نتایج جستجو برای: some schools were randomly selected then
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in this study, the effects of oleothermal modification on physical and mechanical peroperties of fir wood (abeis sp.) blocks were examined. at first, some blocks of fir wood with 5 × 20 × 120 cm dimensions were prepared. the blocks were treated in soybean oil. the effects of 3 factors such as treatments temperature (180and 200 °c), holding time (12 and 15 h) and initial moisture content of wood...
iv abstract this study examined the linguistic behaviors of two iranian efl teachers each of them teaching learners of two similar proficiency levels, a beginner level and an intermediate level, to investigate the relationship between the learners proficiency levels and the amounts and purposes for l1 use by the two teachers. the study was carried out to investigate whether there were differe...
there are two major theories of measurement in psychometrics: classical test theory (ctt) and item-response theory (irt). despite its widespread and long use, ctt has a number of shortcomings, which make it problematic to be used for practical and theoretical purposes. irt tries to solve these shortcomings, and provide better and more dependable answers. one of the applications of irt is the as...
The present study examines the effect of conversation based on philosophical stories in the community of inquiry on the reduction of the signs of anxiety disorders in the children between 11 and 12 of Tehran. This semi-empirical study was conducted in terms of test and control groups. The participants of the study consisted of all fifth and sixth grade students of public schools of Tehran (n=50...
background: to determine the mean eruption time of permanent teeth of pakistani children and to evaluate the effects of gender, type of schools, height, weight and body mass index on it. methods: this cross sectional study was conducted from september 2007 to april 2008. 4370 children of ‘just erupted' teeth were obtained from 102 randomly selected schools from 18 towns of karachi, using syste...
Obesity is on the rise in developing countries, especially in urban areas. In this study, a crosssectional study was conducted in two divisions in Nairobi province to determine the prevalence of and some risk factors associated with overweight and obesity among school children in Nairobi, Kenya. It involved 344 school children aged 9 14 years drawn from four randomly selected public and private...
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