... Ronald M. Sega (Ph.D.) . NASA Astronaut (former) . ... EDUCATION: Graduated from Nordonia High School, Macedonia, Ohio, in 1970; received a bachelor of science degree in Mathematics and Physics from the U.S. Air Force Academy in 1974, a master of science degree in Physics from Ohio State in 1975, and a doctorate in Electrical Engineering from University of Colorado in 1982. ... As a pilot, Dr. Sega has logged over 4,000 hours in the Air Force, Air Force Reserves, and NASA. ...

... To evaluate the impact of artificial lighting on huma n hea lth, primarily through disruption of circadian biologica l rhythms or sleep, as well as the impact of hea dla mps, nighttime lighting schemes, and glare on driving safety. ... Circadian regula tion of molecular, dietary, and metabolic signaling mechanisms of huma n breast cancer growth by the nocturnal melatonin signal and the consequences of its disruption by light at night. ... Night shift work, light at night, and risk of breast cancer. ...

Journal of the Amateur Astronomers Association of New York December 2007 Volume 55 Number 12, ISSN 0146-7662 EYEPIECE News of the October 24 ou t b u r st sp r ea d q u ick ly, and observers quickly trained their telescopes, binoculars and eyes on Holmes, which had brightened to nearly second magnitude. ... There was speculation the comet was breaking up, but it turned out the second spot was a background star. ... If we're lucky, this comet could reach 5th magnitude in late December. ...