let h be a separable hilbert space and let b be the set of bessel sequences in h. by using several interesting results in operator theory we study some topological properties of frames and riesz bases by constructing a banach space structure on b. the convergence of a sequence of elements in b is de_ned and we determine whether important properties of the sequence is preserved under the con...

in this study, scour of mashkid bridge pier located in mashkid river of saravan county has been studied and to measure the scour rate, the numerical model hec-ras 4.0 has been used. upon selection of mashkid river as the case study and whereas the studied zone is important with respect to the climatic conditions and showery monsoon raining and flowing the great and destructive floodwaters, ther...

چکیده همانطور که می دانیم زبان فارسی سرشار از اصطلاحات می باشد تا آنجا که برقراری ارتباط زبانی بدون استفاده از اصطلاحات به راستی بسیار سخت می باشد و اکثریت گویشوران زبان فارسی و یا زبان های دیگر این آرایه ادبی را ناخودآگاه استفاده می کنند. از آنجایی که هر زبان شیوه خاص خو را برای بیان موارد خاص استفاده می کند، یک اصطلاح در یک زبان ممکن است در زبان دیگر موجود نباشد و یا اصطلاح کاملا متفاوتی برا...

this study investigates the effect of teacher’s repetition as an input enhancement technique in explicit teaching of vocabulary items on efl learners’ later retrieval. to this end, 66 persian speaking english learners, aged 18 - 29, homogenized through a standard proficiency test (opt), were chosen and put into two experimental and control groups, each 33 learners. general service list (gsl), a...

in this thesis,spin dependend transport and electron transport through of ng/sg(graphene/ superconductor graphen) are studied in the junction of ng/fgt/sg. due to andreev reflection conductance increases in the presence of superconductor graphene.also, by applying a voltage gate on a superconductor, fermi level shifts and the conductance is independent of ferromagnatic substrate. also, the cond...

abstract global financial crisis has created too many problems in relations among governments. among these problems, the issue of global monetary management, more than every time in the past four decades, has been moved in the center of international economic attentions. a problem which is specially known with the monetary hostility between united states and public republic of china. where ar...

The literature of text, especially poetry and its nature is a subject that ‘Attār, like some other mystics, pays attention of very much. Although he does not give a logical definition and description of it, ‘Attār explains and reflect on it in his works repeatedly according to his mystical views. Because of his mystical attitude, he looks at poetry and story from the perspective of content and ...