OBJECTIVE To describe the characteristics, working conditions, and occupational health situation of immigrant workers in Spain through key informants. METHOD We performed a qualitative, exploratory and descriptive study using indepth interviews carried out in 2006. Organizations and associations working with immigrant collectives in Alicante, Barcelona, Huelva, Madrid and Valencia were identi...

A prey–predator system with logistic growth of prey and hunting cooperation predators is studied. The introduction fractional time derivatives the related persistent memory strongly characterize model behavior, as many dynamical systems in applied sciences are well described by such fractional-order models. Mathematical analysis numerical simulations performed to highlight characteristics propo...

This article compares different approaches for estimating cross-lagged effects with a panel design under causal inference perspective. We distinguish between models that rely on no unmeasured confounding (i.e., observed covariates are sufficient to remove confounding) and latent variable-type (e.g., random intercept model) use parametric assumptions adjust time-invariant by including additional...

This study was conducted to extract first, the underlying factors of Home Culture Attachment Scale (HCAS) and second, to confirm these factors via Structural Equation Modeling (SEM) analysis. To meet this end, the scale was distributed to 374 English language learners in private language institutes in Mashhad, Iran. To determine the construct validity of the scale, Exploratory Factor Analysis (...