Popel Oleksandr Mychajlovych physicist; b. Apr. 15, 1942; BS in physics, Ivan Franko Lviv State U., Ukraine; PhD in Solid State Physics, Ivan Franko Lviv State U., Ukraine, 1977. Scienific interests: theory of parametric effects in segnetoelectrics, theory of electronic and vibrational spectra of crystal and amorphous materials, defects in disordered systems. Publications: over 30.