background: scenes depicting smoking are among the causes of smoking initiation in youth. the present study was the first in iran to collect some primary information regarding the presence of smoking scenes in movies and propagation of tobacco use. methods: this cross-sectional study was conducted by polling audience about smoking scenes in persian movies on theaters in 2011. data were collecte...

introduction: clinical policies of “10 steps of breast feeding” proposed by world health organization (who) can promote breast feeding. the goal of this study was to evaluate breast feeding in the first hour after birth and its relation to the influencing factors. material and methods: in this cross-sectional study, the data is related to mothers and infants referring to two baby friendly hospi...

The aim of this work is to perform a detailed analysis the cracks paths obtained in fretting fatigue tests with cylindrical contact but taking into account presence an unavoidable (due device’s stiffness) small oscillatory rolling. In order obtain crack surfaces were measured confocal microscope after tests. Besides, area and surface initiation location by means optical microscope. measurements...

The Brazilian test has been extremely popular while prompting significant debate. main source of controversy is rooted in its indirect nature; the material tensile strength inferred upon assuming that cracking initiates at centre sample. Here, we use Griffith criterion and finite element analysis to map conditions (jaws geometry properties) result nucleation a crack. Unlike previous studies, do...