Alireza Sharifian

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We investigate the problem of multi-user radio resource allocation for orthogonal frequency division multiple access (OFDMA) amplify-and-forward (AF) relays. In the singleuser case, the problem reduces to the well know assignment problem, which maximizes the user rate. For the multi-user case we devise a resource allocation algorithm to achieve maxmin(More)
Providing ubiquitous very high data rate coverage in next generation wireless networks is a formidable goal, requiring cost-effective radio access network (RAN) devices, such as multiuser enabled amplify-and-forward (AF) relays, and fair radio resource management (RRM). To further this goal, we investigate multi-user enabled AF relays which multiplex user’s(More)
In this paper, we consider joint realtime (RT) and non-realtime (NRT) flows packet scheduling and resource block (RB) allocation in orthogonal frequency division multiple access (OFDMA) wireless networks. Radio resource blocks (RB)s in OFDMA plane are to be distributed among RT and NRT flows. In the conventional approach, RT and NRT flows are served(More)
Purpose: The present study was conducted to determine the effect of vitamins C and E administration on the outcome of therapy in patients with paraquat intoxication admitted in the Poisoning Emergency Department (PED) of Noor Teaching General Hospital, Isfahan, Iran. Methods: We studied retrospectively medical records of 186 patients admitted to the PED in(More)
Ventriculoperitoneal (VP) shunt placement that diverts the cerebrospinal fluid (CSF) into the peritoneal cavity is the most common method of treatment of hydrocephalus. This shunt has a high incidence of malfunction mainly due to catheter obstruction or infection. About 20% of these complications are abdominal that may occur at any time after shunt(More)
We devise an optimization framework for generalized proportional fairness (GPF) under different time scales for amplify-and-forward (AF) relay networks. In GPF scheduling, a single input parameter is used to change the fairness from throughput optimal, to proportionally fair and asymptotically to max-min fair. We extend the GPF scheduling to include a new(More)
INTRODUCTION Primary small cell carcinoma of the esophagus (PSCEC) associated with paraneoplastic sweating syndrome is a rare disease characterized with rapid growth rate, metastasis at the time of diagnosis, and poor prognosis. The lung is the most common site for small cell carcinoma but this malignancy includes 0.1% to 1% of all gastrointestinal and 0.8%(More)
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