Regular polyhedron

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

= Eta
{synonym}

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


{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)

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

= Infineon
{c}
{synonym}


Infineon Technologies

Hydrogen cyanide

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

Webcomic

YouTube comedy channel

Vehicle

{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

{c}
{title2=2001}
{wiki}

Was a direct tech predecessor to the <iPhone>.


iPod

Associative property

Computer biliography

Wiki by subject

LLM generated wiki

Orthogonal group

{c}

= VS Code
{c}
{synonym}
{title2}

= vscode
{c}
{synonym}
{title2}


Visual Studio Code

Computer algebra system

{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

{c}
{tag=Very good film}
{wiki=Moon_(2009_film)}


Title	Created	Updated
Regular polyhedron	1970-01-01	1970-01-01
Eta	1970-01-01	1970-01-01
The World Of Enrico Fermi by Harvard Project Physics (1970)	1970-01-01	1970-01-01
Infineon Technologies	1970-01-01	1970-01-01
Hydrogen cyanide	1970-01-01	1970-01-01
How to convince teachers to use CC BY-SA	1970-01-01	1970-01-01
Webcomic	1970-01-01	1970-01-01
YouTube comedy channel	1970-01-01	1970-01-01
Vehicle	1970-01-01	1970-01-01
Laser	1970-01-01	1970-01-01
iPod	1970-01-01	1970-01-01
Associative property	1970-01-01	1970-01-01
Computer biliography	1970-01-01	1970-01-01
Wiki by subject	1970-01-01	1970-01-01
LLM generated wiki	1970-01-01	1970-01-01
Orthogonal group	1970-01-01	1970-01-01
Visual Studio Code	1970-01-01	1970-01-01
Computer algebra system	1970-01-01	1970-01-01
Assembly language	1970-01-01	1970-01-01
Moon (2009)	1970-01-01	1970-01-01

Ciro Santilli (@cirosantilli, 32)