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.
<Ellied>
how the hell does thunderbolt 3 squeeze 40 goddamn gigabits per second down a single cable
<bofh>
¯\_(ツ)_/¯
<Ellied>
that's between four lanes IIRC, so only 10 gigabits per twisted pair, but that's still a fuckload
<Ellied>
that means a single bit spans like what, 2 cm travelling down the wires?
<bofh>
I think?
<UmbralRaptor>
3e8/10e9
<UmbralRaptor>
er
<UmbralRaptor>
;c 3e8/10e9
<kmath>
UmbralRaptor: 0.03
<Ellied>
don't forget that the speed of light in copper is ~2/3c
<kmath>
<Alex_Parker> Of the undergrad textbooks that you opted to keep and not sell back to the bookstore for ramen funds, which has bee… https://t.co/2EqbqcfkRr
<UmbralRaptor>
Good question
<Ellied>
I never sell my textbooks back to the bookstore because the prices they offer are completely pissing-on-the-floor insultingly low
<UmbralRaptor>
All hail international editions.
<Ellied>
new book: $230. still-new book, in original wrapper, sold back to Barnes and Noble: $030
<bofh>
UmbralRaptor: agreed.
<Ellied>
Six Ideas that Shaped Physics, Unit R is my favorite one that I still have, but as for actually useful, I'm expecting it to be my E&M book
<bofh>
I mean of paper books I bought *during* undergrad that were most useful, that honour easily goes to Abrikosov-Gor'kov-Dzialoshinskii. But that was bought out of curiosity, not for any course.
<bofh>
Course materials it's either my Intro Thermo text or the comprehensible QFT text (oddly enough that same course also used Weinberg, which despite being far higher-level and in-depth, I find I've used a *lot* less often than Zee).
<Ellied>
how is it only 6:45. It feels like it's 9 or 10
<kmath>
<Pinboard> “In the butt plug's case, the vulnerability had to do with Bluetooth” https://t.co/IOzL1rOj1g
* Ellied
stabs DST
<bofh>
Ellied: it really fucking does.
<bofh>
I blame the DST shift combined with the sunset timing.
<Ellied>
If I could change one thing about the season cycle, I'd make there be long days in the winter and short days in the summer. that way summer mornings will be cooler and the hot part of the day less brutal, while the cold in the winter will be offset by more light.
<Ellied>
I have no idea how to make that make thermodynamic or geometrical sense but hey
<Ellied>
maybe with an eccentric enough orbit that would be realized for at least one hemisphere
<Ellied>
I had the sound off when I played it the first time and was like "uh, okay?"
<egg>
!wpn bofh, Ellied, UmbralRaptor
* Qboid
gives bofh, Ellied, UmbralRaptor a Peregrine equivalency
* Ellied
stares at her PCB
<UmbralRaptor>
!wpn egg
* Qboid
gives egg a Soviet point
<Ellied>
this has become a rat's nest. I don't think I can fit the coincidence logic I want in without a full redesign.
<Ellied>
A Soviet point? I was just in the SCP channel where they were fighting about the Soviet Union for the 90th time, nice coincidence there
<bofh>
rofl
<UmbralRaptor>
It's a majority point.
<Ellied>
about half the channel occasionally says something like "Some of the founding beliefs of the communist revolution in Russia were good and should be celebrated" and then someone from the other half interprets that as "Soviet Russia was 100% good in every way" and then they start bickering about Stalin.
<bofh>
Ellied: oh so half the channel is tankies? god fucking damnit.
<Ellied>
Not half the channel. There are some that are more interested in the Soviet Union than others, but most of them are more quasi-Marxists and think that the Soviet Union was such a perversion of communism that it shouldn't even be called communist
<Ellied>
I've seen them argue enough to know that all of them fully believe that the Soviet Union was pretty horrible when all was said and done, and newcomers to the channel who have denied its crimes have been banned on that basis
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<egg>
uh, did Fiora disappear? Ꙩ_ꙩ
egg is now known as egg|zzz|egg
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<bofh>
egg|zzz|egg: uh she's in-channel...
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<bofh>
!u ?
<Qboid>
U+1D4FC MATHEMATICAL BOLD SCRIPT SMALL S (?)
<kmath>
<0xabad1dea> Didn’t twitter used to limit names to basic planes and emoji? anyways there is a mysterious arcane rune stuck to my name now sorry
<kmath>
<bofh453> So for the curious, the cuneiform symbol in my name is apparently: "AN.NAGA four times in cross shape = DALḪAMUN₄:… https://t.co/IOIVevn4GR
<bofh>
It actually kinda even looks like a whirlwind, honestly.
<bofh>
Or a small tornado
<bofh>
Ellied: so while a bit heavy-handed that honestly seems fairly reasonable by Marxist standards?
<bofh>
at least I'll take that over fucking tankies any day of the week
<FluffyFoxeh>
what's a tankie
<bofh>
FluffyFoxeh: hardline Stalinist
<FluffyFoxeh>
o
<bofh>
the term dates back to those in the West who supported the Soviet Union's decision to roll tanks into Hungary in 1956, hence "tank"ie.
<FluffyFoxeh>
I see :p
<bofh>
generally can be applied to anyone who identifies as communist who supports a (strongly?) totalitarian governing style.
<UmbralRaptor>
Upper left corner of the political compass, more or less.
<bofh>
...I just tried to right-click close a fly that landed on my laptop screen.
<UmbralRaptor>
I wish it were that easy to get rid of flies.
<kmath>
<_ElizabethMay> Bruce Wayne: Bats frighten me. It's time my enemies share my dread. Me: yeah look at these terrifying creatures https://t.co/0VcgOu2BAj
<BPlayer>
I am rather confident I found the gates of both MOSFETs, however, I am unsure if I got the drains and sources correctly, given that they seem to be reversed
<kmath>
<henryfhchan> @celestialweasel @Kazinsal @mjg59 If a web publisher prefers the old orthography they needs to swap out all the cha… https://t.co/4zqwYIvTeU
<kmath>
<henryfhchan> @celestialweasel @Kazinsal @mjg59 With a total repertoire of 80,000 CJK characters (and growing), many of which sol… https://t.co/QmaRXUv3b6
<egg|zzz|egg>
(this thread via whitequark, bofh, et al.)
<kmath>
<IVD_Registrar> A Proposed Update for #UTS37, “Unicode Ideographic Variation Database,” is in the works. This is to be added to Sec… https://t.co/2CAOEPHRbI
* egg|zzz|egg
pets the IVD
<egg|zzz|egg>
(can databases be petted?)
<Ellied>
I keep trying to use Eschema and then giving up
<Ellied>
It obviously doesn't have the specific components I'm looking for in its libraries, and creating a new component is fucking impossible
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<APlayer>
Uh, Ellied, does it matter what diode I use?
<Ellied>
Not really as long as it's not a Weird diode
<APlayer>
Define "Weird"
<Ellied>
(e.g. Zener, avalanche, LED, made of some high-band-gap material, etc)
<APlayer>
Ah
<APlayer>
On to determine if this diode is weird
<Ellied>
so a generic silicon diode like the 1N4148 or 1N4001-1N4007 should be fine
<Ellied>
most likely if it doesn't make a big deal about being a special kind of diode, it's fine
<APlayer>
It's currently soldered on and I can't see the number, but I make out 1N0
<APlayer>
Let me get it off real quick
<Ellied>
take your time
<egg|zzz|egg>
!wpn APlayer, Ellied, et al.
* Qboid
gives APlayer, Ellied, et al. a combinatorial projection
<APlayer>
1N4007
<APlayer>
Alrighty
<APlayer>
Now on to get this circuit down to a 25 * 38 mm board :D
<Ellied>
wow, fucking awesome, now I can add this particular component to my board, but now all the default components are gone
<Ellied>
truly amazing
<Ellied>
this software was clearly designed by electrical engineers
<egg|zzz|egg>
!wpn -add:wpn Snark
<Qboid>
egg|zzz|egg: Weapon added!
<Ellied>
fuck it. I'm going back to designing and laying out simultaneously.
<Ellied>
this is disappointing, we really need electronics design software that has a sane enough UI that people can actually use it
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<BPlayer>
Bad internet connection, sorry
<Ellied>
no worries, all you're likey to miss is me pissing off about kicad :P
<BPlayer>
This feels like a shifting puzzle game
* soundnfury
gives egg|zzz|egg a Boojum
* egg|zzz|egg
vanishes
<soundnfury>
did someone say something?
<soundnfury>
:)
<egg|zzz|egg>
<egg|zzz|egg> = 0, I'm awake!
egg|zzz|egg is now known as egg
<BPlayer>
I /think/ I found a layout
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<APlayer>
Ellied: It's very messy and my handwriting is a challebge for cryptography, but would you mind having a look at this? The dotted lines on the diagram are for the connections I plan to make on the reverse side of the board.
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<BPlayer>
Goddammit this internet connection sucks
<Ellied>
oooh, that looks like nice perfboard. I've never seen stuff with square holes before.
<Ellied>
er, square pads.
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<APlayer>
What the hell is going on
<Ellied>
I can't tell, does the P-channel MOSFET have the drain or the source on the middle pin?
<APlayer>
Left to right: Gate, Source, Drain
<APlayer>
Source is in the middle
<Ellied>
huh, alright.
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<APlayer>
When the mobile connection is better than the WiFi one
<APlayer>
Anyway, shouldn't disconnect anymore
<APlayer>
Did I miss anything since my last message?
<Ellied>
where does the 100k resistor connected to the gate of the p-channel/drain of the n-channel go? IIRC it should go to +5V, but it doesn't look like it.
<APlayer>
Oohh dang
<APlayer>
Yes
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<APlayer>
So I need to get the +5V somehow to the capacitors north pin?
<APlayer>
I guess I can do a connection by going around the RPi input pin
<APlayer>
There is some space on the perfboard there
<APlayer>
Also, this one is a rather old thing. From my father's workplace, where they used to prototype stuff.
<APlayer>
The hardware and the people working on it are long retired, and the perfboards and stuff were thrown away, so we picked it up
<APlayer>
(Also, Germany. We probably used different hardware than US based companies and Unis back in the day when globalization was not such a big deal yet)
<Ellied>
makes sense
<Ellied>
that 100k is supposed to be a pull-up to the +5V for the p-channel gate
<APlayer>
So, looks okay other than the missing 5V connection?
<Ellied>
I recall recommending that you put the capacitor to +5V instead of ground, so it would jump up when power is connected
<APlayer>
Yeah
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<BPlayer>
Don't ask me what happened, I am back now
<BPlayer>
Okay, so, I'm soldering now, but occasionally looking if anyone highlights me. Count it as being AFK :-)
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<Ellied>
I'm redesigning my PCB, so my attention is similarly occupied
<kmath>
<hashtagoras> Did You Know? The “academic job market” was named for the biblical Job, who endured not only endless unjust torment… https://t.co/4vHm534wtk
<egg>
bofh: finally getting around to solving #228 with #1622
<Qboid>
[#228] title: Keep the whole history | For the moment we compute the histories using `sampling_period == 0`, which results in large gaps in the trajectory at high timewarp (rendered as long straight line segments, see below). We should use `sampling_period == 1` instead, and downsample ourselves as needed when rendering.... | https://github.com/mockingbirdnest/principia/issues/228
<egg>
so your saves can be tens of megs rather than hundreds/thousands, while having no segments/interpolation artifacts in the histories!
<bofh>
Nice. Downsampling is the correct way to fix that, btw!
<egg>
bofh: of course, but downsampling has to be smart :-p
<egg>
(downsampling so the 3rd order Hermite interpolation matches, rather than the linear interpolation, fwiw)
<egg>
bofh: this is separate from the other downsampling we do when rendering trajectories, for maximum confusion :-p
<egg>
(there we render segments, and we walk along the trajectory with a fancy adaptive stepsize)
<egg>
(which I should document)
* egg
looks at the looming catbus
<bofh>
Beware of the catbus
<bofh>
Well I sure as fuck hope you're doing cubic splines and not linear >_>
<egg>
bofh: well for the rendering I draw segments
<egg>
bofh: tbh switching from drawing the raw segments of the trajectory to Hermite interpolating them was pessimizing for #228 while it remained, see the two screenshots
<Qboid>
[#228] title: Keep the whole history | For the moment we compute the histories using `sampling_period == 0`, which results in large gaps in the trajectory at high timewarp (rendered as long straight line segments, see below). We should use `sampling_period == 1` instead, and downsample ourselves as needed when rendering.... | https://github.com/mockingbirdnest/principia/issues/228
<egg>
you went from chords in the orbits to silly loopy nonsense
<bofh>
Ahh. Interesting, I wonder what the hell caused that. Runge phenomenon?
<egg>
bofh: interpolate significantly more than π and behold
<egg>
the outside loops are > 2π on one polynomial
<kmath>
YouTube - The Floppotron: Korobeiniki (Tetris Theme)
<bofh>
not bad, tho I still think the covers of Das Modell & Rasputin are better.
<bofh>
egg: in my defense, I'm far too used to periodic phenomena that I sometimes reflexively think of "well are you doing the range reduction correctly?" as my first question given a numerics issue.
<Ellied>
USB 2.0 is already really screaming fast, honestly. We only have one oscilloscope in the physics department with enough bandwidth to see the signal at full speed.
<Ellied>
3.0 is right out, 3.1/thunderbolt 3 more so
<kmath>
<mbeisen> highlight of reviewing stacks of applications is finding, and advocating for, great research proposals from researc… https://t.co/dIc8FOxVCm
<kmath>
<FioraAeterna> @bofh453 the head screenwriter apparently is extremely mad about people calling out his film and his response sugge… https://t.co/aN0Vr5zlLW
<UmbralRaptor>
^
<Iskierka>
why are the stone buildings exploding but not the metal ones
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<UmbralRaptor>
¯\_(ツ)_/¯
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<Iskierka>
and his response, wow
<Iskierka>
also I think the improbable equation is the least of things people complain about
<bofh>
"Claims priority, application Great Britain February 8, 1950 13 Claims. (Cl. 250-27) The invention relates to an electronic vacuum tube having characteristics making it adapted to perform the functions indicated by a function table, for example, the function table for addition, for subtraction, for multiplication, for division, or for a switching arrangement in which control of the individual selection
<bofh>
of more load circuits than there are control ...
<bofh>
... circuits may be effected."
<SnoopJeDi>
Yea. This was my first festival, so I knew turkey leg was the only option for some chow :)
<bofh>
Ahh.
<SnoopJeDi>
ooh I really like the Jekyll theme on that regex blog post. Except for the weird floating hamburger
<bofh>
Yeah, what the actual hell is that floating hamburger.