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>
bofh: Also a mechanism used to predict planet 9 and model how hot jupiters got there!
egg|zzz|egg has quit [Quit: moo.]
egg has joined #kspacademia
<bofh>
UmbralRaptor: hot jupiters?
<UmbralRaptor>
bofh: gas giants in sub-mercury (sometimes <1 day) orbits
<UmbralRaptor>
eg: 51 Peg b, 78 Vir b
<bofh>
holy shit those are a thing?
* egg
gives bofh an eggsoplanet
<bofh>
why wouldn't they just fall into the compon--fuck, how would they get there in the first place? wouldn't a gas giant that close to the cloud forming a star just... contribute to forming the star?
<UmbralRaptor>
Exoplanets are weird.
<UmbralRaptor>
Hence the expectation that they formed farther out and migrated inwards.
<bofh>
why would migrating *inwards* be stable and energetically favourable?
<UmbralRaptor>
While there's still a disk around the star, weirdness with tidal torques. (Gas giant induces overdensities in some parts of the disk which pull on the planet)
<UmbralRaptor>
Getting the planet to not just fall into the star is apparently hard.
<bofh>
you don't say
SilverFox has quit [Ping timeout: 204 seconds]
<Iskierka>
*scienceilliteratevoice* "what if it's just floating like a big balloon"
<UmbralRaptor>
Iskierka: well, they do sometimes inflate!
<Iskierka>
I feel that should be always, given temperature increases
<bofh>
"Consider a spherical planet, moving in simple harmonic motion..."
<UmbralRaptor>
Annoyingly, these sometimes need nonspherical planets/stars (tides!) >_>
<Iskierka>
and being fair on how they might seem weirdly common, they *are* probably one of the most obvious types of exoplanet and thus we may have found way more of them as a % than any other
<Iskierka>
it might be that this is like the full list of hot jupiters so "random chance" is good enough for how they didn't fall in
<UmbralRaptor>
Pretty much. Modern estimates are that they're pretty rare (I want to say 1-10% of sunlike stars). Meanwhile subneptunes/super earths… o_O
<bofh>
yeah apparently neptune-like eggsoplanets are supposed to be popular
<Iskierka>
also given blockage not sure if this would still require the bigger-than-star rings
<bofh>
6/win 20
<bofh>
good god trying to figure out and model the 6BN6 tube is giving me a headache
<bofh>
on the plus side I managed to get some hilarious and interesting audio effects out of it already
<bofh>
should record them
<Iskierka>
If you record someone's molecular structure, throw them through a wormhole that atomises them, transmit their structure after them, and rebuild them on the other side with the same material, are they the same person?
<SnoopJeDi>
personality is an illusion
* SnoopJeDi
cackles
<bofh>
^
<SnoopJeDi>
HEY MA LOOK THE SENTIENT MEAT IS PONDERING ITS OWN EXISTENCE
<SnoopJeDi>
Sorry I just ran for an hour and I guess it's primed my existentialism circuit
<bofh>
"Hydrogen is a colourless, odorless gas, which if left alone in large enough quantities, for long enough, will begin to think about itself." ~ Adams
<Qboid>
1d 12h 0m 0s left to event #7: IRNSS 1H/PSLV-XL [at 2017-08-31 13:29:00]. Say '!kountdown 7' for details
<UmbralRaptor>
So I had to sign an agreement that I wouldn't use school resources for nefarious porpoises (eg: violating IP law).
* UmbralRaptor
stares at textbook PDFs.
<SnoopJeDi>
As long as you don't step on anyone's toes, unlikely anyone would care.
<SnoopJeDi>
Had to actually explain to a colleague why running a personal site on university servers with AdSense was a conflict of interest...
<UmbralRaptor>
Well, most-all of the authors are dead…
<G-Mobile>
Do isotopes of an element typically vary visibly, like in color or other visible attributes like color?
<SnoopJeDi>
Not sure about pure elements, but in compounds absolutely (I've been told heavy water is crystal clear compared to regular ol' water)
<Fiora>
some of them do, yeah
<Fiora>
deuterium has the biggest range of differences because its mass ratio vs hydrogen is so large
<Fiora>
enough that it changes the shape of the molecule
<SnoopJeDi>
I really hope nuke can find a violation of periodicity in an accelerator because of relativistic effects, that'd be heckin neat
<Iskierka>
even in water a single extra nucleon anywhere in every molecule is a significant % change in mass, so notes should change very perceptibly
<SnoopJeDi>
whaaat. so. local govt let people buy space in the expo center to house horses. a stall + some hay for one-time $20. pretty generous. They had an emergency meeting today and changed it, BECAUSE PEOPLE COMPLAINED
<SnoopJeDi>
I'm all for coming together but jesus, $20 for your MONEY-DESTROYING BEAST is too much?!
<SnoopJeDi>
err shavings, not hay
<G-Mobile>
Can color be predicted on paper?
<SnoopJeDi>
Kiiiinda? I think. E.g. we had some expectations for antihydrogen's spectrum that ALPHA confirmed.
<SnoopJeDi>
Reasonably sure the work that won Dudley Herschbach his Nobel touches the subject obliquely
<SnoopJeDi>
I remember him lecturing us on the application of group theory to methylation: formation of what he called "methyl-brick-ate" where the "brick" is some compound whose properties are already known from e.g. FTIR
<SnoopJeDi>
Although that's more to do with shifts in properties than deriving them from first principles. But I think the realm of QED can handle the problem (at least in principle)
<G-Mobile>
this sounds well above my pay grade
<egg>
!wpn Fiora, UmbralRaptor, et al.
* Qboid
gives Fiora, UmbralRaptor, et al. a restricted hydrofluoroolefin
<Fiora>
meow
<whitequark>
meow
<egg>
!wpn whitequark
* Qboid
gives whitequark a Bravais summation
* egg
pets Fiora and whitequark
egg|phone|egg has joined #kspacademia
<egg|phone|egg>
!tell bofh I found trubowitz's БКЛ notes
<Qboid>
egg|phone|egg: I'll redirect this as soon as they are around.
<egg|phone|egg>
I should probably scan that stuff, as well as my handwritten notes from Sudakov's algebraic method in combinatorics
<G-Mobile>
sometimes I wonder if yalls are acting out a mathstery based AR game
egg|cell|egg has joined #kspacademia
egg|phone|egg has quit [Read error: Connection reset by peer]
egg|phone|egg has joined #kspacademia
egg|mobile|egg has joined #kspacademia
egg|phone|egg has quit [Read error: Connection reset by peer]
egg|cell|egg has quit [Ping timeout: 183 seconds]
egg|mobile|egg has quit [Quit: Bye]
<G-Mobile>
all the cubes within a hypercube are proper right angle cubes in their own 3 dimensions maybe?
<G-Mobile>
the question kind of got lost in there
<G-Mobile>
every side of each cube shares two dimensions with that face's adjacent cube?
SilverFox has joined #kspacademia
<Qboid>
1d 0h 0m 0s left to event #7: IRNSS 1H/PSLV-XL [at 2017-08-31 13:29:00]. Say '!kountdown 7' for details
<Ellied>
we have clocks controlled by wireless of some sort here. I can't tell if it's a proper network or what, but they're designed to also function as an audio-visual emergency PA system.
<Ellied>
naturally they're overcomplicated and tend to break weirdly.
<Ellied>
They used to show the time in yellow, back when I started here, but one day they all turned red. No one appears to know why. They're still like that.
<bofh>
Ellied: that's amazing. and stupid.
<Qboid>
bofh: egg|phone|egg left a message for you in #kspacademia [30.08.2017 08:36:58]: "I found trubowitz's БКЛ notes"
<bofh>
egg: !!!!!!!!!!!!!
<Ellied>
sometimes they stop working completely and just sit there blinking a few pixels on the top row. It's hard to tell if there's a pattern to the pixels that blink, but the annoying thing is that it's not the time.
<Ellied>
cycling power to them or disconnecting and reconnecting the receiver(/transmitter??) box doesn't fix that state.
<Ellied>
I think I need to just build a regular normal non-stupid quartz clock for the wall of my lab
<Ellied>
(rooms that are not set up as classrooms don't have the borked clocks, so luckily I do not have one)
* UmbralRaptor
is going to assume that the clocks are a really boring SCP.
<Ellied>
Iskierka: I'm sure someone knows how, they're just so far removed through the echelons of university administration that no one who actually uses the clocks would possibly know where to find them.
<Ellied>
the clocks appear to use bi-color red-green LEDs, so they can display red, yellow, and green. I guess someone just decided that red... saved power or something?
<Ellied>
I mean they're the old type of green LED so it probably does
<Ellied>
it would not surprise me one bit if it was about conserving power. that's one of those "we can say we did good without having to do anything hard" things this uni loves
<bofh>
Ellied: "old type"? I wasn't aware there was a new type of green LED, thought everyone still used the GaAsP ones
<Ellied>
I don't know what materials they are, but there's an older type that looks yellowish and has piss-poor efficiency, and a newer kind that looks slightly blue at high current and has great efficiency.
<Ellied>
the ones I posted about testing on twitter are the newer kind
<Ellied>
side-by-side, I think I found that an older one with 20 mA through it looks the same brightness as a newer one with 0.5 mA.
<Technicalfool>
KSP forum software update happening soon. Forums will be down for the duration.
<bofh>
Ellied: AlGaP or GaP, both seem to be used. Commonly the GaP is N-doped, giving 565nm light instead of 555nm light, which seems correct for what I remember of the colour.
<bofh>
wait you can get InGaN to emit green light via modifying the doping? TIL
TonyC has joined #kspacademia
<Ellied>
oh, that sounds right, given that it has extremely similar electrical characteristics to blue LEDs from the same manufacturer (similar efficiency, only very slightly lower forward barrier voltage)
<bofh>
yeah, it also explains the secondary bluish emission when overdriving it
<bofh>
apparently basically you vary x for In_xGa_{1-x}N, blue is ~0.31, green is higher.
<Ellied>
makes sense
<bofh>
apparently pure GaN's bandgap is ~365nm, whoops. always assumed it was around 405.
<bofh>
also wow apparently typing h*c/3.4eV gives what you want from google.
egg|phone|egg has joined #kspacademia
<Ellied>
incredible, the guy in charge of getting a laser cutter for the new makerspace at my uni actually got a good exhaust scrubber for it
<Ellied>
last time I talked to him he didn't seem to quite recognize how important that was
egg|cell|egg has joined #kspacademia
egg|phone|egg has quit [Read error: Connection reset by peer]
<UmbralRaptor>
First Physics seminar: Sept 8 at 1500. Gradstravaganza: Sept 8 at 1530.
<UmbralRaptor>
o_O
<egg>
UmbralRaptor: a section title in those БКЛ notes: "How Any Really Determined Person Can Discover The Ricci Tensor All By Him Or Herself"
<UmbralRaptor>
O_o
<egg>
bofh: also this sentence "You may be discouraged, even annoyed, by enigmatic sets and maps falling from the sky on the vague authority of a paper written fourty-five years ago by three Muscovites you've probably never heard of and Hollywood will never make a movie about*. Bear with us."
<egg>
bofh: with this footnote: "* Although Khalatnikov, Stalin Prize 1953, appears (played by Georg Nikoloff) in the film, The Theory of Everything."
<kmath>
<chaosprime> @FioraAeterna ain't no party like a wittgenstein party because a wittgenstein party is meticulously decomposed into… https://t.co/Of04iK3FEo