نتایج جستجو برای: navi loss
تعداد نتایج: 446157 فیلتر نتایج به سال:
in this thesis, barium ferrite nano particles were prepared by sol-gel method. their structural and magnetic properties of samples have been investigated using thermo gravimetric analysis (tg-dta), x-ray powder diffractometer (xrd), fourier transform infrared (ftir), scanning electron microscopy (sem), field emission scanning electron microscopy (fesem), ac susceptometer, vibrating sample magne...
Abstract Determining a precise nitrogen fertilizer requirement for maize in particular field and year has proven to be challenge due the complexity of inputs, transformations outputs cycle. Remote sensing deficiency may one way move applications closer specific requirement. Six vegetation indices [normalized difference index (NDVI), green normalized (GNDVI), red-edge (RENDVI), triangle greennes...
background: taxi drivers have the most important role in the public transport services. they are exposed to various harmful agents and occupational hazards. noise is a harmful occupational factors and hearing loss is its most important effect. protection of drivers against hearing loss is essential. this study was performed to determine the prevalence of hearing loss among taxi and agency drive...
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