Demetrios Christodoulou (Greek: Δημήτριος Χριστοδούλου; born October 19, 1951) is a Greek mathematician and physicist, who first became well known for his proof, together with Sergiu Klainerman, of the nonlinear stability of the Minkowski spacetime of special relativity in the framework of general relativity.
Christodoulou was born in Athens and received his doctorate in physics from Princeton University in 1971 under the direction of John Archibald Wheeler. After temporary positions at Caltech, CERN, and the Max Planck Institute for Physics, he became Professor of Mathematics, first at Syracuse University, then at the Courant Institute, and at Princeton University, before taking up his current position as Professor of Mathematics and Physics at the ETH Zurich in Switzerland.
In 1993, he published a book coauthored with Klainerman in which the extraordinarily difficult proof of the stability result is laid out in detail. In that year, he was named a MacArthur Fellow. In 1991, he published a paper which shows that the test masses of a gravitational wave detector suffer permanent relative displacements after the passage of a gravitational wave train, an effect which has been named "nonlinear memory effect". In the period 1987–1999 he published a series of papers on the gravitational collapse of a spherically symmetric self-gravitating scalar field and the formation of black holes and associated spacetime singularities. He also showed that, contrary to what had been expected, singularities which are not hidden in a black hole also occur. However, he then showed that such "naked singularities" are unstable. In 2000, Christodoulou published a book on general systems of partial differential equations deriving from a variational principle (or "action principle"). In 2007, he published a book on the formation of shock waves in 3-dimensional fluids. In 2009 he published a book where a result which complements the stability result is proved. Namely, that a sufficiently strong flux of incoming gravitational waves leads to the formation of a black hole.
Christodoulou is a recipient of the Bôcher Memorial Prize, a prestigious award of the American Mathematical Society. The Bôcher Prize citation mentions his work on the spherically symmetric scalar field as well as his work on the stability of Minkowski spacetime. In 2008 he was awarded the Tomalla prize in gravitation. In 2011, he and Richard S. Hamilton won the Shaw Prize in the Mathematical Sciences, "for their highly innovative works on nonlinear partial differential equations in Lorentzian and Riemannian geometry and their applications to general relativity and topology". The citation for Christodoulou mentions his work on the formation of black holes by gravitational waves as well as his earlier work on the spherically symmetric self-gravitating scalar field and his work with Klainerman on the stability of Minkowski spacetime. Christodoulou is a member of the American Academy of Arts and Sciences and of the U.S. National Academy of Sciences. In 2012 he became a fellow of the American Mathematical Society. In 2014 he was a plenary speaker at the ICM in Seoul.
Emeritus Professor of Advanced Mathematics, National Air Force Academy, Greece. He was born in Athens, Greece, on the 11th of September, 1939. He received his B.Sc. in Mathematics from the University of Athens, Greece (1963), a Special B.Sc. Degree in Mathematics from the University of London, U.K. (1969) and his Ph.D. in Mathematics from the University of Athens (1973). Prior to becoming a Professor at the Air Force Academy he had worked as a high-school teacher of Mathematics as well as Assistant and Chief-Assistant at the Laboratory of Astronomy, University of Athens, Greece. His scientific interests included Applied Mathematics, Relativity, Astrophysics, Geophysics and Celestial Mechanics. He has published more than 50 scientific papers in international refereed journals and in international conferences as well as more than 10 textbooks and 15 other books.
Associate Professor (retired), Dept. of Physics, University of Athens, Greece. He was born in Athens,
Greece, on the 25th of March, 1944. He received the
B.Sc. in Physics from the University of Athens, Greece
(1967) and the Ph.D. in Astrophysics from the same
University (1971). He has been awarded by the Physics
Department of this University the title of Docent in
Physics (1980). He has worked as Assistant Professor
before promoted to the present rank. He has worked also
in various institutes and mainly as scientific Collaborator
at the Rome University, Physics Institute (1968-1969), at
the Max-Planck Institut für Kernphysik, Heidelberg
(1976), at the Max-Planck Institut für Astrophysik, Garching b. Muenchen (1977) and at the Max-Planck Institut Lindau, Germany (1979). His scientific interests include Space Weather, Interplanetary Space, Magnetic Clouds, Ultra High Energy Astrophysics, Pierre Auger Observatory, Natural Radioactivity and radon. He has published more than 52 scientific papers in refereed journals and more than 91 papers in conference proceedings and special volumes / books. He has also published four textbooks on “Nuclear Technology-Recent Applications”, on “Nuclear Energy-Society”, on the “Study of the Cosmic Rays via its Nuclear Component” and on the “Study of the Low-Temperature Phenomenon of Interplanetary Plasma, using VELA, IMP and HELIOS Satellite Data”. He is a member of several National and International Societies including the Hellenic Astronomical Society (Hel.A.S.).
Professor (retired), University of Patras, Greece (1981-2014), and Director, Institute of Astronomy and Astrophysics, National Observatory of Athens, Greece (2001-2011). He was born in Piraeus, Greece, on 15th of April 1947. He got his B.Sc. in physics from the University of Athens, Greece (1969), the M.Sc. from the University of Manchester, U.K. (1972) and his Ph.D. from the same University. He worked as a Researcher at the Department of Physics and Astrophysics at the University of Manchester (1974-1979) and at the Max-Planck-Institut für Astronomie (1979-1981). He has published many special volumes as well as 13 textbooks on Astrophysics and many books on popular Astronomy.
Menas C. Kafatos (born 25 March 1945) is an American physicist of Greek descent and a writer on spirituality and science. His publications include: The Nonlocal Universe and The Conscious Universe. Kafatos has written and lectured extensively promoting discourse between science, spirituality, and religion. He has held numerous positions at institutions including Chapman University, George Mason University, and NASA Goddard Space Flight Center. Kafatos received his B.A. in Physics from Cornell University in 1967 and a Ph.D. in Physics from the Massachusetts Institute of Technology (MIT) in 1972. After postdoctoral work at NASA Goddard Space Flight Center, he joined George Mason University and was University Professor of Interdisciplinary Sciences from 1984-2008, where he also served as Dean of the School of Computational Sciences and Director of the Center for Earth Observing and Space Research. He and a team of computational scientists joined Chapman University in the fall of 2008, where he was the Founding Dean of the Schmid College of Science and Technology serving as dean from 2009 – 2012. He currently is the director of the Center of Excellence in Earth Systems Modeling and Observations (CEESMO).
Kafatos has authored books including The Conscious Universe, The Non-local Universe (with Robert Nadeau, Springer-Verlag and Oxford University Press), Principles of Integrative Science (with Mihai Draganescu, Romanian Academy of Sciences Press), and more than 300 peer reviewed publications. Kafatos research has focused on cosmology, astrophysics, quantum mechanics, quantum biology, natural hazards, climate change, Earth system science, and remote sensing.
Notable scientific contributions include enhancements to synthetic tropical cyclone (hurricane) circulations used in forecast models, new perspectives on the self organization of the universe through the lens of complexity, a detailed look at the relationship between vegetation in the United States and El Nino/Southern Oscillation, and a better understanding of dust and aerosols over India.
Emeritus Professor of Astrophysics, University of Athens,
Greece He was born in Athens, Greece, on the 18th of
December, 1939. He obtained the B.Sc. in Physics from the
University of Athens (1965), the M.Sc. in Radioelectrology
(1967) from the same University, the M.Sc. in Astronomy
from the University of Victoria, B.C. Canada (1970) and the
Ph.D. in Astrophysics on a Canadian “R. M. Petrie Memorial
Fellowship” from the same University (1972). He has
worked as a Summer Assistant at the Dominion
Astrophysical Observatory (D.A.O.), Victoria, B.C. Canada
(summers 1970 & 1971). He has worked as Assistant at the
Laboratory of Astronomy of the University of Athens before
leaving for Victoria and returned as Chief Assistant at this Laboratory after the Ph.D. (10/1972). He was elected Docent of the School of Physics and Mathematics of this University (1976) and he received a teaching assignment next year (1977). He became Assistant Professor (1982) and Associate Professor of Astrophysics (1986) at the same University. His scientific interests include Spectroscopy and Photometry of Variable Stars, especially of the β Cephei stars, and Theoretical Stellar Structure and Evolution. He has published more than 70 scientific papers in refereed journals and proceedings of the conferences and workshops. He has many articles written as well as a dozen of textbooks (in Greek) on “Stellar Atmospheres”, “Interstellar Matter”, “Stellar Structure and Evolution”, “Astrophysics”, “Practical Astronomy”, “Optics”, “Physical Chemistry”, “Laboratory Exercises in Astronomy”, e.t.c. He has also published a popular book on life in the Universe (“On UFO’s footsteps”). He has served in various elected positions in the University of Athens, namely, as President of the Department of Physics for 5 terms (1989-1991, 1991-1994, 1996-1998, 1998- 2000 and 2004-2006), as a Vice-President of the same Department (2000 – 2002), as Director of the Section of Astrophysics, Astronomy and Mechanics (1986,1987,1988,1989, 1995,1996, 2002,2003), as Director of the Laboratory of Astrophysics (1987-1999), as Director of Graduate Studies of the Department of Physics (1998-2004), as member of the Senate of the University of Athens (1998- 2006) and as member of various other committees. As President of the Department of Physics he succeeded in moving this Department in brand new buildings at the Panepistimiopolis Campus of the University of Athens and in obtaining a donation from a private donor of a 40-cm robotic telescope of the Department’s choice, which is currently the ornament of the new buildings and the basic teaching instrument of graduate and undergraduate students of Astronomy and Astrophysics. Also he founded the new (1993) program of graduate studies of the Department of Physics and later he managed to obtain a European funding for it. He has been a member (1989-1992 and 2002-2005) and Chairman (2005-2007) of the Greek National Committee for Astronomy. He has been a member of the Governing Council of the Foundation of Government Fellowships (I.K.Y) (1989-1992), Vice Chairman of the SELETE Board (1993), a member of the First Faculty of the University of Aegean (1993) and a member of various other boards. He is a member of the International Astronomical Union (IAU), a founding member, first Secretary, Treasurer and President (2002-2006) of the Hellenic Astronomical Society (Hel.A.S.), and a member of the Greek Union of Physicists. He is the organizer of the first Pan-Hellenic Astronomical Conference (1991) - where Hel.A.S. has actually been born - and the editor of its proceedings. He has also organized two international IAU Symposia in Sounion (1979) on the Galactic X-Ray sources and in Porto-Heli (1985) on Luminous Stars and Associations in the Galaxy and he was a co-editor of their proceedings.
Professor Emeritus, Department of Engineering Sciences, University of Patras, Greece. He was born in Xylokastro, Korinthias in 1944. He received the B.Sc. in Mathematics from the University of Athens, Greece (1967), the M.Sc. from the Rochester Polytechnic Institute of the U.S.A. (1970) and the Ph.D. from the University of Glascow, U.K. (1973), where he worked as Resercher. His scientific interests include Celestial Mechanics and the Dynamical Systems. He is a member of the International Astronomical Union (IAU), of the Greek Societies of Mehanics and Computer Mechanics and a past member of the Hellenic Astronomical Society (Hel.A.S.). He has been honored with the title of D.Sc. from the University of Glascow (1980).
Dr. Andreas -Andy- Gerasimos Michalitsianos (Greek: Ανδρέας Γεράσιμος Μιχαλιτσιάνος) (May 22, 1947 – October 29, 1997) was a Greek-American astronomer and a NASA astrophysicist, also known and published as Andrew G. Michalitsianos.
Born in Alexandria, Egypt on May 22, 1947, Andreas grew up with his mother, who spoke little English and briefly, with his father. He moved with his family to New York City in 1949 and lived in the Queens borough before going to college. Michalitsianos father, Gerasimos Andreas, was a sea captain of a Greek tanker, the SS Foundation Star (formerly SS Lampas), but the ship was caught up in a hurricane and sunk in September 1952 off the coast of Norfolk, Virginia and Michalitsianos father died of pneumonia shortly after rescue. Andreas showed an early interest in astronomy and physics from an early age, winning a science contest in 1959 and serving as president of the Junior Astronomy Club in NYC where his accomplishments included leading a South American eclipse expedition. He graduated from Newtown High School in 1965 and then earned his bachelors degree in physics from the University of Arizona at Tucson in 1969, working at the nearby Kitt Peak National Observatory as a student employee in the Space Division to help pay off his college debts. His duties at Kitt Peak included the initial tests of a remotely controlled telescope.
Andreas then received a scholarship and earned his Ph.D. in astrophysics from University of Cambridge, Churchill College in 1976 while doing research on a theoretical topic in solar physics. He would later work as a junior research fellow at the California Institute of Technology and then as an astrophysicist at NASAs Goddard Space Flight Center from the 1970s until his death. Michalitsianos was involved with such projects as the Hubble Space Telescope and was the Deputy Project Manager of the Observatory Branch for Goddards highly successful International Ultraviolet Explorer, in which he won several awards for his contributions. Michalitsianos eventually went on to become Chief of the Laboratory for Astronomy and Solar Physics at the Goddard Space Flight Center in early 1997, and was renowned for his breakthrough research on symbiotic stars. His many awards included the NASA Meritorious Achievement Award.
Michalitsianos died on October 29, 1997 in Baltimore, Maryland after a long struggle with a brain tumor. Until his last days he was hard at work rejuvenating the Laboratory of which he had recently taken command, and on a proposal for a spacecraft to monitor temporal changes in the ultraviolet and X-ray spectra of stars and active galaxies. He is survived by a wife, two daughters, a sister, and one son.
A landbased robotic telescope on the island of Cefalonia in western Greece is named in his honor. The Andreas Gerasimos Michalitsianos telescope, located within a former Hellenic Air Force communications station, has been utilized by Greek universities and The Eudoxos Project to advance Greek secondary education in introductory astronomy and physics laboratories for high school students.
Professor Nickas was born in Chicago, Illinois March 7, 1942. He received the Bachelor of Science degree in Physics from the Illinois Institute of Technology in 1964. From there to the University of Illinois earning he M.S. and PhD in astronomy. Then he did a postdoctoral fellowship with Prof. Maurice H. L. Pryce, Dept. of Physics, University of British Columbia, Vancouver, British Columbia, Canada (1972-76). Following that he was Scientist for McDonald Research Associates, Ltd, Vancouver, B.C., Canada 1978-80. Then he obtained Assistant Professor positions in the Dept of Physics /Trinity University, San Antonio, Texas, USA (1982-85), the Dept of Physics/Ithaca College, Ithaca, New York USA (1985-89). Finally he was Prof. of Physics and Astronomy and Chairman of Dept of Physics and Astronomy/Hanover College, 1989-2014. He is currently retired and reside in Corpus Christi, Texas, USA
Prof. Nickas was a member of the American Astronomical Society and the American Association of Physics Teachers, American Association of Variable Star Observers during my career. He is currently a member of The Planetary Society.
John Christopher Baillie Papaloizou (born 1947) is a theoretical physicist. Papaloizou is a professor at the Department of Applied Mathematics and Theoretical Physics (DAMTP) at the University of Cambridge. He works on the theory of accretion disks, with particular application to the formation of planets. He received his D.Phil. in 1972 from the University of Sussex under the supervision of Roger J. Tayler. The title of his thesis is The Vibrational Instability in Massive Stars.
He discovered the Papaloizou-Pringle instability together with Jim Pringle in 1984. Papaloizou also made major contributions in various areas such as the radial-orbit instability, toroidal modes in stars and different instabilities in accretion disks.
The asteroid 17063 Papaloizou is named after John Papaloizou.
Emeritus Professor of the Aristotle University of Thessaloniki, Greece. He was born in Athens, Greece on the 17th of March, 1940. He received the B.Sc. in Mechanical – Electrical Engineering from the National Technical University of Athens (1964) and the Ph.D. from the University of Chicago, U.S.A. (1970). He has been Research Associate at the Universities of Texas and Cambridge. Scientifically he is mainly interested in the General theory of Relativity and he has published many papers on this subject. He has a rich editorial work and has published various textbooks. He is a member of the International Astronomical Union (IAU), of the American Physical Society, of the I.S.G.R.G, of the T.E.E. and a founding member of the Hellenic Astronomical Society (Hel.A.S.).
Petropoulos Vassilios, (1938-2008)
Senior Researcher Research Center for Astron. and Applied Mathematics, Academy of Athens, Greece. He was born in Athens, Greece and received the B.Sc. in Physics from the University of Bordeaux, France (1961) and the M.Sc. (1968) and the Doctorat d’ Etat (1974) both from the University of Paris VI, France. He has worked as Researcher at C.N.R.S. of France (1961-74) and associated scientist at the School of Physics and Mathematics of the University of Patras, Greece (1974-75). His scientific interests included atomic and molecular Physics, Solar and Planetary ￼Physics, Cosmic Radiation and Solar- Terrestrial Relations.
Poulakos Constantinos, (1936-2009)
Senior Researcher, Research Center for Astronomy and Applied Mathematics, Academy of Athens, Greece. He was born in Kozani, Greece and received the B.Sc. in Mathematics from the University of Athens, Greece (1960) and the Ph.D. from the same University in 1970. His scientific interests included the Solar and Solar-Terrestrial Phenomena and the study of the atmosphere.
Researcher (retired) of the Astronomical Institute of the National Observatory of Athens (N.O.A.), Greece. He was born in Athens on the 3rd of March, 1934. He received the B.Sc. in Physics (1960), the M.Sc. in Radioelectrology (1963) and the Ph.D. (1970), all from the University of Athens, Greece. He has worked as associate scientist at the National Research Foundation and served as a Director of the Penteli Astronomical Station of the N.O.A. He is a member of the International Astronomical Union (IAU), of CESRA, of the European Physical Society, of the Joint Organization of Solar Observers (JOSO) (where he has served as National Representative of Greece), of the European Astronomical Society, of the Greek Physics Union and he is a founding member of the Hellenic Astronomical Society (Hel.A.S.).