#Onyshkevych wrote this entry for the 1993 “Encyclopedia of Ukraine” about a little-known (mostly) 19th-century Galician physicist who, apparently, discovered X-rays before Roentgen but failed to publish, and also wrote extensively on “the Ukrainian question”. From this we can perhaps infer that Onyshkevych is Ukrainian, and perhaps his family fled to the US due to the Holodomor.
on 02017-05-30US patent 4,201,965 from 1978 by Lubomyr #Onyshkevych, who did his master’s thesis in 1957 on #magnetic-logic and apparently then went to go work at RCA. It’s about building inductors into PCB #hardware. #patents
on 02017-05-30#PDF of Lubomyr S. #Onyshkevych’s 1957 “Analysis of Circuits with Multiple-Hole Magnetic Cores”, MIT tech report 329, a 70-page master’s thesis #paper on multiple-hole #magnetic-logic #hardware, aka “transfluxors”, which Onyshkevych credits to Jan A. Rajchman at RCA Labs. “Diodeless operation of a transfluxor circuit was found to be possible, but slow, unreliable, and critical.” Very poorly scanned photos. Mentions that square-loop ferrite (remanent flux/saturation flux ∈ [0.9, 0.95]) is usually MgMn ferrite (which I think is magnesium-manganese oxide). A one-core full-adder with five holes is shown on p.32 (the 38th of 70 pages); the next page has a three-hole “magnetic SPDT switch”. A “very short rise time” for a current pulse is glossed as “<0.1 μsec”. None of the references are in Russian or Ukrainian. #toread #history
on 02017-05-30