Possibility of impulsive gas transport through a capillary at high initial pressure in the system (P 0≥100 MPa)

The possibility of impulsive (using a chemical explosive) gas transport at high initial pressure from a secondary into a primary vessel in times 100t175sec has been experimentally demonstrated. In the first 90sec the proposed device is insensitive to the high internal gas pressure. Whent90sec the strength properties of its elements must be taken into account. By this time the amount of gas in the primary vessel has increased by approximately 43% relative to the initial amount. The use of lightweight pistons (titanium, aluminum or magnesium instead of steel) makes it possible to bring the piston travel time within the range insensitive to the strength properties.Translated from Izvestiya Rossiiskoi Akademii Nauk, Mekhanika Zhidkosti i Gaza, No. 5, pp. 3–9, September–October, 1993.     

Cohomology of the Poisson Superalgebra on Spaces of Superdimension (2, <Emphasis Type="Italic">n</Emphasis><Subscript>−</Subscript>)

Under certain assumptions about the continuity of cochains, we study the cohomology spaces of a Poisson superalgebra realized on the space of smooth Grassmann-valued functions with compact support in ℝ². We find the zeroth, first, and second cohomology spaces in the adjoint representation in the case of a constant nondegenerate Poisson superbracket. __________ Translated from Teoreticheskaya i Matematicheskaya Fizika, Vol. 145, No. 3, pp. 291–320, December, 2005.     

A Pseudo-classical Model of a Weyl Particle and Quantization of Classical Constants

A problem is considered where a Weyl particle is described in (3 + 1) dimensions. In doing this, we modify the quantization procedure, taking into account the contemporary progress in the understanding of the quantization of models with degenerate coordinates (i.e., with coordinates that enter into the Lagrangian without their time derivatives). The related problem of quantization of classical constants, which is characteristic of the most of pseudo-classical models of relativistic particles, is also discussed.     

Equivalence of Lagrangian and HamiltonianSp(2)-symmetric BRST quantizations

The existence of a local solution to the quantum Sp(2) master equation and the equivalence of the Lagrangian and Hamiltonian Sp(2) quantizations are proved in the framework of perturbation theory. Translated from Teoreticheskaya i Matematicheskaya Fizika, Vol. 110, No. 1, pp. 137–148, January, 1997.     

Total nuclear photoabsorption cross sections in the region 150 < A < 190

The curves of the total gamma-absorption cross sections (σ_tot) in the E1 giant resonance energy range for the nuclei ¹⁵⁴Sm, ¹⁵⁶Gd, ¹⁶⁵Ho, ¹⁶⁸Er, ¹⁷⁴Yb, ¹⁷⁸Hf, ¹⁸⁰Hf, ¹⁸¹Ta, ¹⁸²W, ¹⁸⁴W, ¹⁸⁶W and ¹⁹⁷Au have been measured using the absorption method. Parameters of the Lorentz curves fitting the measured cross sections σ_tot are given. Quadrupole moments (Q₀) and nuclear deformation parameters (β) were obtained.For deformed nuclei in the ～ 155 < A < ～ 180 region a violation of the correlation between giant resonance widths (Γ) and nuclear deformation parameters was found. Γ₁ and Γ₂, the widths of the resonances corresponding to vibrations of nucleons along and across the nuclear deformation axis, were observed to decrease with the increase of A which could be accounted for by the presence of an N = 108 subshell.     

Stationary waves described by a generalized KdV-burgers equation

We have obtained solutions in the form of stationary waves within the framework of the generalized KdV-Burgers equation, which contains nonconservative terms of linear pump, linear HF dissipation, and nonlinear dissipation. Both periodic and solitary waves are analyzed. Institute of Applied Physics of the Russian Academy of Sciences, Nizhny Novgorod, Russia. Translated from Izvestiya Vysshikh Uchebnykh Zavedenii, Radiofizika, Vol. 40, No. 10, pp. 1241–1248, October, 1997.     

Reactions of highly electrophilic polyfluoro unsaturated compounds with pyrazole derivatives

Pyrazole derivatives were hydroxyalkylated at the C⁴ atom by hexafluoroacetate and methyl trifluoropyruvate. The products of the hydroxyalkylation were dehydrated to the corresponding alkylidene derivatives which were reacted with nucleophiles. Dicyanoethylenes, obtained from polyfluorocarbonyl compounds, alkylated pyrazol-5-ones with the formation of pyrazolopyran derivatives.A. N. Nesmeyanov Institute for Organometallic Compounds, Russian Academy of Sciences, 117813 Moscow. Translated fromIzvestiya Akademii Nauk, Seriya Khimicheskaya, No. 11, pp. 2617–2623, November, 1992.     

C-alkylation of indoles by 1,1-bis(trifluoromethyl)-2,2-di-cyanoethylene and 2-trifluoromethyl-3,3-dicyanoacrylic acid esters

Indole and its derivatives with various substituants in the 1 and 2 positions of the indole ring react with 1,1-bis(trifluoromethyl)-2,2-dicyanoethylene and 2-trifluoromethyl-3,3-dicyanoacrylic acid esters to give C³-alkylation products.Translated from Izvestiya Akademii Nauk SSSR, Seriya Khimicheskaya, No. 5, pp. 1193–1195, May, 1991.