SovietRxiv · Open Access in English
Rediscovering the Soviet scientific archive, in English
25357 full-text translations 14926 English PDFs 22539 abstracts
Showing 50 of 25357 papers
This paper investigates the mechanism of radical telomerization of olefins with carbon tetrachloride and chloroform initiated by iron pentacarbonyl and iron chlorides. By comparing product distributions and partial chain transfer constants with those obtained under peroxide or azo initiation, the au…
This note reports early experiments on exciting a cadmium sulfide semiconductor quantum generator using a beam of fast electrons. A CdS single crystal cooled in a helium cryostat was irradiated with approximately 200 keV electrons in pulsed operation, producing intense green emission at 4966 Å. As c…
This paper studies normal algorithms over fixed finite alphabets that compute Boolean functions, measuring algorithmic complexity by the length of an encoded representation of the algorithm. It defines computability and noncomputability at a given complexity bound, recognition of such noncomputabili…
The paper develops a discrete production model for dynamic programming problems concerning the allocation of interrelated investments across industries, revising earlier formulations by explicitly incorporating the duration of a complete production cycle. It replaces broken-line production character…
This study applies isotopic exchange with oxygen enriched in oxygen-18 to compare the relative strength and mobility of oxygen bonding in several uranium oxides and sodium uranates. Exchange experiments in a static quartz circulation apparatus were combined with surface-area measurements and diffusi…
This paper examines how relative microdistortions of a metal crystal lattice affect heterogeneous catalytic processes, using hydrogen atom recombination on molybdenum as a model system. A thermodynamic analysis based on entropy production and Curie’s theorem argues that lattice microdistortions asso…
This paper examines conditions under which spontaneous dispersion of liquids or solids can occur when formation of new interfacial area would normally raise the free energy. It contrasts thermodynamically stable colloidal emulsions and suspensions, possible only at very low interfacial free energy w…
This study examines low-temperature reactions of macroradicals generated by mechanical dispersion of solid polymer solutions, using electron paramagnetic resonance to follow changes in radical spectra without thawing or atmospheric exposure. Polystyrene, polymethyl methacrylate, and polybutylene gly…
This study examines how surface-active media affect the onset and development of athermal seizure during sliding friction of technically pure iron, aluminum, and copper. Using a specialized friction machine, the author compares critical loads, friction coefficients, welding behavior, and surface-lay…
This paper addresses multidimensional problems in the calculus of variations in the large, focusing on the construction of shortening deformations without relying on local uniqueness. It proposes deformations along parabolic steepest descent trajectories for the variational functional and uses stabi…
This paper investigates how stress concentrations affect the strength of model unidirectional fiberglass-like systems consisting of cross-linked polymer binders reinforced by a single glass rod. Using polarization-optical observation during tensile loading and a theoretical treatment based on shear …
This study examines the use of mass spectrometry for structural analysis of methyl ethers of disaccharides, a class of derivatives sufficiently volatile for this method despite the general low volatility of carbohydrates. The authors prepared and analyzed hepta-O-methyl derivatives of disaccharides …
This study examines whether tert-butyl hydroperoxide reacts directly with the double bond of styrene to form free radicals, a question relevant to olefin oxidation and hydroperoxide-initiated polymerization. Using the inhibitor method in heptane solution, the authors measured radical formation from …
This study examines the electrooxidation of organic substances on rotating platinized platinum electrodes at potentials corresponding to hydrogen adsorption, a region where appreciable oxidation rates were observed under suitable conditions. Using potentiostatic measurements with sawtooth and triang…
The paper studies a Carleman-type boundary value problem for single-valued analytic functions in a finite multiply connected domain with Lyapunov boundary, where the boundary correspondence is an involutive orientation-preserving homeomorphism on each component. It develops integral representations …
The paper studies an inverse problem for the metaharmonic potential: determining a body of unit density from a prescribed exterior metaharmonic function close to the potential of a given star-shaped body. Under smoothness and smallness assumptions, the boundary of the unknown body is represented as …
This paper reports an experimental and theoretical study of regenerative optical quantum amplifiers, optical amplifiers using positive feedback in an active medium with negative temperature. Several resonator schemes are analyzed, with gain expressions derived for plane, internally coupled, and unid…
This paper calculates the energies of octupole collective states with quantum numbers K pi equals 0 minus in even, even strongly deformed nuclei in the mass regions 152 to 186 and 228 to 254. Using approximate second quantization within the superconducting nuclear model, the authors solve a secular …
The paper develops a sufficient criterion for the absolute stability of nonlinear pulse automatic systems whose nonlinear element is monotone and lies in a prescribed sector. Using auxiliary truncated sequences, a Lyapunov, Parseval based frequency domain argument, and an added term involving the fi…
The paper develops a method of basis expansions for linear differential equations with singular coefficients in which the unknown solution is represented as a series of basis functions satisfying a related equation and a recurrence relation in the parameter. A recurrence formula is derived for the c…
This paper examines the reaction of stannanols with acetylene and substituted acetylenes in comparison with the known vinylation behavior of alcohols and silanols. The authors argue that, unlike alcohols and silanols, stannanols do not form organotin vinyl ethers but react through the active acetyle…
The paper reports an experimental study of microwave electromagnetic wave transmission through a bismuth specimen under conditions favorable to magnetoplasma oscillations. Two adjacent strip resonators sharing the bismuth sample as a common wall were used at 9600 MHz and about 1.8 K, with the magnet…
This paper develops a theoretical explanation for the layered structure of diffusion flux observed near the critical demixing point of a binary liquid solution. Starting from the entropy density used in the theory of critical opalescence and applying irreversible thermodynamics, it derives generaliz…
This study examines phase equilibria and the possibility of mutual limited gas solubility in the water, butane system, motivated by predictions for dipolar substances and by solubility parameter considerations. Using a high pressure, high temperature apparatus with phase sampling and compositional a…
The study examines how loading duration and temperature affect the long-term strength of three-dimensional polymer films made from melamine-formaldehyde and polyester resins. Measurements of time to failure under stress across several temperature ranges showed that strength generally follows exponen…
This paper examines how weak interactions among Langmuir oscillations in an ideal plasma produce shifts of plasmon frequency and damping. For long-wavelength longitudinal plasmons, the author formulates a four-plasmon interaction Hamiltonian and applies a retarded Green-function perturbation method …
This paper examines how substituent effects are transmitted along carbon chains as reflected in the nuclear quadrupole resonance frequencies of Br-79 and Cl-35 in aliphatic halogen compounds. It proposes an empirical calculation scheme in which frequency shifts from limiting values for primary and s…
This paper studies conditions under which a one-dimensional stationary Feller Markov process on an interval is reversible, assuming the existence of a transition density and governing backward and forward diffusion equations. Using Yaglom’s reversibility theorem together with Feller’s boundary class…
This paper presents a simplified method for proving Hölder continuity and obtaining Hölder norm estimates for solutions and derivatives of linear and quasilinear elliptic and parabolic equations. Building on earlier class-based estimates and incorporating Moser’s logarithmic subsolution idea, the au…
This study examines the initiation of vinyl chloride polymerization by systems formed from triethylaluminum, halogen-containing organic compounds, and titanium trichloride. Experiments at 20 degrees with various alkyl, aryl, and polyhalogenated chlorides show that polymerization is absent in hydroca…
The paper examines ordinary and second sound in a weakly nonideal Bose gas in the limiting case where the collision frequency is small, complementing earlier hydrodynamic treatments. Using one-particle Green functions in the random-phase approximation, it treats the kinetic-energy contribution as a …
This paper reports the reduction and dehydration chemistry of acyl derivatives of cyclopentadienylmanganese tricarbonyl. Acetyl, propionyl, and benzoyl compounds are reduced with lithium aluminum hydride to the corresponding secondary alcohols, while reduction in the presence of aluminum trichloride…
The paper studies singular integral equations with continuous and piecewise continuous matrix symbols, extending a previously developed local method for operators on Lebesgue spaces. It defines generalized singular integrals through local equivalence to shift-invariant homogeneous operators and char…
This paper studies hypoellipticity for systems of linear differential equations with infinitely differentiable variable coefficients, extending known criteria beyond scalar formally hypoelliptic operators and previously treated special systems such as elliptic, parabolic, and quasi-elliptic cases. A…
This note studies Lie algebras of arbitrary dimension over fields of characteristic zero through elements whose one-dimensional subalgebras are subinvariant or attainable in normal series. It introduces the corresponding B-radical and SB-radical, using results on nilderivations, nil elements, locall…
This paper reports measurements of elastic scattering of polarized 4.00 MeV neutrons by a set of light, medium, and heavy nuclei, including beryllium, carbon, cobalt, nickel, selenium, niobium, cadmium, indium, tin, iodine, lead, and bismuth. Using polarized neutrons from the deuteron deuteron react…
The paper presents an exact method for calculating normal waves in a periodic cellular waveguide, reducing the problem to an eigenvalue equation for the cell Breisig operator. The method constructs a matrix representation directly from the Maxwell boundary-value problem, using expansions in partial …
The study examines joint adsorption of polyacrylamide and the cationic hydrophobizing agent cetyltrimethylammonium bromide on kaolin, motivated by their combined use in strengthening clay soils. Adsorption was evaluated mainly from surface tension measurements before and after contact with 5 percent…
The paper derives boundary growth estimates in weighted L2 norms for generalized solutions of elliptic-type equations of arbitrary order with variable coefficients in a bounded smooth domain. It treats the equation as the Euler equation of a Dirichlet integral whose coefficients may degenerate at th…
This note studies completeness of eigenvectors and associated vectors for non-self-adjoint second order differential equations on the real line with complex weight functions. The equations are transformed by means of the positive self-adjoint operator associated with \(-d^2/dx^2+q(x)\), reducing the…
The paper studies uniform approximation of continuous functions on compact subsets of Euclidean space by functions harmonic in neighborhoods of the compact set. Building on the Keldysh, Brelot, and Deny capacity criterion, it reformulates the approximation condition through local Newtonian capacity …
This paper investigates the dimensions and cross-sectional form of molecular formations responsible for anomalous field-electron emission patterns observed when organic semiconductors are adsorbed or condensed on tungsten tips. Using Rose’s formula for local magnification, the authors relate the mea…
The paper addresses the possible lower orders of entire functions of finite order that possess a finite deficient value, a question arising in Nevanlinna theory and related to the Edrei and Fuchs conjecture. It constructs, for arbitrary parameters satisfying one half less than the lower order and th…
The study examines the thermal interaction of diisopropylmercury with chloroform, deuterated chloroform, and carbon tetrachloride in the absence of oxygen at about 130°C, conditions chosen to simplify previously observed oxygen initiated chain reactions. Product analysis by mass spectrometry showed …
This study examines the mechanism of oxidation of tetraammineplatinum(II) chloride by iodine, a reaction previously discussed largely on theoretical grounds for square planar platinum complexes. Using potentiometric measurements in sulfuric acid solution, the authors followed changes in iodine elect…
This study examines the reactions of 3-methylpentene-2, used as a model for the polyisoprene unit, with cationic-type catalysts relevant to transformations observed in natural rubber. Using ethylaluminum dichloride and titanium tetrachloride under dry argon without solvent, the authors followed cis-…
This note proves a topological classification result for systems of ordinary differential equations in neighborhoods of closed trajectories, analogous to Grobman’s theorem for singular points. Using local coordinates near a periodic orbit, the system is reduced to a periodic nonautonomous equation t…
The study applies the galvanostatic method to high-temperature electrode processes at interfaces between carbon-saturated iron melts containing silicon, manganese, or sulfur and liquid aluminosilicate or aluminate slags at 1320 to 1420 °C. Polarization rise and decay curves recorded with an oscillog…
A method is proposed for calculating one-electron states in arbitrary, statistically disordered systems of atoms, including liquids, glasses, compressed gases, alloys, impurities, and polymer semiconductors. The approach uses a tight-binding expansion in localized atomic functions, treats a finite g…
