The long history of innovation in the field piezoelectric devices has, over last 65 years, been predominantly rooted a single material, Pb(Zr, Ti)O3 ceramic, known as lead zirconate titanate (PZT). Despite enormous resources being dedicated 20 years to identifying lead-free alternatives PZT and developing thriving, but limited, market PbTiO3-relaxor crystals, most device developments are still ...

‎in this paper, based on [a. razani, v. rako$check{c}$evi$acute{c}$ and z. goodarzi, nonself mappings in modular spaces and common fixed point theorems, cent. eur. j. math. 2 (2010) 357-366.] a fixed point theorem for non-self contraction mapping $t$ in the modular space $x_rho$ is presented. moreover, we study a new version of krasnoseleskii's fixed point theorem for $s+t$, where $t$ is a cont...

Green space is one of the important infrastructures for keeping natural life and sustainability in modern urbanism and it provides excellent recreational opportunities for the people in the society. However, there are limiting factors in green space development, especially in arid regions, including extreme weather and soil temperatures, low average rainfall, drought, and high potential for eva...