Vitold Belevitch

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Vitold Belevitch (born March 2, 1921 in Terijoki , Finland, † December 26, 1999 ) was a Belgian mathematician and electrical engineer. He is considered the grandfather of circuit theory in Europe. He was the first to use the so-called conference matrix to theoretically describe the technical problems involved in interconnecting several participants in early telephone networks with as little loss as possible during conference calls . Related to this is Belevitch's theorem , which describes a certain type of two-port .

Life

He was born while his parents were fleeing the Bolshevik Revolution from Petrograd to Helsinki , where his grandfather was headmaster. While escaping, his Russian father was arrested and deported to Siberia. After his Polish mother received no more news, she emigrated to Belgium with Vitold in 1926.

He attended the Facultés universitaires Notre-Dame de la Paix until 1936 and then studied electrical engineering and mechanical engineering at the Université catholique de Louvain until 1942 . In 1945 he wrote his dissertation Insertion Loss and Effective Phase-Shift in Composite Filters at Cut-Off Frequency with Wilhelm Cauer and Charles Manneback .

In 1942 he started at Bell Telephone Manufacturing Company (BTMC) in Antwerp, which was sold to ITT in 1925. He headed the transmission department and worked with Cauer, who at the time worked for the ITT subsidiary Mix & Genest. Alfred Fettweis became one of his employees . In 1951 he was involved in the design of electronic computers, where they constructed the IRSIA-FNRS.

From 1953 to 1985 he taught at the university. In 1955 he became director of the Comité d'Étude et d'Exploitation des Calculateurs Électroniques in Brussels. In 1963 he became head of the Laboratoire de Recherche (MBLE) (later Philips Research Laboratories Belgium ).

Publications

  • Theory of 2n-terminal networks with application to conference telephony , Electrical Communication, vol.27, no.3, p.240, September 1950.
  • Langage des machines et langage humain ; 1956
  • Théorie des circuits de télécommunication ; 1957
  • with Jacques Neirynck: Rectification and frequency multiplication by rectifie rcircuits with selective termination ; Ann. Soc. Scient. Bruxelles, 1957
  • Théorie des circuits non-linéaires en régime alternatif (redresseurs, modulateurs, oscillateurs). ; 1959
  • Classical network theory ; 1963
  • Factorization of scattering matrices with applications to passive network synthesis ; 1963
  • Summary of the History of Circuit Theory ; Comité d'Etude des Calculateurs Electroniques, Proceedings of the IRE, 1962
  • Conference Matrices and Hadamard Matrices ; In: Ann. de la Société scientifique de Bruxelles 82, 13-32, 1968.
  • On Stieltjes integral transforms involving [Gamma] functions ; 1982

literature

  • "Les activités de Vitold Belevitch en théorie des circuits", allocution d'hommage à l'occasion du départ de Mr. Belevitch (The activities of Vitold Belevitch in circuit theory, address delivered in homage of Mr. Belevitch at the occasion of his departure ), MBLE-Philips, Brussels, Belgium, November 23, 1984.

Belevitch Award

Web links

Individual evidence

  1. ↑ http://tcts.fpms.ac.be/cours/1005-01/belevitch.html
  2. ↑ ftp://ftp.esat.kuleuven.be/pub/sista/ida/reports/00-150.pdf
  3. ^ Vitold Belevitch: Theorem of 2 n -terminal networks with application to conference telephony. in Electrical Communication , 1950, Volume 26, pages 231 to 244
  4. ↑ http://www.genealogy.math.ndsu.nodak.edu/id.php?id=107608
  5. ↑ http://www.ieeeghn.org/wiki/index.php/Oral-History:Alfred_Fettweis
  6. ↑ http://gso.gbv.de/DB=2.1/PPNSET?PPN=221014217
  7. ↑ Archived copy ( memento of the original dated June 6, 2011 in the Internet Archive ) Info: The archive link was inserted automatically and has not yet been checked. Please check the original and archive link according to the instructions and then remove this notice. @1@ 2Template: Webachiv / IABot / www.awk.nrw.de
  8. ↑ http://www.ece.cmu.edu/directory/details/202 , http://www.ece.cmu.edu/~chraska/rohrer_bib.html
  9. ↑ Archived copy ( Memento of the original from March 3, 2006 in the Internet Archive ) Info: The archive link was inserted automatically and has not yet been checked. Please check the original and archive link according to the instructions and then remove this notice. @1@ 2Template: Webachiv / IABot / cas.et.tudelft.nl
personal data
SURNAME Belevitch, Vitold
BRIEF DESCRIPTION Belgian mathematician and electrical engineer
DATE OF BIRTH March 2, 1921
PLACE OF BIRTH Terijoki , Finland
DATE OF DEATH December 26, 1999