Ciro Santilli @cirosantilli 40 

YouTube poop Updated 2025-07-16

www.youtube.com/channel/UCDyR_C_QVjZR24ze0fl5S_Q Goat-on-a-Stick channel

Kazoo Kid - Trap Remix by Mike Diva (2016)

Source.

Video 2.

Ravioli Remix: Black and Yellow by Wiz Krablifa by TheDoubleAgent (2015)

Source.

Video 3.

Afraid of Technology by adarkenedroom (2008)

Source. TODO source show, appears "Brass Eye", TODO episode www.reddit.com/r/videos/comments/jpyfi/technology_scares_the_crap_out_of_me/

How to cite a book on Wikipedia Updated 2025-07-16

To avoid duplication when citing multiple pages: Section "How to use a single source multiple times in a Wikipedia article?"

A good big sample definition:

<ref name="googleStory">{{cite book |last1=Vise |first1=David |author-link1=David A. Vise |last2=Malseed |first2=Mark |author-link2=Mark Malseed |title=The Google Story |date=2008 |publisher=Delacorte Press |url=https://archive.org/details/isbn_9780385342728}}</ref>

There is also title-link to link to a wiki page. But it is incompatible with url= for Internet Archive Open Library links which is a shame.

Microelectromechanical systems Updated 2025-07-16

MEMS: The Second Silicon Revolution? by Asianometry (2022)

Source.

Scientific American Updated 2025-07-16

Ytterbium Updated 2025-07-16

Not "Yt" because that is already "Yttrium". God.

Zakir Hussain (musician) Updated 2025-07-16

Zatoichi effect Updated 2025-07-16

This is a neologism by Ciro Santilli, it refers to the fact that Zatoichi was not fully blind, but extremely hard of sight, which makes him:

too capable for the blind people, who did not trust him
too incapable for non-blind people, who despised him

and metaphorically refers to similar situations where a person or group of people are in the middle of two groups and not part of either of them.

A related thing that comes to mind is Aum Shinrikyo's Prophet Shoko Asahara, who was semi blind, and would bully the fully blind people of his school for blind people.

How to hardcode subtitle into a video with FFmpeg? Updated 2025-07-16

On Ubuntu 20.10, just:

ffmpeg -i input.mp4 -vf "subtitles=subtitle.srt" output.mp4

To change font size: stackoverflow.com/questions/21363334/how-to-add-font-size-in-subtitles-in-ffmpeg-video-filter

ffmpeg -i input.mp4 -vf "subtitles=subtitle.srt:force_style='Fontsize=64'" output.mp4

The default appears to be 24, so just multiply that by whatever seems like a reasonable factor.

Note howver that .ass subtitle files can contain style information, which ffmpeg respects. Aegisub can produce and preview such styles, making .ass one of the best options.

Physicist Updated 2025-07-16

Figure 1.
xkcd 435: Fields arranged by purity
. Source.

Shelter Island Conference Updated 2025-07-16

Sponsored by National Academy of Sciences, located in Long Island.

Some photos at: www.nasonline.org/about-nas/history/archives/milestones-in-NAS-history/shelter-island-conference-photos.html on the website of National Academy of Sciences, therefore canon.

This is where Isidor Rabi exposed experiments carried out on the anomalous magnetic dipole moment and Willis Lamb presented his work on the Lamb shift.

It was a very private and intimate conference, that gathered the best physicists of the area, one is reminded of the style of the Solvay Conference.

QED and the men who made it: Dyson, Feynman, Schwinger, and Tomonaga by Silvan Schweber (1994) chapter 4.1 this conference was soon compared to the First Solvay Conference (1911), which set in motion the development of non-relativistic quantum mechanics.

Beta decay Updated 2025-07-16

Uranium emits them, you can see their mass to charge ratio under magnetic field and so deduce that they are electrons.

Caused by weak interaction TODO why/how.

The emitted electron kinetic energy is random from zero to a maximum value. The rest goes into a neutrino. This is how the neutrino was first discovered/observed indirectly. This is well illustrated in a decay scheme such as Figure "caesium-137 decay scheme".

better-sqlite3 Node.js package Updated 2025-07-16

As claimed on their README, their operation truly appears to be 10x faster than the node-sqlite package!! It is insane!! How can that other package still exist at all?

The only big problem was the lack of ORM, but people are looking into that by adding it to Sequelize:

Zeeman effect Updated 2025-07-16

Split in the spectral line when a magnetic field is applied.

Non-anomalous: number of splits matches predictions of the Schrödinger equation about the number of possible states with a given angular momentum. TODO does it make numerical predictions?

Anomalous: evidence of spin.

www.pas.rochester.edu/~blackman/ast104/zeeman-split.html contains the hello world that everyone should know: 2p splits into 3 energy levels, so you see 3 spectral lines from 1s to 2p rather than just one.

p splits into 3, d into 5, f into 7 and so on, i.e. one for each possible azimuthal quantum number.

It also mentions that polarization effects become visible from this: each line is polarized in a different way. TODO more details as in an experiment to observe this.

Well explained at: Video "Quantum Mechanics 7a - Angular Momentum I by ViaScience (2013)".

Experimental physics - IV: 22 - Zeeman effect by Lehrportal Uni Gottingen (2020)

Source.

This one is decent. Uses a cadmium lamp and an etalon on an optical table. They see a more or less clear 3-split in a circular interference pattern,

They filter out all but the transition of interest.

youtu.be/ZmObNFAqkBE?t=165 passes the lines through a polarizer, which shows how orbital angular momentum is carried by photon polarization
youtu.be/ZmObNFAqkBE?t=370 says they are looking at 1D2 to 1P1 changes.

Video 2.

Zeeman Effect - Control light with magnetic fields by Applied Science (2018)

Source. Does not appear to achieve a crystal clear split unfortunately.

Zeitschrift für Physik Updated 2025-07-16

Belongs to Springer, so you can still find papers under paywalls on their website.

Notable papers:

quantum mechanical re-interpretation of kinematic and mechanical relations by Heisenberg (1925) on volume 33

Google Quantum AI Updated 2025-07-16

Google's quantum hardware/software effort.

The "AI" part is just prerequisite buzzword of the AI boom era for any project and completely bullshit.

According to job postings such as: archive.ph/wip/Fdgsv their center is in Goleta, California, near Santa Barbara. Though Google tends to promote it more as Santa Barbara, see e.g. Daniel's t-shirt at Video "Building a quantum computer with superconducting qubits by Daniel Sank (2019)".

Control of transmon qubits using a cryogenic CMOS integrated circuit (QuantumCasts) by Google (2020)

Source. Fantastic video, good photos of the Google Quantum AI setup!

Zettelkasten Updated 2025-07-16

zettelkasten.de/posts/overview/ mentions one page to rule them all:

How many Zettelkästen should I have? The answer is, most likely, only one for the duration of your life. But there are exceptions to this rule.

Zhang Ziqian Updated 2025-07-16

Euler number Updated 2025-07-16

Go (game) Updated 2025-07-16