"This book provides relevant case studies, innovative applications and latest empirical research findings on application design, development and usage of mobile devices. It presents current developments, innovations, laws and legislations, research and analysis on the usage of mobile devices...

A variety of rare earths (REs, including Y, La, Pr, Tb and Er)-doped SnO2 materials has been synthesized by a solvothermal method and was used for gas sensors for detecting different gases. The effects of RE doping on structural, electronic and gas-sensing properties of SnO2 have been...