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The statistics of disordered phenomena as exemplified by Einstein's theory of the Brownian motion is applied to the flow of fluids through porous media. It is shown that such a statistical treatment of the hydrodynamics in porous media automatically explains some well‐known phenomena in a more...
New methods for determining the time fraction of coincidence of separate periodic pulse trains are considered. The analysis applies solely to pulse trains whose fundamental periods are commensurable. For two pulse trains, the coincidence fraction is easily determined. For three or more pulse...
A new capillary viscometer has been designed to study the flow behavior of non‐Newtonian fluids. The instrument is convenient, absolute, and accurate, and covers continuously a wide shearing stress range in a single determination. A falling mercury column forces the sample through the...
In certain applications it is necessary to measure the center frequency of a symmetrical power spectrum in the shortest possible time. Two instrumentations for short‐time frequency measurement, the autocorrelator and the frequency discriminator, are examined for their ability to accomplish this...
It is proposed that if I max and I min are the maximum and minimum noise currents in a noise standing wave on an electron stream, then the product of their magnitudes cannot be smaller than ∣ I max ∣ ∣ I min ∣ = α e I 0 B ( ω ω q ) ( k T c e V 0 ) .Various assumptions lead to a factor...
The frequency response of a typical resistance‐capacitance coupled voltage amplifier has been theoretically analyzed and the result compared with that given by Terman. The advantages and disadvantages of the two methods have been illustrated both mathematically and graphically. A solution to...
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