Multidimensional Fourier transform Updated 2025-07-16
Lecture notes:
Video 1.
How the 2D FFT works by Mike X Cohen (2017)
Source. Animations showing how the 2D Fourier transform looks like for simple inpuf functions.
QEMU Updated 2025-07-16
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.
Nonprofit impact measurement Updated 2025-07-16
It is harder to measure the impact of nonprofits than of for-profits, since you can't just look at their bank balances.
This is one fundamental difficulty of nonprofit work, how to prove that you deserve the investments and not someone else.
You just map the value (1, 1) to the value 1 of , and it works out. E.g. for , the group generated by of (1, 1) is:
0 = (0, 0)
1 = (1, 1)
2 = (0, 2)
3 = (1, 0)
4 = (0, 1)
5 = (1, 2)
6 = (0, 0) = 0
Afghanistan Updated 2025-07-16
Justine Musk Updated 2025-07-16
Nota bene Updated 2025-07-16
Protease Updated 2025-07-16
X Æ A-12 Updated 2025-07-16
Zephyr (operating system) Updated 2025-08-08
Zephyr is cool. Its installation setup is annoying. But the project is cool.
Ethnic minorities in China Updated 2025-07-16
As of 2020 (TODO starting when) the Chinese government officially recognizes 55 minorities.
These minorities actually had different legal statuses, e.g. they were exempt from the One Child Policy.

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