in this work, the effect of erosion on corrosion behavior of coal tar epoxy coating was evaluated usingelectrochemical impedance spectroscopy (eis) measurements. the surface morphology of the coatingwas examined by scanning electron microscope (sem) after 10, 20, 30, 45 and 60 min of erosion processat an impact angle of 90º. after 10 min of erosion process, the nyquist plots showed just a singl...

Soil conservation and control of erosion is a basic problem in all countries. The goal of this research is to estimate erosion and sediment yield in Ekbatan Dam drainage basin by Erosion Potential Method (EPM), using Geographic Information System (GIS). The basin is located in Hamedan Province, west of Iran, in a cold and semi- arid region, with an average annual rainfall of 334mm. The study ar...

introduction: cholesteatoma is traditionally diagnosed by otoscopic examination and treated by surgery. the necessity for imaging in an uncomplicated case is controversial. this study was planned to investigate the usefulness of a preoperative high-resolution computed tomography (hrct) scan in depicting the status of middle ear structures in the presence of cholesteatoma and also to compare the...

The overall intent of this research is to develop numerical models of erosion of levees, dams and embankments, validated by physical models. The physical model tests were performed at 1-g and at high g’s using a geotechnical centrifuge facility. The erosion was modeled in detail, from beginning to end, that is from the time the levee was overtopped until the levee was breached. Typical quantiti...

introduction: the aim of this study was to evaluate the condition of the ossicular chain in patients requiring surgery for cholesteatoma.  materials and methods: in a retrospective analysis, the destruction of the individual and combined bony structures of the ear was described in 166 patients with cholesteatoma who went through surgery in our otology center between 2003 and 2009.  results: tot...