GLOBAL STABILITY AND BIFURCATIONS ANALYSIS OF AN EPIDEMIC MODEL WITH CONSTANT REMOVAL RATE OF THE INFECTIVE

In this thesis we consider an epidemic model with a constant removal rate of infective individuals is proposed to understand the effect of limited resources for treatment of infective on the disease spread. It is found that it is unnecessary to take such a large treatment capacity that endemic equilibria disappear to eradicate the disease. It is shown that the outcome of disease spread may depend on the position of the initial states for certain range of parameters. It is also shown that the model undergoes a sequence of bifurcations including saddle-node bifurcation, subcritical Hopf bifurcation. Keyword: Epidemic model, nonlinear incidence rate, basic reproduction number, local and global stabilit

A simple method for procrustean rotation in factor analysis using majorization theory

The essential idea in all analytical rotation schemes for approximating Thurstone's simple structure is to split the factor loadings into two groups, the elements of the one tending toward zero, and of the other, toward unity. In the PROMAX method, the loadings of a preliminary factor pattern are raised to a fixed power to provide a target for Procrustean rotation. In this article, a mathematically better-motivated technique based on vector majorization is proposed for this purpose. The method is illustrated with several standard numerical examples

A k-sample significance test for independent alpha coefficients

reliability, internal consistency, comparison of reliability coefficients,