ellipticity


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ellipticity

See oblateness.
Collins Dictionary of Astronomy © Market House Books Ltd, 2006

ellipticity

[ē‚lip′tis·əd·ē]
(astronomy)
The difference between the equatorial and polar radii of a planet divided by the mean radius.
(electronics)
(mathematics)
Also known as oblateness.
For an ellipse, the difference between the semimajor and semiminor axes of the ellipse, divided by the semimajor axis.
For an oblate spheroid, the difference between the equatorial diameter and the axis of revolution, divided by the equatorial diameter.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
References in periodicals archive ?
Using the [V.sub.0h] ellipticity (2.11) and the boundedness estimate (2.13) as well as the consistency (2.17), we obtain
Scherbaum, "Love's formula and H/V-ratio (ellipticity) of Rayleigh waves," Wave Motion.
With increasing concentrations of the Ag(I) compounds, the CD signal exhibits significant changes in ellipticity, and this change corroborates with the binding of the compounds with the HSA backbone (spectra 2-6, Figure 8).
In order to check whether this cross-polarized transmission corresponds to a rotation of the polarization plane (electromagnetic activity) or a change to elliptical polarization (circular dichroism), the rotation angle and ellipticity of the transmitted wave were computed, the results being shown in Figure 7.
Wang, "Decay rates of solutions to dissipative nonlinear evolution equations with ellipticity," Zeitschrift fur angewandte Mathematik und Physik ZAMP, vol.
Each CP mode has different orientation and ellipticity angles, which describe the transmitted and received wave status.
The simulated polarization azimuth rotation angle ([theta]) and polarization ellipticity angle (rj) for the normal incident y-polarized wave propagation along the backward (-z) direction.
The interrelation between Rayleigh waves and the HVSR can be shown on the basis of comparison between the HVSR and an ellipticity curve.
4, the hodographs of this magnetic field are close to a circle, so that the coefficients of the ellipticity of the soil are equal to unity, and hence this MF is strongly polarized.
Laser spot size (major and minor diameters and area) and ellipticity (ratio of the major to minor diameter) were measured from fundus photographs taken from all quadrants 5 minutes after the procedure.
All the antibodies displayed a similar shape of the fluorescence curve with a peak between 320 and 340 nm (Figure 5(a)) and showed similar CD spectra, with a negative peak at 218 nm, consistent with the [beta]-sheet found in the immunoglobulin protein folding and an obvious ellipticity minimum of the negative peak at 230 nm as described for some VL domains [31], an indication of complete folding (Figure 5(b)).