9 Few bacterial cells may be sufficient to produce a food-borne illness outbreak, provided that 10 they are capable of adapting and proliferating on a food matrix. This is why any quantitative 11 health risk assessment policy must incorporate methods to accurately predict the growth of 12 bacterial populations from a small number of pathogens. In this aim, mathematical models 13 have become a p...

The Effects of Population Growth on Quantitative Indices of Education in Iran: The Prospects of Student Population up to 2030 M. Amiri In recent years, population experts have started to add the “level of education” as a variable to their demographic analyses. To analyze the dynamics of the student population and its prospects for the next 15 years, factors such as number ...

We present the frailtyHL package for fitting semi-parametric frailty models using hlikelihood. This package allows lognormal or gamma frailties for random-effect distribution, and it fits shared or multilevel frailty models for correlated survival data. Functions are provided to format and summarize the frailtyHL results. The estimates of fixed effects and frailty parameters and their standard ...