Fast radio burst (FRB) dispersion measures (DMs) record the presence of ionized baryons that are otherwise invisible to other techniques enabling resolution matter distribution in cosmic web. In this work, we aim estimate contribution FRB 180924 DM from foreground galactic halos. Localized by ASKAP a massive galaxy, sightline is notable for an estimated web (DMcosmic =220 pc cm−3), which less t...

Fast radio burst (FRB) discoveries are occurring rapidly, with thousands expected from upcoming surveys. The dispersion measures (DM) observed for FRB include important information on cosmological distances and the ionization state of universe redshift emission until today. Rather than considering DM--redshift relation, we investigate statistical ensemble distribution measures. We explore use t...

Generalized variance is applied for determination of dispersion in a multivariate population and is a successful measure for concentration of multivariate data. In this article, we consider constructing confidence interval and testing the hypotheses about generalized variance in a multivariate normal distribution and give a computational approach. Simulation studies are performed to compare thi...

We present a simple fiber-based single-arm spectral interferometer to measure directly the second-order dispersion parameter of short lengths of fiber (< 50 cm). The standard deviation of the measured dispersion on a 39.5-cm-long SMF28(TM) fiber is 1x10(-4) ps/nm, corresponding to 1% relative error, without employing any curve fitting. Our technique measures the second-order dispersion by exami...

The distribution of galaxies in position and velocity around the centers of galaxy clusters encodes important information about cluster mass and structure. Using the maxBCG galaxy cluster catalog identified from imaging data obtained in the Sloan Digital Sky Survey, we study the BCG–galaxy velocity correlation function. By modeling its non-Gaussianity, we measure the mean and scatter in velocit...

In this paper we apply number-theoretic results to estimate the dispersion, a measure of denseness for sequences in a bounded set, of the Halton and Hammersley sequences in the hypercube 7s = [0, if . It is seen that they attain the minimal order of magnitude for the dispersion.

We present theoretical and experimental results for c field amplified sample stacking (FASS). We use an acid coating to minimize dispersion due to EOF. We mod dimensional electromigration and dispersion of two bac sample ion across an initial concentration gradient. Regu to solve for the concentration fields. Also, we use CCDfluorescence imaging to experimentally measure the u validate the model.