نتایج جستجو برای: high frequency data

تعداد نتایج: 4249881  

Journal: :Resources Policy 2021

Abstract In this study, we examine the asymmetric short- and long-run spillover among commodities using realized variances semivariances calculated through 5-min trading data of commodity futures. doing so, apply time frequency domain generalized error variance decomposition approaches build a network connectedness. Our findings indicate low inter-group connectedness, distinct group clustering,...

Journal: :medical journal of islamic republic of iran 0
shaghayegh omidvar department of audiology, school of rehabilitation sciences, iran university of medical sciences, tehran, iran. zahra jafari department of rehabilitation basic science, school of rehabilitation sciences, iran university of medical sciences, tehran, iran. saeid mahmoudian ent and head & neck research center, iran university of medical sciences, tehran, iran. mehdi khabazkhoob department of medical surgical nursing, school of nursing and midwifery, shahid beheshti university of medical sciences, tehran, iran. mohsen ahadi department of audiology, school of rehabilitation sciences, iran university of medical sciences, tehran, iran. address: shahnazari st, mirdamad blvd, tehran, iran. nasrin yazdani otorhinolaryngology research centre, amiralam hospital, tehran university of medical sciences, tehran, iran.

background: the possible role of cochlear function in tinnitus generation is still a matter of debate. to assess the role of outer hair cell dysfunction in tinnitus and its possible relationship with ultra-high frequency (uhf) hearing sensitivity, transient evoked otoacoustic emissions (teoae) and uhf hearing thresholds were investigated in normal hearing individuals with and without tinnitus. ...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه اصفهان - دانشکده زبانهای خارجی 1390

the purpose of this study was to investigate iranian efl learners’ beliefs about the role of rote learning (rl) in vocabulary learning strategies; besides, the study examined if english proficiency would influence learners’ vocabulary learning strategy use. this study addresses the need for a clear understanding of the role of rl in efl vocabulary learning by looking at iranian efl learners’ ow...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه زنجان 1389

until now many studies have been done over recent decades throughout the world to show the right age to start english. in iran, research is still at an early stage in terms of evaluating teachers’ beliefs about teaching children english. the problem of at what age to start teaching english and how to teach english to elementary school children has not been solved neither in this country nor els...

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