{disambiguate=video game}
{c}
{title2=1996}
{wiki}


Quake

{disambiguate=file manager}
{wiki}

<Ciro Santilli> considered it before he stopped using file managers altogether, it is not bad.


Ranger

Signal processing

{c}
{wiki}

Waste of time sub-sites that should instead be merged into <Stack Overflow> as different tags.

Nowhere is this waste more visible than at: https://cs50.stackexchange.com/[]. A website just for some specific course that is completely covered by other sites of the network? What a humongous waste!!!


Stack Exchange

Comedy show

{disambiguate=letter}
{title2=$\Eta$}
{title2=$\eta$}
{title2=H}
{wiki}

= Eta
{synonym}

Lowercase looks like a lowercase <letter N> for some reason.


File format

Hydrogen cyanide

{tag=Siemens spinoff}
{title2=1999}
{wiki}

= Infineon
{c}
{synonym}


Infineon Technologies

A major difficulty of getting such this to work is that may university teachers want to retain closed copyright of their work because they:
* want to publish a book later and get paid. Yes, the root problem is that teachers get paid way too little and have way too little job security for the incredibly important and difficult extremely difficult job they are doing, and we have to <vote> to change that
* are afraid that if amazing material is made freely available, then they would not be needed and lose their jobs.  Once again, job security issue.
* believe that if anyone were allowed to touch their precious content, those people would just "screw it up" and make it worse
* don't even want to publish their notes online because "someone will copy it and take their credit". What a mentality! In order to prevent a theft, you are basically guaranteeing that your work will be completely forgotten!
* don't want students to read the notes and skip class, because spoken word has magic properties and imparts knowledge that cannot otherwise conveyed by a book
* are afraid that mistakes will be found in their material. Reputation is of course everything in academia, since there is no money.

  So it's less risky to have closed, more buggy notes, than open, more correct ones.

  This can be seen clearly for example on <Physics Stack Exchange>, and most notably in <particle physics> (well, which is basically the only subject that really gets asked, since anything more experimental is going to be blocked off by patents/interlab competition), where a large proportion incredibly amazing users have anonymous profiles.

  They prefer to get no reputation gains from their amazing contributions, due to the fear that a single mistake will ruin their career.

  This is in stark contrast for example to <Stack Overflow>, where almost all top users are not anonymous:

  List of top users: https://physics.stackexchange.com/users?tab=Reputation&filter=all and some notable anonymous ones:
  * https://physics.stackexchange.com/users/2451/qmechanic
  * https://physics.stackexchange.com/users/50583/acuriousmind
  * https://physics.stackexchange.com/users/43351/profrob
  * https://physics.stackexchange.com/users/84967/accidentalfouriertransform
  * https://physics.stackexchange.com/users/56997/curiousone
  * https://physics.stackexchange.com/users/139781/probably-someone
  * https://physics.stackexchange.com/users/206691/chiral-anomaly

Therefore the only way is to find teachers who are:
* enlightened to use such licenses
* forced by their organizations to use such licenses
The forced option therefore seems like a more bulk efficient starting point for searches.

No matter how much effort a single person puts into writing perfect tutorials, they will never beat 1000x people + an algorithm.

It is not simply a matter of how much time you have. The fundamental reason is that each person has a different background and different skills. Notably the <there is value in tutorials written by beginners>[young students have radically different understanding than that of the experienced teacher].

Therefore, those that refuse to contribute to such platforms, or at least license their content with open licenses, will inevitably have their work forgotten in favor of those that have contributed to the more open platform, which will eventually dominate everything.

Perhaps <OurBigBook.com> is not he killer platform that will make this happen. Perhaps the world is not yet ready for it. But Ciro believes that this will happen, sooner or later, inevitable, and he wants to give it a shot.

Also worth checking:
* https://jornal.usp.br/universidade/usp-de-sao-carlos-oferece-aulas-de-graduacao-em-matematica-e-estatistica-abertas-ao-publico/ "Open Classroom" program from the <University of São Paulo>. We should Google for "Open Classroom" a bit more actually.
* https://open.ed.ac.uk/about/[]: talk only

\Image[https://web.archive.org/web/20220120132903if_/https://phdcomics.com/comics/archive/phd100610s.gif]
{height=500}
{title=The <postgraduate education>[Grad Student] <Brain> by <PhD Comics> (2010)}
{description=Convincing academics that their tutorial are not always perfect is one of blocking points to the acceptance of solutions such as <OurBigBook.com>. To thrive in the competition of academia, those people are amazing at publishing novel results. Explaining to beginners however, not necessarily so.}
{source=https://phdcomics.com/comics/archive.php?comicid=1379}


How to convince teachers to use CC BY-SA

Regular polyhedron

{c}

\Video[https://www.youtube.com/watch?v=g3SKBwzTtv0]
{title=The World Of Enrico Fermi by <Harvard Project Physics> (1970)}


The World Of Enrico Fermi by Harvard Project Physics (1970)

Webcomic

{c}
{title2=2001}
{wiki}

Was a direct tech predecessor to the <iPhone>.


iPod

{tag=Light source}
{wiki}

The key advantages of lasers over other <light sources> are:
* it emits a very narrow range of frequencies (small linewidth), which for many purposes can be considered a single frequency

  It does however have a small range of frequencies. The smaller the range, the better the laser quality.
* it can be efficient collimated, while still emitting a lot of output power: <Why can't you collimate incoherent light as well as a laser?>{full}
* can be phase and polarization coherent, though it is not always the case? TODO.

\Video[https://www.youtube.com/watch?v=_JOchLyNO_w]
{title=How Lasers Work by Scientized (2017)}
{description=
An extremely good overview of how lasers work. Clearly explains the electron/photon exchange processes involved, notably <spontaneous emission>.

Talks about the importance of the metastable state to achieve <population inversion>.

Also briefly explains the imperfections that lead to the slightly imperfect non punctual spectrum seen in a real laser.

* https://youtu.be/_JOchLyNO_w?t=188 says <LED> is "also monochromatic", but that is not strictly true, it has way way larger frequency band than a laser. Only shorter compared to 
* https://youtu.be/_JOchLyNO_w?t=517 <stimulated emission>. This is the key to laser formation as it produces coherent photons.
* https://youtu.be/_JOchLyNO_w?t=581 <spontaneous emission> happens too fast (100 ns), which is not enough time for <stimulated emission> to happen. <Metastable electrons> to the rescue.
* https://youtu.be/_JOchLyNO_w?t=832 the parallel mirrors select perpendicular photons preferentially
}

Bibliography:
* https://phys.libretexts.org/Courses/University_of_California_Davis/UCD%3A_Physics_9HE_-_Modern_Physics/06%3A_Emission_and_Absorption_of_Photons/6.3%3A_Lasers His <Rate My Professors> is amazing: https://www.ratemyprofessors.com/ShowRatings.jsp?tid=1783467


Laser

Vehicle

YouTube comedy channel

{wiki}

= Assembly
{synonym}

A human readable way to write instructions for an <instruction set architecture>.

One of the topics covered in <Ciro Santilli>'s <Linux Kernel Module Cheat>.


Assembly language

Associative property

* 1968 https://en.wikipedia.org/wiki/Caetano_Veloso_(1968_album)[Caetano Veloso (1968 album)]

  \Video[https://www.youtube.com/watch?v=he_ghOAXbSM]
  {title=Alegria, Alegria by <Caetano Veloso> (1968)}
  {description=Critique of <Military dictatorship in Brazil>.}

* 1972
  * https://en.wikipedia.org/wiki/Transa_(album)[Transa (1972)] album. Literally: "The Fuck", good old seventies.

    \Video[https://www.youtube.com/watch?v=GVVSimWZm0U]
    {title=Triste Bahia by <Caetano Veloso> (1972)}
    {description=Inspired by (or more likely: actually is) <Capoeira music>.}

    \Video[https://www.youtube.com/watch?v=u18HsCm8W7U]
    {title=Mora na Filosofia by <Caetano Veloso> (1972)}

  * https://en.wikipedia.org/wiki/Caetano_e_Chico:_Juntos_e_Ao_Vivo[Caetano e Chico: Juntos e Ao Vivo (1972)] album

    \Video[https://www.youtube.com/watch?v=F4TXkeJYxTE]
    {title=Você Não Entende Nada by <Caetano Veloso> (1970)}
    {description=
    Amazing performance at Coliseu dos Recreios, Lisbon. 1981. https://www.discogs.com/Gal-Costa-Legal-Voc%C3%AA-N%C3%A3o-Entende-Nada/release/5872459[Discogs] says original album is Legal (1970), but https://en.wikipedia.org/wiki/Legal_(Gal_Costa_album)[wiki page] and photos of back disagree...

    This song talks about a man's mixed desires to remain with his partner and also escape to adventure. It contains one of the most amazing <sexual innuendo> ever recorded: the man describes foods that his partner will serve him, and the he endlessly eats and eats and eats:
    \Q[[eu como, eu como, eu como, você [... huge intentional pause ...] não está entendendo quase nada do que eu digo.]]
    translation:
    \Q[[I eat, I eat, I eat, you [... huge intentional pause ...] don't understand anything that I'm saying.]]
    which makes it unclear "you" is part of "I eat you" (to eat (comer) is a slang for <fucking>), or if "you" is part of the next sentence.
    }

    \Video[https://www.youtube.com/watch?v=_p854CGQ8vo]
    {title=Partido Alto by <Caetano Veloso> (1972)}
    {description=<Atheism> song (<Theodicy>)! Lyrics by <Chico Buarque>, but <Ciro Santilli> prefers this interpretation. From the 1972 "Caetano E Chico Juntos E Ao Vivo" joint album with <Chico Buarque>.}
* 1975 https://en.wikipedia.org/wiki/Qualquer_Coisa[Qualquer coisa] album

  \Video[https://www.youtube.com/watch?v=796yP7HX9L0]
  {title=Qualquer Coisa by <Caetano Veloso> (1975)}

  \Video[https://www.youtube.com/watch?v=HbXembjZ-cE]
  {title=Samba e Amor by <Caetano Veloso> (1975)}
  {description=Cover from original song by <Chico Buarque>, original album https://pt.wikipedia.org/wiki/Chico_Buarque_de_Hollanda_-_N%C2%BA4[Chico Buarque de Hollanda - Nº4]. Desperately reminds Ciro of his University day <weekend> nights. Except that there was no Samba. And little Amor. Mostly a silent and wholesome loneliness and <games young Ciro Santilli played>[emulation].}

  \Video[https://www.youtube.com/watch?v=61DddY9OlbE]
  {title=Georde de Capadócia by <Caetano Veloso> (1975)}
  {description=
  Composed by Jorge Ben, but this interpretation is remarkable. https://en.wiktionary.org/wiki/corpo_fechado[corpo fechado] (closed body) style song. This idea is much linked to <Capoeira>/African religion idea. E.g. a more traditional capoeira corpo fechado song: https://www.youtube.com/watch?v=tfd9j6XFmSg[]

  \Video[https://www.youtube.com/watch?v=H3IH0pnwpl4]
  {title=Coricos' prayer scene from https://en.wikipedia.org/wiki/Black_God,_White_Devil[Black God, White Devil] (1964)}
  {description=This shows an Amazing corpo fechado scene from an amazing old black an white <Brazilian> film.}
  }

* 1976 https://en.wikipedia.org/wiki/Doces_B%C3%A1rbaros[Doces Bárbaros (1976)] album

  \Video[https://www.youtube.com/watch?v=1f-hkmGLE1s]
  {title=Um Índio by <Caetano Veloso> (1976)}
  {description=Recording from 1992. Also appeared in the https://en.wikipedia.org/wiki/Bicho_(album)[Bicho (1977)] album.}
* 1977 https://en.wikipedia.org/wiki/Bicho_(album)[Bicho (1977)]

  \Video[https://www.youtube.com/watch?v=4pRGpUkBI0k]
  {title=Tigresa by <Caetano Veloso> (1977)}
  {description=Talks about a strong willed, unapologetic, disenchanted, but also hopeful brown skinned lover: a tigress. Ciro once knew one, but it wasn't meant to be.}

* 1978 album https://en.wikipedia.org/wiki/Muito_(Dentro_da_Estrela_Azulada)[Muito (Dentro da Estrela Azulada)]

  \Video[https://www.youtube.com/watch?v=Nmxp4XQnBpw]
  {title=Sampa by <Caetano Veloso> (1978)}
  {description=
  "Sampa" is an affectionate slang for <São Paulo City>. The song perfectly captures the city, and reminds Ciro so badly of <University of São Paulo>[his University days there].

  \Q[
  \[D\]a força da grana que ergue e destroi coisas belas\br
  The power of money that builds and destroy beautiful things
  ]
  }

  \Video[https://www.youtube.com/watch?v=WyxL_lbo4kM]
  {title=Terra by <Caetano Veloso> (1978)}
  {description=
  "Terra" means <Earth> in <Portuguese (language)>.

  Ciro used to watch a television nature show called "Planeta Terra" in the legendary https://en.wikipedia.org/wiki/TV_Cultura[TV Cultura] with his parents in the couch when he was young, and under a duvet when it was a bit cold. Those days were the best. The narrator's lady voice was particularly soothing, and would easily put you in a kind of sleepy trance, her name is https://pt.wikipedia.org/wiki/Valéria_Grillo[Valéria Grillo]

  TODO what was the original show exactly? Here is a sample: https://www.youtube.com/watch?v=vNwfYEMdrRU Very likely just a translation of some British nature show with a custom <Brazilian> intro and presenter. Credits at end mention English narrator: "Eugene Fraser", and "Thirteen WNET Nature" production, which produced https://en.wikipedia.org/wiki/Nature_(TV_program)[Nature (1982)] that ran since 1982, making that a likely candidate.
  }
* 1980

  \Video[https://www.youtube.com/watch?v=RFEQSvAMYyg]
  {title=Menino do Rio by <Caetano Veloso> (1980)}
  {description=Apparently served as inspiration for the https://pt.wikipedia.org/wiki/Menino_do_Rio[Menino do Rio (1980)] movie, which is silly, but a worthwhile record of the times.}
* 1984 https://pt.wikipedia.org/wiki/Vel%C3%B4[Velô (1984)]

  \Video[https://www.youtube.com/watch?v=4EZtto6qtgs]
  {title=O Quereres by <Caetano Veloso> (1984)}
  {description=
  Notable quote from the chorus that is often in Ciro's mind:
  \Q[Ah, bruta flor, do querer]
  translation:
  \Q[Oh, brute flower of the wanting]
  }


Title	Created	Updated
Quake	1970-01-01	1970-01-01
Ranger	1970-01-01	1970-01-01
Signal processing	1970-01-01	1970-01-01
Stack Exchange	1970-01-01	1970-01-01
Comedy show	1970-01-01	1970-01-01
Eta	1970-01-01	1970-01-01
File format	1970-01-01	1970-01-01
Hydrogen cyanide	1970-01-01	1970-01-01
Infineon Technologies	1970-01-01	1970-01-01
How to convince teachers to use CC BY-SA	1970-01-01	1970-01-01
Regular polyhedron	1970-01-01	1970-01-01
The World Of Enrico Fermi by Harvard Project Physics (1970)	1970-01-01	1970-01-01
Webcomic	1970-01-01	1970-01-01
iPod	1970-01-01	1970-01-01
Laser	1970-01-01	1970-01-01
Vehicle	1970-01-01	1970-01-01
YouTube comedy channel	1970-01-01	1970-01-01
Assembly language	1970-01-01	1970-01-01
Associative property	1970-01-01	1970-01-01
The best Caetano Veloso songs	1970-01-01	1970-01-01

Ciro Santilli (@cirosantilli, 32)