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Institution

Westinghouse Electric

CompanyCranberry Township, Pennsylvania, United States
About: Westinghouse Electric is a company organization based out in Cranberry Township, Pennsylvania, United States. It is known for research contribution in the topics: Brake & Circuit breaker. The organization has 27959 authors who have published 38036 publications receiving 523387 citations.


Papers
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Patent
26 Aug 1991
TL;DR: In this paper, a linear FM waveform generator employs direct digital synthesis and includes a digital linear FM signal generator, a digital-analog converter, and a sampler means, all of which operate off a system clock.
Abstract: A linear FM waveform generator employs direct digital synthesis and includes a digital linear FM signal generator, a digital-analog converter, and a sampler means. The linear FM waveform generator includes a frequency slope register coupled to a first stage integrator which in turn is coupled to a second stage integrator, all of which operate off a system clock. The output signal from the second stage integrator represents phase as a quadratic function of time. A stored sine look-up table is referenced to generate an output digital signal representing amplitude as a function of time. The output digital signal is converted to an analog linear FM waveform which in turn is coupled to a sampler that includes a step recovery diode and a fast switch. The sampler aperture is sufficiently small that the sampler output linear FM waveform includes base and higher harmonic spectra with amplitude attenuation small enough to enable a third or higher harmonic spectra to be used for generation of the output linear FM waveform. The sampler output is filtered to pass a higher harmonic spectra which is directly coupled to output multiplication and filter circuitry.

73 citations

Journal ArticleDOI
TL;DR: In this paper, the minimum heat flux in film boiling from a horizontal surface is definitely a type of Taylor hydrodynamic instability, and a new experimental technique was developed for obtaining film boiling on a large area without the necessity of using huge heat fluxes to go over the peak of the boiling curve.
Abstract: >Film boiling is studied for water and Freon-11 (CCl₃F) at atmospheric pressure on a flat horizontal aluminum heating surface 8 in. square. High speed motion pictures were taken from which interbubble distances, bubble periods, breakoff diameters, and geometric arrangement of bubbles were determined. The results show that the minimum heat flux in film boiling from a horizontal surface is definitely a type of Taylor hydrodynamic instability. A new experimental technique was developed for obtaining film boiling on a large area without the necessity of using huge heat fluxes to go over the peak of the boiling curve. Once film boiling was established, the film boiling region could be traversed by changing the heat output from the gas burner beneath the slab. (auth)

73 citations

Journal ArticleDOI
J. Murphy1
TL;DR: In this article, two simple defect models are discussed, in which a paramagnetic ion tunnels between two stable positions, and in the second, the ion is trapped in a one-dimensional square well.
Abstract: In the usual treatment of the temperature dependence of spin-lattice relaxation of impurity ions, the vibrational properties of the paramagnetic ion are assumed to be those of a normal host ion. For impurities that do not affect the vibrational properties of the lattice, this is expected to be a resonable approximation. However, if a paramagnetic impurity is associated with a gross defect in a crystal, it should be expected that the temperature dependence of the spin-lattice relaxation time will be dominated by the vibrational properties of the defect. An ion could be trapped at a site about which the potential is highly anharmonic and such that the vibrational amplitude is very large and effectively independent of the state of excitation. Under these circumstances lattice vibrations whose amplitudes have the usual temperature dependence could beat with the vibrations of the defect, producing a difference frequency resulting in a spin transition. In the high-temperature limit one would expect a spin transition rate that is proportional to $T$ rather than to ${T}^{2}$ because only the lattice-vibration part of the interaction is temperature-dependent and at high temperatures this dependence is linear. In this paper two simple defect models are discussed. In the first, a paramagnetic ion tunnels between two stable positions, and in the second, the ion is trapped in a one-dimensional square well. In the tunneling model, the form of the temperature dependence is independent of the details of the spin-lattice interaction, whereas the square-well results are sensitive to these details. In the latter case, the effect of electric and magnetic interactions is discussed. Recent measurements by Feldman, Castle, and Wagner of the spin-lattice relaxation time of hydrogen centers in fused quartz exhibit the behavior described by either of these models, but their data can be fitted better by the square-well model.

73 citations

Journal ArticleDOI
TL;DR: In this paper, radio noise measurements made near overhead power lines from 2.4 to 345 kV in the frequency range of 60 Hz to 1 GHz and on radio noises measurements made on 7.2, 345, 525, 735, and 765kV ac lines and on an 800-kV dc test line up to 10 GHz.
Abstract: This paper presents radio noise measurements made near overhead power lines from 2.4 to 345 kV in the frequency range of 60 Hz to 1 GHz and on radio noise measurements made on 7.2, 345, 525, 735, and 765-kV ac lines and on an 800-kV dc test line up to 10 GHz. The measurements and their analysis show the important radio noise factors involved in the development and use of prediction techniques for the evaluation of communication site performance in the vicinity of overhead power lines.

73 citations

Patent
Dave Huber1
16 Jul 2002
TL;DR: An integrated gasification power generating system (100) includes an oxygen separator (1) for providing an oxygen rich gas stream (2 ) from an oxygen containing gaseous mixture such as air as mentioned in this paper.
Abstract: An integrated gasification power generating system ( 100 ) includes an oxygen separator ( 1 ) for providing an oxygen rich gas stream ( 2 ) from an oxygen containing gaseous mixture such as air ( 13 ). The oxygen separator ( 1 ) provides an oxygen stream ( 2 ) preferably including at least 99% oxygen. The system includes a gasifier ( 25 ) for generating a synthesis gas and a combustor ( 21 ) for combusting a mixture including the oxygen rich gas stream ( 20 ), a steam flow ( 23 ) and the synthesis gas ( 22 ) or a product derived therefrom, to produce thermal energy.

73 citations


Authors

Showing all 27975 results

NameH-indexPapersCitations
Takeo Kanade147799103237
Martin A. Green127106976807
Shree K. Nayar11338445139
Dieter Bimberg97153145944
Keith E. Gubbins8546635909
Peter K. Liaw84106837916
Katsushi Ikeuchi7863620622
Mark R. Cutkosky7739320600
M. S. Skolnick7372822112
David D. Woods7231820825
Martin A. Uman6733816882
Michael Keidar6756614944
Terry C. Hazen6635417330
H. Harry Asada6463317358
Michael T. Meyer5922526947
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Performance
Metrics
No. of papers from the Institution in previous years
YearPapers
20231
202217
202135
202063
201946
201860