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An apparatus intended for investigating the dynamics of gas-bubble compression was used to perform static and dynamic tests. Static tests were used to measure the deflection of the membrane shaper under various static pressures in liquids, while dynamic tests were used to measure the velocity of one of the membrane shapers under quick relief of pressure in the gap between the rupture membrane and the second membrane shaper. Both dynamic and static tests were performed under pressures up to 30 atm. A comparison of the experimental and the calculated data was made.

Two experimental apparatuses were developed to investigate gas-bubble compression dynamics. Both apparatuses were manufactured; the main components and rupture membranes of these apparatuses were tested. This paper describes the design of the two apparatuses and identifies the physical and functional aspects of the experimental setup.

This paper gives experimental results on the geometry of a gas bubble upfloating in a liquid for the case of a single exposure to a pressure pulse. An apparatus operated in the mode of rarefaction–compression wave generation in a liquid was used for experiments with two media: gas–air and liquid–water. Geometrical sizes were registered with the help of the optical shadow method. Experimental results were used to study how the evolution of dimensionless volume of the upfloating gas bubble depends on time (V(t)/V0) in the case of exposure to a variable dimensionless pressure field in time P(t)/P0.

A review dedicated to the contemporary methods of quantization of the gravitational field. In view of possible applications to elementary particle theory, the authors consider only asymptotically flat gravitational fields. The basis of the exposed method of quantization is the method of quantization of gauge fields in the functional integration formalism. The main result is the formulation of covariant rules for a diagrammatic perturbation theory. Its elements are the lines representing gravitons and the vertices of graviton-graviton interaction, as well as the lines and interaction vertices of fictitious vector particles ("Faddeev-Popov ghosts") characteristic for the theory of gauge fields. The expressions for the propagators and vertex functions are given explicitly. It is shown that the presence of fictitious particles in the covariant diagram technique guarantees the unitarity of the theory and the agreement between the covariant quantization with the canonical quantization. The bibliography contains 44 entries (54 names).