Mohammadreza Ahmadi

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The aim of this study was to determine the diagnostic value of a serologic test for Helicobacter pylori (H. pylori) in pediatric population presenting with abdominal pain suspected of peptic disease. We conducted a preospective cross sectional study. There were 202 children with abdominal pain. Serologic BM test using Helisual Quick test kit was performed.(More)
Traveling Wave Ultrasonic Motors (TWUSMs) possess extreme nonlinear properties such as saturation reverse effect and dead-zone, which are reliant on the driving conditions. These characteristics make modeling and control of TWUSMs highly challenging. Thus, deriving a simple and precise mathematical model suitable for controlling USMs has been a major(More)
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