Coherent population trapping in an ensemble of three-level atoms in the presence of cooperative relaxation

We derive equations that describe the dynamics of three-level atoms with a cascade system of levels interacting with two resonant coherent fields in conditions where cooperative relaxation dominates over incoherent spontaneous emission. We calculate the temporal dynamics of the values of the atomic populations. The possibility of coherent population trapping in the presence of the cooperative decay is established. Finally, we calculate the averaged population of the intermediate level as a function of detuning for different values of the coupling constant. Zh. éksp. Teor. Fiz. 112, 869–876 (September 1997)     

Approach to the numerical solution of boundary-value problems in the theory of shells in coordinates of general form

Taken from a paper presented at the First European Conference on Numerical Methods in Engineering, held in Brussels, Belgium, September, 1992.     

Improved calculation of the stress-strain state of orthotropic noncircular cylindrical shells

Institute of Mechanics, Ukrainian Academy of Sciences, Kiev. Translated from Priklanaya Mekhanika, Vol. 28, No. 1, pp. 63–69, January, 1992.