Otto Walter Heinrich Oscar Brune (10 January 1901 – 1982) undertook some key investigations into network synthesis at the Massachusetts Institute of Technology (MIT) where he graduated in 1929.
[1] His doctoral thesis was supervised by Wilhelm Cauer and Ernst Guillemin, who the latter ascribed to Brune the laying of "the mathematical foundation for modern realization theory".
[3] In 1926 Brune moved to the US to attend the Massachusetts Institute of Technology (MIT) under the sponsorship of the General Electric Company, receiving Batchelor and Master's degrees in 1929.
[4] From 1929 to 1930, Brune was involved in artificial lightning tests on the power transmission line from Croton Dam, Michigan as a research assistant at MIT.
[8] In 1933, Brune was working on his doctoral thesis entitled, Synthesis of Passive Networks and Cauer suggested that he provide a proof of the necessary and sufficient conditions for the realisability of multi-port impedances.