نتایج جستجو برای: correction

تعداد نتایج: 165307  

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه علامه طباطبایی - دانشکده زبان و ادبیات فارسی 1386

چکیده ندارد.

Journal: :iranian economic review 0
joseph ayoola omojolaibi department of economics, university of lagos, lagos, nigeria. ekundayo peter mesagan department of economics, university of lagos, lagos, nigeria. nsofor chinedu stanley department of economics, university of lagos, lagos, nigeria.

globalization is a worldwide phenomenon. the concept globalization is a very recent term only establishing its current meaning in the 1970s, which emerged from the intersection of four inter related sets of communities of practice, academics, journalists, publishers. this paper models the channels through which globalization affects financial sector development in nigeria. to this end this stud...

In this paper a new automatic method is presented to enhance the image brightness through gamma correction process. Most of current gamma correction methods apply a uniform gamma correction across the image. Considering the fact that gamma variation for a single image is actually nonlinear, the proposed method does the gamma correction in a local approach. Thus the method is able to estimate ap...

Hossein Alinezhad Roxana Aminzadeh

This study aimed at comparing the impact of two types of teacher feedback on Iranian EFL learners’ writing ability and their verb tense consistency in L2 writing. Following the administration of a standardized language proficiency test (Preliminary English Test), sixty-two participants were selected and were randomly assigned to the control (direct-only correction) and experimental (direct meta...

Introduction Evaluation of the delivered dose of externally wedged photon beams by external diode dosimeters during the treatment process requires the estimation of exit surface dose correction factors in various wedge angles and field sizes. Materials and Methods A system of absorbed dose evaluation, using p-type diode dosimeters placed on the exit surface of a phantom, was characterized for e...

Journal: :iranian journal of radiation research 0
m.r. teimoori sichani department of medical radiation engineering, science and research branch, islamic azad university, tehran, iran m. amoui department of nuclear medicine, shahid beheshti university of medical science, tehran, iran sh. akhlaghpoor noor medical imaging center, tehran, iran m. hosntalab department of medical radiation engineering, science and research branch, islamic azad university, tehran, iran

background: in this study, quantitative 32p bremsstrahlung planar and spect imaging and consequent dose assessment were carried out as a comprehensive phantom study to define an appropriate method for accurate dosimetry in clinical practice. materials and methods: ct, planar and spect bremsstrahlung images of jaszczak phantom containing a known activity of 32p were acquired. in addition, phanto...

Journal: :iranian journal of medical physics 0
alireza mohammadkarim department of medical radiation engineering, science and research branch, islamic azad university, tehran, iran ph.d student, department of medical physics, faculty of medical sciences, tarbiat modares university, tehran, iran hasan ali nedaie department of radiotherapy, oncology and medical physics, tehran university of medical sciences, tehran, iran mahmoud allahverdi department of medical physics, tehran university of medical sciences, tehran, iran mahbod esfehani department of radiation oncology, cancer institute of iran, tehran university of medical sciences, tehran, iran alireza shirazi department of medical physics, tehran university of medical sciences, tehran, iran ghazale geraily department of medical physics, tehran university of medical sciences, tehran, iran

introduction evaluation of the delivered dose of externally wedged photon beams by external diode dosimeters during the treatment process requires the estimation of exit surface dose correction factors in various wedge angles and field sizes. materials and methods a system of absorbed dose evaluation, using p-type diode dosimeters placed on the exit surface of a phantom, was characterized for e...

Introduction: Integration of single photon emission computed tomography (SPECT) and computed tomography (CT) scanners into SPECT/CT hybrid systems permit detection of coronary artery disease in myocardial perfusion imaging (MPI). Misregistration between CT and emission data can produce some errors in uptake value of SPECT images. The aim of this study was evaluate the influence...

The true MR signal intensity extracted from noisy MR magnitude images is biased with the Rician noise caused by noise rectification in the magnitude calculation for low intensity pixels. This noise is more problematic when a quantitative analysis is performed based on the magnitude images with low SNR(<3.0). In such cases, the received signal for both the real and imaginary components will fluc...

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