Matches in DBpedia 2015-10 for { <http://dbpedia.org/resource/William_Markowitz> ?p ?o }
- William_Markowitz abstract "William Markowitz (February 8, 1907, Vítkov, Austrian Silesia - October 10, 1998, Pompano Beach, Florida) was an American astronomer, principally known for his work on the standardization of time.His mother was visiting Melč, Vítkov in Austrian Silesia (now cs:Melč, Czech Republic) when William was born. The Polish family emigrated to the U.S. in 1910 and settled in Chicago.William earned his doctorate from the university in 1931, under W.D. MacMillan. He taught at Pennsylvania State College before joining the United States Naval Observatory in 1936, working under Paul Sollenberger and Gerald Clemence in the time service department.After having married Rosalyn Shulemson in 1943, Markowitz eventually became director of the department. He developed the ephemeris time scale, which had been adopted by the IAU in 1952 on a proposal formulated by Clemence in 1948, as an international time standard. He subsequently worked with Louis Essen in England to calibrate the newly developed atomic clocks in terms of the ephemeris second. The fundamental frequency of caesium atomic clocks, which they determined as 9,192,631,770 ± 20 Hz, was used to define the second internationally since 1967. At the International Astronomical Union (IAU) meeting in Dublin in 1955, he had proposed the system of distinguishing between variants of Universal Time, as UT0 (UT as directly observed), UT1 (reduced to invariable meridian by correcting to remove effect of polar motion) and UT2 (further corrected to remove (extrapolated) seasonal variation in earth rotation rate), a system which remains in some use today.He served as President of the IAU commission on time from 1955 to 1961, and was active in the International Union of Geodesy and Geophysics, the American Geophysical Union, and the International Consultative Committee for the Definition of the Second.After retirement in 1966, Markowitz served as professor of physics at Marquette University until 1972, and also held a post at Nova Southeastern University.".
- William_Markowitz birthDate "1907-02-08".
- William_Markowitz birthPlace Austrian_Silesia.
- William_Markowitz birthPlace Vítkov_(Opava_District).
- William_Markowitz birthYear "1907".
- William_Markowitz deathDate "1998-10-10".
- William_Markowitz deathPlace Pompano_Beach,_Florida.
- William_Markowitz deathYear "1998".
- William_Markowitz thumbnail Troppaukreis.jpg?width=300.
- William_Markowitz wikiPageExternalLink markowitz.html.
- William_Markowitz wikiPageID "507412".
- William_Markowitz wikiPageLength "3559".
- William_Markowitz wikiPageOutDegree "50".
- William_Markowitz wikiPageRevisionID "665324314".
- William_Markowitz wikiPageWikiLink American_Geophysical_Union.
- William_Markowitz wikiPageWikiLink Astronomer.
- William_Markowitz wikiPageWikiLink Atomic_clock.
- William_Markowitz wikiPageWikiLink Austrian_Silesia.
- William_Markowitz wikiPageWikiLink Caesium.
- William_Markowitz wikiPageWikiLink Calibration.
- William_Markowitz wikiPageWikiLink Category:1907_births.
- William_Markowitz wikiPageWikiLink Category:1998_deaths.
- William_Markowitz wikiPageWikiLink Category:American_astronomers.
- William_Markowitz wikiPageWikiLink Category:American_people_of_Polish_descent.
- William_Markowitz wikiPageWikiLink Category:Austro-Hungarian_emigrants_to_the_United_States.
- William_Markowitz wikiPageWikiLink Category:Czech_people_of_Polish_descent.
- William_Markowitz wikiPageWikiLink Category:People_from_Austrian_Silesia.
- William_Markowitz wikiPageWikiLink Category:People_from_Vítkov.
- William_Markowitz wikiPageWikiLink Category:Polish_Austro-Hungarians.
- William_Markowitz wikiPageWikiLink Chicago.
- William_Markowitz wikiPageWikiLink Dublin.
- William_Markowitz wikiPageWikiLink England.
- William_Markowitz wikiPageWikiLink Ephemeris_time.
- William_Markowitz wikiPageWikiLink Gerald_Clemence.
- William_Markowitz wikiPageWikiLink Gerald_Maurice_Clemence.
- William_Markowitz wikiPageWikiLink Hertz.
- William_Markowitz wikiPageWikiLink International_Astronomical_Union.
- William_Markowitz wikiPageWikiLink International_Consultative_Committee_for_the_Definition_of_the_Second.
- William_Markowitz wikiPageWikiLink International_Union_of_Geodesy_and_Geophysics.
- William_Markowitz wikiPageWikiLink Louis_Essen.
- William_Markowitz wikiPageWikiLink Marquette_University.
- William_Markowitz wikiPageWikiLink Nova_Southeastern_University.
- William_Markowitz wikiPageWikiLink Paul_Sollenberger.
- William_Markowitz wikiPageWikiLink Pennsylvania_State_College.
- William_Markowitz wikiPageWikiLink Pennsylvania_State_University.
- William_Markowitz wikiPageWikiLink Physics.
- William_Markowitz wikiPageWikiLink Poles.
- William_Markowitz wikiPageWikiLink Polish_people.
- William_Markowitz wikiPageWikiLink Pompano_Beach,_Florida.
- William_Markowitz wikiPageWikiLink Second.
- William_Markowitz wikiPageWikiLink Standardization.
- William_Markowitz wikiPageWikiLink Time.
- William_Markowitz wikiPageWikiLink United_States.
- William_Markowitz wikiPageWikiLink United_States_Naval_Observatory.
- William_Markowitz wikiPageWikiLink Universal_Time.
- William_Markowitz wikiPageWikiLink University_of_Chicago.
- William_Markowitz wikiPageWikiLink Vítkov_(Opava_District).
- William_Markowitz wikiPageWikiLink W.D._MacMillan.
- William_Markowitz wikiPageWikiLink William_Duncan_MacMillan.
- William_Markowitz wikiPageWikiLink File:Troppaukreis.jpg.
- William_Markowitz wikiPageWikiLinkText "Markowitz".
- William_Markowitz wikiPageWikiLinkText "W Markowitz".
- William_Markowitz wikiPageWikiLinkText "William Markowitz".
- William_Markowitz wikiPageWikiLinkText "Wm Markowitz".
- William_Markowitz dateOfBirth "1907-02-08".
- William_Markowitz dateOfDeath "1998-10-10".
- William_Markowitz hasPhotoCollection William_Markowitz.
- William_Markowitz name "Markowitz, William".
- William_Markowitz placeOfBirth Austrian_Silesia.
- William_Markowitz placeOfBirth Vítkov_(Opava_District).
- William_Markowitz placeOfDeath Pompano_Beach,_Florida.
- William_Markowitz shortDescription "American astronomer".
- William_Markowitz wikiPageUsesTemplate Template:Authority_control.
- William_Markowitz wikiPageUsesTemplate Template:Persondata.
- William_Markowitz wikiPageUsesTemplate Template:Reflist.
- William_Markowitz wikiPageUsesTemplate Template:See_also.
- William_Markowitz description "American astronomer".
- William_Markowitz description "American astronomer".
- William_Markowitz subject Category:1907_births.
- William_Markowitz subject Category:1998_deaths.
- William_Markowitz subject Category:American_astronomers.
- William_Markowitz subject Category:American_people_of_Polish_descent.
- William_Markowitz subject Category:Austro-Hungarian_emigrants_to_the_United_States.
- William_Markowitz subject Category:Czech_people_of_Polish_descent.
- William_Markowitz subject Category:People_from_Austrian_Silesia.
- William_Markowitz subject Category:People_from_Vítkov.
- William_Markowitz subject Category:Polish_Austro-Hungarians.
- William_Markowitz hypernym Astronomer.
- William_Markowitz type Agent.
- William_Markowitz type Article.
- William_Markowitz type Person.
- William_Markowitz type Scientist.
- William_Markowitz type Article.
- William_Markowitz type Scientist.
- William_Markowitz type Person.
- William_Markowitz type Agent.
- William_Markowitz type NaturalPerson.
- William_Markowitz type Thing.
- William_Markowitz type Q215627.
- William_Markowitz type Q5.