Word: electromagneticism
(lookup in dictionary)
(lookup stats)
Dates: all
Sort By: most recent first
(reverse)
First enunciated in 1949, the fairness doctrine marked a recognition by the FCC that broadcasters have special obligations. Because stations are licensed by the Government and use a scarce public resource -- the electromagnetic spectrum -- the Government, it was reasoned, has the power to require that they use that resource in...
To learn how fast sections of the hull are corroding, the drone poked "stab sensors" through encrusted sea life and rust and measured the electromagnetic field at the ship's surface. Reason: the Monitor's iron and steel combine with salt water to form a weak natural battery. The resulting...
Taylor should know: a nuclear-weapons designer at Los Alamos from 1949 to 1956, he later worked for General Dynamics' atomic division and served as deputy director of what is now the Defense Nuclear Agency. In the April Scientific American, he argues that designers can enhance or suppress any of...
One advanced version is the Excalibur, already being tested, which boosts the X rays produced by a nuclear explosion. The idea is to use the X rays to power lasers, which would then be targeted at enemy missiles as they fly through space. Taylor argues that microwaves are a better...
High-temperature superconducting magnets may become important in the maglev, or magnetically levitated, trains under development in Japan and West Germany. And scientists at Japan's Mercantile Marine University in Kobe have already developed a working scale model of a ship with a propulsion system based on magnetism. Physicist Yoshiro...