egg|nomz|egg 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.
<kmath>
<christinelove> who the fuck is scraeming “WE LOVE YOU, PLEASE TAKE CARE OF YOURSELF“ at my house. show yourself, coward. i will never take care of myself
<kmath>
<tallinzen> One of the major perks of academia is that you get to travel to exciting locations and spend time in different loca… https://t.co/dcfJH9QowE
<bofh>
hey I worked on my paper & talk slides on a bank of the Seine :p
<kmath>
<bofh453> Sitting under the Pont Charles de Gaulle, overlooking onto the Viaduc d'Austerlitz as metro line 5 cars go over it… https://t.co/WlLG1rvQjF
<bofh>
(also on another occasion I was reading IERS docs linked by egg|zzz|egg at like 2AM across the Seine from Notre Dame when some random offered me, uh, 'la cocaïne' >_> *that* was amusing/awkward (I turned his offer down)).
<UmbralRaptor>
hah
<bofh>
(I mean there is a goddamn mini-rave going on about 5m away, why are you offering the random very intently reading physics papers on their laptop that, of all the people in your vicinity? >_>)
<B787_300>
UmbralRaptor: apparently astronomy includes deck building
<UmbralRaptor>
bofh: assumptions about correlation of interests?
<UmbralRaptor>
B787_300: deck like a wooden structure you can stick a grill or telescope on, or like Magic: the Gathering cards?
<UmbralRaptor>
… or like PowerPoint slides?
<B787_300>
the first
<UmbralRaptor>
ah
<B787_300>
we were having issues with seeting up, leveling , and aligning the scope/mount on the tripod, so we built a temporary deck to put a pier on
<B787_300>
which when written like that seems a bit nonsensical
<B787_300>
UmbralRaptor: i mean arent the latter 2 agivens for astronomers (or at least highly likely)
<UmbralRaptor>
Depending on the location, it's possible that a permanent pier sunk into concrete would be better.
<B787_300>
we cant because of the situation... we would if we could
<UmbralRaptor>
and, er, yes. likely and given, respectively.
<B787_300>
i mean this temporary deck can take the pier and a ~300 lb person on it without flexing that much
<B787_300>
oh and it is level to boot for something that we built in about 3 hrs
<B787_300>
and because we were using a sledgehammer to set the spike plates that the corners of the deck sit on
<kmath>
<stephentyrone> @barrelshifter @tom_forsyth Ok, so on Darwin/PowerPC, long double is this crazy format that represents numbers as t… https://t.co/xzHP02IC0w
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<whitequark>
bofh: i mean you *do* consume a lot of stimulants
<kmath>
<science_dot> @stephentyrone @zneakr We just need to offer everyone who doesn’t like fast FP in HW the option of using SW FP like… https://t.co/MsTlmplPwn
<bofh>
egg|work|egg: eggstremely agreed.
<bofh>
whitequark: hm, possibly.
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* UmbralRaptor
pokes wikipedia in the per capita incarceration rates.
<UmbralRaptor>
(US overlaps with NK estimates, and might exceed CN I'm absolute numbers. =\)
<kmath>
<astrocrash> Today we posted a paper on the ArXiv about a fun discovery (also in @AAS_ResNotes): A 14-year old IIP supernova tha… https://t.co/c8vP5Xx9Ez
<bofh>
sudden drop from ~30 low-energy solar wind particle events/hr (well, ~180, since it's averages over 6hrs) to ~3 (~18 over 6hrs) that's sustained.
<SnoopJeDi>
Right, a 'hard' edge, vs. what comes to mind with the Voyager-2 data is a plasma wave
<SnoopJeDi>
(bear in mind I know *nothing* about these media)
<bofh>
Yep, that's the thing, the heliosheath looks *really* weird in the region of Voyager-2.
<bofh>
And would be in agreement with currently being in a region of plasma bubbles.
<bofh>
(also for some reason the solar wind in that area has the principal component at 90deg to the radial, inexplicably).
<bofh>
so the solar wind is basically sparse ionized charged particles.
<kmath>
<ArgamanB> "Coraline discovered the door a little while after they moved into the house. " ⏎ Coraline (by @neilhimself) is one o… https://t.co/tw8SVbNwY2
<SnoopJeDi>
the two have very different inclinations, yea? is that maybe indicative of angular structure in the heliosheath?
<bofh>
(still waiting for it to get longer tho)
<bofh>
SnoopJeDi: yeah, exactly.
<SnoopJeDi>
fun
<bofh>
one's somewhat weakly above the ecliptic whereas the other is *sharply* below it.
<bofh>
(this is why we can only hit V2 from Australia)
<SnoopJeDi>
yea I can never keep track of which is which, but knew one was pretty low, and one strikes out at a strong angle (god, what an amazing victory for policy)
<SnoopJeDi>
"Why build one when you can have two at twice the price?!"
<bofh>
I mean component redundancy meant it was somewhat lower than that (also it still boggles the mind that on average, *half* of a spacecraft's costs are the launch costs).
<SnoopJeDi>
oh I just can't resist poking fun at Contact
<SnoopJeDi>
that line is something of a joke with one of my labmates
<SnoopJeDi>
inasmuch as it describes accelerator spending pretty well sometimes :)
<bofh>
Ahh. Funnily enough, I haven't seen Contact yet, despite meaning to for awhile.
<bofh>
And yeah, rofl, sounds like it.
<SnoopJeDi>
I'm very due for a rewatch
<SnoopJeDi>
it's...not very good.
<bofh>
On a scale of 1 to The Core, how not very good?
<UmbralRaptor>
I'd go with excellent start, ok middle, awful ending.
<SnoopJeDi>
The Arrival with Charlie Sheen, on the other hand...pretty good radio telescope plot!
<SnoopJeDi>
bofh, I'd put Contact somewhere near Interstellar
<SnoopJeDi>
Albeit substantially more boring
<SnoopJeDi>
But I was a kid when I last saw it, so it's hazy at best
<bofh>
So Interstellar iirc wasn't too bad (it was *amazing* until they actually entered the black hole).
<SnoopJeDi>
It was quite entertaining!
<bofh>
Now, Gravity, I keep meaning to make a Stupid Physics cut that basically just compiles out all the long slow panning shots of w/e and leaves in all the idiocy (orbital inclination change from ISS to Tiangong-2 using a fucking FIRE EXTINGUISHER?!?)
<SnoopJeDi>
And amusingly, they got all the *hard* stuff pretty right, I thought they treated the tesseract pretty fairly
<bofh>
Yeah, it was fair in all honesty.
<SnoopJeDi>
I would have zero complaints about Gravity if it hadn't been hyped (mostly by NDT! >:|) as hypersciencey
<SnoopJeDi>
It had great audio engineering and some really cool shots, but solid "who gives a shit" on the sciencemeter
<bofh>
Actually I'd rate it as worse than "who gives a shit" tbh.
<SnoopJeDi>
favorite part of Interstellar was "oh no, the biosphere has collapsed! we're all starving!" juxtaposed immediately next to "crack open a cold one with the boys"
<SnoopJeDi>
brewing beer seems like maybe a weird thing to do if food shortages are a thing (especially if corn has replaced wheat entirely??) but also humans
<SnoopJeDi>
bofh, IIRC the thing that made me the most nerd-reeeeee about Gravity was the scene involving some kind of tape arresting Sandra Bullock's trajectory or something
<bofh>
SnoopJeDi: I mean it's not the worst thing (it does still have quite a bit of caloric value and you can use the dregs of wheat/corn), but yes, humans. I loved that bit a lot.
<bofh>
SnoopJeDi: OH GODS THAT
<SnoopJeDi>
Interstellar struck a really nice balance imo, and I *adored* the robot
<SnoopJeDi>
naming a character "Dr. Mann" is practically clubbing the audience over the head with the point
<bofh>
SnoopJeDi: that was stupid but I still maintain doing two orbital inclination changes (ISS/Hubble/Tiangong-2) with, like, absolutely negligible Δv was worse.
<SnoopJeDi>
but I can't really fault it for too much, especially given that Kip Thorne was so involved, and the gravitational lensing shaders were *so* accurate
<bofh>
I mean on the one hand, perhaps, on the other hand, I actually had a class taught by a Dr.Mann lmao
<bofh>
(particle physics)
<SnoopJeDi>
oh sure it's a common germanic name I think?
<SnoopJeDi>
IIRC the only thing Kip Thorne considered a hollywoodism was the trip through the wormhole, which was pretty boring when done realistically, so they blended a few realistic models together and added pizazz
<SnoopJeDi>
but also LOL at a planet near a SUPERMASSIVE BLACK HOLE being "too quiescent" to form life or whatever
<SnoopJeDi>
yo dawg I heard you like accretion disks
<bofh>
ROFL
<bofh>
yeah I'd say the issue is more it's the literal polar opposite of quiescent
<SnoopJeDi>
same
<bofh>
also having Kip Thorne as advisor would explain a lot of why Interstellar was on the whole so solid, yep.
<SnoopJeDi>
He's given some really nice lectures on it, most recently at Keck I think
<SnoopJeDi>
I think he actually co-wrote the script
<kmath>
<readingtheend> me: I need to buy new stamps so I'm not sending out condolence cards with Disney villain stamps on them ⏎ ⏎ friend: no… https://t.co/RKF3iBfLBq
<SnoopJeDi>
I've had the rhythm stuck in my head since I saw you boost that
<kmath>
<✔theNASEM> New #ExoplanetScience report says @NSF should invest in two large ground-based #telescopes – Giant Magellan Telesco… https://t.co/r51wKEEOj3
<UmbralRaptor>
Okay, they make the PDF way too hard to get.
<kmath>
<rygorous> At first glance it _looks_ like docs, but if you enter something into the search bar you notice how comically slow… https://t.co/1a1JNEgTMU
<kmath>
<stephentyrone> @barrelshifter @tom_forsyth 1 + DBL_MIN, which has 1074 "effective"[2] significand bits. The fpclassify function re… https://t.co/5TdpJKrx0D
<bofh>
(otherwise, yeah, 107 bits of precision is what I'd expect of double-double)
<egg|zzz|egg>
bofh: well, yeah, you can construct weird double-doubles
<egg|zzz|egg>
bofh: not sure whether you can get them out of operations on of normal doubledoubles? atlas seems to say there's nontrivial normalization to do
<UmbralRaptor>
Proposal: Potemkin docs, but they are actually for how to stage a Communist revolution on a warship.
<bofh>
Yeah, that's the impression I got too from atlas.
<kmath>
<rygorous> Apropos carry-less multiplies: you may know that binary->Gray code encoding is easy ("x ^ (x >> 1)") and decoding s… https://t.co/F4AkqcKSK3
<bofh>
UmbralRaptor: now see, those would be *useful* :p
<bofh>
egg|zzz|egg: looking at PPC long double a bit closer it literally seems to be longlong.h but with doubles but also a bit weird, I wonder why this isn't done on other arches (obv. it's silly on x86, but, say, arm64? makes perfect sense there).
<egg|zzz|egg>
bofh: except that Principia does DoublePrecision at the top level which means that if you do DoublePrecision<Vector<whatever>> you get the SSE2 from the Vector, which is nice
<bofh>
(except I don't think DoublePrecision<double> has supernormals :p)
<bofh>
Yeah, that's really clever.
<egg|zzz|egg>
bofh: it sure, has, just set .value to 1 and .error to smol
<egg|zzz|egg>
s/,//
<Qboid>
egg|zzz|egg meant to say: bofh: it sure has, just set .value to 1 and .error to smol