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...

هدف از انجام این پایان نامه برسی تاثیر خود آزمایی با چک لیست بر روی مهارت نوشتاری دانش آموزان با دانش زبانی متوسط میباشد.طبق تعریف alderson (2000) خودآزمایی به معنی قبول مسئولیت ، داشتن کنترل و قضاوت در مورد همه ی جنبه های یاد گیری زبان انگلیسی میباشد. برای رسیدن به این هدف گروهی از دانش آموزان موسسه سخن در سطح pre-intermediate انتخاب شده اند تا در این تحقیق شرکت کنند. در تمام طول ترم خود آزمای...

عوامل زیادی در عملکرد آزمونی زبان آموزان در متن یادگیری زبان موثر می باشد.این تحقیق تلاشی است در زمینه بررسی نقشی که سبک های شناختی و شخصیتی بر عملکرد یادگیرنده های زبانی در سوالات c-test z-test و تست های چند گزینه ای دارد. در این تحقیق سعی شده است تا نقش درون گرایی، برون گرایی، تکانشی و فکری بودن بر روی عملکرد شرکت کنندگان در این آزمون ها بررسی شود. به منظور دستیابی این هدف 212 یادگیرنده زبان ...

this thesis attempts to measure learning styles, self efficacy and intrinsic motivation as predictors of iranian ielts reading comprehension. in order to address this issue, a quantitative study was conducted on some randomly selected intact students at ferdowsi university. these two groups were assigned as they were undergraduate (ba=91) and graduate (ma =74) students; they were all aged betwe...

this study attempted to explore if teaching english collocations through two different modes of awareness-raising and input flooding has any possible differential effect on immediate retention as well as retention in a delayed assessment. it also compared the possible differential effect of teaching english collocations implicitly and explicitly on actively using the items in writing. m...

the aim of the present study was to determine the in?uence of presence or absence of corpus luteum (cl) on hormonal and metabolites composition of follicular ?uid (ff) harvested from different sized follicles and its relationship with blood serum concentrations in sanjabi ewes. ovaries and blood samples were collected from 60 clinically healthy adult ewes (sanjabi breed) 1–3 years of age in dio...

heuristics are often used to provide solutions for flow shop scheduling problems.the performance of a heuristic is usually judged by comparing solutions and run times on test cases.this investigation proposes an analytical alternative ,called asymptotic convergence ,which tests the convergence of the heuristic to a lower bound as problem size grows. the test is a stronger variation of worst cas...

gol-e-gohar iron ore mine of sirjan in southern part of iran is a large open pit that operates below the groundwater table and during mining operation, dewatering is required to prevent operation processes from flooding. current operation is going on by digging wells in or out of the pit and pumping to prevent flooding. as a result of the former dewatering operation a vast deep cone of depressi...

this study tried to explore disciplinary variations of web blurbs across soft and hard knowledge fields on the one hand, and to illustrate how academic publishers exploit interactional metadiscourse devices in move structure of their blurbs on the other.

abstract: postmethod is a newly developed pedagogy which as an alternative to method rejects the notion of good or bad methods and the concept of best method that can be generalized and appropriate for all contexts. instead, it treats each context as unique and one of a kind which cant be compared with other cases. this study is a postmethod-oriented one which investigates whether and how far t...