The principle of the system is explained in section 4 in the website. You can run the JavaScript program to obtain the mass of the electron (actually proton/electron mass ratio) from pure random numbers. Click “execute code” and wait one minute, see all the curves converge on the area of the red circle. Click on it to see the value of .00054 .. The mass of the electron (approx.) which is in AU. You can increase kj for more accuracy but will take longer to execute. You can modify the program and use any number for d0 and d1 as long as they are below 1800.