Area Updated 2025-07-16
Josephson voltage standard Updated 2025-07-16
The most practical/precise volt standard.
It motivated the definition of the ampere in the 2019 redefinition of the SI base units
The wiki page en.wikipedia.org/wiki/Josephson_voltage_standard contains amazing schematics of the device, apparently made by the US Government.
- youtu.be/VoRab8U2eS0?t=354 the desired output voltage is 10V
- youtu.be/VoRab8U2eS0?t=475 lists the three most commonly used 10V implementations currently:
- youtu.be/6pgGNJby1lw?t=296 gives the experimental setup used to compare two different references. Notably it involves a nanovoltmeter
Journey to the West Updated 2025-07-16
This is just the most charming of the Four Great Classic Novels.
The definitive television series adaptation is obviously Journey to the West. It just manages to capture all the charms of Sun Wukong and Zhu Bajie.
jq Updated 2025-07-16
Yet another awk-like domain-specific language to do things from the CLI in a ridiculously short humber of character? Oh yes.
Are we in a quantum computing bubble? Updated 2025-07-16
Electrical connector Updated 2025-07-16
Electrical resistivity and conductivity Updated 2025-07-16
Arithmetic logic unit Updated 2025-07-16
Electric guitar player Updated 2025-07-16
Karlsruhe Institute of Technology Updated 2025-07-16
Ciro Santilli's given name Updated 2025-07-16
"Ciro" is "Cyrus" from Cyrus the Great in both Portuguese and Italian (although with very different pronunciations), thus doubly appropriate given that Ciro Santilli was born in Brazil, and has Italian ancestry.
After he conquered Babylon in 539 BC from the hands Neo-Babylonian Empire, Cyrus the Great did a great service to the Hebrews by allowing war prisoners that were held in Babylon to back to their home Judea, thus terminating the Babylonian captivity. These Jews were imprisoned because they had previously fought a war or revolted against the Neo-Babylonian Empire and lost. As Wikipedia puts it:He is therefore viewed extremely positively in the good old book. Ciro was quite happy about this name choice by his father, given the human rights connotations of the figure and Ciro Santilli's self perceived compassionate personality.
According to Isaiah 45:1 of the Hebrew Bible, God anointed Cyrus for this task, even referring to him as a messiah (lit. 'anointed one'); Cyrus is the only non-Jewish figure in the Bible to be revered in this capacity.
Particularly fun things related to modern Cyrus are:
Because it belongs to some relatively obscure character of the Bible, the name it has been mostly passed on by writing to every single Christian country, and every single language came up with different way of saying it, because the only place they would possibly hear that name said out loud would be in Church!
As of 2020, the country in which the name is most popular in undoubtedly Italy. In Brazil, it is definitely not common, but also not completely unheard of either, e.g. Ciro Gomes is a notable Brazilian politician.
And Ciro responds to all the versions of the name that he knows of. These include:and glad to add any new ones as they come.
- English:
- direct English reading of "Ciro" as "See Roll". Not the most cultured, but its what things tend to converge to, especially in highly international environments where it would be impossible to try and learn the origin of everyone's name! So it's fine. Slightly too close to "zero" for comfort.
- Cyrus, the actual English version of the name. Ciro was so happy when his elderly English neighbour who went to Eton College, upon recognizing what Ciro was, immediately said: "Ah, Cyrus the Great!" He was the cutest, and he had some culture. Many/most English speaking people can't or won't be very sure about the spelling, but the sound of the name has a distinctly exotic feel to it, and the sounds are immediately recognized without sound ambiguity (unlike Ciro vs Zero).
- French:
- Portuguese: "See Ru" with accent on See, and rolling r, and very weak "u". Some people might have some doubt of how to spell it and will ask for confirmation if needed, though many/most will get it right. Not particularly exotic like it is for English speakers.
- Italian: "Chee Ro" with accent on Chee and rolling r. Widely understood and correctly spelled, more than in any other language. Not exotic at all, could be any random dude from Naples.
- "fratm Ciruzzo": reserved for the Napolitan mates. It means "my bro little Ciro" in Napolitan. The "m" in fratm is a possessive inflection ("my", "mio", but on the same word), and "frat" is of course something like he standard Italian fratello (brother).
- www.urbandictionary.com/define.php?term=fratm. "Fratello" is the Italian standard for "brother". "Fra'" appears to be a variant.
- Ciruzzo means "little Ciro", i.e. it is a diminutive of Ciro, or more precisely a term of endearment. In Italian the correct name is "Vezzeggiativi":
- "fratm Ciruzzo": reserved for the Napolitan mates. It means "my bro little Ciro" in Napolitan. The "m" in fratm is a possessive inflection ("my", "mio", but on the same word), and "frat" is of course something like he standard Italian fratello (brother).
- German: Kyrus. Because Cyrus the Great is known Kyrus II. (Cyrus the Second, his grandfather was also called Cyrus), Ciro once joked to a German friend that he should call him Kyrus III! He liked that.
He is actually quite happy when people use the name in their own language, because that means they understand the origin of the name.
Some Ciro's of interest:
Kardashev scale Updated 2025-07-16
Artificial gene synthesis Updated 2025-07-16
Note that this is a specific application of de novo DNA synthesis, e.g. polymerase chain reaction primers is another major application that does not imply creating genes.
Electromagnetic four-potential Updated 2025-07-16
A different and more elegant way to express Maxwell's equations by using the:instead of the:
AsciiDoc Updated 2025-07-16
ASCII porn Updated 2025-07-16
Collections and overviews:
- asciiart.website/index.php?art=people/naked%20ladies "Naked Ladies - Nude Women" category
- if you value medium over content, Ciro found two of the images reproduced in
asciiart.websiteabove also reproduced in the Bitcoin blockchain as described at: ASCII art, that should definitely turn you on, horny nerd
- if you value medium over content, Ciro found two of the images reproduced in
- www.reddit.com/r/ASCII_porn/ on Reddit boring
- www.vice.com/en/article/nepapk/ascii-pr0n-porn-predates-the-internet-but-its-still-everywhere-rule-34 ASCII Porn Predates the Internet But It's Still Everywhere by Vice News (2019)
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.
|
|
Tank Man |
by Ciro Santilli 00 |
2021 CC-BY-SA 4.0 \\ +-|-+
\\/ /|-+o
\\--+ / /o
/|\\ |/ /oo
| / ----- /oo
| / /oo
| +-------+oo
| oo+---+ooo
00 | oo oo
\\ +-|-+
\\/ /|-+o
\\--+ / /o
/|\\ |/ /oo
| / ----- /oo
| / /oo
| +-------+oo
| oo+---+ooo
00 | oo oo
\\ +-|-+
\\/ /|-+o
\\--+ / /o
/|\\ |/ /oo
/ ----- /oo
/ /oo
+-------+oo
oo+---+ooo
oo oo
xx
--
/||\
|--|
o||0
||
/\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: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/. Asia Updated 2025-07-16
Khan Academy Updated 2025-07-16
Kudos for being a not-for-profit. Also, anyone can create content: e-learning websites must allow students to create learning content. Oh, but TODO is possible for anyone to make content publicly visible? Course join links lik: www.khanacademy.org/join/MJZ6NSV7 require login. webapps.stackexchange.com/questions/165132/how-to-create-a-course-that-is-publicly-visible-without-the-need-to-login-on-kha If that's the case, it is a fatal flaw not shared by OurBigBook.com.
As iron sharpens iron, so one person sharpens another Updated 2025-07-16
Proverbs 27:17.
Klein-Gordon equation Updated 2025-07-16
A relativistic version of the Schrödinger equation.
Correctly describes spin 0 particles.
The most memorable version of the equation can be written as shown at Section "Klein-Gordon equation in Einstein notation" with Einstein notation and Planck units:
Has some issues which are solved by the Dirac equation:
- it has a second time derivative of the wave function. Therefore, to solve it we must specify not only the initial value of the wave equation, but also the derivative of the wave equation,As mentioned at Advanced quantum mechanics by Freeman Dyson (1951) and further clarified at: physics.stackexchange.com/questions/340023/cant-the-negative-probabilities-of-klein-gordon-equation-be-avoided, this would lead to negative probabilities.
- the modulus of the wave function is not constant and therefore not always one, and therefore cannot be interpreted as a probability density anymore
- since we are working with the square of the energy, we have both positive and negative value solutions. This is also a features of the Dirac equation however.
Bibliography:
- Video "Quantum Mechanics 12a - Dirac Equation I by ViaScience (2015)" at youtu.be/OCuaBmAzqek?t=600
- An Introduction to QED and QCD by Jeff Forshaw (1997) 1.2 "Relativistic Wave Equations" and 1.4 "The Klein Gordon Equation" gives some key ideas
- 2011 PHYS 485 lecture videos by Roger Moore from the University of Alberta at around 7:30
- www.youtube.com/watch?v=WqoIW85xwoU&list=PL54DF0652B30D99A4&index=65 "L2. The Klein-Gordon Equation" by doctorphys
- sites.ualberta.ca/~gingrich/courses/phys512/node21.html from Advanced quantum mechanics II by Douglas Gingrich (2004)
There are unlisted articles, also show them or only show them.