this is an original study on the effect of a polyisobutylene – polydimethylsiloxane (pibpdms) block copolymer modifier used as an interfacial active agent on the dynamics behaviour of single newtonian drops suspended in a polyisobutylene (pib) newtonian matrix. the results were divided in two sections. the first part included the experiments carried out on the non-modified and 2% block cop...

Background: One of the criteria for measuring the performance of governments and their survival is the degree of success in reducing and stabilizing the misery index. The misery index is obtained from the sum of inflation and unemployment. Inflation and unemployment are the most important factors affecting family's income. If the misery index is high, families will have less money to buy their ...

previous studies regarding teachers’ beliefs have revealed that teachers’ beliefs have influence on their classroom practices. the current study aimed to investigate the effect of teachers’ beliefs about teaching reading strategies on students’ motivation and success in reading comprehension in the context of english teaching as a foreign language in high schools of mazandaran, iran. data were ...

writing as a productive skill requires practice in the basic sub-skills of vocabulary and grammar. in fact, grammar has been viewed as the core of programs in writing classes to help the students put the elements of sentence together and combine sentences of specific lengths to come up with an error-free work of art. conceptualizing l2 writing in this way introduces writing as a product and enc...

‏‎the hypothesis is that recent and frequent exposure to lexical items leads to a more fluent production of speech in terms of rate of speech. to test the hypothesis,a one-way anova experimental design was carried out. 24 sednior students of efl participated in a one-way interview test. data analyses revealed that those who were exposed frequently to the lexical items over a week prior to inter...

Objectives: Considering the growth of the elderly population and the need of the elderly for health services and the importance of supplementary insurance on improving the quality of life of the elderly households, this study aimed to investigate the effect of supplementary health insurance on out-of-pocket payments for elderly households in urban areas of Iran. Methods: this descriptive-analy...