Considering that the improvement of energy efficiency and the resulting rebound effect in the literature of energy economics is very important, hence the present paper uses the ARDL approach to estimate the direct rebound effect of the natural gas consumption in the residential sector in Iran. For this purpose, data from the period of 1986-2016 and the methodology based on the estimation of nat...

ددر این تحقیق استفاده از کربن اکتیو ، ذرات نانو مغناطیسی آهن و ذرات نانو کامپوزیت آهن- کربن اکتیو، برای حذف رنگ آنیونی از پسابهای سمی مورد مطالعه قرار گرفتند . رنگ direct orange -26 به عنوان مدلی از رنگ آنیونی مورد بررسی قرار گرفت. مشخصات سطحی نانو ذرات آهن و نانو کامپوزیت آهن توسط sem مورد بررسی قرار گرفت . تاثیر عوامل مختلف (ph ، دوز جاذب، زمان تماس، دور هم زدن) به روش طراحی آزمایش تاگوچی مور...

rested on sociocultural theory (sct), this study attempted to examine the effect of written corrective feedback (wcf) followed by producing written languaging on developing writing accuracy over new tasks. to this aim, two intact iranian efl classes at the low-intermediate level were randomly assigned to two experimental groups: direct (n = 25) and indirect (n = 25). both groups wrote on a numb...

current studies in second language (l2) learning have revealed the positive role of corrective feedback (cf) in both oral and written forms in different language features. the present study was an attempt to investigate the effect of both direct and indirect written corrective feedback (wcf) on the use of grammatical collocations in l2 writing. the study also sought to examine whether the effec...