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Hans Michael Maitzen (born 28 March 1943 in Graz) is an Austrian astronomer. After elementary (1949-1953) and secondary school attendance (1953-1961) in Graz, he began studying astronomy, mathematics and physics at the University of Graz in 1961, completing a PhD in astronomy in July 1967. During the last three years of his studies he was also a scientific assistant at the Institute for Astronomy at the University of Graz.〔(S-ro OProf. Hans Michael MAITZEN ), International Academy of Sciences (''Akademio Internacia de la Sciencoj'', AIS), San Marino. Accessed 25 August 2012.〕 Thereafter he was a scientific assistant at the Institute of Astronomy of the University of Bochum from 1969 until 1976. From then till 1985 he was scientific assistant in the Institute of Astronomy at the University of Vienna. In March 1980 Maitzen received his ''Doctor habilitatus'' there in astronomy. Since 1985 he has been a scientific advisor at the institute.〔 Author of more than 200 scientific publications, he has since 1986 represented the Austrian astronomical community in its relations with the European Southern Observatory (ESO).〔 In March 1989, Kurt Waldheim, the federal president of Austria, granted him the title ''Außerordentlicher Professor'' ("Extraordinary university professor"). Maitzen developed a filter-photometric tool for discovering chemically peculiar magnetic stars, which detects a distinctive flux depression in the radiation of these stars around the 520-nanometre wavelength. Maitzen is married and has four children. ==Esperanto activities== Maitzen is a professor of the International Academy of Sciences San Marino, known by its Esperanto initials as AIS, and has contributed to many of its study sessions. For several years he has served as a member of the AIS Academic Senate; from 2012 to 2015 he is serving as the Academy's president. Maitzen is an active Esperantist. From 1968 to 1969 he was president of the World Esperanto Youth Organization. Several times he helped organize contributions to the ''Internacia Kongresa Universitato,'' which offers specialized lecture programs coinciding with the annual World Congress of Esperanto of the UEA. In Vienna he has made significant contributions to Esperanto life and culture through a 1987 international scientific symposium for the 100th anniversary of the Esperanto language and with a 2001 seminar on the occasion of the European Year of Languages. He collaborated on astronomical terminology for the second edition of ''Plena Ilustrita Vortaro de Esperanto'', a very extensive monolingual Esperanto dictionary often abbreviated as PIV. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Hans Michael Maitzen」の詳細全文を読む スポンサード リンク
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