Building a simple oscillator based Ising machine for research and education

Pretty cool, but tbh per the author/equipment list this paper is basically an advertisement.

There are many types of ring oscillators with quite different characteristics, such as temperature stability and resistance to interference.<p>I was hoping this would be a development board with multiple types of oscillators but this doesn&#x27;t seem to be the case?

A water machine is solving the water equation in real time?