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Studies modeling, simulation, and design of concurrent, real-time, embedded systems. Focus: assembly of concurrent components. Key underlying principle: use of well-defined computation models that govern interaction between components. ... The Ptolemy project studies modeling, simulation, and design of concurrent,
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ptolemy.eecs.berkeley.edu/
ptolemy.eecs.berkeley.edu/
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Ptolemy (about 85-about 165) ... Claudius Ptolemy ... Ptolemy was the most influential of Greek astronomers and geographers of his time. He propounded the geocentric theory that prevailed for 1400 years.
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www-history.mcs.st-andrews.ac.uk/history/Mathematicians...
www-history.mcs.st-andrews.ac.uk/history/Mathematicians/Ptolemy.html
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Nothing reliable is known of Claudius Ptolemy's life that cannot be deduced from his surviving works; only a few brief and unsupported biographical statements are made by much later sources. 'Claudius' suggests he held Roman citizenship, 'Ptolemy' that he was of Greek descent and lived in Egypt.
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www.hps.cam.ac.uk/starry/ptolemy.html
www.hps.cam.ac.uk/starry/ptolemy.html
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Ptolemy probably took part in Alexander's Persian campaign from the very beginning, in 334. There is one casual reference to a Ptolemy who was present during the northern campaign of 335, but we are not certain whether this refers to the son of Lagus or another Ptolemy.
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www.livius.org/ps-pz/ptolemies/ptolemy_i_soter.htm
www.livius.org/ps-pz/ptolemies/ptolemy_i_soter.htm
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However, after the death of Ptolemy IV Philopator in 204, his son Ptolemy V Epiphanes was too young to rule, and his wife Arsinoe was murdered. During this crisis, the Seleucid king Antiochus III the Great and Philip V of Macedonia decided to attack the Ptolemaic empire and divide the booty.
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www.livius.org/ps-pz/ptolemies/ptolemies.htm
www.livius.org/ps-pz/ptolemies/ptolemies.htm
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These ideas concerning uniform circular motion and epicycles were catalogued by Ptolemy in 150 A.D. His book was called the "Almagest" (literally, "The Greatest"), and this picture of the structure of the Solar System has come to be called the "Ptolemaic Universe".
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csep10.phys.utk.edu/astr161/lect/retrograde/aristotle.h...
csep10.phys.utk.edu/astr161/lect/retrograde/aristotle.html
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Claudius Ptolemy was one of the most influential Greek astronomers, geographers and mathematicians of all time, known best for his Almagest and Geography. ... Ptolemy; From About's Geography Guide, an article on Ptolemy who is estimated to have lived from approximately A.D. 90-170, and worked in the library at Alexandria...
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ancienthistory.about.com/od/claudiusptolemy/Ptolemy_Cla...
ancienthistory.about.com/od/claudiusptolemy/Ptolemy_Claudius.htm
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The Life and Work of Ptolemy, and his importance to the history of astrology ... Claudius Ptolemaeus, better known as Ptolemy, lived and worked in the middle of the 2nd century AD. His astrological textbook - the Tetrabiblos - became the standard bearer for subsequent generations.
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www.skyscript.co.uk/ptolemy.html
www.skyscript.co.uk/ptolemy.html
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