LYCOS RETRIEVER 
Alternating Current
built 238 days ago
Alternating Current was commissioned by Young Concert Artists, Inc. for pianist Jeremy Denk and made possible through a generous grant from Ernest Levenstein. It was premiered on February 9, 1998 at the Kennedy Center, Washington D.C.
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Alternating current delivered into the scala media of the gerbil cochlea modulates the amplitude of a test tone measured near the eardrum. Variations in the electromechanical effect with acoustic stimulus parameters and observed physiological vulnerability suggest that cochlear hair cells are the biophysical origin of the process. Cochlear hair cells have traditionally been thought of as passive receptor cells, but they may play an active role in cochlear micromechanics.
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Several EAFs are operated by direct current (DC) instead of alternating current (AC). DC furnaces normally have only one very large electrode extending through the centre of the roof, with the counter electrode embedded in the furnace bottom and contacting the melt. A hot heel is kept in the furnace to ensure a good current flow through the charge.
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When a single-phase alternating current is rectified in the simplest manner, the reverse half of the cycle is blocked out entirely. The result is a pulsating unidirectional current with intervals when no current at all is flowing. This is often referred to as “half-wave” or as pulsating direct current.
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Charles Proteus Steinmetz was a giant of a pioneer in the field of electrical engineering, who invented a commercially successful alternating current motor. Only four feet tall in real life, his middle name Proteus, was named after the Greek god who could take on any shape or size.
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Alternating Current