the present study was an attempt to conduct a contrastive analysis between general english (ge) and english for specific purposes (esp) texts in terms of cohesion and cohesive devices. to this end, thirty texts from different esp and ge textbooks were randomly selected. then they were analyzed manually to find the frequency of cohesive devices. cohesive devices include reference, substitution, ...

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...

Season is the natural pattern of change in nature, which is related to the movement of the sun, the temperature cycle, the life cycle of the earth (phenology) and human culture. In astronomical and climatic seasons, a year divided into four seasons, spring, and summer, autumn and winter (Alsop, 2005), (Trenberth, 1983). Season is a period of the year with a homogeneous climate (Alsop, 1989), th...

بندپایان با داشتن بیش از یک میلیون گونه، بزرگترین شاخه جانوری محسوب می شوند. خانواده کنه های سخت در زیر راسته متااستیگماتا و راسته کنه سانان (آکارینا) از شاخه بندپایان قرار دارند (wall and shearer, 2001). تاکنون 650 گونه و در حدود 13 جنس در 5 زیرخانواده از آنها گزارش گردیده است (wall and shearer, 2001 ). به طوری که 10 درصد کنه ها از حیوانات اهلی تغذیه می کنند و در انتقال عوامل بیماری زا به انسا...

one of the most important goals for increasing recognition and treatment revenue is transmitting vital data to medical care team, more quickly. nowadays, use of new technologies for transmitting data will deploy more and more daily. in this article, for transmitting electrocardiogram, first we code the signal into a suite of codes, then we will use bluetooth technology to transmit data from off...

one of the most important number sequences in mathematics is fibonacci sequence. fibonacci sequence except for mathematics is applied to other branches of science such as physics and arts. in fact, between anesthetics and this sequence there exists a wonderful relation. fibonacci sequence has an importance characteristic which is the golden number. in this thesis, the golden number is observed ...

استفاده از لاستیکهای فرسوده به منظور تسلیح خاکهای سست در بستر راهها (bosscher et al., 1997; heimdahl and druscher,1999)، کنترل فرسایش در خاکها (poh and broms, 1995)، پایداری سازی شیبها (poh and broms, 1995; garga and o’shaughnessy, 2000a)،پشت ریز سازه های نگهبان به عنوان مصالح سبک وزن (bosscher et al., 1997; lee, et al., 1999; garga and o’shaughnessy, 2000b) ، به عنوان مصالح فیلتر در مراکز دفن ...

abstract: the present study is an attempt to find out cultural exophoric references in iranian high-school elt textbooks and touch stone series to compare the frequency of occurrence of such references in these books. the purpose is to find out which of the series of the books under investigation impose a greater referential burden on efl learners as far as their reading comprehension of the ...

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...

بیشتر افراد کنه های خانواده ی اریوفیده از آفات مهم گیاهان هستند. از سویی، تعدادی از آنها به دلیل تک خواری و سایر ویژگی های زیستی و بوم شناختی دارای پتانسیل به کارگیری در کنترل زیستی علف های هرز هستند. به منظور شناسایی کنه های خانواده ی اریوفیده فعال روی علف های هرز بوم نظام های کشاورزی در فصول زراعی سال های 1389 و 1390 ضمن بازدید از مناطق مختلف استان خراسان رضوی اقدام به نمونه برداری از گونه ها...