The most practical/precise volt standard.
The wiki page en.wikipedia.org/wiki/Josephson_voltage_standard contains amazing schematics of the device, apparently made by the US Government.
Figure 1.
Schematic of a typical Josephson voltage standard chip
. Source.
Figure 2.
Sam Benz demonstrating the equipment required the voltage standard
. Source.
Video 1.
The evolution of voltage metrology to the latest generation of JVSs by Alain Rüfenacht
. Source. Talk given in 2023. The speaker is from NIST, and the talk was hosted by the BIPM. Fantastic talk.
Video 2.
Technical aspects of realizing the DC volt in the laboratory with a JVS by Stéphane Solve
. Source. Talk given in 2023. The speaker is from BIPM, and the talk was hosted by the BIPM. Fantastic talk.
D and L amino acids by Ciro Santilli 37 Updated 2025-07-16
Usually noted D-something, L-something, e.g. L-alanine, D-glutamine.
Age of Empires II by Ciro Santilli 37 Updated 2025-07-16
Video 1.
Parsa's Age of Empires II Cartoons (2021)
Source. The cutest fan art ever!
This means that e.g. if you do an UPDATE query on multiple rows, and power goes out half way, either all update, or none update.
This is different from isolation, which considers instead what can or cannot happen when multiple queries are running in parallel.
Amazing talk by Richard Feynman that describes his experiences at Los Alamos National Laboratory while developing the first nuclear weapons.
Video 1.
Los Alamos From Below by Richard Feynman (1975)
Source.

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