نتایج جستجو برای: 12s delay time the middle crustal layer at about 23
تعداد نتایج: 16583578 فیلتر نتایج به سال:
[1] The key geological observations and structural interpretations associated with the current plume hypothesis for Venusian crustal plateau formation are that (1) shortwavelength, spatially periodic tectonic structures originated as mechanical instabilities in a regionally extensive surface brittle layer whose basal boundary was thermally generated and controlled; (2) characteristic wavelength...
efl/esl textbooks have been regarded as essential language teaching materials with which the learners spend about 70 up to 90 percent of their class time. the important role they play and their vast use make them not only influential in learning the language but also in shaping values and attitudes. put it another way, textbooks socialize learners using their contents (i.e. texts, illustrations...
this study was an attempt to investigate the effect of using c-test passages on the reading comprehension and incidental vocabulary learning of iranian intermediate efl learners. the participants were 60 male efl learners at kish mehr institute in garmsar. in fact, there were two groups, an experimental group and a comparison group with 30 students in each. the participants were pretested throu...
cement is an essential ingredient in the concrete buildings. for production of cement considerable amount of fossil fuel and electrical energy is consumed. on the other hand for generating one tone of portland cement, nearly one ton of carbon dioxide is released. it shows that 7 percent of the total released carbon dioxide in the world relates to the cement industry. considering ecological issu...
the significance of the study of deixis was then mentioned. the purpose of the present study from the outset was to provide a comprehensive overview of all kinds of deixis in persian, describing and defining each in true while considering them structurally and semantically. chapter two consisted of two main parts. a review of the english studies in this respect, besides presenting persian liter...
conclusions the automatic bolus-tracking method, results in higher contrast enhancement of the aorta and spleen at the portal phase, but has no effect on liver enhancement. however, bolus tracking is associated with reduced variability for liver enhancement among different patients. results forty-eight patients (23 male, 25 female, mean age=56.4±13.5 years) were included. the contrast enhanceme...
Background: Developmental delay in preterm infants was estimated to be more common than term infants. Identifying the factors predisposing to developmental delay can help experts and health professionals in this field to prevent developmental delay of the infants, and leads to better management of the condition of them. This study aimed to evaluate and investigate the predisposing factors of de...
In this study, the effect of cladded tungsten carbide layer upon HSS - M2 tool steel on microstructure, hardness, and wear behavior has been studied in two cases without using the middle layer and using the middle layer of nickel. Tungsten Carbide cladded on HSS - M2 tool steel by Arc Weld ( SMAW ). The ASTM-G65 wear test was used to determine its application for use in the mineral indus...
متاسفانه در سالهای اخیر تقلبات در تولید مواد غذایی افزایش چشمگیری داشته است و شناسایی بقایای بافتهای دامی در مواد خوراکی اهمیت روزافزونی یافته است. لذا تشخیص اختصاصی گونه ها و شناسایی گروه های حیوانی مورد استفاده در مواد غذایی امری ضروری می باشد. به دلیل حضور dna در همه سلول ها، می توان جهت تشخیص گونه حیوانی از آن استفاده کرد. یکی از بهترین راه های تشخیص تقلب در مواد غذایی استفاده از روشهای مول...
the importance of writing as a complex skill in applied linguistics has drawn the attention of many researchers to evaluate textbooks in order to help learners gain self-sufficiency and autonomy in the field of language use and communication. investigations have shown that developments in textbooks evaluation can promote the quality of pedagogies and consequently the learning. this study attemp...
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