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>
<johncarlosbaez> The exceptional Jordan algebra, built from octonions, was discovered in research on foundations of quantum mechanic… https://t.co/tm5xZQPPcd
<kmath>
<jhtripleu> my name is catte, ⏎ the prynters pet. ⏎ i give my aid ⏎ when type is sette. ⏎ i ynk my paw ⏎ and wyth a look ⏎ at prynter man,… https://t.co/K7rJKJYwgO
<kmath>
<jgerity> @scanlime Friend of mine once pitched a geek-chic bar named ħ and I'm still unsettled about it
<SnoopJeDi>
ooh is it?
<SnoopJeDi>
I've only been to the museum portion of the campus because the website liiiieeed about tour hours
<SnoopJeDi>
No big loss though, traveling across Switzerland was fun, and the exhibits are neat. The hands-on Rutherford experiment is the one I remember best
<UmbralRaptor>
As in a Geiger counter and a source of alphas?
<SnoopJeDi>
I think they had a digital readout but yea basically
<SnoopJeDi>
It was very sandboxed, the patron could only manipulate the axle to rotate the foil
<kmath>
<diodelass> ME [at a party, slightly drunk]: okay. get up youtube, I got a drinking game we gotta play ⏎ FRIENDS: oh no, your gam… https://t.co/DqU9tRjmSy
<kmath>
<johncarlosbaez> The exceptional Jordan algebra, built from octonions, was discovered in research on foundations of quantum mechanic… https://t.co/tm5xZQPPcd
<kmath>
<dtsbourg> Re-discovering buildings that aren't around anymore, like the Palais du Trocadéro in Paris which became the Palais… https://t.co/oYTPkAzV42
<kmath>
<whitequark> at this point im kind of curious just how far can i cool this apartment in the summer ⏎ can i do 10°C? 4°C? going low… https://t.co/wyFGm7gdY9
<egg|zzz|egg>
whitequark: wouldn't the cats complain?
<bofh>
RIP my notifications
<bofh>
OTOH I had a thread go viral that's like, interesting stuff I like and not a stupid joke, so I'm still happy.
<kmath>
<profanegeometry> consistent measurement systems are for aerospace engineers and people who don't need to fuck up literally everythin… https://t.co/h851VNOsst
<UmbralRaptor>
Note to self: June 30 is a Saturday, not a Friday.
<bofh>
UmbralRaptor: I mean "a galaxy lacking dark matter" seemed like a very weird claim to make in the first place, so I'm not surprised it could be resolved this way.
<APlayer>
Shouldn't it have peaks where the excitation frequency is a whole number multiple of the natural frequency?
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<SnoopJeDi>
13:31 < terribot> Anyone play tennis and have a toaster and an oscope?
<SnoopJeDi>
bless Markov chains for giving me that sentence
<SnoopJeDi>
APlayer, nope. Did you look at the equation attached to that image? It explains arithmetically the origin of a single peak: (1-η) has only one zero
<SnoopJeDi>
Thinking about pushing a person on a swing always helps me when I'm trying to reason about driven oscillators. ω/ω0=1 means I push (AND pull, since it's *sinusoidal*) at the 'right' times, but ω/ω0=2 is loosely two pushes and pulls per swing cycle, and that 'muddies' the system and limits the response (energy or swing height, if you like) I can achieve
<APlayer>
Uh, I mean it the other way. Push once every second swing cylce
<APlayer>
cycle*
<SnoopJeDi>
well it's a *continuous* force, so the analogy is a bit broken
<SnoopJeDi>
You have to imagine you're always pushing or pulling which is very unlike an actual swing >_>
<APlayer>
Ah, it assumes a sinusoidal excitation signal
<APlayer>
Got it
<SnoopJeDi>
Right, that plot is showing a very specific excitation, but one that is very useful in general
<SnoopJeDi>
Plots of RF cavity Q look a lot like that, for example
<SnoopJeDi>
because we treat that as a *bunch* of driven oscillators at a whole spectrum of frequencies (hooray superposition!)
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<egg>
!wpn whitequark
* Qboid
gives whitequark a mad meganeuropsis
* egg
wonders whether котя will eat it
<UmbralRaptor>
Careful, it might eat one of the kittens.
<APlayer>
SnoopJeDi: Okay, thank you very much, that settles things a bit
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<SnoopJeDi>
APlayer, laser mode-locking is a *little* bit related to this but probably outside the realm of your presentation. Your intuition is right enough for the general problem, you can construct systems with multiple response peaks (see also optical combs)
<egg>
!seen whitequark's cats
<Qboid>
egg: Value cannot be null.
<APlayer>
Hehehe
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<egg|phone|egg>
!wpn
* Qboid
gives egg|phone|egg a TeX LED
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<egg|phone|egg>
Meow
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<kmath>
<CatnGeek> @AndrewJacksonZA @bofh453 @phrawzty And my parents in law are living in the first window on the left. Twitter at it… https://t.co/3PevhFN7vU
<bofh>
sometimes, rarely, twitter is actually awesome.
<iximeow>
!! that is very cool
<SnoopJeDi>
d-did that person just dox their parents
<bofh>
I... guess? I doubt it'll cause anything to happen.
<SnoopJeDi>
Oh yea almost certainly not
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<bofh>
also parents in law, which is a bit different :P
<SnoopJeDi>
I primed myself for concern, I'm reading eevee's patreon post atm, I hadn't realized she curtailed her net habits because of stalking :(
<bofh>
Ahh. OH that explains a lot, depressingly :/
<SnoopJeDi>
yea, I had wondered, but didn't poke her feed
<SnoopJeDi>
Mentioned her in another channel (Löve came up) and someone pointed it out
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<bofh>
I'm just kind of staring at that thread btw. "Here's a 1914 colour photo of a street in Paris." "Here's a photo of that *exact* spot in Paris from 30 minutes ago today, and it's honestly barely changed." "Oh hi I have relatives that live on that street."
<bofh>
Like that's amazing.
<APlayer>
I've just had to type "maximal amplitude" and it feels like this redundant term is redundant. But in fact, I think I have to word it this way
<SnoopJeDi>
"But mark well, when thou receivest good, so equally art bound to return good threefold."
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<UmbralRaptop>
*boing*
* APlayer
gives UmbralRaptop internet
<SnoopJeDi>
!wpn -add:wpn internet
<Qboid>
SnoopJeDi: Weapon added!
* APlayer
gives SnoopJeDi intranet
<SnoopJeDi>
!wpn -add:wpn intranet
<Qboid>
SnoopJeDi: Weapon added!
<SnoopJeDi>
!wpn -add:wpn Metal Gear
<Qboid>
SnoopJeDi: Weapon added!
<SnoopJeDi>
(I considered "weapon to surpass Metal Gear" but that's a bit much)
<APlayer>
What is "Metal Gear" in this context?
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* APlayer
gives UmbralRaptor more internet
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<APlayer>
That backfired
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<SnoopJeDi>
APlayer, Metal Gear is a game series loosely about a walking nuclear railgun tank thingy that is something like 30 years old now, and known for being a bit ridiculous.
<APlayer>
Oh
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<SnoopJeDi>
But also with Very Strong Opinions™ about nuclear weapons and war/global politics in general.
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<SnoopJeDi>
It's probably a dead series now, though. The creative mind behind it (Hideo Kojima) left Konami.
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<bofh>
how bad of an idea would it be to put a small amount of radium paint in a ring you wear?
<APlayer>
I guess it would generally be a worse idea than not applying radium paint
<bofh>
well, yes, but is its specific activity high enough to measurably affect, say, osteosarcoma risk?
<bofh>
"In the early history of the study of radioactivity, the different natural isotopes of radium were given different names. In this scheme, 223Ra was named actinium X (AcX), 224Ra thorium X (ThX), 226Ra radium (Ra), and 228Ra mesothorium 1 (MsTh1)." tag yourself I'm Mesothorium 1.
<APlayer>
Not sure, and as much as I'd like to find out, it's really late. I'm afraid I need to leave :-(
<APlayer>
Bye, and I'd appreciate a ping in the future if you find out!
<bofh>
Will do!
<SnoopJeDi>
bofh, have you considered tritium btw?
<UmbralRaptor>
^
<SnoopJeDi>
not tenable for completely arbitrary geometry, but pretty good at light!
<SnoopJeDi>
and mayyyybe you can find small discs or something suitable?
<bofh>
SnoopJeDi: problem is it's liquid and so containing it is a lot harder in a small space
<SnoopJeDi>
yea :/
<bofh>
also christ, 5.85ct is a larger gemstone than I was expecting.
<bofh>
(since, like, otherwise it'd be perfect)
<bofh>
I should find out what specific activity I need to get Ce+3:YAG to scintillate, apparently you don't need much.
<kmath>
<mattieuMattieu> @stephentyrone @johnregehr @whitequark @FioraAeterna My house had a load-bearing sewer pipe - 6" cast iron, so I gu… https://t.co/g7zWKP9rDT
<mlbaker>
bofh: I just woke up to a realization
<bofh>
mlbaker: oh?
<mlbaker>
there needs to be an anime about Noam Chomsky
<bofh>
oh of course there does
<bofh>
...actually why *isn't* there one already?
<bofh>
also why the hell am I suddenly reminded of Jormungand?
<mlbaker>
yeah, i opened google and i was like "this surely exists, i mean, japan"
<mlbaker>
was disappointed :(
<UmbralRaptor>
bofh: no, seriously about that 1.25x. That's the structural factor that NASA requires to crew-rate a launcher.
<bofh>
UmbralRaptor: I'm not questioning that at all, I know it is.
<bofh>
22:41:04 <@UmbralRaptor> (Do balloon tanks count as load bearing plumbing?)
<bofh>
This was what got my comment^ :P
<UmbralRaptor>
ah
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<egg>
!wpn bofh, mlbaker, UmbralRaptor, whitequark, et al.
* Qboid
gives bofh, mlbaker, UmbralRaptor, whitequark, et al. an oxidizing cheque
<egg>
!wpn -add:adj load-bearing
<Qboid>
egg: Adjective added!
<mlbaker>
!wpn -add:adj bear-loading
<Qboid>
mlbaker: Adjective added!
<UmbralRaptor>
!wpn -add:wpn boss
<Qboid>
UmbralRaptor: Weapon added!
<UmbralRaptor>
!wpn egg && mlbaker
* Qboid
gives egg && mlbaker a Riemann string
<egg>
!meow mlbaker
* Qboid
meows at mlbaker
<mlbaker>
!meow Qboid
* Qboid
meows at Qboid
<UmbralRaptor>
!wpn -add:wpn excess
<Qboid>
UmbralRaptor: Weapon already added!
<UmbralRaptor>
!wpn -add:adj excessive
<Qboid>
UmbralRaptor: Adjective added!
<UmbralRaptor>
!wpn -add:adj intensive
<Qboid>
UmbralRaptor: Adjective already added!
<UmbralRaptor>
!wpn -add:adj insufficient
<Qboid>
UmbralRaptor: Adjective added!
<UmbralRaptor>
!wpn stats
* Qboid
gives stats a Markov hull
<UmbralRaptor>
!wpn stat
* Qboid
gives stat a moral alias with a plasma attachment
<UmbralRaptor>
grr
<SnoopJeDi>
I think it's -stats
<UmbralRaptor>
!wpn -stats
<Qboid>
UmbralRaptor: Total weapons: 1089. Total adjectives: 1241. Total possible combinations: 7313223010995.
<mlbaker>
how on earth are there so many combinations? |AxB| = |A| |B|, no?
<SnoopJeDi>
mlbaker, it's not just <adj> <wpn> but I don't really know how it works.
<UmbralRaptor>
^
<UmbralRaptor>
eg: * Qboid gives stat a moral alias with a plasma attachment
<UmbralRaptor>
2 wpns, 1 adj
<SnoopJeDi>
UmbralRaptor, isn't that 1 wpnj 2 adj? Moral and plasma?
<egg>
nah plasma is a wpn
<UmbralRaptor>
Nah, that's plasma as a weapon. Compare:
<egg>
!wpn mlbaker
* Qboid
gives mlbaker a Sagan
<UmbralRaptor>
* Qboid gives whitequark a tantalum amphibious pin
<UmbralRaptor>
<@UmbralRaptor> !wpn egg|work|egg
<UmbralRaptor>
* Qboid gives egg|work|egg a chi boron paint with a magma attachment