Authy Updated 2025-07-16
Autodidacticism Updated 2025-07-16
There are two types of people:
- those who are autodidacts
- those who didn't really learn
Some possible definitions:
Thus OurBigBook.com.
Average number of steps spent on a node of a Markov chain Updated 2025-07-16
TODO how to calculate
Git tips How to modify the commit tree Updated 2025-07-16
Image generation Updated 2025-07-16
Martial art Updated 2025-07-16
Quantum control system Updated 2025-07-16
Some people call it "operating System".
The main parts of those systems are:
- sending multiple signals at very precise times to the system
- reading out some quantum error correction bits and sending error correcting signals back in a control loop
Quran character Updated 2025-07-16
Samurai cinema Updated 2025-07-16
Space exploration organization Updated 2025-07-16
Spacetime interval Updated 2025-07-16
In the Galilean transformation, there are two separate invariants that two inertial frame of reference always agree on between two separate events:
- time
- length, given by the Pythagorean theorem
However, in special relativity, neither of those are invariant separately, since space and time are mixed up together.
Note that this distance can be zero for two events separated.
Electronic band theory Updated 2025-07-16
How are the bands measured experimentally?
Why are there gaps? Why aren't bands infinite? What determines the width of gaps?
Bibliography:
- Applications of Quantum Mechanics by David Tong (2017) Chapter 2 "Band Structure"
Pixel Updated 2025-07-16
Special orthogonal group Updated 2025-07-16
The best personal webpages of all time Updated 2025-07-16
These are basically technically minded people that Ciro Santilli feels have similar interests/psychology to him, and who write too much for their own good:
- cat-v.org
- gwern.net. Dude's a bit overly obsessed with the popup preview though! "new Wikipedia popups (this 7th implementation enables recursive WP popups)" XD
- settheory.net by Sylvain Poirier
- HyperPhysics
- Orange Papers
Maybe one day these will also be legendary, who knows:
Another category Ciro admires are the "computational physics visualization" people, these people will go to Heaven:
Related:
Institution led:
- www.biology.arizona.edu/ The Biology Project
Other mentions:
- arngren.net/ lots of images of toys and gear with descriptions in Norwegian
Radio transmitter and receiver Updated 2025-07-16
The best popular Brazilian music (MPB) of all time Updated 2025-07-16
It is such a huge shame that you have to understand Portuguese to appreciate those songs... this is yet another great evil outcome of having more than one natural language is bad for the world.
The good songs stopped before of just after Ciro Santilli was born, they were originally heard by his parent's generation. Those young new kids are boring.
The place to start is definitely the Holy Trinity of popular Brazilian music:
- Caetano Veloso is arguably Ciro Santilli's favorite MPB artist, he has just too many amazing songs, best ones at: Section "The best Caetano Veloso songs"
- Chico Buarque. Ciro's second favorite.
- Gilberto Gil. Perhaps Ciro likes him third because he is the most lighthearted one, although not always: Section "The best Gilberto Gil songs"
Video 1. Preciso Me Encontrar by Cartola. Source. Present in the 1976 eponymous album though it is likely from much earlier.Video 2. Asa Branca by Luiz Gonzaga. Source. Translation: "White wing". Written in 1947Video 3. O vento by Dorival Caymmi (1949)Source. Translation: "The wind".Video 4. Panis et Circenses from the Tropicália: ou Panis et Circencis (). Source. Translation: "Bread and circuses", a famous Latin phrase. Composed by Gilberto Gil and Caetano Veloso and performed by Os MutantesVideo 5. Mistério do Planeta from the Acabou Chorare album by Novos Baianos (1972)Source. Translation: "The mystery of the planet".Video 6. "Senhor Cidadão" from the Se O Caso É Chorar album by Tom Zé (1972)Source. Translation: "Mr. Citizen". This is likely reference to Military dictatorship in Brazil-lingo. This is an anti-Military dictatorship in Brazil song, appears to reuse terms used by the dictatorship propaganda in the song.Video 7. Marimbondo from the "Pirão de Peixe com Pimenta (1977)" album by Sá & Guarabyra (1977)Source.Video 8. Romaria by Renato Teixeira. Source."Romaria" is the name of a type of Catholic peregrination.Video 9. Metamorfose ambulante by Raul Seixas (1973)Source. Translation: "Itinerant metamorphosis". From the album Krig-ha, Bandolo!Video 10. Ouro de tolo by Raul Seixas (1973)Source. Translation: "Fool's gold". This dude should be a scientist. But well, he went for mystic/artist. Close enough.Video 11. Gita by Raul Seixas (1974)Source. "Gita" must be a reference to the Bhagavad Gita. From the album: Gita.Video 12. Maluco beleza by Raul Seixas (1977)Source. From the album O Dia em que a Terra ParouVideo 13. A telicidade by Tom Jobim (1958)Source. Translation: "Happiness". Composed for the Black Orpheus (1958) film. "Tristeza não tem fim, felicidade sim" (Sadness never ends, but happiness does). The movie itself is OK. Appeals to Ciro's Buddhist sensibilities.Video 14. Chega de saudade by Tom Jobim. Source. Translation: "Enough longing".Video 15. Jorge da Capadócia by Jorge Ben Jor (1975)Source. From the Solta o Pavão (1975) album. The Caetano interpretation is better however, poor Jorge.- Jair Rodrigues
Video 16. Disparada by Jair Rodrigues (1968)Source. This song is simply amazing. Not exactly MPB, a bit more towards country, but close enough. This was as the track of some soap opera.Video 17. Deixa Isso Pra Lá by Jair Rodrigues (1964)Source. Fantastic early example of early rap music!!! This is regocnized example at: www.youtube.com/watch?v=jfnDEuuPq4Q which builds upon the 1964 song. Amazing. An amazing live performance at: www.youtube.com/watch?v=O3E1uHdrJws, only not using that as the default link as it is not from the official channel. - Vinicius de Moraes. Many of his lyrics are poetry. Notably, he has some "children" songs that you think about as an adult and go "oh fuck". For some reason, Ciro can't help but think that he looks like a pedophile, but he doesn't have any scandals apparently, poor dude. He was a drunkard for sure though.
Video 20. Aquarela by Toquinho (1983)Source. This is a mega childhood hit, and it never gets old. Amazing. One of the most brutal memento moris ever?Video 21. Xô Saudade by Alceu Valença. Source. From the 1980 album "Coração Bobo"Video 22. Carcará by João Do Vale (1981)Source.From the eponymous album.Video 23. Carcará by Maria Bethânia (1981)Source. This very good interpretation likely did much to popularize the song.Video 25. Na Rua, Na Chuva, Na Fazenda by Hyldon (1974)Source. Translation: "On the Street, In the Rain, On the Farm".Video 26. Source. Translation: "All that you could be".Video 27. Caçador De Mim from the eponymous album by Milton Nascimento (1981)Source.
Type of radioactive decay Updated 2025-07-16
Four-terminal sensing Updated 2025-07-16
The best quotes of all time Updated 2025-07-16
Ciro's best quotes selected by no one other than Ciro can be found at: Ciro Santilli's best random thoughts.
Jesus has some nice ones: Section "Quote by Jesus".
Related to technology:
- "Think" by Thomas J. Watson, 1915. The audio is a must: en.wikipedia.org/wiki/File:Think_Thomas_J_Watson_Sr.ogg. The past greatness of IBM at its brightest.
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