(Encyclopedia) operational amplifier, amplifier whose output voltage is proportional to the negative of its input voltage and that boosts the amplitude of an input signal many times, i.e., has a very…
(Encyclopedia) Wilson, Robert Woodrow, 1936–, American radio astronomer, b. Houston, Tex., Ph.D. California Institute of Technology, 1962. In 1964 he and co-researcher Arno Penzias began monitoring…
(Encyclopedia) Agre, Peter Courtland, 1949–, American molecular biologist, b. Northfield, Minn., M.D. Johns Hopkins, 1974. From 1981 to 2005, Agre taught at Johns Hopkins in the departments of…
(Encyclopedia) WaterlooWaterloowôtərl&oomacr;ˈ [key]. 1 City (1991 pop. 71,181), SE Ont., Canada. It adjoins Kitchener. Several large insurance companies have their main offices there, and the…
Profiles of leading female CEOs and business executives Meg Whitman, CEO of eBay, speaking at the Intershop Open Conference in 1999. Top Female CEOs Brenda Barnes…
(Encyclopedia) sound recording, process of converting the acoustic energy of sound into some form in which it can be permanently stored and reproduced at any time.
In 1855 the inventor Leon Scott…
ROE, Robert A., a Representative from New Jersey; born in Wayne, Passaic County, N.J., February 28, 1924; attended Oregon State University, Corvallis, Or.; attended Washington State University…
WILLIAMS, Lawrence Gordon, a Representative from Pennsylvania; born in Pittsburgh, Pa., September 15, 1913; moved to Philadelphia in June of 1922; graduated from Frankfort High School, and…
