power-line carrier phase comparison scheme
41Quadrature amplitude modulation — (QAM) (Pronounced IPA|kwa:m) is a modulation scheme which conveys data by changing ( modulating ) the amplitude of two carrier waves. These two waves, usually sinusoids, are out of phase with each other by 90° and are thus called quadrature… …
42Romania — /roh may nee euh, mayn yeuh/, n. a republic in SE Europe, bordering on the Black Sea. 21,399,114; 91,699 sq. mi. (237,500 sq. km). Cap.: Bucharest. Romanian, România /rddaw mu nyah/. * * * Romania Introduction Romania Background: Soviet… …
43România — /rddaw mu nyah/; Eng. /roh may nee euh, mayn yeuh/, n. Romanian name of ROMANIA. * * * Romania Introduction Romania Background: Soviet occupation following World War II led to the formation of a Communist peoples republic in 1947 and the… …
44Solar thermal energy — Solar thermal system for water heating in Santorini, Greece …
45List of Robotech characters — This is a list of the major fictional characters in Robotech, the American adaptation of three Japanese animated series: The Super Dimension Fortress Macross, The Super Dimension Cavalry Southern Cross, and Genesis Climber Mospeada, as a single… …
46electromagnetic radiation — Physics. radiation consisting of electromagnetic waves, including radio waves, infrared, visible light, ultraviolet, x rays, and gamma rays. [1950 55] * * * Energy propagated through free space or through a material medium in the form of… …
47Christianity — /kris chee an i tee/, n., pl. Christianities. 1. the Christian religion, including the Catholic, Protestant, and Eastern Orthodox churches. 2. Christian beliefs or practices; Christian quality or character: Christianity mixed with pagan elements; …
48Narrow gauge railway — Track gauge by size Broad gauge St …
49Poland — /poh leuhnd/, n. a republic in E central Europe, on the Baltic Sea. 38,700,291; ab. 121,000 sq. mi. (313,400 sq. km). Cap.: Warsaw. Polish, Polska. * * * Poland Introduction Poland Background: Poland is an ancient nation that was conceived around …
50Airship — For other uses, see Airship (disambiguation). Dirigible redirects here. For the 1931 film, see Dirigible (film). Not to be confused with Balloon (aircraft) or Blimp. Airship …
