Dispersion

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Dispersion

In statistics, the placement of data points along a chart relative to an average or mean line. Dispersion is important to finance as the data points of say, a stock, determine the mean, which in turn helps determines the stock's trend. Dispersion is also used to determine volatility: data points all over the chart indicate that a stock has wild fluctuation in price.
References in periodicals archive ?
Wallman, "Chick eyes compensate for chromatic simulations of hyperopic and myopic defocus: evidence that the eye uses longitudinal chromatic aberration to guide eye-growth," Vision Research, vol.
As the part of the body where color synthesis occurs, the eye plays a significant role in the form and content of Chromatic Aberration. Quite fittingly, when installed this past fall in the Gallery at Tyneside Cinema, the work was projected onto a screen that hung from the ceiling and mirrored the curvature of the human eye.
Since only the chromatic aberration is present, the full power of an optimizer can be dedicated for color correction.
(iii) It must be also taken into account that the wavelength range selected determines the maximum linear chromatic aberration (LCA) within the operation range that corresponds to the difference of focal distances:
The objectives in the on-board measuring equipment of a UAV must function free of chromatic aberration across a wide spectral range - from the ultraviolet region through the visible band and right up to the near and medium infrared range.
Parameters for characteristics such as diffraction efficiency, signal-to-noise ratio and chromatic aberration are defined for labels, hot-stamping foils, un-coated and coated films and holographic papers, for some materials allowing level A and level B grading.
It has been postulated that the pigment might serve to reduce chromatic aberration and to improve visual acuity.
The VHX-600 Digital Microscope has a 54 mega-pixel 3-CCD mode camera and a selection of high-resolution RZ optical design zoom lenses with up to 5,000x magnification that provide chromatic aberration correction.
A 54 mega-pixel 3CCD mode camera and a wide selection of high-resolution RZ optical design zoom lenses with up to 5000X magnification are said to provide excellent chromatic aberration correction and superior image quality.
With an Abbe value higher than 50--greater than those of thermoplastics such as polycarbonate and polyester, says Fosta-Tek--the new transparent olefins yield products with low chromatic aberration. Moreover, their index of refraction--1.53--is closer to that of crown glass than other thermoplastics; thus, their use in place of glass requires minimal design changes.
It excels at correcting chromatic aberration and curvature of the field of view, plus it offers longer working distances and higher numerical apertures.
As for image quality, it still suffers from chromatic aberration" and shows various instances of purple fringing, even in low-contrast situations.