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Poldhu

(Encyclopedia)Poldhu pôldyo͞oˈ, pôlˈdyo͞o [key], town, Cornwall, SW England. Guglielmo Marconi sent the first transatlantic radio transmission (1901) from Poldhu to Newfoundland. ...

Biggs, E. Power

(Encyclopedia)Biggs, E. Power (Edward George Power Biggs), 1906–77, Anglo-American organist. Biggs studied at the Royal Academy of Music, London. He emigrated to the United States in 1930. Through many recitals, ...

cellular telephone

(Encyclopedia)cellular telephone or cellular radio, telecommunications system in which a portable or mobile radio transmitter and receiver, or “cellphone,” is linked via microwave radio frequencies to base tran...

modulation, in communications

(Encyclopedia)CE5 Modulation modulation, in communications, process in which some characteristic of a wave (the carrier wave) is made to vary in accordance with an information-bearing signal wave (the modulatin...

Levallois-Perret

(Encyclopedia)Levallois-Perret ləvälwäˈ-pĕrāˈ [key], residential and industrial suburb of Paris (1990 pop. 47,788), Hauts-de-Seine dept., N central France, on the Seine River. Automobiles, electrical and rad...

noise

(Encyclopedia)noise, any signal that does not convey useful information. Electrical noise consists of electrical currents or voltages that interfere with the operation of electronic systems. Electrical noise limits...

Oberlin, Russell Keys

(Encyclopedia)Oberlin, Russell Keys, 1928–2016, American countertenor, b. Akron, Ohio, grad. Juilliard, 1951. A boy soprano, he sang in his church choir and on the radio, and won a nationwide radio talent competi...

Hypsicles of Alexandria

(Encyclopedia)Hypsicles of Alexandria hĭpˈsĭklēz [key], astronomer of ancient Greece. Some authorities place Hypsicles in the 2d cent. b.c. and some in the 2d cent. a.d. The 14th and 15th books of Euclid's Elem...

Hawaii, University of

(Encyclopedia)Hawaii, University of, at Honolulu (Manoa Campus), Hilo, and Pearl City (West Oahu Campus) with additional community college campuses; land-grant and state supported; coeducational; chartered 1907, op...

Sigüenza y Góngora, Carlos de

(Encyclopedia)Sigüenza y Góngora, Carlos de kärˈlōs ᵺā sēgwānˈsä ē gōngˈgōrä [key], 1645–1700, Mexican writer and humanist. The foremost intellectual figure of colonial Mexico, he wrote on mathem...