Factor analysis is a standard tool in educational testing contexts, which can be fit using the EM algorithm (Dempster, Laird and Rubin (1977)). An extension of EM, called the ECME algorithm (Liu and Rubin (1994)), can be used to obtain ML estimates more efficiently in factor analysis models. ECME has an E-step, identical to the E-step of EM, but instead of EM’s M-step, it has a sequence of CM (...

purpose: to compare the effectiveness of pencil pushup training (ppt) versus office-based vision therapy in patients with convergence insufficiency. method: sixty students of zahedan medical university with convergence insufficiency were randomly selected. after determining refractive error (by retinoscopy using cyclopentolate 1%, if needed), near point of convergence (by millimeter ruler), nea...

This paper has examined the phenomenon of convergence of per capita out put levels across the IC countries for the 1960-1998 periods. Three concepts of convergence, i.e., sigma beta and relative beta, have been used. The estimated beta values reveals only a very weak convergence (?=.0014) across IC for 1960-1998 period. But when a more homogeneous group of countries were selected, the results s...

This work considers the implementation of recursive identification algorithms based on hyperstability concepts with polyphase structures. It is shown that the SPR condition required for convergence of these schemes can always be met by using a sufficiently high polyphase expansion factor M . For a given M , the degree of persistent excitation required for parameter convergence is obtained. When...

In the paper the potential fluid flow problem in porous media using the Darcy’s law and the continuity equation is solved. Mixed-hybrid finite element formulation based on general trilateral prismatic elements is considered. Spectral properties of resulting symmetric indefinite system of linear equations are examined. Minimal residual method for the solution of systems with a symmetric indefini...

where m = f f is a unimodal function with mode m . In this paper, we establish almost sure convergence of (1.2) with optimal convergence rates up to a logarithmic factor, under the assumption of the exponential tail for the error distributions. Suppose throughout the sequel that Xi are iid random variables from a continuous distribution GX such that the density G ′ X exists in a neighborhood of...