Viewing posts by christian
Animated landscapes with Matplotib
Posted by: christian on 20 Dec 2020
Just a quick experiment in creating animated surfaces in Matplotlib. The distortions to the plane are sine waves applied in octaves with a random phase, $\phi_n$:
Animated contour plots with Matplotlib
Posted by: christian in Featured on frontpage on 12 Dec 2020
A quick project inspired by this tweet by @story645 referencing Jacques Bertin's Semiology of Graphics.
Python Quiz Advent Calendar: explanations
Posted by: christian on 2 Dec 2020
Here are the explanations for the Python Quiz Advent Calender puzzles which appear over December 2020.
Uranium enrichment and the separative work unit (SWU)
Posted by: christian in Featured on frontpage on 30 Nov 2020
Natural uranium consists largely of two isotopes, $\mathrm{^{235}U}$ and $\mathrm{^{238}U}$. The less-abundant (0.72%) isotope, $\mathrm{^{235}U}$ , is important for nuclear reactors and weapons because it is the only isotope existing in nature to any appreciable extent that can sustain a fission chain reaction (that is, it is fissile).
Surface-to-volume ratios of some solid shapes
Posted by: christian on 27 Nov 2020
The shape with the minimum surface-to-volume ratio is the sphere. The code below plots this ratio for a variety of shapes as a function of a characteristic length: