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...

Aims & Backgrounds: In today's competitive world, cities are increasingly concerned about their identity, image and value, In this regard, creating an environment favorable to attracting different classes of the ambitions of city managers and planners in each city. This can only be achieved what the city presents (identity), what is perceived (image) and its evaluation by its users (the evaluat...