Period: 1930 - 1934

Plakidis Stavros
Position: Faculty, University of Athens PhD: 1931, Department of Physics, University of Athens, Greece Thesis: On the irregularities of the periods of the long period variable stars Supervisor(s): Eginitis Demetrios - Eddington Arthur Stanley Biography:
Xanthakis John
Position: Faculty, Academy of Athens PhD: 1930, Dept. of Mathematics, University of Athens, Greece Thesis: A contribution to the theory of anomalies of first order differential equations Supervisor(s): Zervos Panagiotis Biography: John P. Xanthakis (1904 - 1994) Member of the Academy of Athens, Emeritus Professor of Astronomy of the Aristotle University of Thessaloniki, Greece (born 1904). He got the degree in Mathematics from the University of Athens, Greece (1925), the Ph.D. from the same University (1929) and further education at the University of Strasburg (1930-1934). He worked as a high school teacher (1934-1939), Professor at the National Military School of Athens (1939-1940) and as Professor at the Aristotle University of Thessaloniki (1940-1956). He was elected as a member of the Academy on Athens in 1955 and he has served as its President (1964) and Publication secretary and member of its Governing Board since then. He has been twice a vice-minister of Agriculture in temporary Greek Governments (1963 and 1964) and Chairman to many boards of scientific societies. He had served for many years as a Chairman of the National Astronomical Committee. He had written many papers in mathematical Analysis, Astronomy (especially on solar activity) and 7 textbooks. A special “Compedium in Astronomy” has been published by D. Reidel Publishing Co. (1982) on the occasion of his 25 years scientific activity. He had been a warm supporter of the publication of the first edition of this list of Greek Astronomers (1992) as Chairman of the National Astronomical Committee.
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