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>
Other training is an uncomfortable reminder that I don't do enough drugs.
* UmbralRaptor
hopes that there are high resolution scans of that mural.
<SnoopJeDi>
exoplanets definitely count as such imo UmbralRaptor
<FluffyFoxeh>
I didn't know anyone could access exoplanets
* UmbralRaptor
attmpts to hide a petawatt laser array.
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<SnoopJeDi>
how does spot-the-pad work bofh
<bofh>
SnoopJeDi: you get an image of adisk brake and try to find what's left of the brake pad (occasionally it's literally just bare caliper)
<SnoopJeDi>
ahhh
<SnoopJeDi>
yea, that ChrisFix video shows off a pad that's worn enough that you can see the rivets
<SnoopJeDi>
I feel pretty bad about my lack of routine maintenance but at least I know squealing brakes need to be addressed >_>
<bofh>
also now I'm reminded of the genius therethat forgot to secure the calipers at all so they literally stepped on the brakes and out went the calipers...
<bofh>
...and all of the brake fluid
<SnoopJeDi>
lmao
<SnoopJeDi>
they knew enough to take out the knuckle bolts but not to put them back in? what the hell
<SnoopJeDi>
I did feel rather stupid for cleaning my MAF filter and *then* seeing the GIGANTIC gash in my intake boot >_>
<bofh>
Fiora: I'm not sure, tho due to the high electronic similarity of lanthanides I don't think there'd be much variation in *which* is used if there are other uses.
<Fiora>
Cerium has been shown to reduce mortality and morbidity in the treatment of severe burns. This benefit is derived from its action on the burn eschar. It binds and denatures the lipid protein complex liberated from burnt skin that is responsible for the profound immunosuppression associated with major cutaneous burns. It has only limited antimicrobial properties.
<bofh>
heh I like how we both found the same paper independently
<bofh>
also the shit, that's such a strange (& novel) mechanism of action.
<SnoopJeDi>
I'm reasonably sure brain-degrees-of-separation has reached a diffraction (distraction?) limit in #kspacademia
<bofh>
LOL
<Fiora>
so bofh you know one thing that bugs me re pharmacology
<Fiora>
as far as we can tell, nobody has figured out a chemical that kills follicles, stops hair growth, etc
<Fiora>
not counting things that technically have that effect but are scorched earth, like say, sulfuric acid.
<Fiora>
you'd think this would be a significantly easier target than a lot of things they have, in fact, found chemicals for
<bofh>
come to think of it, that is actually an interesting point.
<bofh>
it's even weirder once you realize minoxidil exists, too.
<SnoopJeDi>
it's occurred to me before, usually when driving past electrolysis hair removal places
<Fiora>
and a terribly profitable one, too.
<Fiora>
i say this as i touch the hairs on my face in autistic anger
* SnoopJeDi
sighs and stops hour-long beard touching rampage
<SnoopJeDi>
I've never found a particularly satisfying answer viz. trich and follicle damage
<SnoopJeDi>
but re: chemicals, I guess it could perhaps be because follicles aren't particularly intake-y? I also don't know much about how growth stimulation works, though
<bofh>
I really want to laser off the hairs above my upper lip. Like I'm not sure why those bug me so much (prolly since they're still distinctly visible when completely shaved?)
<SnoopJeDi>
viz? bah.
<UmbralRaptor>
If the solution is immunotherapy, I will need to metaphorically stab someone. >_>
<SnoopJeDi>
I have one particularly noticeable hair *directly* in the center of my eyebrows whose company in life I would not terribly miss
<bofh>
we can slow it down a lot with 5α-reductase type I inhibitors for androgenic hair at least (finasteride etc)
<SnoopJeDi>
bofh, that might be even worse: it's very visible before I can actually pluck the damned thing out (also: any effort at all)
<Fiora>
for me i don't care about visibility, insomuch as most of my remaining hairs are light...
<Fiora>
.... and still coarse.
<Fiora>
i can feel all of them.
<Fiora>
individually
<Fiora>
it's great.
<SnoopJeDi>
yea, that's my hangup with my beard, very coarse/wiry and curly to boot. it's like tactile heroin
<UmbralRaptor>
Weird mix of light and dark. Also, hilariously uneven (and somewhat time variant!)
<Fiora>
(the ones on my face are extremely on my mind atm because i'm growing them out for electrolysis in a few days)
* UmbralRaptor
is particularly annoyed at the possibility of a bad mustache while having no eyebrows or eyelashes.
<Fiora>
again, not many! few enough the entire face can almost be covered in ~45 minutes!
<Fiora>
hey, no eyebrows can be pretty convenient sometimes. i've periodically considered tearing mine off
<SnoopJeDi>
that's something of a ssilver lining at least
<SnoopJeDi>
UmbralRaptor, my ex girlfriend once asked me why I shave my philtrum and the two patches to the sides of my mouth ?
<Fiora>
why WOULDN'T you
<Fiora>
that's weird
<Fiora>
okay correction, for that matter
<Fiora>
WHAT GIRL DOESNT?
<SnoopJeDi>
I mean, she was just not familiar with the concept that some men don't grow hair in those regions
<SnoopJeDi>
which is pretty understandable but was unexpectedly funny for me
<Fiora>
i thought you said she asked why you *do* shave
<SnoopJeDi>
yea, I don't
<Fiora>
oh
<Fiora>
OH
<SnoopJeDi>
this was like
<Fiora>
i get it now
<SnoopJeDi>
2 years into our relationship, too
<SnoopJeDi>
and it recontextualized everything
<Fiora>
lmao
<UmbralRaptor>
Hah
<bofh>
rofl
<SnoopJeDi>
which as I say it might sound weird in other communities where "look I form interpersonal bonds in less than conventional ways okay" is not the standard
<SnoopJeDi>
I definitely had a few moments of gratitude re: #kspacademia on ? day, it's been nice to see this window go white with activity in irssi :)
<SnoopJeDi>
all year long, I mean
<bofh>
look a bonding experience in one of my past relationships involved wandering around a major city at 2AM in a snowstorm and getting hit over the head with a bag of wet socks for complaining too much sbput the fact that I'd miss an assignment deadline (we both knew there was nothing we could do for the next 5hrs other than perambulate slowly to the nearest 24hrs Tim Hortons)
<bofh>
about*
<SnoopJeDi>
tbf, bonding over Timmies seems pretty conventional for canucks
<SnoopJeDi>
but yea, those moments are always nice, I think maybe precisely *because* they stand out from the background signal?
<bofh>
we spent like an hour there, walking in a snowstorm where the ground was barely frozen over puddles is *kinda* hard
<bofh>
it's like windchill -15degC but your socks are soaked clean thru
<bofh>
(ever since I always carry a spare pair of clean dry socks in my backpack or carryon)
<SnoopJeDi>
as I've derailed us away from follices, bofh now is an apropos time to mention that I was doing some brain-stuff reading last night and came across https://en.wikipedia.org/wiki/Derailment_(thought_disorder) which was a "whoa, it me" moment but also look down at "See also"
<UmbralRaptor>
ow
<UmbralRaptor>
One of these things is not like the others.
<SnoopJeDi>
and yet
<bofh>
anyway Fiora, I think the issue is we still haven't found hair-specific signalling pathways to target pharmacologically, and making anything that outright kills a cell class selectively (i.e. hair follicles) is hard. But mostly yeah, it's an odd pharmacological blnd spot.
<Fiora>
yeah
<Fiora>
completely unrelated: i'm realizing i need a tabletop ironing surface. this is harder than it sounds
<SnoopJeDi>
I suspect we're nearing tools like that with e.g. CRISPR
<Fiora>
ironing boards are too small for doing things like "iron down 2 foot wide sheet of freezer paper on fabric" and aren't good painting surfaces
<Fiora>
they're also soft, not hard
<SnoopJeDi>
bio renaissance is best and also possibly scariest renaissance
<Fiora>
i'm currently using a flat fabric cutting board.
<Fiora>
but when heated, it bulges upwards from deformation, likely expansion
<Fiora>
so i gotta wait for it to cool down after a minute or two.
<Fiora>
so it would have to be a) large, wide, rigid b) thick enough to absorb heat and not let too much through c) cleanable d) fairly cheap e) low thermal expansion
<xShadowx>
what is the final number of pi?;3
<bofh>
so my first instinct is "a slab of Yttria", which is a slight pain to get mostly but also way the fuck overkill.
<SnoopJeDi>
mine was aerogel >_>
<UmbralRaptor>
Glass tabletop?
<Fiora>
for that matter. are there plastics that serve the role?
<Fiora>
oh. right. GLASS.
<Fiora>
DUH
<Fiora>
can you iron glass safely?
<SnoopJeDi>
not decorative glass, but borosilicate should be fine?
<Fiora>
related, but only tangentially: Fast Orange and elbow grease combined with a sponge get dried paint off things really well
<bofh>
Yes, depends on the type but there are some that can safely handle that degree of thermal cycling.
<SnoopJeDi>
with an iron I'd guess the big concern would be localized expansion
<SnoopJeDi>
the "I accidentally quenched one spot on my Pyrex by putting it on the stovetop and it exploded" effect
<SnoopJeDi>
which has not happened to me personally but I have head quite a lot about it and apparently there is a fairly vocal group who are Very Mad Online™ that Pyrex switched from borosilicate to soda-lime
<bofh>
xShadowx: 1. hey, you never specified the numbering base!
<UmbralRaptor>
SnoopJeDi: wait, what?
<Fiora>
the freezer paper tends to curl up MASSIVELY (i don't know if it's because of how it's made or because it comes on a roll) but it makes it practically impossible to lay it flat!
<Fiora>
so i use those cnaldes.
<Fiora>
*candles
<UmbralRaptor>
Were there injuries?
<bofh>
SnoopJeDi: yeah that switch is utter garbage.
<Fiora>
those three candles have been more useful to me than entire pieces of expensive equipment.
<SnoopJeDi>
I think it shatters in a fairly harmless way?
<Fiora>
dril's "candles" tweet is almost not a joke
<SnoopJeDi>
isn't that all of dril's tweets?
<Fiora>
tru
<SnoopJeDi>
(or all of weird twitter for that matter heh)
<SnoopJeDi>
millenial absurdism: it's like edging but for humor
<bofh>
<shrug> I've used a dead 3.5" HDD & a Brandon Sanderson hardcover to uncurl paper multiple times (one at each end)
<Fiora>
i use those candles on fabric to stop it from moving and stretching
<Fiora>
i use them on absolutely everything
<Fiora>
related: freezer paper is absolutely fantastic magic
<SnoopJeDi>
Fiora, is that the Pantone HolyGrail color you've been studiously seeking?
<Fiora>
the one on the table? nope! that's a test piece cut from one of the failed attempts
<Fiora>
i'm basically doing a full test run through
<Fiora>
i.e. end to end, make a mostly-finished piece
<Fiora>
then do the real ones
<SnoopJeDi>
ah okay, I thought it didn't look quite right, but I've been following it sporadically as one does with Twitter
<Fiora>
i've learned from past experience that nothing short of a full-scale test will ever validate anything
<Fiora>
lol
<bofh>
And yeah, freezer paper is surprisingly magical honestly
<SnoopJeDi>
as if I didn't already love citric acid
<Fiora>
ammonium sulfate is used with certain acid dye types as well
<Fiora>
vinegar and citric acid work fine for most though
<bofh>
oh, that explains why ammonia is often in the lightener/fixer in hair dyes... I think?
<Fiora>
in this case it's because ammonium sulfate is a salt that acts as a ph balancer
<Fiora>
which slowly releases sulfuric acid
<Fiora>
iirc
<Fiora>
it's not used as a lightener
<Fiora>
"Proper agitation of the dyebath and the addition of Ammonium Sulfate (found in your local garden shop as a fertilizer) instead of vinegar can help. This actually "slows" the reaction process, as it starts at a neutral PH, then becomes acidic as the dye bath heats, allowing the larger molecules time to penetrate the fiber more evenly."
<bofh>
ahhh, so you *want* a slower reaction rate here in certain circumstances.... that makes sense but is horribly unintuitive at first
<Fiora>
yup! you want the reaction rate to be slow as possible, always!
<Fiora>
even with vinegar
<Fiora>
and lighter molecular dyes
<Fiora>
typically you add vinegar *very slowly* to the dyebath
<Fiora>
the problem is if the reaction happens too quickly, some parts of the fabric will grab more dye than others
<Fiora>
both due to temporalspatial variances in dye concentration, and because of fabric sucking in the dye (and stopping other parts of fabric from getting it)
<SnoopJeDi>
diffussion equations strike again
<Fiora>
i.e. if some dye fixes, and then it diffuses into the fabric out of the water, the water concentration is now lower
<Fiora>
and so *other* fabric gets less
<SnoopJeDi>
boy, these esses are showing up in force. I think that means it's time to give my brain some sleep. nn
<Fiora>
diffuBsion
<Fiora>
this is why i ended up resorting to washing machine dyeing
<Fiora>
nothing else guaranteed fairly even distribution.
<Fiora>
also washing machines ??? are actually so cool????? like they seem way better at their job than they need to be
<Fiora>
like holy crap they can basically take an arbitrary mixture and uniform-ize it?
<bofh>
ahh. that explains why I'd always get horribly uneven brightness whenever I tried dyeing fabrics in the past, too.
<Fiora>
yeah, dharma has some guides on What To Do If You're Not Getting Good Results
<bofh>
so washing machines are super-cool; I mean the front-loading design is literally a centrifuge, except in your house.
<Fiora>
top loading is actually better for dyeing though
<Fiora>
main prob is that front loading tends to have places for water to pool, so dye is hard to clean out
<Fiora>
top? just run a rinse
<bofh>
oooh. that is true, yep.
<bofh>
top *would* be much better at mixing to uniformity, come to think of it.
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* Qboid
gives whitequark a Lovecraftian laser-cooled clutter
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<egg>
!seen bofh
<Qboid>
egg: I last saw bofh on [26.11.2017 07:18:07] in #kspacademia saying: "top *would* be much better at mixing to uniformity, come to think of it."
<UmbralRaptor>
Egg: the stack overflow and/or Principia link? Not so much.
<egg>
UmbralRaptor: huh, the stack overflow link should be eggsplanatory
<egg>
(the principia link is probably more abstract)
<UmbralRaptor>
Uh, I'd be hesitant to throw much in the way of € at ANBOscope. It takes 24.5 mm eyepieces, right?
<bofh>
egg: ?
<egg>
UmbralRaptor: yeah, but I can buy a 31,75 eyepiece holder
<egg>
UmbralRaptor: also mounts could be reusable for another tube I guess, if I buy an eggstremely large ANBOscope
<egg>
bofh: I haz a numerical integration question
<egg>
bofh: in Principia we use multistep (conjugate-symplectic) integrators
<egg>
sometimes the annoying player leaves things falling down that go through a singularity
<egg>
that garbles the state of the multistep integrator, and from then on it produces a trajectory that hops with a weird pattern away from the singularity
<egg>
the weird pattern means it can't be downsampled, which is bad, because if the save becomes big the game is unusable
<UmbralRaptor>
egg: delete any objects inside of event horizons?
<egg>
yeah, I'm wondering whether there's a nicer way
<egg>
none of this would be a problem with a single-step method of course (where there can be no corruption of the state)
<egg>
but those are less efficient for the same stepsize
<UmbralRaptor>
Eyepiece-wise, I'd lean towards a 30-32 mm, and son that fill in the range to ~7-9 mm. (the adaptor would make your finderscooe's eyepieces work, right?
<egg>
and in general require much more work at equal errors
<UmbralRaptor>
)
<egg>
UmbralRaptor: well the finderscope is in ZRH, but I guess I could fly/train with my eyepieces
<egg>
bofh: any idea what we could do?
<egg>
UmbralRaptor: so the eyepieces I have here are 13, 5, and 2.5
<bofh>
sec
<egg>
UmbralRaptor: certainly 2.5 is unusable with the ANBOscope, not sure about 5
<UmbralRaptor>
The 5 would probably have weird optical issues, but the 13 would be good.
<egg>
UmbralRaptor: tbh there's a 4 mm ortho at ANBO
<egg>
so the 5 is probably fine
<egg>
2.5 is likely lolnope
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<Ellied>
Licence plate ahead: GGROX
<Ellied>
possible GregroxMun sighting?
* UmbralRaptor
is somewhat surprised that a 4 mm gives decent images with that scope.
<kmath>
<astronomolly> (Yes, this is indicative of a pre-coffee, pre-Ritalin conversation when my family is together.)
<Ellied>
coffee doesn't generally end well for me
<UmbralRaptor>
=(
<Ellied>
I associated it with spending about 2 hours panicking and then the rest of the day lethargic
<Ellied>
I occasionally have a carefully planned dose of caffeine through one of those dissolving drink tablets if I need to be awake later in the day but I'm trying very hard not to make it into a habit at any point these days
<icefire>
im very thankful coffee doesnt drive me nuts
<icefire>
it helps stop heads from rolling in the morning and then a normal day after that
<Ellied>
I occasionally have a carefully planned dose of caffeine through one of those dissolving drink tablets if I need to be awake later in the day but I'm trying very hard not to make it into a habit at any point these d
<Ellied>
oops
<Ellied>
silly connection
<Ellied>
I need to stop hitting up-arrow to see if it's still alive and go back to sefsefsef or something
<egg>
!wpn Ellied
* Qboid
gives Ellied a Paschen equivalence
<egg>
!wpn UmbralRaptor
* Qboid
gives UmbralRaptor a Soviet jiangshi
<egg>
UmbralRaptor: well it's probably too much magnification for the aperture, but nothing horrible
<UmbralRaptor>
The terror of Krasnoyarsk!
<Ellied>
!wpn egg
* Qboid
gives egg a ytterbium helicoid
* egg
puts it next to the yttrium, erbium, and terbium helicoids
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<egg>
UmbralRaptor: the current ANBOculars are H 20, HM 12.5, HM 9, HM 6 (the 4 that came with the scope), and or 4 (phl bought that one separately)
<egg>
all in 24.5 mm
<UmbralRaptor>
That pretty much covers the useful range?
<egg>
yeah
<egg>
UmbralRaptor: the ANBOscope is much better-behaved than my finder as far as chromatic aberration is concerned (long focal be of great length)
<egg>
UmbralRaptor: would be fun to use it with Naglers rather than the pinpoint of the ortho though :-p
<UmbralRaptor>
heh
<egg>
UmbralRaptor: the ANBOscope's finder is shit though
<UmbralRaptor>
well, yes.
<icefire>
I wonder if I could get kmath running on my Wii
<Iskierka>
Ffs octave, "variable undefined" error in the FUNCTION WHERE I'M ASKING IF IT'S DEFINED
<egg>
!seen bofh
<Qboid>
egg: I last saw bofh on [26.11.2017 15:07:20] in #kspacademia saying: "sec"
<Ellied>
lol octave
<Ellied>
useful for: 1. Doing MATLAB homework away from the computer lab without buying MATLAB. 2. Nothing else.
<Ellied>
AIUI the whole reason anyone uses MATLAB when other options are available is that it makes parallelization of big data-crunching operations easy, and octave doesn't appear to support *any* parallelization
<Ellied>
my prof was telling me the other day that the parallelization library it has is just a dummy for compatibility with MATLAB code
<UmbralRaptor>
Stabbity
<BPlayer>
Hi there!
<UmbralRaptor>
Unrelated: that horrible data table apparently crashes Excel, but not LibreOffice Calc.
<UmbralRaptor>
!wpn BPlayer
* Qboid
gives BPlayer a graviton iodine bolo
<UmbralRaptor>
!wpn -add:adj weak
<Qboid>
UmbralRaptor: Adjective added!
<UmbralRaptor>
!wpn -add:adj strong
<Qboid>
UmbralRaptor: Adjective added!
<UmbralRaptor>
!wpn -add:adj electrical
<Qboid>
UmbralRaptor: Adjective added!
<BPlayer>
!wpn UmbralRaptor
* Qboid
gives UmbralRaptor an argon mutually intelligible tadpole
<UmbralRaptor>
!wpn -add:adj magnetic
<Qboid>
UmbralRaptor: Adjective added!
* UmbralRaptor
says hi to the tadpole.
<BPlayer>
Is "gravitational" a thing, if you're adding all those field stuffs?
<UmbralRaptor>
already, yeah.
<egg>
!wpn bofh
* Qboid
gives bofh a nominal pommel
<egg>
bofh: any idea on detecting bad fixed-stepsize linear multistep integrator behaviour?
<bofh>
yes, I'm trying to find a paper on exactly this.
<bofh>
in the process discovering I was visited by the HDD failure fairy on some time in the recent past, grumble.
<egg>
ow
<egg>
bofh: we need to get more numericists in here
<egg>
bofh: also cats
<Ellied>
I want to say that libreoffice is slightly more resistant to content-related crashes than MS office, but I'm not sure how true that is
<Ellied>
IIRC it's fine with spreadsheets that have silly numbers of rows/columns and documents with silly numbers of pages, compared to older versions of MS Office which had either hard limits or some weird crash threshold
<Ellied>
I recall being told in 3rd grade computers class that excel spreadsheets were infinitely long, but that was on MSO 2003, where they actually just stopped at 65535 rows
<bofh>
"2^16 - 1 rows ought to be enough for anyone" ~ Bill Gates, paraphrased.
<Ellied>
I don't remember how many columns were allowed. On Palm OS Documents to Go, it was up to IV, and it *might* have been the same in excel? I recall being surprised by how few it was on the desktop version.
<Ellied>
I can easily imagine an IRC channel of developers deliberating over whether 32-bit table sizes were enough for libreoffice, and ultimately deciding that no, since Microsoft had made that mistake already, they'd definitely need to be 64-bit at *least*
<Ellied>
but I don't know, I haven't stress-tested libreoffice recently and I'm not on a good machine to do that now (slow, not much RAM)
<BPlayer>
Heh. As a person who frequents programmer channels, I can confirm. I first hand witnessed a discussion about how much pen ink could be saved in the US per year if people favoured using Tau over Pi.
<UmbralRaptor>
Hah!
<egg>
bofh: I mean detecting intersections with a planet seems doable (we compute the distances because of the forces, at reasonable speeds you'll have one point in the planet if you go close to the singularity), but ideally detecting that corruption of the state would be better
<bofh>
Problem is detecting general state corruptions is tricky.
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<egg>
yeah
<egg>
!wpn Fiora
* Qboid
gives Fiora a Brand New Photoneutronic Engine
<egg>
!wpn whitequark
* Qboid
gives whitequark a Bloch osculating bell which vaguely resembles a diapsid
<SnoopJeDi>
BPlayer, most of the ink savings would be shutting up the fools trying to push τ :P
<BPlayer>
I shall contact you with the person arguing pro-tau, and see what come out of it :D
<SnoopJeDi>
let me know when they can measure a radius :P
<whitequark>
!wpn egg
* Qboid
gives egg a sectoral goto
<egg>
whitequark: how are you? also any news from the cats?
<whitequark>
am in the bay area, am fine
<egg>
whitequark: btw in case you want catpics I went to ANBO a week ago so I have some new pics (also new neighbourhood cats apparently) https://goo.gl/photos/8DdiuNBNSGvH7s8J9
<SnoopJeDi>
...do you observe terrestrially without a set of righting optics? o.O
<SnoopJeDi>
terrestrial subjects, that is. I assume you primarily observe terrestrially :P
egg is now known as egg|nomz|egg
<whitequark>
cat.
<SnoopJeDi>
ooh, the NUKEMAP author was on omega tau, UmbralRaptor
<SnoopJeDi>
UmbralRaptor, as frustrating of a read as "15 Minutes" has been, it's been pretty neat to learn about all the miscellany of SAC operations that very quickly fell out of national memory
<SnoopJeDi>
I'd never even *heard* of the Texas Towers, let alone the collapse of Tower Four
<SnoopJeDi>
Oh cool, I didn't realize he'd written MISSILEMAP, too
egg|nomz|egg is now known as egg
<egg>
SnoopJeDi: uh, this scope is there mostly to stare at the sky
<egg>
it's just that by day it's easier to stare at cows :-p
<SnoopJeDi>
sʍoɔ
<egg>
I do have a righting prism, but I never use it :-p
<egg>
BPlayer: because there is not to watch in the sky by day
<soundnfury>
egg: I hope not
<egg>
SnoopJeDi: does that work in english?
<egg>
I thought moo was [mu] and μ was [mju]
<SnoopJeDi>
yea that's the typical pronunciation, it's kind of a slant pun I guess?
<UmbralRaptor>
Cowefficient of friction?
<SnoopJeDi>
I like to think of it as a three-tiered joke because of "mew"
<egg>
in french it would entirely fail because meuh is [mø] ws μ [my], so that's still better
<SnoopJeDi>
ws, hehe
<egg>
s/w/v/
<Qboid>
egg meant to say: in french it vould entirely fail because meuh is [mø] ws μ [my], so that's still better
<egg>
um
<soundnfury>
xD
<SnoopJeDi>
had a discussion with a Sri Lankan colleagues yesterday about how w is a bad letter
<soundnfury>
egg: s/ ws/, cf.
<Qboid>
soundnfury thinks egg meant to say: in french it would entirely fail because meuh is [mø], cf. μ [my], so that's still better
<SnoopJeDi>
(after a somewhat humorous mishearing on her part)
<egg>
arguably
<egg>
SnoopJeDi: ah right, but mew and μ are both [mju] right? so the shirt would be improved by a picture of a cat :-p
<egg>
s/the shirt/anything/
<Qboid>
egg meant to say: SnoopJeDi: ah right, but mew and μ are both [mju] right? so anything would be improved by a picture of a cat :-p
<SnoopJeDi>
yea we say them both the same in English
<egg>
sadly cat isn't pronounced like a meow
<egg>
(nor is chat)
<egg>
(nor is кот)
<egg>
clearly we should speak egyptian or chinese or vietnamese or one of those languages where the name of the cat is some sort of meowing
<soundnfury>
egg: otoh, собака: it's a barker
<BPlayer>
egg: Ah, lucky you. The weather was not appropriate for stargazing here for like a month now
<egg>
BPlayer: so those cow pictures are 2.5 years old
<egg>
(but they're how ANBO got its name, that and Iskierka doing the same with a reflector)
<Iskierka>
I never actually found cows for certain
<Iskierka>
just sheep
<BPlayer>
SETC? Search for extra-terrestrial cows?
<soundnfury>
MaDCoWS?
<Qboid>
soundnfury: [MaDCoWS] => Massive and Distant Clusters of WISE Survey
<BPlayer>
Goddammit, whenever you think you came up with a silly acronym, some NASA phyicists came up with a sillier one and actually named something that way
<SnoopJeDi>
SWAG?
<Qboid>
SnoopJeDi: [SWAG] => Survey of Water and Ammonia in the Galactic Center
* BPlayer
frowns
<BPlayer>
I thought PEPSSI was silly
<SnoopJeDi>
it is
<SnoopJeDi>
it should be BEPIS
<BPlayer>
It should?
<SnoopJeDi>
egg, so our accelerator conference superset is named JACoW http://www.jacow.org/
<soundnfury>
BPlayer: no, ignore SnoopJeDi, he's being silly
<SnoopJeDi>
BPlayer, no, memes.
<SnoopJeDi>
my field is usually rather uncreative about naming though.
<BPlayer>
Okay then
<SnoopJeDi>
LHC, ISR, SPS are all named mostly for what they are
<SnoopJeDi>
...and non-CERN machines, too.
<BPlayer>
Well, even more serious names like VLT can be silly
<egg>
OWL?
<Qboid>
egg: [OWL] => Overwhelmingly Large Telescope
<BPlayer>
LOL
<BPlayer>
Is that a thing?
<soundnfury>
gah that is not in proper !acr format!
<SnoopJeDi>
for reference I guess, the Tevatron is probably the most creatively named machine ever
<egg>
ELT?
<egg>
wait what
<UmbralRaptor>
SnoopJeDi: RHIC and SLAC are easy to say.
<SnoopJeDi>
egg, shouldn't that be OWLeT?
<UmbralRaptor>
EELT?
<egg>
E-ELT?
<Qboid>
egg: [E-ELT] => European Extremely Large Telescope
<BPlayer>
Is that a thing too?
<SnoopJeDi>
Pronouncing RHIC as anything but "rick" is a fast way to get identified as a non-expert IME
<SnoopJeDi>
like that one guy on nutter radio who said RHIC caused 9/11
<BPlayer>
IME?
<SnoopJeDi>
in my experience
<BPlayer>
Ah
<Iskierka>
RHIC?
<Qboid>
Iskierka: [RHIC] => Relativistic Heavy Ion Collider
<egg>
UmbralRaptor: E-ELT might be an old designation, I can't find much of it
<egg>
!acr -add:ELT Extremely Large Telescope
<Qboid>
egg: I added the explanation for this acronym.
<egg>
MOSFIRE?
<soundnfury>
JuICE?
<egg>
JUICE?
<Qboid>
egg: [JUICE] => Jupiter ICy moons Explorer
<BPlayer>
I think I remember JuICE
<BPlayer>
Ah, yes, that settles it
<egg>
(u should probably be capitalized)
<SnoopJeDi>
hehe
<UmbralRaptor>
JIMO?
<egg>
!acr -add:MOSFIRE Multi-Object Spectrometer for Infra-Red Exploration
<Qboid>
egg: I added the explanation for this acronym.
<SnoopJeDi>
close to JIMBO
<egg>
DEIMOS?
<soundnfury>
egg: For, not for
<egg>
!acr -add:DEIMOS Deep Extragalactic Imaging Multi-Object Spectrograph
<Qboid>
egg: I added the explanation for this acronym.
<kmath>
<whitequark> I have just discovered that *nix systems have two completely unrelated APIs called "flock" and "lockf" and words ca… https://t.co/MaymCcxQFg
<kmath>
<erincandescent> @tiffany_public @whitequark flock sometimes does and sometimes doesn't work over nfs when it does, it interoperates… https://t.co/RUBjJT1St5
<SnoopJeDi>
"fcntl locks all unlock themself if you close *any* fd pointing to a given file"
<kmath>
YouTube - MGSV: The awesomeness of a puppy's paw pads - Mother Base Quote
<FluffyFoxeh>
lol
awang has joined #kspacademia
<egg>
<egg> bofh: question: how would you compute x'(0) from x(0), x(-Δt), x''(-Δt), x''(-2Δt), x''(-3Δt), ..., x''(-kΔt)
<bofh>
okay so basically you have the function and its Hessian and want to compute its Jacobian.
<bofh>
yuck, but there *are* ways to do this.
<egg|phone|egg>
There's something like that in that book that I icanhazpdfed yesterday but I don't know where the coefficients Come from and how to generalise to other orders
<bofh>
As in, you have a bunch of higher-order derivatives and want to compute the first?
<egg>
bofh: I have an integrator for a 2nd order ODE, multistep, gives me positions and computes accelerations at every points, does not give me velocities
<egg>
(it's not the Cowell-Нумеров one, it's stuff by Quinlan, but Quinlan references this Cohen almanac thing and uses the same)
<bofh>
naive question, but why not just do finite difference on the positions? or is that not good enough numerically?
<egg>
it works (slightly tricky to not cancel badly), but oder seems ill-behaved
<egg>
so looking around for better alternatives
<egg>
bofh: also icymi there's a numerical method called Нумеров's method which amuses me greatly
<bofh>
LOL
<egg>
cc whitequark (is it equally amusing in russian? I don't know what numerical methods are called in russian)
<egg>
bofh: btw, naive one-sided differences are really badly conditioned in this case (astronomical positions), so instead of using a linear combination of x1, x2, x3, ..., you have to use a combination of x1-x2, x2-x3, etc.