Definitions for "Ptolemy"
(1) Alexandrian astronomer who proposed a geocentric system of astronomy that was undisputed until Copernicus (2nd century AD). (2) An ancient dynasty of Macedonian kings who ruled Egypt from 323 BC to 30 BC; founded by Ptolemy I and ended with Cleopatra.
Ancient Greek geographer.
Greek general from Macedonia who, after the death of Alexander the Great, became ruler of Egypt; the "Ptolemaic" period, when Egypt was ruled by Greeks, lasted from 332 B.C. to 30 B.C.
The Ptolemy project studies modeling, simulation, and design of concurrent, real-time, embedded systems. The focus is on assembly of concurrent components. The key underlying principle in the project is the use of well-defined models of computation that govern the interaction between components. A major problem area being addressed is the use of heterogeneous mixtures of models of computation. A software system called Ptolemy II is being constructed in Java. The work is conducted in the Department of Electrical Engineering and Computer Sciences of the University of California at Berkeley.