نتایج جستجو برای: reference value
تعداد نتایج: 975912 فیلتر نتایج به سال:
Introduction The present work describes a study in which, based on patient dose measurements, thermoluminescent dosimeters were used to obtain the diagnostic reference level arising from panoramic radiography. Materials and Methods Ten panoramic units and a sample of 15 patients per X-ray unit were studied. Two thermoluminescent dosimeter chips were placed on the skin surface of selected organs...
a phase-locked loop (pll) based frequency synthesizer is an important circuit that is used in many applications, especially in communication systems such as ethernet receivers, disk drive read/write channels, digital mobile receivers, high-speed memory interfaces, system clock recovery and wireless communication system. other than requiring good signal purity such as low phase noise and low spu...
Background : External quality assessment referred to the survey of different laboratories' results of a unique specimen as compared with a reliable reference. These assessments have been introduced since 1988 in Iran . Results were processed according to techniques of measurement and their accuracy was checked against the reference value. Methods : We have gathered results of 14 parameters in 9...
Marketing is the core department in most enterprises, and it main source of business. The ultimate goal marketing to promote one's own products or services market customers, stimulate user purchases, create profits for enterprise. To some extent, success related profit level development trend buyer's key balancing supply demand at this stage, should implement innovative strategies from perspect...
esl/efl books play a crucial role in shaping language learners worldview of gender roles in society. the present study investigated the status of sexism in two sets of efl textbooks, one developed by non-native iranian authors (ili series) and the other by native authors (top notch series). first, two books from each series was selected randomly. then, a quantitative analysis was carried out wi...
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