Spintronics Updated 2025-07-16
Video 1.
Introduction to Spintronics by Aurélien Manchon (2020)
Source.
S&P 500 Updated 2025-07-16
Second Updated 2025-07-16
Non-linearity is needed otherwise the input energy would just make the state go to higher and higher energy levels, e.g. from 1 to 2. But we only want to use levels 0 and 1.
The way this is modelled in by starting from a pure LC circuit, which is an harmonic oscillator, see also quantum LC circuit, and then replacing the linear inductor with a SQUID device, e.g. mentioned at: youtu.be/eZJjQGu85Ps?t=1655 Video "Superconducting Qubits I Part 1 by Zlatko Minev (2020)".
SVG 1.0 Updated 2025-07-16
SVG fonts Updated 2025-07-16
The major problem with SVG is text computer fonts. If you make an image with text that depends on one computer font and it is not present in the viewer's machine, it will use some other font, which may overlap with other elements of the image. Some libraries Matplotlib solve this by writing characters as curves, but this produces large files and unsearchable text. The inability of different computer platforms to standardize fonts that must always be present is a major issue.
Translated cycler Turing machine Updated 2025-07-16
Like a cycler, but the cycle starts at an offset.
To see infinity, we check that if the machine only goes left N squares until reaching the repetition, then repetition must only be N squares long.
Ribosome large subunit Updated 2025-07-16
Both eukaryotic and prokaryotic ribosomes have a large and a small subunit.
Ribosome small subunit Updated 2025-07-16
The small one in comparison to the ribosome large subunit.

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