ARTIQ Updated +Created
Electromagnetic four-potential Updated +Created
A different and more elegant way to express Maxwell's equations by using the:instead of the:
AsciiDoc Updated +Created
ASCII porn Updated +Created
Collections and overviews:
You just couldn't resist Googling it and clicking this page, could you? You naughty, naughty bearded programmer nerd. Yes, I'm talking to you.
TODO it is quite hard to actually find non-automatically generated ASCII art of people fucking, most of them are just sexy/horny women drawn by bearded nerds, likely and based on sticky physical paper porn magazines from the 80's, good old days.
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   Tank Man                         |
   by Ciro Santilli          00     |
   2021 CC-BY-SA 4.0          \\  +-|-+
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                    \\--+ / /o
                   /|\\ |/ /oo
            |     / ----- /oo
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     00     |   oo     oo
      \\  +-|-+
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Code 1.
Tank man ASCII art by Ciro Santilli (2021)
This image depicts the Chinese government fucking 1 million Chinese people in the ass during the Tiananmen Square Protests, which was undoubtedly one of the largest gang bangs of the late 20th century:
Video 1.
The IBM 1401 mainframe runs "Edith" by CuriousMarc
. Source. 1960's punched card ASCII porn. Vintage. EDITH is also mentioned e.g. at: www.threedee.com/jcm/aaa/index.html. No ASCII uploads found however: www.reddit.com/r/programming/comments/a2pser/the_ibm_1401_mainframe_runs_edith/.
ASCII typeface Updated +Created
Tis term was invented by Ciro Santilli, it refers to ASCII art of text, essentially creating a typeface. in that medium..
Asia Updated +Created
As iron sharpens iron, so one person sharpens another Updated +Created
Proverbs 27:17.
New International Version:
As iron sharpens iron, so one person sharpens another.
Aspen HYSYS Updated +Created
Video 1.
Aspen Hysys Introduction by Emmanuel Oloyede (2016)
Source. Holy crap, the UI is identical to Microsoft Word with that huge top bar!!!
Associative array Updated +Created
More commonly known as a map or dictionary.
Asterism (astronomy) Updated +Created
Carl Jung Updated +Created
Cartesius (1974) Updated +Created
Cat 5e Updated +Created
This is the most common home "ethernet cable" as of 2024. It is essentially ubiquitous. According to the existing Ethernet physical layer, the maximum speed supported is 2.5 Gbit/s.
Video 1.
Cat 5e cable stripped
. Source.
Cavendish Laboratory Updated +Created
Cayley-Dickson construction Updated +Created
Constructs the quaternions from complex numbers, octonions from quaternions, and keeps doubling like this indefinitely.
Cheap robot Updated +Created
Chicago Updated +Created
Chorus effect Updated +Created
Atomic clock Updated +Created
Video 1.
How an atomic clock works, and its use in the global positioning system (GPS) by EngineerGuy (2012)
Source. Shows how conceptually an atomic clock is based on a feedback loop of two hyperfine structure states of caesium atoms (non-radioactive caesium-133 as clarified by the Wikipedia page). Like a quartz clock, it also relies on the piezoelectricity of quartz, but unlike the quartz clock, the quartz is not shaped like a tuning fork, and has a much larger resonating frequency of about 7 MHz. The feedback is completed by producing photons that resonate at the right frequency to excite the caesium.
Video 2.
Inside the HP 5061A Cesium Clock by CuriousMarc (2020)
Source.
A similar model was used in the Hafele-Keating experiment to test special relativity on two planes flying in opposite directions. Miniaturization was key.
Contains a disposable tube with 6g of Caesium. You boil it, so when it runs out, you change the tube, 40k USD. Their tube is made by Agilent Technologies, so a replacement since that opened in 1999, and the original machine is from the 60s.
Detection is done with an electron multiplier.
youtu.be/eOti3kKWX-c?t=1166 They compare it with their 100 dollar GPS disciplined oscillator, since GPS satellites have atomic clocks in them.
Video 3.
Quick presentation of the atomic clock at the National Physical Laboratory (2010)
Source. Their super accurate setup first does laser cooling on the caesium atoms.

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