Results 261 to 270 of about 173,503 (312)

Invariants of electromechanical coupling coefficients in piezoceramics

IEEE Transactions on Ultrasonics, Ferroelectrics and Frequency Control, 2003
The relationships between coefficients of electromechanical coupling (CEMC) of various types of piezoceramic resonator (PR) vibrations are considered. Being constant for a given piezoceramic state, the range of variation of piezoceramics dielectric permittivity from a mechanically "free" condition at relatively low frequencies up to an "overall clamped"
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Determination of electrokinetic coupling coefficients

SEG Technical Program Expanded Abstracts 2005, 2005
Electrokinetic coupling can convert an electromagnetic wave into a seismic wave or a seismic wave into an electromagnetic wave and is the basis of a new exploration method called Coupled Waves (Thompson and Gist (1993 and 1999), Hornbostel and Thompson (2002), Hornbostel, et al. (2003), and Ross et al. (2005)).
Harry Deckman, Eric Herbolzheimer, Arnold Kushnick   +2 more
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The Determination of Mode Coupling Coefficients

Optica Acta: International Journal of Optics, 1985
Analytical expressions for coupling coefficients for oblique incidence on a grating with an arbitrary groove profile on a planar waveguide with an arbitrary refractive index profile are obtained in the form of mode eigenfunctions values on the waveguide surface.
E. Popov, L. Mashev
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Corrugated Grating Coupled Devices and Coupling Coefficients

Integrated Optics, 1976
Marcuse has used local normal mode theory to calculate general expressions for the coupling coefficients (distributed leakage - DL and distributed feedback - DFB) for asymmetric slab waveguides with corrugated core boundaries.1 This approach and in general most approaches to this problem2,3,4 do not give one much feeling for the workings of the ...
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Feedback reactivity coefficients and their coupling

Nuclear Engineering and Design, 2007
Abstract Coupled reactivity feedback coefficients which accounts for variation in fuel temperature and moderator void simultaneously, have been determined for swimming pool type research reactor namely Pakistan Research Reactor PARR-1. The state of art is core criticality calculations, employing lattice cell code WIMS-D/4 and application of Taylor ...
Rustam Khan, Tehsin Hamid, Sabiha Bakhtyar   +2 more
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An Approximation to the Asymmetric Strip-Line Coupling Coefficient

IEEE Transactions on Computers, 1968
Abstract—In the design of magnetic film memories and high-speed printed wiring systems, it is often necessary to estimate the coupling between adjacent conductors which are, in effect, strip lines with asymmetric ground planes. No solution to this problem exists in the literature. An heuristic approximation is found, and validated experimentally, which
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Rate coefficients in reacting strongly coupled plasmas

Physical Review A, 1988
A kinetic approach is derived to take into account nonideality effects in the rate coefficients of plasmas. First results are given for a reacting hydrogen plasma.
, Schlanges, , Bornath, , Kremp
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Coupling coefficients for space groups

Journal of Mathematical Physics, 1979
Unitary matrices connecting coupling with their corresponding Clebsch–Gordan coefficients are determined quite generally for nonsymmorphic space groups which contain the inversion as point group operation. The matrix elements of these unitary matrices factorize into two independent parts where a special choice for the sets of the left coset ...
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Coupling coefficients for trapezoidal gratings

IEEE Journal of Quantum Electronics, 1988
Using coupled-mode theory, the coupling coefficient was calculated for a trapezoid grating, and it was shown that it is possible to adjust its shape to obtain a high coupling coefficient. This is one of the advantages offered by the ion beam etching technique. >
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Mode coupling coefficient measurements in optical fibers

Applied Optics, 1978
The measuring method of the mode coupling coefficient was developed to apply to multimode fibers. It is shown that a mode coupling coefficient can be calculated from each mode group pulse waveform. Measurements were made with two cases of long-length and short-length multimode step-index fibers.
K, Kitayama, M, Ikeda
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