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...

introduction acetic acid bacteria are large group of obligate aerobic gram negative bacteria with the ability to oxidize ethanol to acetic acid (1). they are widely distributed in natural habitats and classified in family acetobacteraceae. members of this family are useful in industrial production of vinegar(2). acetic acid bacteria (aab) can use substrates as glucose, ethanol, lactate or glyc...

the space now known as complete erdos space ec was introduced by paul erdos in 1940 as the closed subspace of the hilbert space ?2 consisting of all vectors such that every coordinate is in the convergent sequence {0} ? { 1 n : n ? n}. in a solution to a problem posed by lex g. oversteegen we present simple and useful topological characterizations of ec. as an application we determine the ...

abstract the problems caused by the traditional system of criminal justice (which are based on remuneration and rehabilitation) such as, lack of attention to victim’s rights and position and society, underlie the emergence of restorative justice which had the victim-centered perspective, with respect to the role of the offender and participation of civil society. meanwhile, criminal mediation ...

saluk mount is selected for devonian biostratigraphy. this area located at southwest of bojnurd. in this study three sections are selected and two sections, chahar-borj and tabar sections with a thickness of 650 m, which consist mainly of calcareous sediments was studied in detailed but third section, qelli section, with a thickness of about 450m which consist mainly of sandstone and evaporates...

the rationale behind the present study is that particular learning strategies produce more effective results when applied together. the present study tried to investigate the efficiency of the semantic-context strategy alone with a technique called, keyword method. to clarify the point, the current study seeked to find answer to the following question: are the keyword and semantic-context metho...

حلقه r، آیکدا ناکایاما حلقه (حلقه –in) نامیده می شود هرگاه پوچ ساز چپ اشتراک هر دو ایده آل راست برابر با مجموع پوچ سازهای چپ آن دو ایده ال باشد. در این پایان نامه نشان داده می شود که اگر r یک in-حلقه راست باشد و a,b دو ایدآل راست r باشند که مکمل یکدیگرند، آن گاه خود توان e?r وجود دارد به طوری که a=er و b=(1-e)r. به عنوان یک نتیجه نشان داده می شود که r خود تزریقی راست است اگر و تنها اگر m2(r) یک...

چکیده پژوهشکده امام خمینی(س) و انقلاب اسلامی مقطع تحصیلی:کارشناسی ارشدچکیده پژوهشکده امام خمینی(س) و انقلاب اسلامی مقطع تحصیلی:کارشناسی ارشد رشته تحصیلی:اندیشه سیاسی در اسلام عنوان پایان نامه:تبیین نظریه حکومت اسلامی امام خمینی بر مبنای الگوی فهم نظریات سیاسی اسپریگنز نام و نام خانوادگی دانشجو:علی مرادی استاد راهنما:دکتر یحیی فوزی استاد مشاور:دکتر منصور انصاری تاریخ شروع پایان نام...