boron nitride semiconducting zigzag swcnt, $b_{cb}$$n_{cn}$$c_{1-cb-cn}$, as a potential candidate for making nanoelectronic devices was examined. in contrast to the previous dft calculations, wherein just one boron and nitrogen doping configuration have been considered, here for the average over all possible configurations, density of states (dos) was calculated in terms of boron and nitrogen ...

زمینه و هدف: تعیین مشخصات کمی و کیفی فاضلاب خام ورودی به تصفیه خانه ها یکی از ارکان اصلی طراحی صحیح تصفیه خانه های فاضلاب به حساب می آید. این مطالعه با هدف تعیین پارامترهای طراحی تصفیه خانه های فاضلاب شهری برای مناطق سردسیر کشور انجام شد. روش بررسی: در این مطالعه توصیفی- تحلیلی سه تصفیه خانه فاضلاب شهرکرد، بروجن و فارسان واقع در استان چهارمحال و بختیاری به عنوان پایلوت در منطقه سردسیر انتخاب و...

Background and Objective: Considering 829000 annual diarrhoeal deaths due to water pollution worldwide, the World Health Organization has emphasized that countries should reduce this rate by upgrading their wastewater treatment systems. The purpose of this study was to evaluate the performance of a modified up flow septic tanks reactor for treatment of synthetic wastewater. Materials and Metho...

this research study aimed to investigate the relationship between field-dependence/independence cognitive style and vocabulary learning strategies among iranian efl learners. ninety participants majoring in english translation at arak university were chosen. the participants were classified into two groups of field-dependent and independent based on the results of group embedded figure test (ge...

Background and Objective: Due to increasing the water demand and the lack of its resources, the reuse of effluents is considered as a useful option in the water resources management. The aim of this study was to evaluate the possibility of the reuse of effluents from the extended aeration process in the wastewater treatment plant of the Bojnoord city for agricultural uses. Materials and Method...

this study purported to compare and contrast the use of self-mention and evidentials as two mtadiscourse features in opinion columns of persian and english newspapers. the theoretical basis of this study is the idea that metadiscourse features vary across cultural boundaries. for this purpose, 150 persian and 150 english opinion columns were collected based on three factors of topic, audience a...

the purpose of the present study was to investigate the effect of instruction through debate on male and female efl learners’ reading comprehension, to examine the differences between the performance of male and female participants on the five dimensions of cctst including analysis, evaluation, inference, deductive reasoning, and inductive reasoning, and to examine the differences between male ...

در این مطالعه توانایی راکتور زیستی غشایی الیاف توخالی برای تصفیه پساب نمک بالای واقعی صنایع نفتی در شرایط مختلف زمان ماند، فلاکس عبوری، دما و دیگر شرایط عملیاتی بررسی شد. پایلوت ساخته شده برای این بررسی شامل غشاء اولترافیلتراسیون، واحد اسمز معکوس و پساب واقعی صنایع نفتی به عنوان پساب ورودی بود. پایلوت برای 160 روز فعالیت داشت. نتایج نهایی نشان داد که میانگین حذف اکسیژن مورد نیاز شیمیایی (cod)، ...