نتایج جستجو برای: and function
تعداد نتایج: 16938555 فیلتر نتایج به سال:
abstract: in the paper of black and scholes (1973) a closed form solution for the price of a european option is derived . as extension to the black and scholes model with constant volatility, option pricing model with time varying volatility have been suggested within the frame work of generalized autoregressive conditional heteroskedasticity (garch) . these processes can explain a number of em...
هدف تحقیق حاضر بررسی تاثیر نشانه های فرا گفتمان متنی بر فهم متون انگلیسی به وسیله ی زبان اموزان فارسی زبان است.این تحقیق علاوه بر این کوشیده است تا میزان اگاهی این زبان اموزان و نحوه ی تعامل انان را با متون خوانده شده در زبان انگلیسی به وسیله ی پرسش نامه ی تهیه شده بررسی کند.بر اساس محتوای یک متن انگلیسی یازده سوال درست /غلط طرح گردید و یک مرتبه با ان متن و یک مرتبه با نسخه ای که نشانه ها...
objective(s):neurotoxicity of anticancer drugs complicates treatment of cancer patients. vinblastine (vbl) is reported to induce motor and cognitive impairments in patients receiving chronic low-dose regimen. materials and methods: the effects of vbl treatment on motor, learning and memory functions of male and female wistar rats were studied by behavioral related tests. animals were given chro...
any change in the refractive index of a laser active medium can lead to serious degradation of beam quality, laser beam modes, laser performance and variation in the intensity distribution. alteration in the refractive index of laser active medium is especially notable in high power lasers. it is clear that in the laser beam production, the pumping agent induces a great amount of heat which...
translation as a comunicative process is always said to be associated with various aspects of meaning loss or gain. subtitling as a mode of translating, due to special discoursal and textual conditions imposed upon it, is believed to be an obvious case of this loss or gain. presenting the spoken sound track of a film in writing and synchronizing the perception of this text by the viewers with...
welding is one of the key components of numerous manufacturing industries, which has potential physical and chemical health hazards. many components of welding fumes can potentially affect the lung function. this study investigates the effects of welding fumes on lung function and respiratory symptoms among welders of an automobile manufacturing plant in iran. this historical cohort study asses...
background and objective: hypothyroidism is a known consequence of the external beam radiotherapy to the neck encompassing the thyroid gland for over 40 years. the aim of this study was to find out the incidence of hypothyroidism in patients with head and neck cancer treated with radiotherapy, when radiation portals included whole of the thyroid gland. materials and methods: this prospective no...
this study was designed to evaluate the detrimental effect of atrazine (atr) on germinal epitheliums (ge) cytoplasmic carbohydrate (ch) and unsaturated fatty acids (ufa) ratio and to clarify the effect of atr on serum levels of fsh, lh, testosterone and inhibin-b (inh-b). the impact of atr exposure on total antioxidant capacity (tac), sperm dna packing and integrity were also investigated. seve...
the main objective of an ecosystem sustainable management is to preserve itscapacity to respond and adapt to current disturbances and/or future changes, and maintain theprovision of environmental goods and services. two very important properties linked to thisobjective are the ecosystem resilience and resistance to disturbance factors. the objective ofthis paper is to recommend conceptual modif...
background the exposure to noxious agwents such as lead my cause lung disorders. objectives in the present study, pulmonary function tests and self-reported respiratory symptoms in lead exposure workers were compared with matched control subjects. materials and methods the frequency of respiratory symptoms were evaluated in a sample of 108 lead exposure workers and 100 control subjects with sim...
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