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Author:
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ISBN:
Category : Aeronautics
Languages : en
Pages : 1074
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Author:
Publisher:
ISBN:
Category : Aeronautics
Languages : en
Pages : 1074
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Author: E. A. Lewis
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ISBN:
Category : Atmospheric electricity
Languages : en
Pages : 50
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Book Description
Very narrow-band quenched filters used for studying VLF radio signals differ from conventional narrow-band circuits in that both signal and atmospheric noise impulses cause only brief quasi-sinusoidal outputs instead of a prolonged ringing. The random overlapping of these short noise and signal bursts can cause errors in phase measurements. It is shown that the distribution of phase errors can be calculated from the amplitude distribution of the output noise envelope. The properties of the phase distribution are discussed in detail, the computation required in the general case is illustrated by means of a numerical example. A simple 'time-sequential' method for experimentally obtaining typical amplitude distributions is suggested. (Author).
Author: R. L. Komack
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ISBN:
Category : Electric fields
Languages : en
Pages : 14
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Author: Ronald G. Newburgh
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ISBN:
Category : Absorption
Languages : en
Pages : 34
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The Wheeler-Feynman absorber theory of radiation is reviewed. A proof is offered to show that a sum of advanced and retarded effects from the absorber can provide the origin of radiative reaction. This proof is different from and perhaps simpler than that of Wheeler and Feynman. From arguments of momentum and energy conservation the necessity of the absorber for the emission of radiation is demonstrated for three cases. (Author).
Author: F. V. Schultz
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ISBN:
Category : Boundary value problems
Languages : en
Pages : 14
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In this work, rigorous electromagnetic theory is used to determine the nose-on radar cross section of a perfectly conducting cone of finite height. The end cap of the cone is assumed to be a segment of a s spherical surface with center at the apex of the cone. Numerical results have been obtained for a cone having a total apex angle of 30 degrees and for values of [kappa alpha] ranging from 0.0259 to 5.18, where [kappa]=2 [pi]/[lambda] and [alpha] is the radius of the base of the cone. Siegel's Rayleigh method and by using Keller's modified geometrical optics as well as with experimental results obtained by Keys. The comparisons are instructive below [kappa alpha] = 3.2, the apparent upper limit of validity of the present results -- p.[3].
Author: Richard Payne
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ISBN:
Category : Anions
Languages : en
Pages : 28
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A theory of hydromagnetic ionizing waves has been developed which is valid in the region in which gas pressure is negligible, compared with magnetic pressure. The theory takes into account the energy expended in partial ionization of the gas behind the wave. The usual high conductivity boundary condition behind the wave is not employed. The electric field in front of the wave is taken as a parameter. Results of this theory are compared with available experimental measurements, and show good agreement. (Author).
Author: Kendrick N. Hemmenway
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ISBN:
Category : Precious stones, Artificial
Languages : en
Pages : 14
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Author: Charles F. Hobbs
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ISBN:
Category : Error analysis (Mathematics)
Languages : en
Pages : 14
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Author: T. V. Griffiths
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ISBN:
Category : Algorithms
Languages : en
Pages : 22
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A number of diverse recognition procedures that have been proposed for parsing sentences with respect to a context-free grammar are described in this paper by means of a common device. Each procedure is defined by giving an algorithm for obtaining a nondeterministic Turing Machine recognizer that is equivalent to a given context-free grammar. The formalization of the Turing Machine has been chosen to make possible particularly simple descriptions of the parsing procedures considered.
Author: K. U. Sivaprasad
Publisher:
ISBN:
Category : Magnetostatics
Languages : en
Pages : 34
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