SovietRxiv · Open Access in English
Rediscovering the Soviet scientific archive, in English
25456 full-text translations 14926 English PDFs 22540 abstracts
Showing 50 of 25456 papers
This study examines the effect of very high graphite loading on the mechanical strength, heat resistance, and thermal conductivity of plastics based chiefly on Bakelite resin and polyvinyl chloride. Samples with varying graphite contents were prepared from resin solutions and graphite powder, presse…
This paper investigates whether neutral pion photoproduction in complex nuclei occurs throughout the nuclear volume or primarily at the surface. Using bremsstrahlung from a synchrotron at maximum energies of 265 and 200 MeV, the authors measured the yield of decay gamma rays from neutral pions produ…
This paper develops an entropy theory for stochastic processes with general, possibly nonstationary state spaces and densities relative to product measures. It defines time-dependent process entropy, relates its existence to Cesàro summability of conditional entropies, and gives conditions under whi…
This note proposes a method for constructing stable finite difference schemes for Cauchy problems for multidimensional hyperbolic systems by composing schemes for associated one-dimensional subsystems. The authors define a common weighted norm and show that if each one-dimensional scheme is locally …
This article aims to provide an overview of the principal works carried out by G. S. Landsberg, his students, and collaborators in the study of intermolecular interactions by spectroscopic methods, without, however, claiming to cover all the issues addressed comprehensively or to systematize the ent…
This note investigates whether the bulging of a liquid interface under ultrasound is necessarily caused by radiation pressure, or whether hydrodynamic acoustic wind can produce the same effect. Using a water and transformer oil cell driven by a 24 kHz magnetostrictive source, the authors recorded th…
This study examines the reduction of aliphatic monoolefins by alkali metals in liquid ammonia in the presence of alcohol proton donors, addressing whether isolated olefinic double bonds can be reduced under these conditions. Normal alpha olefins from pentene-1 to decene-1, as well as heptene-3 and o…
This paper analyzes ignition of fuel-air mixtures by a heated surface under conditions approximating those in engines, using earlier experimental dependences of ignition temperature on compression temperature and pressure. Starting from the thermal theory of heated-surface ignition and adapting it t…
This note studies descriptive set theoretic properties of several derived delta s operations with rigid bases, focusing on points classified by the number and topological structure of chains in a reduced base that determine them. It defines first, second, third, and fourth type points, using uncount…
This paper reports experimental evidence for strong anisotropy in the even, or transverse, photomagnetic effect in germanium single crystals. Using circular disk specimens with peripheral electrodes, the authors measured the photomagnetic potential difference while varying both the angle between the…
This paper treats a plane elasticity boundary value problem for a finite simply connected isotropic homogeneous domain, where the normal displacement and tangential stress are prescribed on a smooth boundary. Using complex potentials and specially chosen contour integral representations, it reduces …
This note proves a refined local limit theorem for sums of independent, non-identically distributed integer-valued random variables. Assuming finite absolute moments of order 2 plus delta, a Lyapunov-type fraction, and an aperiodicity condition expressed through the lattice probabilities, it establi…
This study examines the polarographic behavior of copper and cadmium oxides dissolved in molten borax, motivated by the analytical importance of direct measurements in high-temperature melts. Using platinum electrodes at 820 degrees C, the authors recorded polarograms, tested alternative equations f…
The paper studies convergence classes for interpolation series associated with entire functions defined by generalized moment functionals. It formulates criteria, based on limiting functions derived from the moment kernels and on the nearest zero of those functions, that determine the exact class in…
This paper reports a stratospheric cosmic-ray measurement of the inelastic interaction cross section of protons with kinetic energies above about 7 BeV, with carbon nuclei. Using a counter telescope with graphite and lead absorbers, the authors determine the cross section by two approaches: attenuat…
This paper reports the synthesis and characterization of divalent platinum complexes with epsilon-aminocaproic acid, extending earlier work on platinum compounds of alpha, beta, and gamma amino acids. The authors show that formation of an inner complex salt is not achieved for this 1,6 amino acid, c…
This study examines the electrical conductivity and thermoelectric behavior of chromium silicides and silicon-rich chromium alloys in order to assess their possible semiconductor properties. Alloys were prepared from refined chromium and silicon, annealed, and characterized by X-ray diffraction and …
The paper studies small-amplitude periodic solutions near the stationary singular point of autonomous second-order dynamical systems satisfying symmetry assumptions. It reformulates the search for periodic motions of a given period as a nonlinear operator equation and applies topological and bifurca…
This paper examines whether inorganic and organic cations can undergo specific, superequivalent adsorption on a negatively charged mercury surface, contrary to the usual electrocapillary assumption that only anions are specifically adsorbed. Differential capacitance measurements were made with a han…
This study examines the anodic dissolution of metallic thorium in molten alkali-metal chlorides, a process relevant to the electrochemistry of molten salts. Polarization measurements were made for a thorium anode in an equimolar sodium chloride and potassium chloride melt at 710 and 815 degrees Cels…
This paper develops a unified control-theoretic account of photoelectric fluxmeters, treating them as closed-loop systems analogous to operational amplifiers with negative feedback through a differentiating element. Using operational calculus, it derives transfer functions for the galvanometer, phot…
A method is presented for exciting hypersonic oscillations in quartz by applying ultra-high-frequency resonance techniques rather than relying on very thin piezoelectric plates. Thick X-cut quartz plates were placed in coaxial lines or resonators driven by continuous generators tunable from 10^8 to …
This paper gives necessary and sufficient conditions for the complete approximative solvability of broad classes of equations when both operators and right hand sides are approximated. It shows that, for sequences of linear mappings converging uniformly, all solutions of a limiting equation can be a…
This paper studies small oscillations of multiple rigid bodies floating on the surface of a liquid contained in a bounded basin, within linear wave theory. It formulates coupled equations for body translations and rotations and the free surface elevation using added masses, Green’s functions, and no…
This paper describes a synthetic route to aliphatic dialkylamino alcohols using thiophene derivatives as precursors, motivated by the relevance of amino alcohols to physiologically active compounds. Tertiary amines of the thiophene series were converted to organolithium compounds, oxyethylated with …
From the collection dedicated to the 70th anniversary of the birth of Niels Bohr.
This paper investigates the conversion of polyalkylaromatic coke-oven solvent, mixed with toluene, into xylenes and other low-molecular aromatic hydrocarbons over synthetic aluminosilicate catalysts. Experiments in flow reactors examined the effects of temperature, pressure, feed rate, and reaction …
This paper studies measures of Hausdorff type on metric spaces with a countable base, defined from countable Vitali covering systems with prescribed elementary measures. It proves that such measures have the F-property for analytic sets: finite-measure analytic sets contain closed subsets with measu…
This study examines the alkylation of alpha and beta naphthols with acetylene in alcoholic solution using a phosphoric acid, boron trifluoride catalyst system with mercuric oxide. Experiments on beta naphthol varied catalyst concentration, temperature, solvent, acetylene flow, and reaction time, ide…
The study examines the kinetics of propylene absorption by 67 percent aqueous sulfuric acid under conditions intended to minimize diffusion limitations. Experiments measured pressure decrease and product formation over a range of temperatures, with analyses of isopropyl alcohol and isopropyl hydroge…
This note studies linear functionals on the spaces of multivariable functions \(C_{s_1\ldots s_n}\) and \(L^p_{s_1\ldots s_n}\) that vanish on systems of generalized polynomials defined by prescribed one-variable function systems with nonzero Wronskians. It extends earlier representation results for…
This paper examines whether complete particle size distribution analysis can be obtained from X-ray diffraction line profiles for highly dispersed graphite powders and colloidal preparations produced by vibratory grinding. Using harmonic analysis of diffraction line shapes, corrected by Stokes’ meth…
This note studies the first boundary value problem in nonlinear elasticity, with the displacement prescribed on the boundary, in both three-dimensional Sobolev spaces and plane Hölder spaces. It formulates the nonlinear elasticity operator, relates the method of elastic solutions to a modified Newto…
This study examines the acidic fraction of oleoresin from Norway spruce and reports the identification of dehydroabietic and palustric acids as additional constituents. Resin acids obtained from freshly tapped spruce oleoresin were separated through alkaline extraction, regeneration, reaction with m…
This paper proves inverse theorems for polynomial approximation of functions on a finite interval, addressing the fact that classical Jackson type direct theorems do not have complete converses in this setting. Building on a strengthened Jackson estimate that improves approximation near the endpoint…
This paper extends several sharp results from univalent conformal mapping to non-univalent meromorphic or regular functions whose ranges have no common values. It develops derivative and value estimates in finitely connected domains, gives extremal systems, describes the attainable boundary for pair…
The study examines the kinetics of hydrogen peroxide decomposition in aqueous solutions over a broad concentration range, from 2 to 92 mole percent, under gamma irradiation, with comparison to thermal and ultraviolet initiated decomposition. Reaction rates were measured volumetrically by oxygen evol…
This note studies the Cauchy problem for a quasilinear hyperbolic equation in two independent variables by replacing the classical wave operator with Böğel’s generalized hyperbolic operator. Using normal families and an analogue of Peano’s method, in the style of Montel’s treatment of the Goursat pr…
This paper evaluates paleomagnetism as a method for correlating and subdividing sedimentary sequences, using oriented samples from Pliocene deposits in Western Turkmenia. Measurements of natural remanent magnetization and magnetic susceptibility in red-bed and related sections show stratigraphically…
This study examines how the degree of deformation affects ozone cracking in vulcanized rubbers, addressing contradictory earlier reports on critical deformation. Using an objective method based on effective crack depth calculated from stress relaxation during ozonation, the authors compare natural r…
This paper extends an organomagnesium approach to the synthesis of carbon to carbon derivatives of carbohydrates, using acetochloromonoses prepared from acetylated sugars as starting materials. The authors report preparations of new aryl and allyl acetylated derivatives of galactose, xylose, and ara…
This study constructs a recrystallization diagram for first-grade molybdenum in order to relate grain size to cold deformation and annealing temperature, a relationship important for improving ductility through control of microstructure. Vacuum arc-cast, carbon-deoxidized molybdenum was forged, anne…
This study examines the mechanism of polarization in the polarography of simple nickel and cobalt ions, whose irreversible waves had been reported with inconsistent half-wave potentials. Polarographic measurements at 25 degrees C were made in nitrate, perchlorate, and sulfate supporting electrolytes…
The paper analyzes the propagation of a heat wave whose shape is close to spherical in a medium with thermal conductivity depending as a power of temperature and with density differing slightly from a constant. Starting from the nonlinear heat equation in spherical coordinates and the known self-sim…
This study examines the conversion of trimethyllevoglucosan, prepared from levoglucosan obtained by vacuum dry distillation of starch, into aromatic products under the action of metallic sodium in liquid ammonia. By modifying reaction handling and product isolation, the authors increased the phenol …
This paper examines narrow X-ray diffraction lines observed in cokes and other carbonaceous substances calcined at 1700 to 1800 degrees, lines that had sometimes been attributed to a special graphite modification or to the onset of graphitization. Comparing line positions with graphite spacings and …
This paper applies Dorodnitsyn’s approximate numerical method for reducing two-dimensional nonlinear gas-dynamic problems to ordinary differential equations to the flow of a sonic gas stream past ellipses. The mixed potential motion upstream of the boundary characteristics is formulated in elliptic …
The Conference on High-Energy Particle Physics took place in Moscow from May 14 to 22, 1956.
