sure learned some maths
<egg> bofh: in particular even the mathematical terminology changed (Bourbaki!)
<egg> bijektiv was eineindeutig, etc.
<bofh> LOL
<bofh> Wow, that's interesting and honestly kind of surprising.
<egg> bofh: but hey, that's where I learned about transfinite induction :D
<kmath> <joelgrus> Bears repeating: ...
<kmath> ... ????????????????????????????????????????????????????????????????????????????????????????????????????????? ...
<kmath> ... ????????????????
<egg> cc UmbralRaptor
<Fiora> egg: wah?
<kmath> <stephentyrone> The problem with explaining non-computability of the reals is that we can’t even describe almost all the non-computable numbers.
<Fiora> oh of course
<egg> so you know this stupid induction joke that proves that all natural numbers are interesting?
<UmbralRaptor> egg: while(1) { ???(); }
<egg> with the axiom of choice and transfinite induction, all reals are interesting! :D
<egg> (but you can't describe almost all of them :D)
UmbralRaptor has quit [Quit: *BAMF!*]
<egg> D: the raptor has bamfed
* soundnfury gives egg a well-ordered klavier
UmbralRaptor has joined #kspacademia
<egg> UmbralRaptor: you bamfed
<UmbralRaptor> egg: I blame 99942 Apophis.
<kmath> <PulpLibrarian> #MyPerfectDayIncludes Spacecat! https://t.co/Fn2Ufnlfac
<kmath> <IBJIYONGI> THE PURPLE IS INTEL AS OF LAST WEEK SCIENCE! https://t.co/TjraS09Qi9
icefire has joined #kspacademia
<SnoopJeDi> bofh, Mars in that comic seems scarptical
egg is now known as egg|z|egg
egg|z|egg is now known as egg|zz|egg
egg|zz|egg is now known as egg|zzz|egg
<egg|zzz|egg> !wpn UmbralRaptor et al.
* Qboid gives UmbralRaptor et al. a thallium perfluorocarbon
<UmbralRaptor> Uh
<UmbralRaptor> !wpn egg|arXiv|egg
* Qboid gives egg|arXiv|egg a thallium snail which strongly resembles a µa741
<bofh> !wpn egg|arXiv|egg
* Qboid gives egg|arXiv|egg a polygon with a ringularity attachment
<bofh> "ringularity"?
<soundnfury> I'm guessing either a ring-shaped singularity, or maybe a singularity in the frequency domain ("ringing")?
<soundnfury> !wpn bofh
* Qboid gives bofh a botfly