نتایج جستجو برای: wave and s

تعداد نتایج: 16965331  

Journal: :فیزیک زمین و فضا 0
عبداله سهرابی بیدار استادیار، دانشکده زمین شناسی، دانشگاه تهران، ایران محسن کمالیان دانشیار، پژوهشکده مهندسی ژئوتکنیک، پژوهشگاه بین المللی زلزله شناسی و مهندسی زلزله، تهران، ایران محمد کاظم جعفری استاد، پژوهشکده مهندسی ژئوتکنیک، پژوهشگاه بین المللی زلزله شناسی و مهندسی زلزله، تهران، ایران

it is well established that the seismic ground response of surface topographies may differ from those of free field motion during earthquakes. complex nature of seismic wave scattering by topographical structures can only be solved accurately and economically using advanced numerical methods under realistic conditions. among the numerical methods, the boundary element is a powerful numerical te...

Introduction: Studies have shown that brain waves are anomalously active in anxiety patients, but so far, no interventional studies have been performed. Therefore, the purpose of the present study was to determine the effectiveness of cognitive rehabilitation on reducing anxiety and brain wave pattern in patients with anxiety. Anxiety disorder was widespread. Methods: This study was quasi-expe...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه صنعتی اصفهان - دانشکده شیمی 1389

in this thesis, a new optically active poly(amide-imide) (pai) was synthesized by the indirect polycondensation reaction of the l-phenylalanine based diacid chloride and 4,4?-diaminodiphenylether in the presence of triethylamine in n-methyl-2-pyrrolidone. the formation of pai was confirmed by ftir, 1h nmr and elemental analysis. in next step, the surface of titanium dioxide (tio2) nanoparticles...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه علامه طباطبایی 1390

abstract u.s. attack to afghanistan after 9/11 provided opportunities for us who tried to become the dominant power after collapse of ussr and bipolar world. thinkers like fukuyama believed american liberal democrats thought would be universally accepted without resistances. liberal democracy is the best and final model of governance; in this regard, united state has moral responsibilities for...

Journal: :emergency journal 0
anahita alizadeh ghamsari bita dadpour fares najari

introduction: previous studies have raised the probably of cardiac manifestation in tramadol poisoning. however, conclusive information on electrocardiographic (ecg) abnormalities of tramadol overdose remains to be explained. therefore, the present study aimed to evaluate the epidemiology of ecg abnormalities in tramadol poisoned patients. methods: in a prospective cross-sectional study, all pa...

حدادپور, عبدالرضا, ساعدی, داریوش ,

Doppler ultrasound is one of the non-invasive methods for blood flow assessment in cardio-vascular system and celiac trunk as the first branch of abdominal aorta is an important splanchnic artery. According to the relative differences in the reports of normal indices from doppler ultrasound of the celiac artery in the different medical centers of the world, it was decided to evaluate this issue...

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