ChaoticNeutralCzech

@ChaoticNeutralCzech@feddit.org

• ⁨Comment⁩ on ⁨⁩ ⁨⁨16⁩ ⁨hours⁩ ago⁩:

  It’s a laptop so the battery will keep the RAM powered. Very clever and practical, especially for files so confidential you only have one copy − data burglars will be looking for disks. /s

• ⁨Comment⁩ on ⁨Valid⁩ ⁨⁨1⁩ ⁨day⁩ ago⁩:

  Only asocial media

• ⁨Comment⁩ on ⁨What is the deal with IPv6?⁩ ⁨⁨2⁩ ⁨days⁩ ago⁩:

  denary

  Yes, that’s technically the correct 10th term in the Latin-based unary-binary-ternary-… sequence but nobody calls it that… I wondered what your mother tongue is but I couldn’t find a language in which the preferred name for “decimal system” would use den- rather than dec-, dek-, des- or a completely different word.

• ⁨Comment⁩ on ⁨New conspiracy theory just dropped⁩ ⁨⁨2⁩ ⁨days⁩ ago⁩:

  This is canon

  Minions marching across moon landing set

• ⁨Comment⁩ on ⁨⁩ ⁨⁨3⁩ ⁨days⁩ ago⁩:

  The piano key is plucked and then vibrates at its own natural frequency (plus in practice, higher modes aka harmonics/overtones). Wind instruments are designed to create continuous oscillation from constant flow of air by amplifying reflected waves with incoming air pressure energy (blowing straight into a cylinder won’t work, hence the weird pipe shapes, holes and reeds). Either way, they resonate at their design frequency. So do self-oscillating piezo buzzers. The speaker membrane, ideally, does not have a resonant frequency (responds equally to disturbances at any frequency between 20 Hz and 20 kHz) and needs to be pushed constantly to create sound. Like the membrane of a mechanical phonograph/turntable, the shape of the wave it should create is delivered to it in real time, except electromagnetically. That’s why player pianos need very little data (literal punch cards) to reproduce entire songs as opposed to audio recordings

• ⁨Comment⁩ on ⁨⁩ ⁨⁨3⁩ ⁨days⁩ ago⁩:

  Yup. When you add an electron to one end of a wire, the change in the electric field will be felt very quickly (high percentage of light speed) across the wire and the electrons, now outnumbering protons, will repulse and want to shed the extra one from any point in the wire.

  Like when you add an atom to a sealed gas container.

• ⁨Comment⁩ on ⁨⁩ ⁨⁨3⁩ ⁨days⁩ ago⁩:

  I could add to this analogy. Yes, the wind passes from a high-pressure point to a low-pressure one but that’s just direct current. The weather can change, reversing the wind every few minutes (alternating current) and you can still harvest it with a turbine (for example, a lightbulb filament or heater lights up in either polarity) but it wouldn’t help a ship with a basic sail travel to a destination (much like DC motors, it would change direction when polarity is reversed). And then there’s sound, akin to very quick polarity changes where particles never travel very far. It doesn’t carry much energy but the waves travel faster than wind and can be modulated with a signal to carry information. Both wired and wireless electronic communication is kind of like that.

• ⁨Comment⁩ on ⁨⁩ ⁨⁨3⁩ ⁨days⁩ ago⁩:

  There’s a HUGE number of electrons in everything with a massive total negative electric charge but almost exactly balanced by protons. That’s why electrons move very slowly in a conductor but still transmit lots of current (electric charge over time).

  Accumulating charge in a place is what charging a capacitor or battery is, it creates voltage (potential difference). Charges in an electric field store energy but also their presence/absence can represent data (DRAM and flash memory) and the field has various effects we can use, such as deflecting the beam in a CRT oscilloscope controlling the flow of electrons in an eectron tube or field-effect transistor.

  And the current also creates magnetic field with some similar effects (deflecting the beam in a TV CRT) and some different ones (attracting magnets in a motor, inducing current in a transformer’s secndary winding).

  Plus, both fields can oscillate a vast range of freequencies and travel in waves, making radio, microwave ovens, vision, UV sterilization, X-ray machines etc. possible (although each of these applications uses the properties of EM waves at specific frequencies differently).

• ⁨Comment⁩ on ⁨inception'd into reforming czechoslovakia⁩ ⁨⁨4⁩ ⁨days⁩ ago⁩:

  Which Czechoslovakia? The states over its history were quite different.

  • First Czechoslovak Republic (1918-1938)
    • Declared as Austria-Hungary fell apart at the end of WWI. Industrial powerhouse dismantling Austro-Hungarian power structures, investment in modernizing rural Slovakia" nationality
  • Second Czechoslovak Republic (1938-1939)
    • Beaten into submission by superpowers signing the Munich agreement that was supposed to appease Nazi Germany but nobody believed that would hold
  • Protectorate of Bohemia & Moravia + Slovak Staat (1939-1945)
    • Two Nazi puppet states, not actually called Czechoslovakia. The democratic government fled to London and helped organize dissent via radio + sent elite paratroopers to sabotage the arms industry and assasinate the Protector
  • Third Czechoslovak Republic (1945-1948)
    • Struggling to restore democracy with the Soviet-puppeted Communist Party’s influence; controversial expulsion of Germans that was a humanitarian disaster and a massive brain drain
  • Czechoslovak Socialist Republic (1948-1989)
    • After Communists gained majority vote, they did a coup d’etat and Czechoslovakia became a Soviet puppet state. Collectivization and Stalinist purges in the 50s, hopes of democratization in 1968 crushed by Soviet invasion (the only success was that Slovaks gained more independence and it became a federation because the Soviets didn’t care), largely passive submission but moderate living standards increase in the 70s and 80s
  • Czech and Slovak Federative Republic (1990-1992)
    • After the Berlin Wall fell, it was obvious the Soviet sphere of influence wouldn’t hold so on the next protest opportunity (legal marches on 1989-11-17, 50th anniversary of protests for a Nazi-assasinated student), dissent members spoke out and a general strike announced; police beat some protesters but nobody died, hence "Velvet Revolution"
    • Wild privatization started, people could get rich or poor overnight as the economy turned inside out
  • Czech Republic & Slovakia
    • Created after Slovak politicians wanted more independence and everybody was just trying to comprehend the market changes so nobody really complained and a no-fault divorce was scheduled on 1993-01-01
    • The countries went their own ways and it’s clear there will most likely never be a Czechoslovakia again
• ⁨Comment⁩ on ⁨A classic movie⁩ ⁨⁨4⁩ ⁨days⁩ ago⁩:

  There are 2 likely original word orders, just search for both

  en.wikipedia.org/…/The_Adventures_of_Sharkboy_and…

• ⁨Comment⁩ on ⁨Marriage⁩ ⁨⁨4⁩ ⁨days⁩ ago⁩:

  Find an old post of it then. Or another photo from that place.

• ⁨Comment⁩ on ⁨Marriage⁩ ⁨⁨4⁩ ⁨days⁩ ago⁩:

  Probably fake

  See my comment last time this was posted

• ⁨Comment⁩ on ⁨As a small farm owner, no image has ever been more accurate⁩ ⁨⁨5⁩ ⁨days⁩ ago⁩:

  I like how many kinds of leftovers can be given to chickens. The only limitation is that they have to get curious enough to peck at it. They’ll ignore some delicious shit on their regular food plate if it’s the “wrong” shape and color.

• ⁨Comment⁩ on ⁨⁩ ⁨⁨6⁩ ⁨days⁩ ago⁩:

  There are actually two interpretations of N/A:

  • N/A (not available): There is lost media so it can’t be evaluated.
  • N/A (not applicable): The show is in sign language so evaluating that is outside the scope of this string-matching program.

  Meanwhile, undefined seems to mean the value has not yet been evaluated. Maybe null is really the best.

• ⁨Comment⁩ on ⁨⁩ ⁨⁨1⁩ ⁨week⁩ ago⁩:

  There are different kinds of non-number “values” for numeric variables. Is this ∞, Overflow, NaN or N/A?

• ⁨Comment⁩ on ⁨An 82-year-old YouTuber grandma was raided by police and SWATs during her live stream last night where she plays Minecraft to raise money for her grandsons cancer. Authorities brought 20 police cars⁩ ⁨⁨1⁩ ⁨week⁩ ago⁩:

  I’m afraid “Watch Streamer Get Swatted” is a saturated market. Likely breaking the age record may help though

• ⁨Comment⁩ on ⁨Does anybody actually work from 09:00 to 17:00⁩ ⁨⁨1⁩ ⁨week⁩ ago⁩:

  Factory jobs are 6-14 and 14-22 (and 22-6 if there’s a rush), and office jobs usually 7-15, including a 30-min break

• ⁨Comment⁩ on ⁨New mrbeast video is dark⁩ ⁨⁨1⁩ ⁨week⁩ ago⁩:

  Those two, and many others, paid to get excluded from the draw. Finances the whole enterprise.

• ⁨Comment⁩ on ⁨How do I type an apostrophe and use print screen on a European Spanish keyboard?⁩ ⁨⁨1⁩ ⁨week⁩ ago⁩:

  Zalgo generators often have a settable range for the random number of diacritics per letter. If it includes 1 and you’re (un)lucky, you can get oops-all-acutes. Manually, you can copy the combining character alone (not easy, as you can’t usually select it, but you can use web apps or UnicodePad) and paste one after every letter.

  Combining diacritics actually include some overlays (s̸l̸a̸s̸h̸e̸s̸, s̶̶t̶̶r̶̶i̶̶k̶̶e̶̶t̶̶h̶̶r̶̶o̶̶u̶̶g̶̶h̶, not⃠, bo⃞x etc.) and allow for vertical text without newlines (although support for characters except aeioucdhmrtvx is spotty). Great for Kahoot names if the host machine runs Windows and displays them in a column, as opposed to overlaid like on Android.

  ͩͤͭͣͮͥͭͦͫ

• ⁨Comment⁩ on ⁨How do I type an apostrophe and use print screen on a European Spanish keyboard?⁩ ⁨⁨1⁩ ⁨week⁩ ago⁩:

  It’s Zalgo (putting combining diacritics on every letter) but mild and consistent, plus I used native avcented characters if available to improve rendering consistency

  àèìǹòùẁỳ
  áćéǵíj́ḱĺḿńóṕŕśúẃýź
  

• ⁨Comment⁩ on ⁨How do I type an apostrophe and use print screen on a European Spanish keyboard?⁩ ⁨⁨1⁩ ⁨week⁩ ago⁩:

  T́h́é fóŕẃáŕd́ t́íćḱ íś áćt́úáĺĺý ćáĺĺéd́ áćút́é àǹd̀ t̀h̀è b̀àc̀k̀t̀ìc̀k̀ ìs̀ à g̀r̀àv̀è

• ⁨Comment⁩ on ⁨[deleted]⁩ ⁨⁨1⁩ ⁨week⁩ ago⁩:

  Are people even allowed to vote for their own country?

• ⁨Comment⁩ on ⁨🫡🫡🫡⁩ ⁨⁨1⁩ ⁨week⁩ ago⁩:

  We’ve known about coronaviruses since the 1960s

• ⁨Comment⁩ on ⁨oh no guys theyre gonna report us to the FBI⁩ ⁨⁨1⁩ ⁨week⁩ ago⁩:

  Reverse image search says The Triplets of Belleville

• ⁨Comment⁩ on ⁨When traffic comes to a standstill, drivers instantly shift left and right to create a Rettungsgasse, an emergency corridor right down the middle, so ambulances⁩ ⁨⁨1⁩ ⁨week⁩ ago⁩:

  Well, it’s a high-speed 3-lane road that would fit 5 parked cars curb to curb so Rettungsgasse is where the space goes. Most other roads can barely yield 1 lane but emergency drivers are skilled and European fire trucks are not 1.5 lanes wide; still better to use a narrow free lane between 2 stationary ones rather than one of 2 crawling ones

• ⁨Comment⁩ on ⁨iHave a Lovesick Teacher⁩ ⁨⁨1⁩ ⁨week⁩ ago⁩:

  That’s where the calculus comes in, otherwise it’s a basic Pythagorean theorem. I’ve compiled a list of possible latitudes, knock yourself out

• ⁨Comment⁩ on ⁨iHave a Lovesick Teacher⁩ ⁨⁨1⁩ ⁨week⁩ ago⁩:

  Except now the walking speed of 1 m/s (3.6 km/h) and running speed of 5 m/s (18 km/h) are realistic

• ⁨Comment⁩ on ⁨iHave a Lovesick Teacher⁩ ⁨⁨1⁩ ⁨week⁩ ago⁩:

  Instructions unclear, let’s assume he started 1,312,593,975 feet further back (see my other comment)

• ⁨Comment⁩ on ⁨SBA #119 maths⁩ ⁨⁨1⁩ ⁨week⁩ ago⁩:

  CASIO calculators say 1, and I think it’s more intuitive with “÷2π” being equivalent to “÷(2×π)” rather than “÷2×π”. It took me a while to figure out why my results were almost but not quite one order of magnitude wrong after I was forced to switch to TI.

• ⁨Comment⁩ on ⁨iHave a Lovesick Teacher⁩ ⁨⁨1⁩ ⁨week⁩ ago⁩:

  You actually only need to know the latitude for that… except the local terrain will play a larger role anyway, unless they started very close to a pole and follow rhumb lines (in this case a meridian/circle of latitude) as opposed to great circles, so better just ask for full coordinates.

  We don’t have many data points in the question so let’s extrapolate into the past. There is the hint that they met 8 years earlier at the same spot, during which he’d have gone 1 262 304 000 ft or 384 750.2592 km, completing 9.617 polar circumferences of the Earth (40 007.863 km each).

  Huh, that’s not a whole number. In some languages, “eight long years” might mean “a little over 8 years” so let’s assume he finished exactly 10 polar circumnavigations, which took 8 years and about 116 days. Her walked distance over that time is 5x smaller, 2 polar circumnavigations’ worth or 80 015.726 km. This is only exactly 2 great circles if they are polar, but we know that it’s impossible to go due east from either pole. Therefore, she must have gone around a circle of latitude. To end up in the same spot, she must have not-quite-circumnavigated-but-enough-for-Phileas-Fogg the Earth (aka crossed every meridian but not the equator) an integer number of times. After a simple conversion, we can construct a table of the options.

  To calcuate latitude from circle-of-latitude circumference (colc), we’ll be using geodetic ↔ ECEF conversion equations (except those with the perverse prime vertical radius of curvature 𝑁 of course) and their notation (simplified with 𝑦 = 0, 𝜆 = 0, ℎ = 0 to ignore longitude and elevation) with values of the WGS-84 ellipsoid. The relationship we’re seeking is between colc/2𝛑 = 𝑝, circle-of-latitude radius, which is at zero longitude equal to ECEF 𝑋, and 𝜙 (latitude). See also Wikipedia on Earth radius by location but remember to skip anything with 𝑁, we’re not doing that.

  The geocentric radius (𝑅) is related to 𝜙 (latitude) like this but we only need the distance to axis of rotation 𝑝.

  (𝑍/𝑝)(cot 𝜙) = (1 − 𝑒²) → (𝑏²/𝑎²)(𝑍/𝑝) = 1/(cot 𝜙) = tan 𝜙 → 𝜙 = atan((𝑏²/𝑎²)(𝑍/𝑝))
  (using 𝑒² = 1 −  𝑏²/𝑎²)

  Since sin² 𝛂 = 1 − cos² 𝛂 and we can normalize 𝑍 and 𝑝 to the unit circle with ellipsoid radii 𝑏 and 𝑎 respectively:
  𝑍²/𝑏² = (𝑍/𝑏)² = 1 − (𝑝/𝑎)² = 1 − 𝑝²/𝑎², therefore 𝑍 = √(𝑏²(1 − 𝑝²/𝑎²)).

  All in all, 𝑝 → 𝜙 conversion is:
  𝜙 = atan((𝑏²/𝑎²)(√(𝑏²(1 - 𝑝²/𝑎²))/𝑝))

  (Presumably, this could be simpified further but since I can just put this into a calculator so idc)
  Per WGS-84:
  𝑎 = 6378.137 km
  𝑏 = 6352.752 km

  Here are the results. Finding appropriate meeting locations at some of the 25+ possible latitudes on either hemisphere is left as an exercise to the reader.

  nqcbefPFs	colc = 2𝛑𝑝 [km]	Latitude [°N/°S]
  1	too big	N/A
  2	6 367.449	3.277975
  3	4 244.966	47.934779
  4	3 183.724	59.758044
  5	2 546.979	66.211738
  6	2 122.483	70.346611
  7	1 819.271	73.238734
  8	1 591.862	75.380740
  9	1 414.988	77.033209
  10	1 273.489	78.347789
  11	1 157.718	79.419029
  12	1 061.241	80.309059
  13	979.607	81.060439
  14	909.635	81.703329
  15	848.993	82.259706
  16	795.931	82.745975
  17	749.111	83.174629
  18	707.494	83.555355
  19	670.257	83.895779
  20	636.744	84.201988
  21	606.423	84.478901
  22	578.859	84.730536
  23	553.691	84.960206
  24	530.620	85.170671
  25	509.395	85.364245
  26	489.803	85.542885