Suona by Ciro Santilli 37 Updated 2025-07-16
One of the most flashy chinese musical instrument!
It is very similar to the Indian shehnai.
Video 1.
Wang Jin beats Gao Qiu theme music from The Water Margin
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Caesium-137 by Ciro Santilli 37 Updated 2025-07-16
Highly radioactive isotope of caesium with half-life of 30.17 y. Produced from the nuclear fission of uranium, TODO exact reaction, not found in nature.
The fucked thing about this byproduct is that it is in the same chemical family as sodium, and therefore forms a salt that looks like regular table salt, and dissolves in water and therefore easily enters your body and sticks to things.
Another problem is that its half-life is long enough that it doesn't lose radioactivity very quickly compared to the life of a human person, although it is short enough to make it highly toxic, making it a terrible pollutant when released.
This is why for example in the goiânia accident a girl ended up ingesting Caesium-137 after eating an egg after touching the Caesium with her hands.
Injective function by Ciro Santilli 37 Updated 2025-07-16
Mnemonic: in means into. So we are going into a codomain that is large enough so that we can have a different image for every input.
White paper by Ciro Santilli 37 Updated 2025-07-16
White papers are a form of advertisement. They are not peer reviewed papers and are generally not reproducible; their value lies entirely in trust of their publisher rather than being able to verify their claims.
X-ray diffraction by Ciro Santilli 37 Updated 2025-07-16
Often used as a synonym for X-ray crystallography, or to refer more specifically to the diffraction part of the experiment (exluding therefore sample preparation and data processing).

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