Re: Self description
Reading the court order it seems that he was prosecuted fir describing himself as an engineer. If he had written exactly the same email with the same work but described himself as a mathematician there would be no case.
No, he was also being fined for doing the maths without a licence. The Order confirming the fine says things like:
"Jarlstrom applied special knowledge of the mathematical, physical and engineering sciences to such creative work as investigation, evaluation, and design in connection with public equipment, processes, and works. Jarlstrom thereby engaged in the practice of engineering under ORS 672.005(1)(b). By doing so through the use of algorithms for the operation of traffic control systems, and through the use of the science of analysis, review, and application of traffic data systems to advise members of the public on the treatment of the functional characteristics of traffic signal timing, Jarlstrom engaged, specifically, in traffic engineering under OAR 820-040-0030(1 )(b) and (2)."