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spintronics

(Encyclopedia)spintronics, spin electronics, or magnetoelectronics, science and technology that harnesses the spin state of electrons in addition to the electrical charge state to store data or perform calculation...

Gesualdo, Carlo

(Encyclopedia)Gesualdo, Carlo kärˈlō jāzo͞oälˈdō [key], Prince of Venosa, c.1560–1613, Italian composer. Gesualdo's first musical work was published in 1585. His complex later madrigals, contained in the ...

flux, magnetic

(Encyclopedia)flux, magnetic, in physics, term used to describe the total amount of magnetic field in a given region. The term flux was chosen because the power of a magnet seems to “flow” out of the magnet at ...

Evenki Autonomous Area

(Encyclopedia)Evenki Autonomous Area ĕvyĕnˈkē [key], former administrative division, 287,645 sq mi (745,000 sq km), N ...

Reber, Gröte

(Encyclopedia)Reber, Gröte, 1911–2002, American radio engineer, b. Chicago, Ill. After graduating from the Armour Institute of Technology (now the Illinois Institute of Technology) in 1933, Reber worked for seve...

pumice

(Encyclopedia)pumice pŭmˈĭs [key], volcanic glass formed by the solidification of lava that is permeated with gas bubbles. Usually found at the surface of a lava flow, it is colorless or light gray and has the g...

Rhea, in astronomy

(Encyclopedia)Rhea, in astronomy, one of the named moons, or natural satellites, of Saturn. Also known as Saturn V (or S5), Rhea is 950 mi (1530 km) in diameter, orbits Saturn at a mean distance of 327,487 mi (527,...

surface tension

(Encyclopedia)surface tension, tendency of liquids to reduce their exposed surface to the smallest possible area. A drop of water, for example, tends to assume the shape of a sphere. The phenomenon is attributed to...

chromosphere

(Encyclopedia)chromosphere krōˈməsfērˌ [key] [Gr.,=color sphere], layer of rarefied, transparent gases in the solar atmosphere; it measures 6,000 mi (9,700 km) in thickness and lies between the photosphere (th...

Amtrak

(Encyclopedia)Amtrak, the National Railroad Passenger Corp., authorized to operate virtually all intercity passenger railroad routes in the United States. Amtrak was created by Congress in 1970 in response to more ...