Results 291 to 300 of about 20,548 (312)
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Electrical Engineering, 1947
Beyond the facts that they recur in welldefined cycles and that they affect certain of the earth's latitudes more than others, little but theoretical knowledge exists about the nature of sunspots and the sometimes concomitant magnetic storms. However, almost inadvertently, modern telegraph systems are being immunized against them by such innovations as
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Beyond the facts that they recur in welldefined cycles and that they affect certain of the earth's latitudes more than others, little but theoretical knowledge exists about the nature of sunspots and the sometimes concomitant magnetic storms. However, almost inadvertently, modern telegraph systems are being immunized against them by such innovations as
openaire +2 more sources
Journal of the American Institute of Electrical Engineers, 1922
The history of the development of the subject is first outlined, and methods of operation of cables are described. The technical side is introduced with a statement of the various conditions whi h limit operation of cables, and a general method of analysis is developed, based upon an extension of ordinary alternating-current theory.
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The history of the development of the subject is first outlined, and methods of operation of cables are described. The technical side is introduced with a statement of the various conditions whi h limit operation of cables, and a general method of analysis is developed, based upon an extension of ordinary alternating-current theory.
openaire +2 more sources
Submarine Telegraphy and the Hunt for Gutta Percha: Challenge and Opportunity in a Global Trade
, 2018H. Godfrey
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Discoveries and Inventions of the Twentieth Century, 2018
Edward Cressy
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Edward Cressy
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