در دنیا مناطقی وجود دارند که ساکنین آنها در معرض پرتوهای طبیعی زمینه بالا هستند. این مناطق به ‏‎high background radiation areas hbras‎‏ ، معروف می باشند. از جمله این مناطق می توان به گوارا پاری در برزیل ، کرالا در هند ، نواحی از آمریکا و یانگ جیانگ در چین اشاره کرد. در ایران نیز مناطق با پرتودهی زمینه بالا مشاهده شده است . رامسر یکی از این مناطق است .

building on previous studies on the effectiveness of different types of written corrective feedback, the present study aimed at investigating whether direct focused corrective feedback and direct unfocused corrective feedback produced any differential effects on the accurate use of english articles by efl learners across two different proficiency levels (low and high). in current study, the par...

the purpose of this quantitative study was to investigate the relation between efl teachers’ self-efficacy beliefs and their success. moreover, the study was an analysis of the teacher age, gender and years of teaching experience, to examine the manner in which these factors relate to teacher self-efficacy as defined by bandura (1997) and teaching effectiveness as evaluated by their own student...

دیابت ملیتوس یک گروه هتروژن از بیماریهای متابولیک است که مشخصه آن افزایش مزمن قندخون و اختلال متابولیسم کربوهیدرات ، چربی و پروتئین است.این بیماری باعث اثرات خطرناکی روی سیستم قلبی و عروقی می شود. براساس نتایج حاصله بین رتینوپاتی دیابتی و ‏‎mi‎‏ رابطه معناداری وجود دارد. بطوریکه شدت رتینوپاتی دیابتی در مبتلایان ‏‎mi‎‏ بیشتر است.بنابراین با ‏‎sceening‎‏ به موقع بیماران دیابتی از نظر ‏‎hlp‎‏ و هم...

abstract present research considered to examine and compare shahrray 14 years girls and boys narrative concerning with their responsibilities in this research, statistical society are 14 years girls and boys of shahrry . for performing this research. first, 14 years of 50 boys and 50 girls were selected in accidental method and have filled memati hormaled adolescents responsibility questioner...

the following question poped up: is there any relationship between iranian high school efl learners reading comprehension and listening comprehension? then the following null hypothesis (ho) was developed to the test the above, mentioned question. "there is no relationship between high school efl learners reading comprehension and listening comprehension. for nearly 16 weeks, the experimental g...

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...

abstract ion selective electrodes (ises) are electrochemical sensors that respond selectivity to the activity of ionic species. an ion-selective electrode is an electrochemical device that uses a thin selective membrane or film as the recognition element, and is an electrochemical half-cell equivalent to other half-cells of the zeroth (inert metal in a redox electrolyte). in common methods o...

there is less published research about how teachers in efl contexts respond to students who are relatively less mature and less competent l2 writers. while writing researchers have examined various issues concerning peer and teacher response in writing-oriented classes, little research has centered on the effect of collaborative tasks particularly dictogloss on writing skills. output collaborat...

چکیده سنگ های آتشفشانی فلسیک بخش قابل ملاحظه ای از توالی آتشفشانی ترشیری شمال غرب کاشان را به خود اختصاص داده است. این منطقه بخشی از کمان ماگمایی ارومیه – دختر محسوب شده و طیفی از سنگ های آندزیت بازالتی، آندزیت، داسیت و ریولیت را شامل می گردد. سنگ های آتشفشانی فلسیک منطقه به طور عمده دارای بافت پورفیریتیک و خمیره ای بسیار ریزدانه و گاه میکرولیتی تا شیشه ای هستند. فنوکریست های فلدسپات کم و بیش ...