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
Direct calorimetric measurements were used to determine differential heats of oxygen adsorption on porous silver at 110°C and to examine how small amounts of chemisorbed sulfur alter these heats. Silver samples were pretreated with hydrogen, oxygen was admitted in small portions, and sulfur was intr…
This paper examines the coordination sensitivity of amino-group wagging vibrations in infrared spectra of cyclic ethylenediamine complexes. Extending an earlier argument for ammonia complexes, it relates increases in the wagging frequency to fixation of the nitrogen lone pair by metal coordination, …
The paper establishes a necessary and sufficient criterion for exponential growth estimates of solutions to a class of hyperbolic partial differential-difference equations in a complex Banach space, with variable compact operator coefficients and bounded delays. The criterion is expressed through th…
This paper examines the mechanism underlying mutarotation and gel formation in gelatin solutions after cooling from the denatured state. Using polarimetric measurements over a wide range of gelatin concentrations in water and citrate buffer, the authors show that the initial rate of increase in levo…
This paper examines the mechanism of synergistic inhibition in liquid-phase oxidation when both inhibitors are capable of reacting with chain-carrying radicals. Using initiated ethylbenzene oxidation at 70 degrees, the authors measured oxygen absorption and inhibitor consumption for mixtures of an a…
The paper examines whether the mean chlorine-35 nuclear quadrupole resonance frequency at 77 K can quantify inductive substituent effects in organylchlorosilanes. Using published and measured NQR data for compounds of the RSiCl3, RR'SiCl2, and RR'R''SiCl series, the authors correlate mean resonance …
The study examines vibrational spectra of tetrahedral beryllium complex ions Be(NH3)4 2+ and Be(H2O)4 2+ in crystalline tetraammine beryllium chloride and beryllium sulfate tetrahydrate, with additional isotope substitution using deuterated ammonia and water. Infrared absorption and Raman spectra ar…
The paper develops self-consistent descriptions of charged-particle systems that include both “free” charges, for which correlations are neglected, and “bound” charges, where electron-ion pairing is important, as in weakly ionized hydrogen plasma. Starting from microscopic Liouville and field equati…
The paper develops an integral operator approach for hereditary creep problems using Volterra operators with Rabotnov type kernels. It reviews known algebraic and differentiation properties of these operators and proves, by induction, a formula expressing products of arbitrary powers of operators wi…
This note studies boundary limit relations for polynomials orthonormal on the unit circle with respect to an absolutely continuous or locally absolutely continuous measure. It gives new sufficient conditions, expressed through integral and ordinary moduli of continuity of the weight and its reciproc…
This note studies an oblique derivative boundary value problem for harmonic functions in the unit ball, with Hölder continuous coefficients on the sphere depending on \(x^2+y^2\) and \(z\). By expanding the solution and boundary data in angular Fourier series, the problem is reduced to a family of t…
This paper examines how satellite-derived cloudiness fields can be used to infer dynamical meteorological quantities in regions with sparse conventional observations. It proposes a regression method relating Fourier coefficients of total cloud amount to geostrophic vorticity, then uses Poisson equat…
This study investigates the low-temperature spectral distribution of the internal photoeffect in CdSe and CdS single crystals, with emphasis on testing excitonic explanations of photosensitivity near the long-wavelength edge of fundamental absorption. Using polarized-light photocurrent measurements …
This paper determines the stabilization energy of a quasiaromatic six-membered ring formed through intramolecular hydrogen bonding and electron delocalization in the enol form of dibenzoylmethane. The authors measured the heats of combustion of dibenzoylmethane and the ethyl ether of its enolic form…
The paper reports a single-crystal X-ray determination of the structure of orthorhombic gamma-Na2BeF4, undertaken because this compound was expected to model gamma-Ca2SiO4 and direct structural data had been lacking. Using limited zero-level diffraction photographs, Patterson analysis, and compariso…
This paper studies stationary one-dimensional combustion waves governed by a nonlinear temperature and concentration system with cut-off reaction rate and piecewise constant thermal conductivity and diffusion coefficients. Building on earlier uniqueness results for constant coefficients when the con…
A series of 2-arylamino-4-phenyl-5-benzoylthiazoles was prepared by reacting dibenzoylbromomethane with potassium thiocyanate in ethanol in the presence of aromatic amines, giving the target thiazoles in moderate to good yields. The structure of the anilino derivative was confirmed by independent sy…
This paper examines the hydrogenation of cis-1,4-polybutadiene using hydrocarbon-soluble Ziegler-type organometallic catalysts as an alternative to heterogeneous metal catalysts. The authors tested systems based on triisobutylaluminum with cobalt, chromium, or titanium compounds in decalin at 80°C, …
This paper examines rapid activation analysis of praseodymium and neodymium in rare-earth materials using 14 MeV neutrons and the dominant inelastic (n,2n) reaction. The authors argue that this approach reduces problems associated with slow-neutron capture analysis, especially self-shielding by elem…
This study examines low-temperature ignition of combustible gas and vapor mixtures brought into contact with heated solid bodies under free-convection conditions, with attention to whether nonthermal autocatalytic processes can lower ignition temperatures. Experiments in thermostated explosion chamb…
The paper studies spaces that admit, for each open cover, weak mappings into metric spaces, where point preimages are contained in elements of the cover, and relates these spaces to inverse spectra of metric spaces. It gives necessary and sufficient conditions for the existence of such mappings in t…
This study examines the energy positions and line shapes of titanium X-ray Kα1,2 and Kβ1 emission lines in titanium oxides across compositions from lower oxides to rutile. Oxide samples of controlled composition were prepared and characterized, including by magnetic susceptibility for phase assessme…
This study examines the formation of supramolecular structure in solutions of the helical polypeptide poly-gamma-benzyl-L-glutamate in dioxane using small-angle scattering of polarized light, with parallel microscopic observation. The authors follow concentration- and time-dependent ordering, findin…
This study compares the electrical and thermal properties of electronic-conducting lead sulfide in single-crystal and pressed polycrystalline forms at room temperature. Single crystals were grown from the melt, pressed specimens were prepared from ground crystals and annealed, and electrical conduct…
This paper investigates electron paramagnetic resonance spectra of manganese impurities in As, Se, Ge chalcogenide glasses with relatively high germanium contents. Glasses containing 1 at.% Mn were synthesized and measured at 293 and 77 K, with additional temperature dependent observations, to relat…
This paper examines the use of a ruby optical generator as a high brightness pulsed illumination source for bubble chamber photography. The authors describe an autocollimation illumination and photographic arrangement using a ruby laser with a concentric resonator, then test it on a glass bubble mod…
This paper analyzes how chain transfer with scission affects the molecular weight distribution of polymers formed in ionic polymerization systems with heteroatoms in the chain. The authors formulate kinetic equations for random reactions between active macromolecules and polymer chains, treating the…
This paper analyzes the torsional loss of stability of a strictly convex shell of revolution subjected to a moment produced by uniformly distributed tangential edge forces. Using a postcritical approximation in which the deformation is treated as nearly isometric and the elastic energy is concentrat…
This paper reports radio observations aimed at detecting emission from an excited hydrogen recombination line in the HII region NGC 6618, the Omega Nebula, corresponding to transitions between principal quantum levels 91 and 90. Using a 22-meter radio telescope and a null spectral radiometer near 88…
This paper examines how internal viscosity affects the mechanical behavior of anisotropically hardening plastic media. It generalizes an elastic-plastic hardening model by adding a viscous element that governs relaxation of residual microstresses, formulates the corresponding yield condition and ass…
This chronicle reports on the inter-university symposium on the qualitative theory of differential equations and its applications, held in Samarkand in October 1964. It summarizes the organization of the meeting, its three thematic sections, and the principal plenary reports on singular points in mu…
This study examines acid-catalyzed cyclization of alpha- and beta-monocyclofarnesylacetones as a route to stereospecific formation of polycyclic isoprenoid derivatives. Using infrared and NMR spectroscopy, gas-liquid chromatography, and preparative isolation, the authors show that the alpha isomer g…
This paper describes an addressing method for machine dictionaries in which compressed word codes are used directly as random-access memory addresses. It outlines a letter-by-letter compression procedure based on shifted modulo-2 addition of letter codes chosen with regard to probabilistic and stati…
This paper studies nonlinear parabolic equations in nondivergence form on a space-time rectangle, with boundary and initial conditions formulated in Sobolev-type spaces. Using Galerkin approximations, a priori estimates, monotonicity arguments, and compactness results, it proves homeomorphism theore…
This paper examines the statistical distribution of right- and left-handed forms in inorganic crystallization, using epsomite crystals grown from aqueous solution as the main experimental case. Handedness indices from multiple crystallization experiments were grouped into distribution curves under v…
This paper develops a statistical theory for acceleration of fast charged particles by weak, stationary magnetohydrodynamic turbulence in a rarefied plasma, focusing on low-frequency Alfvén waves propagating nearly along a background magnetic field. Using classical perturbation theory applied to the…
This paper studies binary codes for channels in which symbols may be deleted, inserted, or reversed, extending the usual substitution error model. It formulates deletion and insertion correction in metric terms, proves equivalences among correction notions for fixed length codes, and derives bounds …
This paper examines how the energy spectrum of oceanic turbulence may differ from the Kolmogorov minus 5/3 law when external energy is supplied not only at the largest scales but also across selected ranges of motion. Using analytical filtering of a 30 day current meter record from the Atlantic Ocea…
The paper addresses the difficulty of determining combustion kinetic properties of pulverized power fuels under conditions relevant to flame firing, where coal structure and pore characteristics change during burnout. It argues for using the coefficient of reactive gas exchange as an effective kinet…
The paper develops an analytical treatment of a simple electromagnetic vibrator whose magnet winding is supplied directly by a sinusoidal voltage source without a rectifier. Starting from coupled electrical, energy, and mechanical equations, it assumes a linear magnetic characteristic and represents…
This paper examines the amplitude and frequency behavior of a single-stroke electromagnetic vibrator with bias magnetization when driven by a pulsating current source, focusing on near-resonance regimes where common small-displacement approximations are inadequate. Starting from the nonlinear equati…
This paper reports experiments on plastic deformation of thin-walled steel 40 tubular specimens subjected to combined axial force, internal pressure, and torque. For loading programs with constant stress intensity but different rotations and ratios of principal stresses, the strain intensity increas…
This study examines crystallization, cooling behavior, electrical resistivity, and linear dimensional changes in cast high-speed steels of P9 and P18 types with varying aluminum additions. The authors melted steels in an induction furnace, cast cylindrical specimens in a dry cast-iron mold, and auto…
This paper investigates the stress state in the cutting zone during shear chip formation, a problem difficult to address experimentally because of the small size and steep stress gradients of the plastic region. The authors develop and apply a hardness based method, using microhardness distributions…
This paper investigates the production of replaceable cutting elements for sleeper-cutting circular saws using centrifugal casting in metal molds, as an alternative to investment casting and lower-wear steels. The authors designed a four-cavity quick-release mold, cast R9 high-speed steel under vari…
This paper presents the design and laboratory evaluation of a hand-held pneumatic chipping hammer intended to reduce occupational vibration exposure. The proposed MPV-series design separates the handle from the barrel with a conical spring, uses a vibration-damping bushing with rubber sleeves to sof…
This paper presents a computational method for determining electrodynamic forces in the end windings of single-layer concentric stator windings, especially under severe transient conditions such as sudden short circuits in surge generators. The authors divide the end winding into geometric zones, de…
This paper describes a manufacturing process for the magnetic core of a compact 3 MeV stereobetatron built for increased-frequency operation using 0.08 mm E310 electrical steel strip. It details continuous strip cleaning, varnish insulation, winding, baking, cutting, and assembly methods for semitor…
