A robust method for measuring the Hubble parameter

A New Method for the Determination of the Hubble Parameter

X iv : a st ro - p h / 99 08 34 3 v 1 3 1 A ug 1 99 9 A robust method for measuring the Hubble parameter

We obtain a robust, non-parametric, estimate of the Hub-ble constant from galaxy linear diameters calibrated using HST Cepheid distances. Our method is independent of the parametric form of the diameter function and the spatial distribution of galaxies and is insensitive to Malmquist bias. We include information on the galaxy rotation velocities ; unlike Tully-Fisher, however, we retain a fully...

A New Method for Measuring the Angle of Hallux Valgus

Objectives. The aim of this study is to introduce a new way and assign its reliability and validity in measuring the angle of hallux valgus. Methods. In this method, we have proceeded to introduce a simple way for measuring the angle of hallux valgus by using ruler and mathematical formulas. For doing this study, we selected 25students and measured their angle of hallux valgus with new way ...

A Grassmann Representation of the Hubble Parameter

The Riccati equation for the Hubble parameter H of barotropic FRW cosmologies in conformal time for κ 6= 0 spatial geometries and in comoving time for the κ = 0 geometry, respectively, is generalized to odd Grassmannian time parameters. We obtain a system of simple differential equations for the four supercomponents (two of even type and two of odd type) of the Hubble superfield function H that...

A Parameter Robust Method for Singularly Perturbed Delay Differential Equations

Uniform finite difference methods are constructed via nonstandard finite difference methods for the numerical solution of singularly perturbed quasilinear initial value problem for delay differential equations. A numerical method is constructed for this problem which involves the appropriate Bakhvalov meshes on each time subinterval. The method is shown to be uniformly convergent with respect t...