نتایج جستجو برای: 15 to 30 mmin
تعداد نتایج: 10785007 فیلتر نتایج به سال:
Daddi et al. have recently reported strong clustering of a population of red galaxies at z∼3 in the Hubble Deep Field–South. Fitting the observed angular clustering with a power law of index −0.8, they infer a comoving correlation length r0 ∼ 8h Mpc; for a standard cosmology, this r0 would imply that the red galaxies reside in rare, M ≥ 10hM⊙ halos, with each halo hosting ∼ 100 galaxies to matc...
Photodynamic therapy (PDT) is an experimental therapy for the treatment of superficial cancer using laser light. In PDT a uniform light distribution is usually required for an optimal therapeutic effect. To irradiate part of the oral cavity uniformly for PDT, two prototype applicators were built, each for a different lower jaw. The applicators made use of the light transmitted through the wall ...
زیبایی مفهومی نسبی و مبتنی بر سلیقه است و متناسب با فرهنگ و شرایط اجتماعی گوناگون تعریف میشود. پژوهش حاضر در صدد بررسی انسانشناختی مفهوم زیبایی صورت نزد جوانان 20 تا 30 ساله منطقه 15 شهر تهران است، برای دستیابی به این هدف ابتدا سیر تحول تاریخی زیبایی و سپس معنی آن در یک جغرافیای خاص مورد بررسی قرار گرفته است. پژوهشگر به مهمترین نظریههای شناخت بدن به مثابه امری فرهنگی در حوزه انسانشناسی و ...
this study investigated the effects of planning on second-language written production with regard to task type. the participants were 75 iranian learners of english as a foreign language attending a private foreign language institution. they were asked to complete two different types of writing tasks (expository writing task and argumentative writing task) in different planned conditions (indiv...
this study was an attempt to investigate the effect of subtitling on vocabulary learning among iranian intermediate students. to find the homogeneity of the groups, tofel test was administered to student in kish mehr institute in garmsar. after analyzing the data, 60 participants (female students) who scored within the range of one standard deviation above and below the mean, were selected as h...
مقدمه: مصرف روزافزون مواد مخدر در کشور ما با توجه به جوان بودن جامعه ایرانی و اعتیاد به مواد مخدر به دشواری پیچیده اجتماعی بدل شده و پیامد ویرانگر دارد. از سوی دیگر با توجه به این نکته که رفتار وابستگی زیادی به محیط اجتماعی دارد و همچنین در نظر داشتن این جستار که لازمه بررسی و شناخت دقیق این مسائل داشتن نگاه کلنگرانه مبتنی بر روشهای کیفی است در این پژوهش تلاش شده عوامل موثر بر اعتیاد در افر...
In this paper we present an Õ(m √ n log U) time algorithm for solving the maximum flow problem on directed graphs with m edges, n vertices, and capacity ratio U . This improves upon the previous fastest running time of O(mmin ( n,m ) log ( n/m ) logU) achieved over 15 years ago by Goldberg and Rao [8] and improves upon the previous best running times for solving dense directed unit capacity gra...
the following null hypothesis was proposed: there is no significant difference between the efl students listening comprehension development receiving pictorial cues and those receiving no cuse. to test the null hypothesis, 52 male and femal freshmen students of medicine studing at iran university of medical scinces were randomly selected from a total population of 72 students. to ensure that th...
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