نتایج جستجو برای: in each zone
تعداد نتایج: 17020921 فیلتر نتایج به سال:
چکیده نمایشگاه های جهانی یا اکسپو عنوانی ست که از سال 1851 میلادی در لندن توسط همسر ملکه انگلستان شکل گرفت ، هدف اولیه این نمایشگاه ها نمایش دستاورد های صنعتی بود، اما در طول 165 سال که این نمایشگاه های برگزار گردیدند ، رویکرد آنها تغییر کرده است . در هر دوره به یک شعار که در واقع دغدغه اصلی جهان، در آن زمان بوده است ، پاسخ داده شده و راه حل کشور های مختلف در مورد آن موضوع به نمایش گذارده شد...
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 ...
مطالعه 148 نمونه از سازند سروک در برش تنگ چنارباشی در جنوب شرق شهرستان ایلام واقع در مرکز استان ایلام از جهت سنگ چینه نگاری، سیستماتیک، زیست چینه نگاری (بر اساس فرامینیفرا و الیگوستژینید) و چینه نگاری سکانسی بر اساس (hunt&tucker, 1992 ; 1995) انجام شد. با مطالعه سنگ چینه نگاری مشخص شد که در این مطالعه مرز زیرین سازند سروک با شیل آهکی و میان لایه سنگ آهک سازند گرو پیوسته و با سنگ آهک های رسی س...
introduction nowadays, landscape recounts the land components, elements and components which each alone and together have a key role in building and shaping the natural environment and consequently the natural landscape and eventually the built environment and landscape. although humans connection with its surrounding is achieved through different senses, but still more than 80% of its connect...
abstract the present study was conducted to investigate the effect of using model essays on the development of writing proficiency of iranian pre-intermediate efl learners. to fulfill the purpose of the study, 55 pre- intermediate learners of parsa language institute were chosen by means of administering proficiency test. based on the results of the pretest, two matched groups, one as the expe...
The present study sought to determine the interactions between coral reefs and physicochemical properties of water (depth, temperature, salinity, turbidity, dissolved oxygen, pH, chlorophyll a, and water current velocity) and seabed type and slope in Kish Island, Iran. The study area was divided into 19 zones (eight zones with and 11 without corals). Physicochemical properties of water for each...
Introduction: Electrophysiological studies have demonstrated a relationship between aging and atrioventricular (AV) nodal conduction and refractoriness. The aim of the present study was to determine the effects of nodal aging on dynamic AV nodal field potential recording during atrial fibrillation (AF) in rabbit. Methods: Two groups of male New Zealand rabbits (neonatal 2-week-olds and adult...
abstract this study examined the relationship between noticing pronunciation and the improvement pronunciation by administering a 50 item story, as proficiency- test in order to investigate the effectiveness of noticing pronunciation on the improvement of pronunciation. accordingly 60 qualified students were selected and assigned to the two groups of experimental and control randomly, each gr...
this research was conducted to examine the effect of a concurrent training on rest level of leptin of plasma and some hormonal factors in non-athlete subjects. the research population included non-athlete men who didn’t participate in any organized sport activities. 30 men were chosen voluntarily among the above-mentioned population and were divided into 2 groups: experimental (15 subjects) an...
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