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in this research, an integrated inventory problem is formulated for a single-vendor multiple-retailer supply chain that works according to the vendor managed inventory policy. the model is derived based on the economic order quantity in which shortages with penalty costs at the retailers` level is permitted. as predicting customer demand is the most important problem in inventory systems and th...
multiple sclerosis (ms) is a complex polygenic disease in which gene-environment interactions are important. a number of studies have investigated the association between tumor necrosis factor-α (tnf-α) -308 g/a polymorphism (substitution g→a, designated as tnf1 and tnf2) and ms susceptibility in different populations, but the results of individual studies have been inconsistent. therefore, per...
Introduction : One of the recommended ways in organizing the information in the websites is the application of Meta Tags. The application of a variety of Meta Tags can affect the precision rate of search engines retrieval. They can also promote the rank of a website. The purpose of the study was to investigate the structure of libraries websites based on Meta Tags in medical science univers...
iv abstract this study examined the linguistic behaviors of two iranian efl teachers each of them teaching learners of two similar proficiency levels, a beginner level and an intermediate level, to investigate the relationship between the learners proficiency levels and the amounts and purposes for l1 use by the two teachers. the study was carried out to investigate whether there were differe...
there are two major theories of measurement in psychometrics: classical test theory (ctt) and item-response theory (irt). despite its widespread and long use, ctt has a number of shortcomings, which make it problematic to be used for practical and theoretical purposes. irt tries to solve these shortcomings, and provide better and more dependable answers. one of the applications of irt is the as...
In an attempt to explain the lack of consensus that emerged from a review of the extant literature on the performance implications of cultural differences in mergers and acquisitions [M&A], meta-analyses were conducted for three categories of performance measures: stock market-based measures, accounting-based measures, and socio-cultural integration outcomes. As hypothesized, meta-analytic find...
employees always concern about losing their job , or in other word , losing their income resources. for this purpose, every government requires strong system for covering these concerns. the unemployment insurance (ui) program’s can be used for achieving this goal. in this thesis, we price ui based on the insurance history of employee and the duration of being unemployed. we use the weibull dis...
Background: Burn is one of the public health problems, especially in low-income and middle-income countries, and this problem is far more important for pregnant women and their fetus. There was no a systematic study to comprehensively review the epidemiology of Maternal and Fetal`s Burn inIran, this study was conducted for this purpose. Materials and Methods: In this systematic review and meta...
Objectives: There have been several studies published in the medical literature over the past 30 years that address the association between tea consumption and osteoporosis with inconsistent findings. A meta-analysis was undertaken, including 8 studies, to determine the effect of tea consumption on the risk of fracture. Methods & Materials: This systematic review and meta-analysis conducted ...
Background: Congenital anomaly is a disturbance in fetal growth and development during pregnancy and is one of the main causes of morbidity and mortality in the first year of life. In addition, this anomaly causes a large waste of heath care resources. We aimed to determine the prevalence and proportion rates of different congenital anomalies in Iran via a systematic review and meta-analysis.Me...
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