Background and Aim: One of the most important factors to present successful managers is general health. If managers have not highly general health, then they will encounter many problems. Therefore, this research is aimed to induce the general health among Tehran University of Medical Sciences hospitals’ administrators.  Materials and Methods: A cross-sectional, deceptive and analytical...

the effect of the presence of perforations on he stresses of a plate is a problem which is of great interest in structural design and in the mathemattical theory of elasticity. among the many hole patterns that are likely to require consideration is the ring of equally spaced circular holes. the present worke investigates stress & strain analysis of a thin isotropic circular plate containing a ...

with the growth of more humanistic approaches towards teaching foreign languages, more emphasis has been put on learners’ feelings, emotions and individual differences. one of the issues in teaching and learning english as a foreign language is demotivation. the purpose of this study was to investigate the relationship between the components of language learning strategies, optimism, duration o...

Background and Aim: Recognition of expectations and perceptions of customers is essential for quality improvement . The aim of this study was to determine the quality gap of educational services in the viewpoints of Tehran University of Medical Sciences (TUMS) educational administrators, faculty members and medical students. Materials and Methods: A cross-sectional study was carried out at TUMS...

attempts have been made to study the thermodynamic behavior of 1,3 butadiene purification columns with the aim of retrofitting those columns to more energy efficient separation schemes. 1,3 butadiene is purified in two columns in series through being separated from methyl acetylene and 1,2 butadiene in the first and second column respectively. comparisons have been made among different therm...

this study investigates the cohesive devices used in the textbook of english for the students of psychology. the research questions and hypotheses in the present study are based on what frequency and distribution of grammatical and lexical cohesive devices are. then, to answer the questions all grammatical and lexical cohesive devices in reading comprehension passages from 6 units of 21units th...