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.
<kmath>
<stephentyrone> Anything you can wear to work without raising eyebrows is by definition not punk. Corollary: suit more punk than h… https://t.co/wRAazg63Ug
<kmath>
<whitequark> @hikari_no_yume I've came into contact with an iPhone for the 1st time in my life recently and I feel *incredibly*… https://t.co/YGb4OktfMr
<egg|zzz|egg>
(I had touched a NeXT when I was very smol but that's probably not useful for that)
<egg|zzz|egg>
!wpn котя
* Qboid
gives котя a Eulerian ℻ which vaguely resembles a prime
<hattivat>
I've also never used an iPhone, I've only used a Mac once back when they still had CRTs
<hattivat>
it was pretty awesome in comparison to Windows 98, though
<Qboid>
U+A723 LATIN SMALL LETTER EGYPTOLOGICAL ALEF (ꜣ)
<UmbralRaptor>
bofh: the fun part with "dark as my soul" is that you can give the person a glass of milk instead :D
<egg|zzz|egg>
(the examples use images of course, because Unicode is still insufficient to properly write Egyptian)
<bofh>
egg|zzz|egg: wait, seriously? what's still lacking?
<bofh>
UmbralRaptor: LOL
<egg|zzz|egg>
bofh: descriptor for the nonlinearity of things
<egg|zzz|egg>
bofh: look at all the images
<bofh>
so I'm actually unfamiliar with the Unicode hieroglyphs block
<bofh>
it's pretty big, heck I barely know most of the cuneiform one.
<egg|zzz|egg>
!u
<Qboid>
U+E0EF PRIVATE USE-E0EF ()
<egg|zzz|egg>
wait crap no
<egg|zzz|egg>
that site actually is full of PUA shit
<egg|zzz|egg>
@#$%@$^@&
<egg|zzz|egg>
... even though it refers to the hieroglyphs in Unicode 5.2 in the title?
<egg|zzz|egg>
what
<Iskierka>
unicode heiroglyphs is just all the component blocks separately, but they need to be constructed into larger blocks
<Iskierka>
@bofh
<egg|zzz|egg>
yeah
<egg|zzz|egg>
there are proposals
<egg|zzz|egg>
bofh: e.g. to use hieroglyphs ideographically you need to stand them on a stick
* Iskierka
presumes it's at this point just a competition of who most neatly encompasses all known layouts
<egg|zzz|egg>
!u ?
<Qboid>
U+133FA EGYPTIAN HIEROGLYPH Z015 (?)
<egg|zzz|egg>
Iskierka: in a way that the UTC finds acceptable too
<egg|zzz|egg>
(also WG 2 I guess)
hattivat has quit [Ping timeout: 383 seconds]
<UmbralRaptor>
Does this make heiroglyphs sorta like hangul?
<egg|zzz|egg>
kind of I guess? but you can combine them really freely
<UmbralRaptor>
.choose hangul|nazgul
<UmbralRaptor>
;choose hangul|nazgul
<kmath>
UmbralRaptor: hangul
<UmbralRaptor>
!choose hangul|nazgul
<Qboid>
UmbralRaptor: Your options are: hangul, nazgul. My choice: nazgul
<egg|zzz|egg>
also you can use them ideographically
<egg|zzz|egg>
and many are syllabic rather than uniliteral
<egg|zzz|egg>
also consonants everywhere
<egg|zzz|egg>
!u
<Qboid>
U+F200 PRIVATE USE-F200 ()
<UmbralRaptor>
Vowels are arbitrary and/or fake. >_>
* UmbralRaptor
stares at English, Serbian, Arabic, and Hebrew.
<bofh>
UmbralRaptor: I'm a fan of Nazgûl too fwiw.
* egg|zzz|egg
strs t 'mbrlrptr
<egg|zzz|egg>
!wpn bofh
* Qboid
gives bofh a Galois rotation
<Ellied>
I forget if I've asked, do any of the linux users here have working hibernate? If so, a) do you have disk encryption set up, b) what kernel version?
<UmbralRaptor>
Ellied: Yes I think, though it's a bit high drain (battery runs down in a day or 3)
<Ellied>
I don't know of any reason why that would wear the battery down
<bofh>
^
<UmbralRaptor>
Maybe it's not a real hibernate, then?
<Ellied>
perhaps conflating suspend and hibernate?
<UmbralRaptor>
I can hear the disk spin down.
<bofh>
I don't have suspend-to-disk setup, but my laptop lasts a solid week in suspend-to-RAM mode so I've just never bothered.
<UmbralRaptor>
(also the fans)
<Ellied>
well, suspend-to-RAM should stop the disk and fans but keep the RAM powered
<Ellied>
suspend-to-disk ('hibernate') would save the RAM to the swap partition on the disk and then fully shut down, leaving the RAM unpowered
<UmbralRaptor>
Hm. Might be suspend, then.
<bofh>
Reality on a lot of modern systems is S3 doesn't just power DRAM refresh but also most of the EC, which is prolly why it has comparatively shite battery life nowadays.
<Ellied>
I've not had any trouble with RAM suspend, I'm mostly (as usual, primarily academically) interested in preventing the possibility of cold-boot attacks on encrypted storage
<Ellied>
encrypted storage is a little less useful when the key is just sitting there in powered memory while you're not using the machine
<UmbralRaptor>
"leave the app open to download faster" thanks, iOS. Great design there.
<UmbralRaptor>
(Incidentally, iOS does seem to have apps suspend more nicely than Android, since they tend to be paused more than shutdown, but still...)
<Ellied>
I suppose it's probably silly to expect a typical Chicago mugger to have the resources to do a cold-boot attack, but there's also RDMA (aaaaaaa)
<Ellied>
what would be ideal is if the disk encryption key were itself encrypted according to your login password when the screen is locked, but I've seen nothing suggesting that this is ever done
<Ellied>
bofh: All my old machines get very good battery life on suspend, but my newer HP doesn't even last a night. Is that why?
<bofh>
Ellied: quite plausible.
<bofh>
Ellied: I once had a Dell in the Pentium M generation that I once set to suspend to RAM then forgot about for almost 3 weeks and it powered back up fine.
<bofh>
this was with a LiIon battery that was so close to dead that it would run it for maybe 15 minutes normally.
<Ellied>
my toughbook loses negligible battery while on suspend. I can leave it in the car for a weekend on vacation or something and have it be still basically full when I get back (less so if it's winter and it got very cold)
<Ellied>
god, the Manjaro installer is *complete* shit now
<Ellied>
they moved to some new thing that completely abandoned LVM support and it apparently just encrypted the bootloader even though I did my very best to tell it not to do that
<Ellied>
why do you even need an encrypted bootloader, I don't get that
<bofh>
That's utterly stupid IMO. And why abandon LVM support, that shit's actually fucking useful.
<egg|zzz|egg>
!wpn bofh
* Qboid
gives bofh a venetian TRIAC which vaguely resembles a git
<bofh>
!wpn egg|zzz|egg
* Qboid
gives egg|zzz|egg a potassium symmetric map
<Ellied>
the installer even warned me "hey, you're proceeding with an unencrypted /boot partition, this might be a risk!! you can proceed anyway though" so I proceeded anyway and then on the first boot it asked me for my encryption key before GRUB loaded. :V
<bofh>
um.
<Ellied>
that wouldn't have been a dealkiller if it hadn't then immediately asked me to type my passphrase *again* to unlock the encrypted / :F
<Iskierka>
I don't think hibernate has been tested on this machine but the fact it's an option in menus implies it's technically available?
<Iskierka>
I think I set it to hibernate at very low battery + closed lid but I don't think it's ever gotten low enough to trigger
<Iskierka>
because 116 Wh on 6th-gen undervolted processor
<bofh>
Yeah, that's an astoundingly huge battery.
<Iskierka>
Becomes easier when it's two batteries :p
<UmbralRaptor>
Ellied: it's important to encrypt the bootloader, so that updates can be quickly ended. *stabs Motorola*
<bofh>
UmbralRaptor: oh if it's a Motorola phone you can unlock the bootloader fairly easily.
<bofh>
then flash sane recovery firmware, non-out-of-fucking-date Android, etc.
<UmbralRaptor>
bofh: I'm still bitter about the Droid 3. >_>
<UmbralRaptor>
Like, that was one of the phones they got sued over.
<Ellied>
my OnePlus 2 got EOL'd like 4 months after I got it. People raised a huge fuss on the forums, and OnePlus's reaction was basically "lol fuck off" and I think it never went further than that
<APlayer>
Customer service in a nutshell when it's them who is supposed to pay
<SnoopJeDi>
I'm bummed that Pebble got acquired :(
<UmbralRaptor>
Ellied: ow. At least it took 8 months to EOL the Droid 3.
<Ellied>
I mean, I got it when it was already a year or so old
<Ellied>
now I have LineageOS, which works about as well as you'd expect from seeing the decorum of the people in their IRC channel.
<Ellied>
(e.g. if I had any job where I had to work with someone who behaved like that to me IRL, I'd quit without notice)
<APlayer>
EOL?
<APlayer>
Someone also please add an egg-ronym
<Ellied>
someone remind me of the add-acr syntax :P
<egg|zzz|egg>
Ellied: !acr -add:ACRONYM Expansion
<Ellied>
!acr -add:EOL End of Life
<Qboid>
Ellied: I added the explanation for this acronym.
<kmath>
<Timrasett> Leute! @Timrasett und @HackneyYT können das Zeichen Limit überschreiten! Ihr glaubt uns nicht? Hier der ca. 35k Zei… https://t.co/B1njsR80qP
<egg|zzz|egg>
(what is fakeunicode going to do with that many codepoints)
<egg|zzz|egg>
!wpn e_14159
* Qboid
gives e_14159 a wave Bucket O' Nitrogens™
* e_14159
was frozen?
<soundnfury>
e_14159: more likely exploded, I'm imagining some sort of Krapotke chemistry
<kmath>
<Timrasett> Leute! @Timrasett und @HackneyYT können das Zeichen Limit überschreiten! Ihr glaubt uns nicht? Hier der ca. 35k Zei… https://t.co/B1njsR80qP
<Fiora>
i'm actually getting sporadic errors using twitter now
<Fiora>
i think we broke it
<egg|zzz|egg>
Fiora: oooo sneaky
<egg|zzz|egg>
the german tweet has a .cc/
<egg|zzz|egg>
in the middle
<Fiora>
lmfao
<UmbralRaptor>
We did it, internet! ✨
<Ellied>
Fiora: omg seriously, breaking the character limit is that easy??
<Ellied>
wish you could opt out of the "overwrite entire disk with random data" step in Debian disk encryption. sure, it's nice to have and all, but it takes an incredibly long time to run on any decent-sized disk
<Ellied>
like ok maybe if you're on a small NVMe SSD the time it takes will be negligible but a 1 TB spinning disk? christ
<egg|zzz|egg>
Fiora: but I'm confused, I thought twitter abbreviated overly long links in addition to counting them as 23 chars
<bofh>
egg|zzz|egg: I think it's a bug.
<bofh>
Ellied: also that's not a good thing to subject a SSD to tbh.
<Ellied>
yeah
<Ellied>
I've never owned an SSD, dunno if Debian does this for them or not
<egg|zzz|egg>
Iskierka: Fiora: bofh: you can use ' ' as a space
<egg|zzz|egg>
probably better alternatives tbh
<egg|zzz|egg>
!u
<Qboid>
What code point do you want me to look up?
<egg|zzz|egg>
...
<egg|zzz|egg>
!u ' '
<Qboid>
U+0027 APOSTROPHE (')
<Qboid>
U+2005 FOUR-PER-EM SPACE ( )
<Qboid>
U+0027 APOSTROPHE (')
<Ellied>
for hard disks it's also a decently good thing because it gives the disk software a chance to find all the bad sectors, I suppose
<Iskierka>
any SSD that was worth getting shouldn't care about a single-pass random data write
<Iskierka>
dunno if that's what debian limits it to though
<Ellied>
pretty sure it's a single pass
<Iskierka>
also not sure if it's necessary with how SSDs work, basically having a memory management unit but for sectors that have and haven't been used yet
<Iskierka>
data may well be quite randomly distributed to begin with
<bofh>
egg|zzz|egg: I'm personally a fan of '⠀'
<Ellied>
isn't it also much harder to recover zeroed (or in the case of most SSDs, oned) data in SSDs?
<bofh>
b/c it looks like a space but isn't classified as a space or break point.
<egg|zzz|egg>
!u '⠀'
<Qboid>
U+0027 APOSTROPHE (')
<Qboid>
U+2800 BRAILLE PATTERN BLANK (⠀)
<Qboid>
U+0027 APOSTROPHE (')
<egg|zzz|egg>
aaaaaaaaaa
<Iskierka>
possibly. I've not looked at data recovery since SSDs became a big thing, so I just remember the experiments where 36 attempts to wipe the disc with various patterns of data still left recoverable data
<Iskierka>
SSDs may be more wipe-able given they they're unstable on their own and sufficient writing will destroy the data on its own
<egg|zzz|egg>
bofh: yeah actually the things I suggested don't work
<egg|zzz|egg>
bofh: huh, neither does braille pattern blank
<egg|zzz|egg>
blarg
<egg|zzz|egg>
bofh: just write chinese
<bofh>
Huh. Dang.
<Iskierka>
presumably underscores do for old_sk00l word separation
<egg|zzz|egg>
bofh: but you can tweet the entire epic of gilgamesh if you want so,
APlayer has quit [Ping timeout: 383 seconds]
<Iskierka>
please do
<bofh>
egg|zzz|egg: in cunieform?
<egg|zzz|egg>
bofh: well yes, so you don't need spaces
<egg|zzz|egg>
bofh: or chinese poetry or whatever
<UmbralRaptor>
Zero (0) days since last use of a root terminal.
<UmbralRaptor>
(but at least Urvogel now has timezone settings moved from Chicago to New York)
<UmbralRaptor>
bofh: Very yes.
<UmbralRaptor>
Bonus points if you tweet both Akkadian and Sumerian versions.
<UmbralRaptor>
Incidentally, I've had terrible luck finding a translation that's meant to be read by anyone other than an archeologist.
<egg|zzz|egg>
bofh: but this is a valid tweet: http://晉太元中，武陵人捕魚為業。緣溪行，忘路之遠近。忽逢桃花林，夾岸數百步，中無雜樹，芳草鮮美，落英繽紛。漁人甚異之，復前行，欲窮其林。林盡水源，便得一山，山有小口，彷彿若有光。便舍船，從口入。.初極狹，纔通人。復行數十步，豁然開朗。土地平曠，屋舍儼然，有良田
<kmath>
<hexwaxwing> If you're wondering how twitter[.]com/Timrasett/status/926903967027785728 works: [27024-char domain name].cc/[3244… https://t.co/fxFfwwLqgo
<Ellied>
dammit, I got hit by the fix already
<Iskierka>
they removed it? ):
<UmbralRaptor>
;c 27024+3244
<kmath>
UmbralRaptor: 30268.0
<Ellied>
no, they limited it in some way. You can still post longer-than-usually-allowed things, but something in my attempt to post the epic of gilgamesh got caught.
<egg|zzz|egg>
Ellied: hmm
<egg|zzz|egg>
Ellied: what string where you trying
<egg|zzz|egg>
Ellied: seems you need to prefix with the protocol now?
<bofh>
LOL that's their workaround?
<Ellied>
mine has that, still no
* Iskierka
is bemused that tweets smaller than the size of an empty tweet page are breaking twitter
* egg|zzz|egg
tries it out
<egg|zzz|egg>
"Your Tweet was over 140 characters. You'll have to be more clever.
<egg|zzz|egg>
"
<egg|zzz|egg>
aha
<Ellied>
I shortened it incrementally and it worked long before it went down below 140 characters
<egg|zzz|egg>
this message seems to be a new thing (counter doesn't catch it)
<Iskierka>
yours are being converted to t.co links which I don't think are the same thing
<egg|zzz|egg>
message itself isn't new fwiw
<Ellied>
yeah, I my latest guess is that the shortener has a maximum length and it no longer defaults to posting the link verbatim if you go over that
<egg|zzz|egg>
Ellied: I'm simply not able to post my chinese poem url
<kmath>
<BiTransAlliance> 'Interestingly', it doesn't censor #straight and there's literal porn in the #straight hashtag that isn't blocked. https://t.co/SCstwDRSmF
<Ellied>
Long tweet exploit: fixed in minutes. Bisexual hashtag pictures blocked: [pending]. Nazis only shadowbanned in Europe: ? ?? ?? ????
<Iskierka>
? ? ?? ??? ?????
<Ellied>
Donald Trump's twitter taken down: 11 minutes. Donald Trump's twitter account allowed to continue existing: ?? ?? ??? ??
<bofh>
At this point I'm convinced twitter execs themselves are nazis.
<kmath>
<labspokane> @Chris_Gammell @eevblog @mightyohm Yes, even the nuclear reactor safety system has bodge wire! #HanfordBreactor https://t.co/6S4X2A7aPO
<UmbralRaptor>
Ellied: The twitter rules have an exception written in for Trump (the newsworthy thing)
<Iskierka>
but he's newsworthy because he's POTUS and that's not the POTUS account
<Iskierka>
private account should not receive the protection
<Ellied>
plus, it's a high-profile enough case that the twitter rules matter less than Twitter's right to act as a private company
<Ellied>
and it would probably be a decent economic choice since most of their users won't be mad enough to quit the site over it and will generate huge amounts of publicity for them
<Iskierka>
"this tweet is unavailable" aw
<Ellied>
god damn these photocouplers have dreadful bandwidth
<Ellied>
by really abusing it with output bias voltage and current, I can get it to about 200 kHz
<Ellied>
and an input with a really low duty cycle
<Ellied>
dropping the bias from 20 volts to 5 volts drops the bandwidth to no more than 40 kHz or so
<Ellied>
why don't they just make these things with photodiodes
<Ellied>
green brown black gold vs brown black green gold
<Ellied>
same goes for 300Ω (orange black brown gold) and 10kΩ (brown black orange gold)
<Iskierka>
this was *such* a good system
<egg|zzz|egg>
!wpn Ellied
* Qboid
gives Ellied a sectoral coilgun
<egg|zzz|egg>
!wpn -add:wpn resistor
<Qboid>
egg|zzz|egg: Weapon already added!
<Iskierka>
idea: most are numbers, even if via power, should've done it by breaking up the stripes so you count to the number
<Iskierka>
or similar not-lighting-sensitive method
<Ellied>
I feel really bad for the colorblind people taking electronics every year
<egg|zzz|egg>
(also would be a bit more accessible)
<egg|zzz|egg>
ninjaellied
<Ellied>
it's 2017, just print the damn value on the thing
<Iskierka>
especially as my experiments with android camera-based resistor readers are ... poor
<Ellied>
it would probably be cheaper to do that nowadays since you wouldn't need to get all those ink colors
<Iskierka>
it could potentially wear off which is why I'm thinking of broken up stripes to indicate quantity
<Iskierka>
could reasonably infer from size of intact sections what number it is approximately
<Ellied>
even if it's just printing the numbers that would correspond to each band in a row (e.g. 102 for 1kΩ)
<Ellied>
so print it a whole bunch of times?
<Iskierka>
or that
<Ellied>
color codes are cute but I think it's time to get rid of that particular pointless obstacle
<Iskierka>
plus are the colours actually defined by something more resilient than name or is there going to be variance by factory and run?
* Iskierka
notes that many digital colour charts have trouble distinguishing red and orange
<bofh>
^
<bofh>
22:48 <@Ellied> one IR LED at the input, multiple series photodiodes on the output.
<bofh>
assuming diffusion of the IR LED, you're going to get a proportional decrease in current, and this rapidly runs into issues, but yeah, this is at least theoretically possible.
<Ellied>
of course, it's not good for anything requiring any significant power
<Ellied>
that chip is intended to be used as a MOSFET gate driver, which I think is quite clever
<Ellied>
not only does it handle the occasionally-awkward voltage requirements at the gate for you, but it also happily floats around so you can effectively put the thing wherever you please
<Ellied>
the MOSFET wherever you please, that is.
<Ellied>
shame it's so expensive (almost $5 in small quantities!)
<bofh>
Like if you want to detect hard rising edges then a 741 should be more than fine, decrease the feedback gain on the differentiator?
<Ellied>
I've tried to shop for op amps a couple times but mostly only found two kinds: utter crap and prohibitively expensive
<egg|zzz|egg>
I should not look at @FakeUnicode during the week-end,
<bofh>
Ellied: so how many do you need? if it's on the order of 5-10, just free sample them from TI.
<egg|zzz|egg>
(I do keep a tab on that at work tho)
<Ellied>
you can free-sample quantities of 10?
<egg|zzz|egg>
(I might also have a tab with котя but that's rather harder to justify as work-related :-p)
<bofh>
Usually it's 5, but for some common stuff it's 10. I've seen it as low as 1 for "expensive" chips, depends on the part.
<Ellied>
huh
<Ellied>
what are the rate limits on free sampling? can you just sample a part once in your lifetime, or do they let you do it multiple times for the same?
<Iskierka>
probably common sense
<Ellied>
well I mean it's TI
<bofh>
Ellied: I did it once a month for a year once for PDIP OPA2134s and they didn't care.
<Ellied>
nice
<bofh>
(oh cool I should switch to OPA1642s now, sadly no PDIP ver)
<Ellied>
we, the fools we were, just bought 10 OPA380s
<Ellied>
although those are 5 bucks a pop so I bet a free sample would just have been 1
<bofh>
let me check
<bofh>
the answer is "500 Gateway Timeout on store.ti.com"
* bofh
golf clap
<Ellied>
huh
<bofh>
as in store.ti.com, the site, appears down.
<bofh>
also the heck did you need transimpedance amps for?
<Ellied>
photodiodes in a spectrometer
<Ellied>
something we really should have just use PMTs for, but I wanted to play with cheaper things
<Ellied>
store.ti.com loaded for me, just very slowly
<UmbralRaptor>
egg|zzz|egg: sorry about helping to discover pronouns are emoji in iOS?
TheKosmonaut is now known as glassdury
glassdury is now known as TheKosmonaut
<bofh>
there it loaded
<bofh>
Ellied: so my limit for samples of the OPA380 is 5.
<bofh>
so TIs high-end op-amps are just what the actual fuck
<bofh>
http://www.ti.com/product/THS3201 I have a bunch of these, can confirm the output rise and fall is *essentially* independent of the input step size.
<SnoopJeDi>
bofh, I would think Gateway competed with Dell and HP, not TI? ;P
<bofh>
heck even the OPA2134 has like THD+N 0.00005% @ 1kHz
<Ellied>
I never actually ended up using an OPA380 just because I moved on to LFCs, which have wayyy better dynamic range and we can actually use effectively with my new counter board