Abstract: The paper discusses the operating characteristics of large commutators. It is pointed out that many cases of blackened and burned bars are caused initially by a slight roughness which causes ...
Derivation of equal time commutators involving the symmetric energy-momentum tensor and applications
The use of covariance and the Jacobi identity in the study of equal-time commutators is investigated. Denoting by Tμν the conserved and symmetric tensor density of Poincaré transformations and by X ...
If you enjoyed this article, I’d like to ask for your support. Scientific American has served as an advocate for science and industry for 180 years, and right now may be the most critical moment in ...
MY attention has been drawn to a note in NATURE of January 11 (p. 253) which quotes from the Electrical World of New York “a novel method of obtaining sinusoidal alternating currents of very low ...
The first type of motor built is still in widespread use In the late 1800s, several inventors built the first working motors, which used direct current (DC) power. After the invention of the induction ...
Edited by* Robion C. Kirby, University of California, Berkeley, Berkeley, CA, and approved July 13, 2012 (received for review February 15, 2012) The second fact is a heavy theorem of Bourgain and ...
RECENT advances in the application of single-phase alternating currents to electric traction have given rise to a large volume of literature dealing chiefly with the motors employed. The possibility ...
Inflation fell to its lowest level in 3-and-a-half years in August, clearing the way for the Federal Reserve to start cutting interest rates next week. Consumer prices in August were up 2.5% from a ...
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