To investigate the effect of quiz frequency on the course performance of Iranian university students of English, the mean scores of five groups of subjects were compared using a balanced one-way ANOVA procedure. Analyses revealed that quizzes significantly improve course performance. With some exceptions, it was also found that the more frequently the subjects were quizzed, the better their cou...

Background and Objective: Consanguinity increases the incidence of genetic disorders. The frequency of consanguinity varies in different societies. There was no data regarding the frequency of consanguinity in Zanjan province. This study aimed to describe the prevalence of consanguineous unions in the parents of children with genetic disorders and its related factors in Zanjan, Iran. Materials...

In this paper, the dynamic response of resonating nano-beams is investigated using a strain gradient elasticity theory. A nonlinear model is obtained based on the Galerkin decomposition method to find the dynamic response of the investigated beam around its statically deflected position. The mid-plane stretching, axial residual stress and nonlinear interaction due to the electrostatic force on ...

A review of time-frequency analysis and some aspects of its applications in digital watermarking are presented. The main advantages and drawbacks of various time-frequency distributions are first discussed. The aim of this theoretical overview is to facilitate an appropriate distribution selection in a specific application. Different aspects of the time-frequency analysis when applied to digita...