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The Cistercian numeral counting system used by the Cistercian monastic order in the late medieval period. The digits 1 – 9 are depicted as symbols arranged around a vertical stave. By placing these symbols reflected vertically and/or horizontally into each of four locations the decimal digits in the units, tens, hundreds and thousands positions could be represented, enabling the numbers 0 – 9999 to be defined, as shown below (by user Meteoorkip from Wikipedia, CC BY-SA 4.0):

Just a quick demonstration of using Matplotlib and Pillow to customize a chart in the style of a 1950s academic journal article.

This previous post introduced a simple molecular dynamics simulation for the equilibration of the speeds of the particles of an ideal gas. The present post extends the code a little to model the effusion of an ideal gas through a small hole into a vacuum.

This is an update to the post from February 2016 with an improved algorithm (given below) for generating pleasing random images by sequentially shifting the colour of pixels across a canvas.

Just a quick update on this blog post on visualizing the electric field of a multipole arrangement of electric charges to visualize the electric field of a capacitor (two oppositely-charged plates, separated by a distance $d$). The code, which uses Matplotlib's `streamplot`

function to visualize the electric field from the plates, modelled as rows of discrete point charges, is below.