Editing T. O. Engset

{{Short description|Norwegian mathematician and engineer (1865–1943)}}
[[Image:NOR-Engset-photo-OB-F05845b.jpg|thumb|Engset in 1935.]] 
'''Tore Olaus Engset'''  (May 8, 1865  &ndash; October, 1943 in [[Oslo]]) was a [[Norway|Norwegian]] mathematician and engineer who did pioneering work in the field of [[queueing theory|telephone traffic queuing theory]].<ref>{{Cite news |last=Arne Myskja |year=1998 |title=The man behind the formula: Biographical notes on Tore Olaus Engset |publisher=Telektronikk, 94(2):154-164 |quote=Tore Olaus Engset is known in the teletraffic community for the formula that carries his name.}}</ref>
[[Image:NOR-Carneles-farm-Stranda.png|thumb|The farm at Engset in [[Stranda Municipality]], where T. O. Engset grew up]]
[[Image:NOR-Engset-and-his-wife.png|thumb|T. O. Engset and his wife Marie Amalie (1856–1927).]]

Tore Olaus Engset was born in [[Stranda Municipality]] in [[Møre og Romsdal]], Norway. After he graduated school at the age of 18, Engset was admitted to the telegraph school in [[Stavanger (city)|Stavanger]] in 1883. He received his certificate in a year and took employment. In his spare time he continued his studies, graduating in 1892 but continuing his university studies. Engset received an [[M.Sc.]] in physics and mathematics in 1894 at [[University of Oslo]], after which he worked at [[Televerket (Norway)|Televerket]] as office worker, traffic analyst and from 1921 to 1922 and 1930–35 [[Director-general|director general]].<ref>{{Cite web |title=Tore Olaus Engset |url=https://snl.no/Tore_Olaus_Engset |access-date=January 1, 2017 |publisher=Store norske leksikon}}</ref>

He developed the [[Engset formula]] in 1915, before the breakthroughs of [[A. K. Erlang]] from 1917.  His 1915 manuscript "Om beregningen av vælgere i et automatisk telefonsystem" (1915) was not, however, published until 1918. That work was translated to German as "Die Wahrscheinlichkeitsrechnung zur Bestimmung der Wählerzahl in automatischen Fernsprechämtern", in ''[[Elektrotechnische Zeitschrift]]'', Heft 31, 1918. An English translation appeared in [[Arne Myskja]], "On the Calculation of Switches in an Automatic Telephone System" in ''Telektronikk'', 94(2):99-142, 1998.

He also published a work on [[nuclear physics]] (1927): "Die Bahnen und die Lichtstrahlung der Wasserstoffelektronen. Ergänzende Betrachtungen über Bahnformen und Strahlungsfrequenzen" (3 parts) in ''[[Annalen der Physik]]'', 82 (1927) 1017; 83 (1927) 903; 84 (1927) 880.

==References==
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==Bibliography==
*Arne Myskja: T. Engset in New Light. The 14th Nordic Teletraffic Seminar (NTS-14), Lyngby, Denmark, August 18–20, 1998.
*Arne Myskja: The Engset Report of 1915. Summary and Comments. Telektronikk, vol. 94, no. 2, pp.&nbsp;143–153, 1998.
*Arne Myskja, Ola Espvik: Tore Olaus Engset - The man behind the formula. Tapir Academic Press, Trondheim, Norway, 2002. {{ISBN|82-519-1828-6}}.

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{{DEFAULTSORT:Engset, Tore O.}}
[[Category:1865 births]]
[[Category:1943 deaths]]
[[Category:People from Stranda]]
[[Category:University of Oslo alumni]]
[[Category:Norwegian mathematicians]]
[[Category:Norwegian engineers]]
[[Category:Queueing theorists]]


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