Solutions of elastic and electric fields of piezoelectric materials with inclusions and defects.-Micromechanics modeling of piezoelectric composites.- Determination of the critical sizes of ferroelectric nanodomains.- Size and surface effects on phase transitions in nanoferroelectric materials.- Compliant ferroelectric films and strain engineering.- Derivation of the Landau-Ginzburg expansion coefficients.- Multiferroic materials.- Breakdown models...