raptop 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. | We can haz pdf
_whitelogger has joined #kspacademia
<UmbralRaptop> egg: the only thing interesting about the time was that it was a bit late.
<egg> UmbralRaptop: speaking of which
* UmbralRaptop passes egg a tray of stimulants.
<egg> bofh: of course, when I integrate longer, I get moar secular effects so increased uncertainties on the mean.....
<egg> bofh: UmbralRaptop: https://hastebin.com/oziyilesaw.txt
<egg> I guess at sufficiently long timescales this gets all kozaied
<bofh> egg: I mean most of the error seems to be on the jump from 10 to 100 orbits?!
<egg> bofh: well yes because 10 is too smol a sample size to decently estimate the autocorrelation etc.
<egg> bofh: big errors at smol sample sizes are not uneggspected
<egg> bofh: but because secular effects are a thing, we start noticing an error when the sample size increases sufficiently
<egg> bofh: so at 30 000 orbits (which is a lot, that's a молния) we're back to 2 sigdec on the sidereal period!
<bofh> Huh.
<bofh> That's not bad, actually.
<egg> bofh: except that points out that computing the sidereal period is a shitty way of testing for synchronicity
<egg> at two sigdec on 40 years you can be off by quite a bit more than a day and thus be very much not synchronous
<egg> (well, semisynchronous here)
<bofh> Yeah, that is a good point. Huh.
<mlbaker> bofh: thanks for recommending boyd rofl. beginning to see what all the fuss is about / what i've been missing all these years...
<bofh> mlbaker: I also recommend Nocedal & Wright for numerical implementation, but yeah, Boyd is great.
<mlbaker> ah yeah, apparently that was used in continuous
<egg> nocedal sounds like a medication name
<egg> mlbaker: bofh: recommending boyd?
<mlbaker> Boyd's Convex Optimization
<kmath> <bofh453> K. L. Tsakmakidis, R. W. Boyd et al, "Breaking Lorentz reciprocity to overcome the time-bandwidth limit in physics… https://t.co/Z8jDBc3mlJ
<bofh> egg: no, different Boyd
<bofh> I actually had to look that up, fun fact, since I thought the same at first.
UmbralRaptop has quit [Remote host closed the connection]
UmbralRaptop has joined #kspacademia
e_14159 has quit [Ping timeout: 190 seconds]
e_14159 has joined #kspacademia
_whitelogger has joined #kspacademia
<UmbralRaptop> I swear this is a real sign. https://photos.app.goo.gl/PDQQyYxMdf6wmUhs9
<UmbralRaptop> bofh: So, you know the deriving time dilation with triangles? https://photos.app.goo.gl/NGEb5YZYpDYWo3WDA apparently we have a homework problem that requires doing that but where the light clock is in line with the motion.
<UmbralRaptop> (Problem isn't due for a while, so eh)
<bofh> UmbralRaptop: ...yuck, that looks positively vile.
<UmbralRaptop> Like doesn't length contraction break it?
egg|cell|egg has quit [Ping timeout: 183 seconds]
<bofh> UmbralRaptop: I uh, I'm pretty sure it would, yeah.
* UmbralRaptop 𒄈 things
_whitelogger has joined #kspacademia
_whitelogger has joined #kspacademia
_whitelogger has joined #kspacademia
Ellied has quit [Ping timeout: 180 seconds]
Ellied has joined #kspacademia
Ellied has quit [Ping timeout: 198 seconds]
Ellied has joined #kspacademia
<egg> UmbralRaptop: bofh: why would it break anything? this seems farily straightforward?
<egg> UmbralRaptop: bofh: if v is the speed of the clock and l' its length in the same reference frame, the round-trip time is l' / (c - v) + l' / (c + v); let l' = l/γ with l the rest length and γ the lorentz factor, this is equal to γ 2l/c so you recover time dilation
_whitelogger has joined #kspacademia
_whitelogger has joined #kspacademia
egg|cell|egg has joined #kspacademia
<egg|cell|egg> Also they give the original name of all the example satellites which is very https://mobile.twitter.com/whitequark/status/994673480409874432
<kmath> https://twitter.com/whitequark/status/994673480409874432 <whitequark> some people make authentic representation of names very seriously https://t.co/eY6blu9t5o
* egg|work|egg pokes UmbralRaptop with a clock
* egg|work|egg stares at code points 1F100, 2488..2490 and 1F101..1F10A of the UCS
<egg|work|egg> aha, compatibility with ARIB https://www.unicode.org/L2/L2008/08077r2-japanese-tv.pdf
<UmbralRaptop> egg|work|egg: soon. Going to spend the morning panicking about stellar activity indicators.
<egg|work|egg> UmbralRaptop: what have they done?
<UmbralRaptop> They seem poorly measured for some of my stars.
<UmbralRaptop> Also, I may want to convince my advisor that we should use a different one than currently.
ferram4 has quit [Read error: -0x1: UNKNOWN ERROR CODE (0001)]
<SnoopJeDi> bofh, I don't know if you read NPR but they did a story yesterday on underground urbex including Paris https://www.npr.org/2019/01/28/689273526/underground-digs-up-the-secrets-of-hidden-communities-around-the-world
<SnoopJeDi> read/listen
_whitelogger has joined #kspacademia
<bofh> SnoopJeDi: I do not, ooh this looks potentially interesting.
<kmath> <QuantPhComments> Old habits die hard. All the same, there are commands, classes and packages which are outdated and superseded.
<SnoopJeDi> I only heard the end of the segment on the radio last night ("we hoped it wouldn't rain while we were down there"), but of course immediately thought of you
ferram4 has joined #kspacademia
<bofh> ahahahahahaha they used the Montparnasse entrance. good, that's the correct one.
<SnoopJeDi> :o a collaboration whoa
<SnoopJeDi> unrelated: I just got my acceptance email to ComSciCon Houston! \o/
<bofh> (everyone knows about the Petite Ceinture one but that one quite frankly *sucks*, you get to walk thru tons of inundated galleries before you get to the interesting bits of the quarries)
<bofh> (you can bypass some of that by shortcutting thru a fontis but that has its own unpleasantries)
<bofh> "Meet the cataphiles: Gilles Thomas is the author of Atlas du Paris Souterrain."
<bofh> LOL I MET HIM
<bofh> by Aspairt's gravestone on Nov 03rd, at that, lmao.
<bofh> Huh, I don't think I have any pics of the Rue Vaugirard marker.
<SnoopJeDi> haha, I'm glad my intuition guided me correctly here :)
ferram4 has quit [Ping timeout: 202 seconds]
ferram4 has joined #kspacademia
<egg|cell|egg> Bofh: orbits!
<egg|cell|egg> Bofh: rootn!
<bofh> SnoopJeDi: I have a few of ones nearby, like https://i.imgur.com/cazhwjG.jpg
<bofh> (also extra amusement for the signmaker running out of room on the last word there and having to awkwardly squeeze in that final T)
<bofh> egg|cell|egg: gotcha >_<
<bofh> I should poke at the masons
<bofh> mascons*
<bofh> typing/hard/shopping
<egg|cell|egg> Bofh: 喵喵喵!
<UmbralRaptop> meowcons
<kmath> <ZiglerLab> Cat whiskers are great. I use my cats’ whiskers to split a laser pointer and demonstrate the 2-slit experiment. Whi… https://t.co/cqRpdBJHn6
_whitelogger has joined #kspacademia
APlayer has joined #kspacademia
<UmbralRaptop> egg: how busy will you be circa March 15-17 or 21-23?
<UmbralRaptop> hrm
<egg> UmbralRaptop: um
<UmbralRaptop> That's ominous.
<egg> UmbralRaptop: let me check some dates
<egg> UmbralRaptop: 15-16 I am mostly airborne
<egg> 17 I should be back in zurich
<egg> UmbralRaptop: are you going?
<egg> UmbralRaptop: we can certainly meet 21-23, maybe 17 but I'll be tired
<egg> UmbralRaptop: don't think I can easily go there after work during the week because it looks like the middle of nowhere, maybe I can spend a day working from trains to visit you over there
<UmbralRaptop> Also trying to figure out if it makes sense to eg: spend a day in Zurich after it.
<egg> UmbralRaptop: certainly makes sense to spend the week-end in zurich
<egg> UmbralRaptop: yeah it's 3 h for me to go there so I can easily meet you there
<bofh> egg: where are you flying to, anyhow?
<egg> bofh: ZRH
<bofh> okay, where are you flying FROM, then
<egg> :-p
<egg> VN
<egg> from VVTS via WSSS
<egg> bofh: yes i am mixing IATA and OACI codes because i am a troll
<bofh> oh, SGN via SIN?
<egg> bofh: yes :D
<egg> to LFZH
<egg> LSZH rather
<egg> I'm not in FR
<UmbralRaptop> Oh
<egg> UmbralRaptop: ?
<egg> bofh: also LFCR is an ИКАО code
<egg> bofh: clearly one should use that as a line separator
<bofh> clearly.
<UmbralRaptop> obviously
<egg> bofh: UmbralRaptop: it's a more accurate representation of what happens on my typewriter than CRLF
<UmbralRaptop> egg: sorry, time/location error. For some reason I read that as you being in VN right now.
<egg> pushing on the handle *first* turns the roll, then the carriage starts moving
<egg> UmbralRaptop: ah
<egg> no, I'm in CH
<egg> I'll be in FR at the end of the week
<egg> then back in CH
<egg> then in VN (via SG) around the 23rd
<egg> then back to CH essentially when you come here
<egg> UmbralRaptop: I land saturday morning
<UmbralRaptop> Sat 16, and Sat 23?
<egg> UmbralRaptop: yes but sat 23 february and sat 16 march
<UmbralRaptop> aaaaa
<egg> UmbralRaptop: I'm in VN 20190223/20190316
<egg> UmbralRaptop: basically for your porpoises, I appear on the 16th of march in the morning, but probably tired because long long flight
<egg> UmbralRaptop: but I can easily go to where you are in the middle of nowhere, it takes 3 h of train + bus
<UmbralRaptop> hrm
<egg> UmbralRaptop: it probably makes sense for you to spend the week-end in zurich or something though
<egg> (the week-end of the 23rd)
<egg> (march)
* UmbralRaptop would like to see the 1e-9 scale planets >_>
<UmbralRaptop> Yeah, probably
<bofh> "long long flight" lmao
<bofh> UmbralRaptop: Planetenweg is fun, highly recommend.
<bofh> UmbralRaptop: Do Not Taunt The Cattle Fences, tho.
<UmbralRaptop> Hah!
<egg> UmbralRaptop: yeah, they're effectively in zurich, so we can visit them if you come by
<egg> ah it's actually train train train not train train bus
<UmbralRaptop> How many bits in a train?
<egg> you can do train train train bus but it's < 600 m from the train station to your hotel so no real need to bus
<UmbralRaptop> Yeah, that's fine. train ↔ hotel for Eggsoplanets II was ~1100 m.
<egg> UmbralRaptop: so yeah, I can visit you sometime during the week and then you can spend the week-end in zurich and we can go see the nanoplanets
APlayer has quit [Read error: Connection reset by peer]
<kmath> <omajestic> An american obsessed with French culture is just a ouib
<bofh> UmbralRaptop: ...I should RT that.
<bofh> it's accurate!
<UmbralRaptop> :D
<UmbralRaptop> "The Fly America Act is a federal regulation that states that all (domestic and international) air travel that is financed by federal funds must be booked on U.S. Flag Air Carriers, regardless of cost or convenience. This regulation must be followed by all George Mason University personnel, students, trainees, consultants and collaborators who are reimbursed for air travel with federally primed or federal pass through fund
<UmbralRaptop> … okay, then.
<egg> Ꙩ_ꙩ
<egg> UmbralRaptop: alternatively, while you're in zurich for the week-end, look for a phd position there >_>
<UmbralRaptop> Note that Kevin Schawinski is no longer at ETHZ. Or in academia.
<bofh> who is that?
<egg> bofh: the crow
<egg> UmbralRaptop: yes but there are still astronomers
<bofh> egg: OH
<egg> UmbralRaptop: you'll even meet some
<UmbralRaptop> hm
<UmbralRaptop> bofh: he did some of the galaxy zoo papers
<kmath> <eggleroy> @volatile_void I keep reading "tgmath.h" as having something to do with the tangent... ⏎ ⏎ // tgmath.h ⏎ #include "math.… https://t.co/Ua9y4nu0TH
pizzaoverhead has joined #kspacademia
ferram4 has quit [Read error: Connection reset by peer]
ferram4 has joined #kspacademia
pizzaoverhead has quit [Quit: Leaving]
<egg> bofh: your calendar is still full of recurring paris nonsense
<egg> bofh: have you considered cleaning up your calendar
<bofh> egg: I thought I did, what the hell. Let me poke at that now, I guess, since I have some sudden free time
<bofh> (classes cancelled tomorrow)
<egg> bofh: ah because you are on mars
<egg> (I assume that's the reason for class cancellation?)
<bofh> yes
<bofh> no, actually, it's warmer in Gale Crater than Urbana-Champaign currently.
<mlbaker> bofh: oh right, other schools actually close :P
<bofh> mlbaker: yeah I know, it's so disorienting
<bofh> mlbaker: for bonus points I am actually on-campus (and prolly overnighting)
<UmbralRaptop> Does Waterloo never close, or something?
<bofh> Yes.
<bofh> I know of two closures in a decade.
<egg> bofh: do canadians go to school on rovers
<bofh> egg: I know someone that skiied to campus
<mlbaker> it's basically just Waterloo...
<mlbaker> other (sane) canadian schools gladly close
<egg> mlbaker: are there ones that are in cities, or are they all campusish? I'd expect something in a city to be able to remain open
<UmbralRaptop> So my advisor RT'd this, and it's oddly reassuring https://twitter.com/AlexaLFH/status/1089980528114221056
<kmath> <AlexaLFH> a deep grad school truth: when you feel like you have nothing to show your adviser is when you most need to meet wi… https://t.co/ieUMOazFJn
<mlbaker> egg: there are a lot of urban campuses yeah eg UToronto, McGill
<mlbaker> huh, wiki classifies waterloo as urban O_o
* UmbralRaptop is confused by egg's distinction.
<mlbaker> (the university, that is)
<egg> UmbralRaptop: as in, ETHZ doesn't have a campus
<egg> well, the physics dept has a campus on a nearby mountain
<UmbralRaptop> It's just scattered around Zurich?
<egg> but most of it is building scattered around town, yes
<UmbralRaptop> (Sort of like NYU)
<mlbaker> ah
<mlbaker> yeah this is usually the case for schools in big cities
<egg> UmbralRaptop: there is the physics campus here on the mountain https://www.google.com/maps/search/eth+zurich/@47.4082284,8.507134,17.1z
<mlbaker> well, McGill is sort of contiguous but they've owned that land for a long time iirc (smack in the middle of downtown montreal)
<egg> the darkest ones, the slightly lighter dark are university of zurich which is different
<UmbralRaptop> aaaaa