L.К. Zarembo and 0.Yu. Serdobol'skaya

A second-approximation solution is found for the excitation of standing waves of finite amplitude in a loss-free solid layer. A solution is also found for the problem of detecting amplitude-modulated longitudinal and transverse waves, by ex­ploiting the nonlinear properties of the medium. The effect of high-frequency damping is analyzed.

V.I. Yukalov

The existence of a wave function for one of a set of N subsystems is analyzed. It is shown that, even in the case of noninteracting subsystems, none can have a wave function in the ordinary sense. A generalized wave function is introduced which can be used to describe any subsystem of any system, and the relation between this function and the genealogical coefficients and the density matrix is determined.

В.B. Bukhovtsev and О.V. Kulagina

The general properties of trajectories of the roots of characteristic equations of the Фn(p)+ρψm(p)+ ρ^2Θl(p)=0 type are discussed. The general properties of these trajec­tories yield the qualitative behavior of the root hodographs. A method is also described for plotting the root trajectories based on methods developed for the root trajectories of equations having a linear free parameter. Examples are given.

M.A. Kasymdzhanov

An experimental study was made of the transverse structure, time dependence, and spatial coherence of the radiation from a pulsed ultraviolet laser having an active medium of N2 and operating at a wavelength of λ=3371 А. The transverse structure of the structure of the laser beam is found to depend on the mirror adjustment, and the radiation is found to be coherent over the entire aperture. The use of an amplifier is suggested for increasing the efficiency of such lasers.

A.S. Gorshkov, V.F. Marchenko, and S.D. Shchipakin

A.V. Kolpakov

V.B. Braginskiy, N.B. Brandt, and V.I. Osika

D.G. Afonin and Yu.A. Pirogov

Hector Poblete Devia

N.B. Brandt, I.G. Kuzemskaya, and L.V. Lazareva