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.
<bofh> Egyptian is apparently a mess.
<bofh> But yeah, someone should standardize variation sequences for Sumero-Akkadian variational forms.
<bofh> So this becomes doable in a nice consistent manner.
<egg|zzz|egg> bofh: seems it's just a question of a font for the script, like CJK? variations are more of an intra-script thing for place names there
<egg|zzz|egg> s/script/language/g
<Qboid> egg|zzz|egg meant to say: bofh: seems it's just a question of a font for the language, like CJK? variations are more of an intra-language thing for place names there
<egg|zzz|egg> (with plans to encode that as VS, but still plans)
* egg|zzz|egg ought to zzz
<egg|zzz|egg> bofh: well egyptian really needs ~format chars, proposals are being refined
<egg|zzz|egg> their text is not very plain
<egg|zzz|egg> whereas cuneiform is
<egg|zzz|egg> rather more than cjk probably
<bofh> yeah, cuneiform & cjk are very similar in processing reqs, arguably
<egg|zzz|egg> like, this list is short http://home.zcu.cz/~ksaskova/Sign_List.html compared to the BMP's cjk & SIP & looming TIP
<egg|zzz|egg> bofh: cuneiform (simplified) :-p
<egg|zzz|egg> instead of Xsux we should have Xsut and Xsus :-p
* egg|zzz|egg zzz
<bofh> rofl, I approve.
<kmath> <whitequark> \r\n https://t.co/gTzSrFZj5M
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<egg|phone|egg> !Wpn whitequark
* Qboid gives whitequark an ones-complement shader
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<egg|phone|egg> Bofh: so I guess a sumeroakkadian input method should work like a Japanese one
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<bofh> egg|zzz|egg: that's pretty much what zethar said too
<kmath> <whitequark> \r\n https://t.co/gTzSrFZj5M
<kmath> <volatile_void> Remember twitter 8 years ago when people would advertise “follow back” in their bios? ⏎ ⏎ Same, but for otters. ⏎ ⏎ If yo… https://t.co/PlLEJwN7HH
<egg|zzz|egg> !wpn bofh
* Qboid gives bofh a bow taikonaut
<egg|zzz|egg> !wpn whitequark
* Qboid gives whitequark a dessicated bootstrap-like condenser
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<APlayer> SnoopJeDi: Remember that best fit problem we were talking about?
* UmbralRaptop stares at the implication of storing characters as floats. https://twitter.com/PlavchanPeter/status/986608258541469698
<kmath> <PlavchanPeter> This is the best; for the current generation of students, understanding the bit encoding of ascii characters and nu… https://t.co/CIXVcDrCgQ
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<egg|phone|egg> UmbralRaptor: went to Greenwich today
<UmbralRaptop> egg|zzz|egg: Any longitude shenanigans?
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<kmath> <TedRechlin> #VelociraptorAwarenessDay https://t.co/IgMHggiyT3
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<egg|cell|egg> UmbralRaptor: yup H1..4
<egg|cell|egg> Also stories of the astronomers royal
<egg|cell|egg> Flamsteed's widow had the instruments removed so Halley had to bring new ones
<egg|cell|egg> And then didn't calibrate things properly so his observations are useless
<UmbralRaptop> stabbity
<egg|cell|egg> UmbralRaptor: also the 28 inch refractor
<UmbralRaptop> !wa 28*2.54
<Qboid> UmbralRaptop: 28×2.54 = 71.12
<UmbralRaptop> Ah.
<egg|cell|egg> UmbralRaptor: nice eq mount
<UmbralRaptop> Onion dome!
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<SnoopJeDi> APlayer, sure
<SnoopJeDi> bofh, Knuth's talk about his Fantasia Apocalyptica is one of the best talks I've been to in my life
<SnoopJeDi> he more or less just walked through how he constructed the work, but it was a fascinating artistic process to see inside of
<SnoopJeDi> particularly cute: after doing a concordance of the Book of Revelations, "blasphemy" was one of the 167 terms that became the raw material for assigning motifs/etc., and since he was assigning different compositional styles to some words, he chose to assign the style of Schoenberg's 12-tone rows ("I chose the most perfect one") to it
<SnoopJeDi> Michael Duff's talk was also excellent but...BSM theories, feh!
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<APlayer> SnoopJeDi: So, I should set the partial derivatives = 0 and solve this as a linear system
<SnoopJeDi> right
<APlayer> Well, this one part is easier said that done
<SnoopJeDi> pretty concise summary of optimization
<APlayer> Because I have large sums (can't do this by hand, or at least not without filling up a whole notebook with it) and those are not linear equations
<APlayer> I can't just use the Gauss method or something on them
<SnoopJeDi> when you say "those are not linear equations" what are you referring to?
<APlayer> To the derivatives of the equations I mentioned
<SnoopJeDi> IIRC the sum of squared errors in your case was linear in all your coefficients, except for one that was inverted (just define a new symbol)
<egg|zzz|egg> !wpn UmbralRaptop
* Qboid gives UmbralRaptop a skew Колмогоров cabinet
<APlayer> The coefficients are in linear functions which are squared, summed and rooted, and this whole thing is then put in a ratio that looks like (term - 1) / term and then it is multiplied by another polynomial ratio
<APlayer> I guess if you maximally simplify it, you could get it down to some ultra ugly polynomial ratio, if it is not too big to fully fit on a single page
<SnoopJeDi> why are you taking the root? you can minimize Σe_i^2 directly
<APlayer> Because I am subtracting 1 from it
<SnoopJeDi> hm, you've lost me
<APlayer> The non-derivative term looks like sum from i = 0 to 8 (sqrt(((x_i - ax) / bx)^2 + ((y_i - ay) / by)^2 + ((z_i - az) / bz)^2) - 1)
<bofh> SnoopJeDi: huh, that's neat. I never knew Knuth did that, even. wow.
<SnoopJeDi> yea it's incredible and very much your shit
UmbralRaptop is now known as MagnetoRaptor
<egg|zzz|egg> !u 𒂍𒀀𒈾𒍢𒅕
<Qboid> U+1208D CUNEIFORM SIGN E2 (𒂍)
<Qboid> U+12000 CUNEIFORM SIGN A (𒀀)
<Qboid> U+1223E CUNEIFORM SIGN NA (𒈾)
<Qboid> U+12362 CUNEIFORM SIGN ZE2 (𒍢)
<Qboid> U+12155 CUNEIFORM SIGN IR (𒅕)
<APlayer> That is, vector magnitude of the individual axes where each axis is adjusted with two parameters, then you subtract 1 from the vector magnitude (because it should be as close as possible to 1, actually), and then you have one error term. I want to minimize the sum of 9 squares of such terms
<SnoopJeDi> bofh, he used a few bars from the Delphic hymn to Apollo to represent a set of church bells for each of the 7 churches mentioned in Revelations, with a slightly different harmonization for each such church
<SnoopJeDi> APlayer, the -1 is completely incidental as a constant: if you minimize the other piece, you've minimized that expression as well
<APlayer> The other piece?
<SnoopJeDi> i.e. d/d(anything) of a constant is zero, it only translates the *value* of the minimum
<SnoopJeDi> the one with your actual coefficients in it
<SnoopJeDi> I'm saying the -1 is a distraction
<APlayer> It's not just a -1
<APlayer> Its an (x-1)^2
<SnoopJeDi> oh, nvm, that's a completely different set of equations
<egg|zzz|egg> bofh: hmm even with both the transcription and the photo (for the complaint from nanni) I'm having trouble identifying which style of cuneiform this is
<SnoopJeDi> uhh, or is it, hang on, let me think about this.
<SnoopJeDi> APlayer, the sum of the squared errors is 2nd-order in all your coefficients, right?
<APlayer> I guess I could minimize x^2- 2x instead, where x^2 simplifies because of the root
<SnoopJeDi> O(a²)?
<APlayer> 2nd order?
<APlayer> Not sure I understand that, sorry
<SnoopJeDi> if I understood what you've written there, you have no terms higher in polynomial order than a^2
<APlayer> Ah
<SnoopJeDi> which means its derivative is no higher than 2-1, i.e. linear
<SnoopJeDi> so no, that's not an issue
<APlayer> The partial derivative has quadratic and inverse cubic terms in it
<APlayer> (Ask Wolfram Alpha)
<SnoopJeDi> APlayer, define a new constant cx = 1/bx etc.
<SnoopJeDi> new set of constants*
<APlayer> Ah, wait, no
<SnoopJeDi> it will be quadratic in those
<SnoopJeDi> and once you've solved for those, you just invert them to get the thing you *actually* want
<APlayer> No quadratic term, at least no quadratic term with the differentiation variable in it
<SnoopJeDi> this is seriously so much easier to understand if you manually work out how to fit a line for a bunch of points in the plane, btw
<SnoopJeDi> it's hard to visualize until you've toyed with it some
<APlayer> So, if V_mag_i is sqrt(((x_i - ax) / bx)^2 + ((y_i - ay) / by)^2 + ((z_i - az) / bz)^2), then, if I differentiate with respect to an a_x (offset), I get 2(x_i - a_x)(V_mag_i - 1) / (b_x^2 * V_mag_i). This is the same for any other axis' a-term, except that the x_i, a_x and b_x would be y_i (or z_i), a_y and b_y
<APlayer> b_x partial derivatives look rather similar, but the polynomial order of some parts of it is higher
<egg|zzz|egg> hm 𒅕 being pointy points towards the older style?
<APlayer> SnoopJeDi: The 1/bx constant does not help me because I am struggling with the fact that this whole term is not a linear or even quadratic equation
<APlayer> I have, in the worst case, terms with parts that have the differentiation variable with the power of -4 (I think?) and 0 (I think?). Actually var^(-3) * (var^2, stuff)^(1/2) and (var^2, stuff)^(1/2)
<APlayer> I can't just solve for "var", just like that
<APlayer> 1 / (var^3 * (var^2, stuff)^(1/2)), even
<bofh> egg|zzz|egg: just a sec
<egg|zzz|egg> bofh: also I'm really bad at reading actual tablets
<bofh> egg|zzz|egg: looks like standard late Sumerian cunieform that's been badly damaged and a bit weathered, particularly in the center, but I'm at best 75% sure on that assessment.
<APlayer> Ellied: You might enjoy this (from #KSPOfficial): https://i.imgur.com/qoAkHUe.jpg
<egg|zzz|egg> probably should use Santakku as the font or something like that
<bofh> SnoopJeDi: neat!
<Ellied> APlayer: pff
<bofh> https://twitter.com/ssontjens/status/986642898975363073 I "activated" a pizza once, that was annoying.
<kmath> <ssontjens> @Chemjobber @ChemScrapes Let he who has never “activated” food cast the first stone.
<iximeow> bofh: did you microwave it too much?
<bofh> iximeow: supposed to be 25 minutes in oven, turned into I think around 2.5 hours or so in oven when the fire alarm went off
<bofh> no, closer to 3.5 I think
<iximeow> fully activated!
<bofh> basically I forgot about it and hyperfocused on Subterranean Animism stage 5 Lunatic practise mode for way too long, lol.
<bofh> wtf did Southwest really send up a plane with a cracked fanblade???
<egg|zzz|egg> bofh: blarg not sure whether 𒍢 or 𒍣 in ea-nasir
<egg|zzz|egg> aside from that the first line seems to be consistent with the photograph with 𒀀𒈾 𒂍𒀀𒈾{𒍢,𒍣}𒅕
<egg|zzz|egg> in the santakku font
<bofh> I *think* the first of those two but let me take a better look.
<MagnetoRaptor> Random observation: my advisor apparently has trouble reading the emotional state of people on the spectrum.
<MagnetoRaptor> >_>
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<bofh> egg|zzz|egg: zethar sez: "Interesting. Also, it's pretty clear that it's Ur-III era cuneiform to me (It's easier to tell from the back side IMO)"
<egg|phone|egg> Bofh: why is lethargic not here
<egg|phone|egg> Um auto correct
<egg|phone|egg> Zethar
<egg|phone|egg> !Wpn bofh
* Qboid gives bofh an aberrant inexplicable popup that didn't used to be there and doesn't do what it used to
<bofh> !wpn egg|phone|egg
* Qboid gives egg|phone|egg a drunk [REDACTED]
<bofh> I'll try to drag them in :P
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<APlayer> !wpn bofh
* Qboid gives bofh a spicy point
<iximeow> bofh: is that what caused the engine failure?
<bofh> iximeow: the engine failure appears to be confirmed as separation of a turbofan fanblade at high speed, compare https://www.ntsb.gov/investigations/AccidentReports/Reports/AAR9801.pdf which is an investigation of a similar incident (the mechanism in this one is still unconfirmed and it *may* have occurred for a different reason, but the actual incident is essentially the same except this one happened
<bofh> well into cruise instead of at takeoff).
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<iximeow> agh i really want to read that but i need to do other things today
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<Ellied> wow cool alright I guess some weird update really did break connection sharing on all of my computers
<SnoopJeDi> evidently I don't know how to camera but https://i.imgur.com/xbA8s45.jpg
<Ellied> at least running dnsmasq manually works
<egg|zzz|egg> !wpn bofh
* Qboid gives bofh an ALGOL extradimensional cyclotron
<SnoopJeDi> extradimensional cyclotron you say
<SnoopJeDi> I wonder if Qboid means the traditional 6D phase space or something more
<bofh> Presumably the 6d one.
<SnoopJeDi> Vlasov flow \o/
<MagnetoRaptor> It's a way to build that one from the arXiv paper.
<SnoopJeDi> that wasn't a cyclotron AFAIK :P
<egg|zzz|egg> !wpn MagnetoRaptor
* Qboid gives MagnetoRaptor an oxygen penguin/heptagon hybrid
<egg|zzz|egg> !wpn bofh
* Qboid gives bofh a protected kitten
<egg|zzz|egg> !wpn zethar
* Qboid gives zethar a quiet quaternion
<egg|zzz|egg> !wpn whitequark
* Qboid gives whitequark a flail
<egg|zzz|egg> !wpn котя
* Qboid gives котя an accidentally quadratic theorem
<egg|zzz|egg> !wpn the котяchrome kitten
* Qboid gives the котяchrome kitten an inert 2N2222
<SnoopJeDi> bofh, also cool from last night's talk: visualizations of music by a local CS prof https://www.cdc.gov/nchs/data/series/sr_03/sr03_039.pdf
<SnoopJeDi> Knuth showed two results of that analysis on the Fantasia Apocalyptica that looked quite nice (one of the views had a cell-mitosis looking thing in it), although Dr. Davis said that's not online yet but should be soon
<bofh> NICE. I'll take a look at this later when I have a moment, thanks.
MagnetoRaptor is now known as UmbralRaptor
<egg|zzz|egg> !wpn UmbralRaptor
* Qboid gives UmbralRaptor a submersible catbus
<egg|zzz|egg> !wpn котя
* Qboid gives котя a wing
<egg|zzz|egg> bofh: please pet the kitten than Qboid gave you
* bofh pets the kitten accordingly
* UmbralRaptor pets the ネコバス.
<egg|zzz|egg> (bofh: note that it is protected, petting is probably a protected operation as per http://www.adaic.org/resources/add_content/standards/05rm/html/RM-9-4.html)
<egg|zzz|egg> bofh: probably going to go back to the british museum tomorrow, might try making some sense of the standard inscription (it is very legible)
<egg|zzz|egg> CDLI?
<Qboid> egg|zzz|egg: [CDLI] => Cuneiform Digital Library Institute
<egg|zzz|egg> 𒁹𒀸𒋩𒉽𒀀
<kmath> <tony873004> #TESS launches today onto the 1st of 3 phasing orbits. After a Moon flyby it will settle into a 2:1 resonance ensur… https://t.co/NXwU9WBB7A
<bofh> egg|zzz|egg: nice! try to take a picture if that's allowed.