in this paper, wavelet collocation method has been used to solve nonlinear fin problem with temperature dependent thermal conductivity and heat transfer coefficient. thermal conductivity of fin materials varies any type so that we consider thermal conductivity as the general function of temperature.  here we consider three particular cases, where we assume that thermal conductivity is constant,...

Recent cosmic microwave background (CMB) measurements over a large range of angular scales have become sensitive enough to provide interesting constraints on cosmological parameters within a restricted class of models. We use the CMB measurements to study inflation-based, cold darkmatter (CDM) critical density universes.We explore the 4-dimensional parameter space having as free parameters, Hub...

The distribution of the apparent total energy emitted by a gamma-ray burst reflects not only the distribution of the energy actually released by the burst engine, but also the distribution of beaming angles. Using the observed energy fluences, the detection thresholds and burst redshifts for three burst samples, I calculate the best-fit parameters for lognormal and power-law distributions of th...

The basic theory associated with standard variance-component models for QTL mapping in linkage analysis usually assumes multivariate normality. Robust score statistic based on the normality assumption has been proposed and showed to have the correct type-I error free of the true phenotypic distribution (Tang and Siegmund (2001)), however very low power has been observed when phenotypic distribu...

We propose a new method for calculating a tight approximation to the distribution of the sum of independent lognormal random variables. We use a three-parameter modified-power-lognormal distribution function as the approximating distribution. We use theoretical results from our previous work on the tails of the distribution of the sum of lognormals to match the slope of the modified-power-logno...