This paper addresses how to assess the performance of refractivity-from-clutter (RFC) techniques in different regions of the world with varying duct strengths and statistics. The performance of evaporation duct estimation is investigated in littoral zones such as the North Sea, Wallops Island, Coast of California, Mediterranean, Persian Gulf, and Coast of Brazil. The effects of the radar freque...

This paper investigates the flow characteristics along a ribbed square duct using time-resolved particle image velocimetry. The Reynolds number, defined by main velocity (1.82 m/s) and hydraulic diameter (80 mm), is 10 000. rotation numbers are 0, 0.13, 0.26, 0.39, 0.52. blockage aspect ratios of 0.1 1, respectively. As number increases, recirculation zone on suction side becomes larger, reatta...

background : the application of ventilation systems in industries and workplaces is with the aim of improving environmental conditions for employees. the lack of appropriate ventilation system components design and control methods result in the production of sound and vibration in most components. the purpose of this study was to determine the role of the pad isolator in controlling vibration a...

aim : to assess the complications of bile duct injury in laparoscopic cholecystectomy in loghman medical center, tehran. background : the incidence of complications of laparoscopic cholecystectomy has increased dramatically since the introduction and widespread use of laparoscopic cholecystectomy.  patients and methods : from january 1998 to january 2002, a total of 155 laparoscopic cholecystec...

OBJECTIVES The family of receptor protein tyrosine phosphatase β (RPTPβ) is composed of 4 splice variants and thought to play roles in the neural migration and outgrowth. Several ligands including the growth factor pleiotrophin (PTN) bind to RPTPβ and inhibit its phosphatase activity, thereby activating cellular signalling pathways. We examined the expression and localization of RPTPβ and its l...

BACKGROUND In pancreaticobiliary maljunction (PBM), the sphincter of Oddi can not control bile and pancreatic juice flow, which may lead to two-way reflux of bile and pancreatic juice, thus causing chronic inflammation, thickening, fibrosis and metaplasia of the common bile duct wall. These pathophysiological changes have been linked to disruption of the epithelium barrier in the common bile du...

A 33-year-old woman with a history of intravenous cocaine abuse presented with fatigue, nausea, and jaundice. Serologic testing revealed a positive hepatitis C virus (HCV) antibody and HCV RNA. Ultrasound and magnetic resonance imaging/magnetic resonance cholangiopancreatography showed a partially obstructing lesion in the common hepatic duct, which was confirmed by endoscopic retrograde cholan...