Research in English language teaching has highlighted the importance of communication skills classroom. Against backdrop extensive research everyday communication, goal this was to explore whether current discourse analytic is reflected lessons and examples five textbooks, by using spoken requests as subject investigation. The textbooks were evaluated on criteria deriving from politeness, speec...

Background: Back pain is a common patients’ complaint, and its etiology is important because of different potential treatment approaches (based on causes). For a better diagnosis, magnetic resonance imaging (MRI) is widely used in clinical settings that may result in inappropriate requests. This study aims to evaluate the appropriateness of the lumbosacral MRI requests in patients with ba...

Requests are at the core of many social media systems such as question & answer sites and online philanthropy communities. While the success of such requests is critical to the success of the community, the factors that lead community members to satisfy a request are largely unknown. Success of a request depends on factors like who is asking, how they are asking, when are they asking, and most ...

The generalized 2-server problem is an online optimization problem where a sequence of requests has to be served at minimal cost. Requests arrive one by one and need to be served instantly by at least one of two servers. We consider the general model where the cost function of the two servers may be different. Formally, each server moves in its own metric space and a request consists of one poi...

background: back pain is a common patients’ complaint, and its etiology is important because of different potential treatment approaches (based on causes). for a better diagnosis, magnetic resonance imaging (mri) is widely used in clinical settings that may result in inappropriate requests. this study aims to evaluate the appropriateness of the lumbosacral mri requests in patients with back pai...

background: in the present study the amount of requested blood products in major departments of imam reza medical center, kermanshah, iran has been studied to evaluate the necessity of these requests and also the amount of blood products wastage because of unnecessary requests. materials and methods: in the present study the information related to 4832 unit of requested blood products from iran...