نتایج جستجو برای: نانوساختار c a s h

تعداد نتایج: 13821208  

Journal: :فیزیک زمین و فضا 0
معصومه احمدی حجت دانشجوی دکتری هواشناسی، گروه هواشناسی، دانشگاه آزاد اسلامی، واحد علوم و تحقیقات، تهران، ایران فرهنگ احمدی گیوی دانشیار، گروه فیزیک فضا، موسسه ژئوفیزیک دانشگاه تهران، ایران سهراب حجام دانشیار، گروه هواشناسی، دانشگاه آزاد اسلامی، واحد علوم و تحقیقات، تهران، ایران

one of the most important atmospheric systems in the eurasian continent during the northern hemisphere winter season is the siberian high pressure. in this study, using the ncep/ncar reanalysis data for winters of 1948-2008, trend of changes in the intensity of the high system center and its effects on some meteorological fields are investigated. the results show that the 2m height mean tempera...

Journal: :مدیریت بازرگانی 0
حسین اعتمادی دانشگاه تربیت مدرس حمیدرضا گنجی علی مهرابی کوشکی

human resource productivity is an important subject in theory and practice, so increase of productivity is the first priority in most of organizations. the main purpose of most organizations is creating value for their shareholders. so it is necessary to understand effect of human resource productivity in achieving this goal and find the obstacles. the purpose of this research is examining the ...

Journal: :auditory and vestibular research 0
faride badfar department of audiology, school of rehabilitation, shahid beheshti university of medical sciences, tehran, iran marzieh sharifian alborzi department of audiology, school of rehabilitation, shahid beheshti university of medical sciences, tehran, iran nima rezazadeh department of audiology, university of social welfare and rehabilitation, tehran, iran alireza akbarzade baghban department of basic sciences, school of rehabilitation, shahid beheshti university of medical sciences, tehran, iran homa zarrinkoob department of audiology, school of rehabilitation, shahid beheshti university of medical sciences, tehran, iran afrooz pourfahimi audiology section, comprehensive rehabilitation center of red crescent organization of islamic republic of iran, tehran, iran

background and aim: sinusoidal harmonic acceleration (sha) test is one of the most effective and best-tolerated methods to assess vestibular system function, especially horizontal semicircular canal in children. a prerequisite for using this test in children, is the availability of normative data. despite of the numerous studies related to the sha in adults, few researches have been documented ...

Journal: :iranian journal of public health 0
abolfazl ardakani tahereh seghatoleslam fahimeh jameei rusdi rashid alireza zahirodin farid motlaq

background: given that validity is the baseline of psychological assessments, there is a need to provide evidence-based data for construct validity of such scales to advance the clinicians for evaluating psychiatric morbidity in psychiatric and psychosomatic setting. methods: this comparative cross-sectional study aimed to investigate the construct validity of the malaysian version of the ghq-2...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه لرستان - دانشکده علوم پایه 1388

در این پژوهش نگاشتهای حافظ تعامد وحافظ تعامد تقریبی را در دستگاههای *c- مدولها ی ضرب داخلی مورد مطالعه قرار داده ایم. به ویژه اگر a ،v,w- مدولهای ضرب داخلی روی *‍c-جبر a باشند و این مطلب که هر مضرب اسکالر از یک طولپای a-خطی ، یک نگاشت حافظ تعامد است، که البته عکس این مطلب به طور کلی برقرار نیست. مگر این که a شامل (c*) k(h -جبری از همه ی عملگرهای فشرده روی فضای هیلبرت h) باشد. علاوه براین تخمینی...

Journal: :archives of pediatric infectious diseases 0
maliheh khoddami pediatric pathology research center, mofid children’s hospital, shahid beheshti university of medical sciences, tehran, iran; department of pathology, medical school, shahid beheshti university of medical sciences, tehran, iranسازمان اصلی تایید شده: دانشگاه علوم پزشکی شهید بهشتی (shahid beheshti university of medical sciences) seyed alireza nadji virology research center (vrc), national research institute of tuberculosis and lung diseases (nritld), shahid beheshti university of medical sciences, tehran, iranسازمان اصلی تایید شده: دانشگاه علوم پزشکی شهید بهشتی (shahid beheshti university of medical sciences) mahsa vahdatinia pediatric infections research center, mofid children’s hospital, shahid beheshti university of medical sciences, tehran, iran; pediatric infections research center, mofid children’s hospital, shahid beheshti university of medical sciences, shariati street, 1546815514, tehran, iran. tel/fax: +98-2122227035سازمان اصلی تایید شده: دانشگاه علوم پزشکی شهید بهشتی (shahid beheshti university of medical sciences)

conclusions our study is the first to investigate patients with lch and its possible association with hhv-6 in iran. considering the p level of 0.11, which is statistically insignificant, our findings fail to support the hypothesis of a possible role for hhv-6 in the pathogenesis of lch. these results are in concordance with previous investigations showing negative results. results there was no...

Journal: :پژوهش های جغرافیای طبیعی 0
سعدون سلیمی کارشناسی ارشد آب و هواشناسی سینوپتیک، دانشگاه خوارزمی محمد سلیقه دانشیار گروه آب وهواشناسی، دانشگاه خوارزمی

introduction water vapor can spread in molecular, unstable and erratic phase and can also transfer by convection and advection process. this transfer happens from the earth and ocean surfaces to the atmosphere in hot air. this type of transfer is considered as the main pattern. in the studies of the atmosphere, one of the prominent factors to be considered is the complexity of water vapor and i...

Journal: :journal of biotechnology and health sciences 0
farzad katiraee department of pathobiology, faculty of veterinary medicine, university of tabriz, tabriz, ir iran razzagh mahmoudi department of food hygiene and aquatics, faculty of veterinary medicine, university of tabriz, tabriz, ir iran; department of food hygiene and aquatics, faculty of veterinary medicine, university of tabriz, tabriz, ir iran. tel: +98-9127868571, fax: +98-4136378743 keyvan tahapour department of pathobiology, faculty of veterinary medicine, university of tabriz, tabriz, ir iran gholamreza hamidian department of basic siences, faculty of veterinary medicine, university of tabriz, tabriz, ir iran seyed jamal emami department of pathobiology, faculty of veterinary medicine, university of tabriz, tabriz, ir iran

conclusions potent antifungal activity, make this plant an effective replacement treatment for fungal infections or fungal strains that are resistance to synthetic antifungals. results thirty-two components were identified in vitex agnus-castus eo. the main compound was alpha-pinene (19.48%). the total phenolic content of eo was determined as 82.26 ± 5.94 mg gallic acid equivalent (gae)/g eo. t...

Journal: :مجله علوم اعصاب شفای خاتم 0
behnaz rohani neuroscience department, mashhad university of medical sciences, mashhad, iran

human t-cell lymphotropic virus type 1 (htlv-1) is associated with adult t-cell leukemia/lymphoma (atl) and htlv-1-associated myelopathy/tropical spastic paraparesis (ham/tsp). only a limited percentage of infected individuals develop disease in response to the virus while the majority remain asymptomatic and ham/tsp is the most common clinical manifestation of the virus. ham/tsp is an inflamma...

Journal: :تحقیقات آب و خاک ایران 0
سمانه کارگر علی رئیسی حسن رحیمی

gypsum found in the soil beneath the foundation of structures, specially hydraulic structures, can cause serious damage to them. the mechanical behavior of gypsiferous soils has not so far been investigated in detail except for the works of petrukhin (1993). here, it has been tried to investigate the mechanical behavior and the effect of soil being leached on settlement and strength of these ki...

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