Videos should be found/made for all of those: videos of all key physics experiments

The leading open source cross architecture and KVM emulator of the 2010's.

Great way to understand how operating systems work, which Ciro Santilli used extensively in his Linux Kernel Module Cheat.

Ciro Santilli has some good related articles listed under: Section "The best articles by Ciro Santilli".

The key thing in a good system of units is to define units in a way that depends only on physical properties of nature.

Ideally (or basically necessarily?) the starting point generally has to be discrete phenomena, e.g.

What we don't want is to have macroscopic measurement artifacts, (or even worse, the size of body parts! Inset dick joke) as you can always make a bar slightly more or less wide. And even metals evaporate over time! Though the mad people of the Avogadro project still attempted otherwise well into the 2010s!

Standards of measure that don't depend on artifacts are known as intrinsic standards.

User mode emulation refers to the ability of certain emulators to emulate userland code running on top of a specific operating system, usually Linux.

For example, QEMU allows you to run a variety of userland ELF programs directly on it, without an underlying Linux kernel running.

User mode emulation is achieved by implementing system calls and special filesystems such as /dev manually on the emulator one by one.

The general tradeoff is that simulation is less acurate as it may lack certain highly advanced kernel functionality you haven't implemented yet. But it is much easier to run executables with it, and you don't have to wait for boot to finish before running, you just run executables directly from the command line.

This is especially interesting for user mode emulation.

Stopped 2019 apparently. Shame. We need something to be upstreamed!

Uses the frequency of the hyperfine structure of caesium-133 ground state, i.e spin up vs spin down of its valence electron $6s^1$, to define the second.

International System of Units definition of the second since 1967, because this is what atomic clocks use.

TODO why does this have more energy than the hyperfine split of the hydrogen line given that it is further from the nucleus?

Why caesium hyperfine structure is used:

Interestingly, the very first programming language with an actual implementation was interpreted: Short Code in 1950.

This is not surprising, as interpreters are easier to write than compilers.

And just like modern scripting languages, it reduced execution speed by about 50x.

A series of systems usually derived from the International System of Units that are more convenient for certain applications.

Notable mentions:

Other notable people that are likely also awesome but Ciro has less familiarity with their contributions:

Co-founder of PowerDNS, an open source dNS implementation.

Homepage: berthub.eu/ says:.
All stuff Ciro cares about too! Cool dude! In particular Ciro loved his quote of I should have loved biology.

He's writing a fun-sounding book about molecular biology as of 2022: berthub.eu/dna-book. Appears to be closed source though. Ciro wonders if he really needs to sell the book for money after all those years though, rather than just publishing it online for free.

Looking at Bert just brings the Dutch Golden Age, and more in particular Antonie van Leeuwenhoek to mind. Epic.

His standard C header seems to be as per example: www.sqlite.org/src/file/ext/misc/rot13.c

** The author disclaims copyright to this source code.  In place of
** a legal notice, here is a blessing:
**
**    May you do good and not evil.
**    May you find forgiveness for yourself and forgive others.
**    May you share freely, never taking more than you give.

Homepage: eli.thegreenplace.net/

Amazing systems programming tutorials. Whenever you Google a hard topic, his blog comes up.

Also has many great contributions on Stack Overflow: stackoverflow.com/users/8206/eli-bendersky

As of 2016, Eli worked at Google (reference). TODO before that, I had found his earlier info previously but lost it.

Eli focuses mostly on compiler toolchains.

He also has some mathematics stuff, so cute: eli.thegreenplace.net/2015/change-of-basis-in-linear-algebra/