نتایج جستجو برای: quality variations
تعداد نتایج: 927433 فیلتر نتایج به سال:
background: pregnancy is often considered as a stressful period with physiological and psychological variations. these changes may reduce quality of life in many women. the present study was aimed to determine the quality of life in pregnant women referred to health centers of izeh city, central iran. methods: a descriptive and analytical study carried out on 300 pregnant women who had referred...
The Effect of Breast Composition on a No-reference Anisotropic Quality Index for Digital Mammography
There are several methods to evaluate objectively the quality of a digital image. For digital mammography, objective quality assessment must be performed without references. In a previous study, the authors investigated the use of a normalized anisotropic quality index (NAQI) to assess mammography images blindly in terms of noise and spatial resolution. Since the NAQI is used as a quality metri...
Chemical quality change of the underground water resources of Bam andBaravat plain between 1997-2003
Introduction: Freshwater shortage and its sustainability and unsustainability are under consideration across the world. The fact that considerable parts of Iran are located in the arid and semiarid regions, is indicative of these geographical and climatic characteristics. This descriptive study is conducted to evaluate the chemical quality of water in Bam and Baravat plain and the variations ...
nowadays, problems and barriers to supply adequate water and also environmental issues have caused wastewater treatment (wwt) to be considered a high priority. in light of high costs of wwt, using natural capacities to reduce pollution could be potentially significant. in this study, the impact of varying temperature and channel roughness have been investigated on the wastewater quality paramet...
Our primary aim, in this paper, is to propose and investigate, for the first time, the application of Data Envelopment Analysis (DEA) technique in assessing Iranian public universities. We provide an analysis on the importance of the stakeholder’s perspective on the structure of DEA and the variations of efficiency results. For illustrations, we perform efficiency analysis on a sample of public...
Introduction: Since palmaris longus tendon is the first choice for grafting, its anatomical variation is important. This study was designed to find the anatomical variations of this tendon in Iranian population by performing a study on cadaver. Method: In this study, 150 forearms belonged to 75 cadavers were studied. After exploring the proximal end of tendon, tendon width was measured at its p...
The objective of the present study is to investigate the effects of irrigation water salinity,cow manure levels and different planting methods on saffron quality compounds includingcrocin (coloring strength), picrocrocin (bitterness) and safranal (aromatic strength). A split-splitplot arrangement was conducted in complete randomized block design with irrigation watersalinity levels (0.45 (fresh...
An understanding of the complexity of spatial-temporal variations in regional air quality and its respective source contributors is one of the priority research areas due to the adverse effects of air pollution on human health and the environment. In this paper, we integrate air dispersion modeling and Geographic Information System (GIS) based spatial analysis methods to characterize regional a...
introduction quality control (qc) techniques are used in monitoring and maintenance of the components of an x-ray system. qc of radiology devices plays a significant role in reduction of medication dose and optimization of image quality. this study aimed to conduct qc tests on randomly selected radiology devices, installed in diagnostic imaging departments of iran. materials and methods in tota...
Background and Aim: This study aimed gender variations about adolescents' health-related quality of life. Materials and Methods: A cross-sectional study was performed on four hundred students selected by a Stratified random sampling. Two-way analysis of variance was used for the analysis of total health-related quality of life scores among boys and girls in terms of demographic factors. Data ...
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