Google Quantum Campus by Ciro Santilli 37 Created 2024-12-13 Updated 2025-07-16
Built 2021. TODO address. Located in Santa Barbara, which has long been the epycenter of Google's AI efforts. Apparently contains fabrication facilities.
Video 1.
Take a tour of Google's Quantum AI Lab by Google Quantum AI
. Source. 2023
Nanovoltmeter by Ciro Santilli 37 Created 2024-12-13 Updated 2025-07-16
POSIX environment variable by Ciro Santilli 37 Created 2024-12-13 Updated 2025-07-16
This section is about POSIX environment variable that have special effects.
The Materials Project by Ciro Santilli 37 Created 2024-12-13 Updated 2025-07-16
Signup required for any search, bastards. But it's free. Once you have a URL however it is visible without login, so you could just Google it too.
Gravimeter by Ciro Santilli 37 Created 2024-12-13 Updated 2025-07-16
Comparison of quantum computing hardware by Ciro Santilli 37 Created 2024-12-13 Updated 2025-07-16
SystemAnnouncement dateTypeQubitsAverage connectivityCoherence timeMeasurements per secondSingle qubit errorCZ error
Willow2024-12superconducting105[ref]3.47[ref]68 μs[ref]63 k[ref]0.035%[ref]0.33%[ref]
Ampère's force law by Ciro Santilli 37 Created 2024-12-13 Updated 2025-07-16
Force between two wires carrying an electric current.
Caused by the Lorentz force.
Gravimetry by Ciro Santilli 37 Created 2024-12-13 Updated 2025-07-16
number (bsdgames) by Ciro Santilli 37 Created 2024-12-13 Updated 2025-07-16
For example:
number 123456789123456789123456879123456789123456789123456879
gives:
one hundred twenty-three sexdecillion.
four hundred fifty-six quindecillion.
seven hundred eighty-nine quattuordecillion.
one hundred twenty-three tredecillion.
four hundred fifty-six duodecillion.
seven hundred eighty-nine undecillion.
one hundred twenty-three decillion.
four hundred fifty-six nonillion.
eight hundred seventy-nine octillion.
one hundred twenty-three septillion.
four hundred fifty-six sextillion.
seven hundred eighty-nine quintillion.
one hundred twenty-three quadrillion.
four hundred fifty-six trillion.
seven hundred eighty-nine billion.
one hundred twenty-three million.
four hundred fifty-six thousand.
eight hundred seventy-nine.
It also takes input from stdin, e.g.:
primes 1 10 | number
gives:
two.
...
three.
...
five.
...
seven.
Stack Exchange Data Explorer by Ciro Santilli 37 Created 2024-12-13 Updated 2025-07-16
Allows you to use SQL (T-SQL because the site is coded in Microsoft) to query the public database. It is quite cool.
Electrical conductance by Ciro Santilli 37 Created 2024-12-13 Updated 2025-07-16
bsdgames game by Ciro Santilli 37 Created 2024-12-13 Updated 2025-07-16
Build bsdgames from source by Ciro Santilli 37 Created 2024-12-13 Updated 2025-07-16
Many of the games are disabled by default on Ubuntu. But we can enable some games and build from source with:
apt-get source bsdgames
cd bsdgames-*
sed -ri '/^bsd_games_cfg_no_build_dirs=/s/ number / /' config.params
./configure
make -j
Here we enabled the game number, so now we can:
number/number 123
which gives:
one hundred twenty-three.
We can also "install" it locally with:
make install
which puts the games locally under:
debian/bsdgames/usr/games/number
which you can add to your PATH environment variable.
Tested on Ubuntu 24.04, bsdgames 2.17.

Pinned article: Introduction to the OurBigBook Project

Welcome to the OurBigBook Project! Our goal is to create the perfect publishing platform for STEM subjects, and get university-level students to write the best free STEM tutorials ever.
Everyone is welcome to create an account and play with the site: ourbigbook.com/go/register. We belive that students themselves can write amazing tutorials, but teachers are welcome too. You can write about anything you want, it doesn't have to be STEM or even educational. Silly test content is very welcome and you won't be penalized in any way. Just keep it legal!
We have two killer features:
  1. topics: topics group articles by different users with the same title, e.g. here is the topic for the "Fundamental Theorem of Calculus" ourbigbook.com/go/topic/fundamental-theorem-of-calculus
    Articles of different users are sorted by upvote within each article page. This feature is a bit like:
    • a Wikipedia where each user can have their own version of each article
    • a Q&A website like Stack Overflow, where multiple people can give their views on a given topic, and the best ones are sorted by upvote. Except you don't need to wait for someone to ask first, and any topic goes, no matter how narrow or broad
    This feature makes it possible for readers to find better explanations of any topic created by other writers. And it allows writers to create an explanation in a place that readers might actually find it.
    Figure 1.
    Screenshot of the "Derivative" topic page
    . View it live at: ourbigbook.com/go/topic/derivative
  2. local editing: you can store all your personal knowledge base content locally in a plaintext markup format that can be edited locally and published either:
    This way you can be sure that even if OurBigBook.com were to go down one day (which we have no plans to do as it is quite cheap to host!), your content will still be perfectly readable as a static site.
    Figure 5. . You can also edit articles on the Web editor without installing anything locally.
    Video 3.
    Edit locally and publish demo
    . Source. This shows editing OurBigBook Markup and publishing it using the Visual Studio Code extension.
  3. https://raw.githubusercontent.com/ourbigbook/ourbigbook-media/master/feature/x/hilbert-space-arrow.png
  4. Infinitely deep tables of contents:
    Figure 6.
    Dynamic article tree with infinitely deep table of contents
    .
    Descendant pages can also show up as toplevel e.g.: ourbigbook.com/cirosantilli/chordate-subclade
All our software is open source and hosted at: github.com/ourbigbook/ourbigbook
Further documentation can be found at: docs.ourbigbook.com
Feel free to reach our to us for any help or suggestions: docs.ourbigbook.com/#contact