Protein tag Updated 2025-07-16
You modify the DNA of a cell and stick a fluorescent protein right before or after another protein. Then when it gets translated, the GFP is stuck to the protein of interest, which hopefully hasn't lost its function as a result, then you can just see the protein of interest.
Quaternary Updated 2025-07-16
Video 1.
Why Relativity Breaks the Schrodinger Equation by Richard Behiel (2023)
. Source. Take a plane wave function, because we know its momentum perfectly. Apply a constant voltage to an electron. You can easily bring it beyond the speed of light at about 255.5 keV.
Transpose of a matrix multiplication Updated 2025-07-16
When it distributes it inverts the order of the matrix multiplication:
Type system Updated 2025-07-16
Vim Updated 2025-07-16
Before we get a decent open source integrated development environment, what else can you do?
But also perfect for small one-off files when you don't have the patience to setup said IDE.
vim's defaults are atrocious for the 21st century! Vundle is reasonable as an ad-hoc package manager, but it can't set fixed versions of packages:
Chess Updated 2025-07-16
Enzyme Updated 2025-07-16
For an initial concrete example, consider e. Coli K-12 MG1655 gene thrA.
Video 1.
How Enzymes Work by RCSBProteinDataBank (2017)
Source. Shows in detail how aconitase catalyses the citrate to isocitrate reaction in the citric acid cycle.
Glycoprotein Updated 2025-07-16
Invertible matrix Updated 2025-07-16
The set of all invertible matrices forms a group: the general linear group with matrix multiplication. Non-invertible matrices don't form a group due to the lack of inverse.
River Cam Updated 2025-07-16
Semiconductor diode Updated 2025-07-16
Figure 1. . Source. This image shows well how the diode is only an approximation of the ideal one way device. Notably, there is this non-ideal voltage drop across the device, which can be modelled as constant. It is however an exponential in fact.
Video 1.
Diodes Explained by The Engineering Mindset (2020)
Source. Good video:
Ciro's Edict #7 / Next steps Updated 2025-07-16
Improve article editing which is very buggy and inconvenient!
I'll also look into some more likely easy but very important topic improvements:
Hertz Updated 2025-07-16
Named after radio pioneer Heinrich Hertz.

There are unlisted articles, also show them or only show them.