background nowadays, work related stress appears to affect almost all people with connected clinical works. the purpose of this research was to study the relationships of work stress and work engagement with the satisfaction from lives of nurses in ahvaz governmental hospitals. material and methods a correlation study was carried out. nurses from governmental hospitals were selected and statist...

We examine analytically and numerically the evolution of a relativistic fireball. We show that, after an early rearrangement phase, most of the matter and energy in the fireball is concentrated within a narrow shell. The shell propagates at nearly the speed of light, with a frozen radial profile and according to a simple set of scaling laws. The spectrum of the escaping radiation is harder at e...

In recent years there has been a spate of pa­ pers describing systems for probabilisitic rea­ soning which do not use numerical probabil­ ities. In some cases the simple set of val­ ues used by these systems make it impossible to predict how a probability will change or which hypothesis is most likely given certain evidence. This paper concentrates on such situations, and suggests a number of w...

The unexpectedly high quadratic hyperpolarizability values of simple Ru and Pt alkynyl complexes have been measured by the EFISH technique, and this prompted us to investigate their potential as molecular building blocks for composite films with second harmonic generation properties.

In order to evaluate the genetic variation in Iranian summer savory accessions, different accessions were analyzed using multivariate and univariate analysis. Results indicated that there were significant differences in some traits. The mean comparison analysis using least significant difference (LSD) test revealed significant differences among the accessions understudy. In this regard, the hig...