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 paper examines whether gray cast iron significantly strain hardens during the plastic deformation associated with machining, a question important for calculating cutting forces. It critiques earlier use of compression polytropes for gray cast iron and reports experiments using copper collars an…
This paper develops dimensionless relations for the dynamics of metal cutting, focusing on how cutting forces depend on shear angle, rake angle, friction on the rake face, and plastic deformation during chip formation. Using force diagrams and a proposed graphical construction for the resultant forc…
This paper examines Briks’s proposed scheme for plane chip formation, in which the cut metal layer is assumed to deform through successive straight slip lines converging at the tool tip. Using Lévy’s stress equations, the Mises yield condition, and boundary conditions on the free outer boundary of t…
This paper investigates the formation of built-up edge during turning of several cast aluminum alloys and its dependence on cutting speed, feed, tool rake angle, and alloy properties. Using direct optical measurement under the chip, chip-root metallography, temperature measurement, chip shrinkage da…
This paper critically examines the Krivoukhov-Belousov theoretical equation for calculating the principal cutting force in metal machining. By comparing the equation’s predicted dependence on cutting speed, rake angle, friction coefficient, thermal properties, hardness, and workpiece geometry with e…
This article investigates the machinability of stainless steel 1Kh18N9T in milling with high-speed steel cutters, addressing the rapid chipping and limited life of carbide tools under interrupted cutting conditions. Endurance tests on a vertical milling machine compared forged P18 high-speed steel w…
This paper investigates the machinability of austenitic stainless steel 1Kh18N9T during face milling in cold and preheated states using high speed steel and carbide tools. Experiments compare tool materials, cutter geometry, cutting speed, feed, heating temperature, tool life, wear, cutting forces, …
The paper examines numerical criteria used to assess imbalance in multicylinder reciprocating internal combustion engines, focusing on the Klimov and Stechkin coefficients for unbalanced inertia forces and moments. By modeling forced oscillations of an engine and foundation system and comparing actu…
This paper reports four nuclear emulsion observations in which a stopped multiply charged fragment decays into two alpha particles and a proton after irradiation by high energy protons. Track ranges, particle identifications, momentum balance, and estimates of kinetic and excitation energies are use…
The paper studies when a symmetric two-dimensional density of spectral form defines a stationary Markov process, focusing on the role of finite versus infinite expansions in eigenfunctions. It proves that if the a priori density and eigenfunctions are continuous and the density is positive on the in…
This note reports an experimental study of fragmentation on light nuclei induced by protons with energies below and near the meson production threshold. Nuclear photoemulsions irradiated with 100, 200, and 350 MeV proton beams were examined for stars containing multiply charged fragments, yielding f…
Solubility isotherms at 0°C were determined for the systems sodium borohydride, sodium chloride, water and sodium borohydride, sodium bromide, water, using 1% sodium hydroxide solution to suppress borohydride hydrolysis. Liquid and solid phases were analyzed by titration, Schreinemakers construction…
This study investigates the mechanism of cathodic reduction of allyl alcohol on platinized platinum electrodes in acidic and alkaline media. The authors combine polarization measurements, gas volume and chromatographic product analysis, adsorption studies, reactions with preadsorbed hydrogen, and su…
The paper examines exceptional cases in integral equations of convolution type with two kernels, including equations of the first kind, where the associated Riemann boundary-value problem has zeros or poles in its coefficient, especially at infinity and at common zeros of transformed kernels. Using …
This paper solves a Riemann boundary value problem for piecewise holomorphic automorphic functions with prescribed poles and a discontinuity line in a fundamental domain of a fractional linear group. It treats the case in which the group is characterized not by one invariant but by two simple automo…
This note proves that, for each dimension n, the number of topologically distinct regular normal partitions of n-dimensional Euclidean space by convex stereohedra is bounded by a function depending only on n. The argument reduces the problem to bounding the number of faces of a stereohedron and the …
This note gives necessary and sufficient conditions for stability, in the l2 norm, of linear systems of difference equations with bounded shifts. Using the Fourier transform, the system is reduced to powers of a parameter dependent matrix, and an analytic similarity transformation is used to put the…
This letter comments on G. E. James-Levy’s paper on general anamorphosis, arguing that several of its assertions and constructions are incorrect or insufficiently justified. The authors identify problems with assumed functional representations, criteria for excluding rectilinear scales, and the deri…
This study examines the fine structure of iron K absorption spectra in ferrocene and ferricinium chloride as a test of theoretical descriptions of electronic structure in aromatic metal complexes. Experimental spectra were recorded with a focusing reflection X-ray spectrograph and interpreted using …
This note analyzes isothermal distillation in a mixture of monodisperse pure water fog droplets and droplets of a dilute solution, driven by the difference in saturated water vapor concentration over the two droplet types. A system of kinetic equations for droplet radii and vapor density is formulat…
This note studies semiboundedness and discreteness of the spectrum for one-dimensional differential operators of the form a constant-sign even derivative plus a real potential. Using localization identities and estimates on variational eigenvalues over finite intervals, it proves a sufficient condit…
This paper investigates the use of P-amino acid derivatives of adenosine 5′-phosphate as activated intermediates for synthesizing nucleotide coenzymes and related diphosphate compounds. The authors prepare a stable triethylammonium salt of a phosphophenylalanine adenosine derivative, convert it to t…
This paper examines which stage controls the combustion rate of powders and explosives in a simplified multistage model involving reactions in the condensed-phase surface layer and in the gas or smoke-gas phase. It argues that the leading stage can shift with initial temperature or pressure, and der…
This paper studies singular Tricomi boundary value problems for a mixed type equation near both a finite singular line and an infinitely remote singular line. Using a Duhamel principle, the solutions are represented through discontinuous kernels expressible by modified incomplete Euler beta function…
The paper proposes an iterative approach to a linear programming problem by replacing the original minimization over a closed convex polyhedral set with a perturbed auxiliary problem involving a positive definite matrix and a small parameter. Existence, boundedness, uniqueness, continuity in the par…
The paper formulates a hydrodynamic framework for nonstationary atmospheric processes of planetary scale intended for long-range weather prediction. It extends earlier climate theory by coupling spherical equations for vorticity, balance, continuity, and quasistatic thermodynamics with a heat-inflow…
This paper examines whether redistribution of alloy components under a temperature gradient can be energetically favorable, independently of assumptions about differing atomic velocities in thermodiffusion. Considering a solid rod with limited impurity solubility, one part at a lower temperature and…
This paper examines why adsorption isosteres are often experimentally close to straight lines in coordinates of reciprocal temperature and logarithmic pressure, a behavior not generally implied by many adsorption isotherm equations. Using the thermal equations of potential theory for adsorbents of t…
This paper addresses the long-range forecasting of mean monthly anomalies of vertical air-motion velocities over the Northern Hemisphere using hydrodynamic methods and contemporary aerological data. Starting from an approximate expression for vertical velocity in terms of the stream function and tem…
This study examines the kinetics of catalytic dehydrogenation of ethylbenzene to styrene over a mixed oxide catalyst in a flow system with steam dilution. Experiments at 520 to 560°C measured styrene and hydrogen formation, determined relative adsorption coefficients for styrene and hydrogen from bi…
This study examines the interfacial polycondensation of pyridine-2,6-dicarboxylic acid dichloride with hexamethylenediamine to obtain a pyridine-containing polyamide, using benzene and aqueous alkaline media at room temperature with stirring. The authors describe polymer formation at the phase bound…
This note studies elliptic differential operators on two-dimensional plane domains and smooth orientable closed surfaces through the algebraic and topological structure of their characteristic polynomials. It shows that on closed orientable surfaces not homeomorphic to a torus, every elliptic polyno…
This paper examines why low molecular weight substances dissolved in high polymers often crystallize preferentially at the polymer gas interface, a phenomenon known as blooming. Using the sulfur polybutadiene system and radioactive sulfur labeling, the authors measured surface crystallization kineti…
The study examines whether the aminonitrile rearrangement previously observed in the reaction of acrolein with unsymmetrical dialkylhydrazines also occurs with related unsaturated carbonyl compounds. Condensation reactions of crotonaldehyde, alpha-methylacrolein, and methyl vinyl ketone with dimethy…
This note studies infinite-dimensional metric spaces and transfinite dimension, using Sklyarenko representations to relate noncompact cases to compact weakly infinite-dimensional components. It proves that every infinite-dimensional metric space is either strongly infinite-dimensional or becomes str…
The paper studies the Dirichlet problem for the nonlinear elliptic equation ΔU = U² in a bounded planar domain with continuous boundary data. Using a variational argument, eigenfunction expansions of the Green kernel, and the Ritz method, it first proves the existence of a nontrivial solution for ze…
This paper reports centimeter wavelength observations of the radio source Virgo A, associated with NGC 4486, made with the Pulkovo radio telescope at 9.4 and 8.7 cm. The measurements indicate that the radio source is unresolved in right ascension at 8.7 cm, with an angular size not exceeding about 1…
The paper studies the index of boundary value problems for invariant elliptic first order systems that generalize the inhomogeneous Cauchy-Riemann equations to higher dimensions. Using a Hodge-Friedrichs theorem for harmonic differential forms on the doubled manifold of a bounded Euclidean domain, i…
This paper examines the preparation and properties of beta,beta,beta-trichloroethyl esters of several trivalent arsenic acids, including arsenous, ethylarsinous, phenylarsinous, and diphenylarsinous acids. The authors show that transesterification of existing arsenite or arsinite esters with beta,be…
This paper examines whether the invariance principle for linear automatic control systems with constant parameters can be extended to systems whose parameters vary in time. It reformulates parameter deviations as internal disturbances and reduces the variable-parameter system to an equivalent consta…
This paper examines the structures of complex silicon oxygen anions in barium silicates, especially high temperature barium metasilicate and the compound 2BaO·3SiO2, using infrared absorption spectra supplemented by comparison with known lattice periods and related silicate structures. The spectrum …
This paper reports experiments on the polymerization of tetracyanoethylene, a tetrasubstituted ethylene normally resistant to radical-chain polymerization because of steric hindrance. The authors test alcohols, phenol, amines, amides, and related compounds as initiators at 200 degrees C, finding tha…
The paper studies singular Goursat problems for a class of hyperbolic equations with a singular characteristic at zero and, by transformation, at infinity. It develops Duhamel-type representations with discontinuous Riemann kernels, proves uniqueness under sign conditions, and derives transformation…
This paper studies two-dimensional free finite standing oscillations of the interface between two unbounded ideal incompressible heavy fluids of different densities. Using Lagrangian variables, it formulates the nonlinear boundary-value problem with pressure continuity, kinematic matching at the int…
This study examines the adsorption behavior of hydrogen ions at negatively charged mercury, electrolyte interfaces by comparing double-layer differential capacitance and anion electroreduction kinetics in acidic and alkali-metal salt solutions. Measurements on a dropping mercury electrode in hydroch…
This paper reports a stereospecific synthesis of the pyrrolizidine alkaloid 1-methylenepyrrolizidine from natural L-proline in order to determine its absolute configuration and relate it to other pyrrolizidine bases. The route proceeds through ethyl L-prolinate, Michael addition to methyl acrylate, …
The paper addresses the optimization of programs for complex logical problems on computing machines, focusing on how program schemes can be transformed to make more efficient use of information obtained from logical conditions. It formalizes schemes in terms of logical and resultant acts, defines lo…
The paper establishes criteria for reflexivity of a Banach space in terms of the behavior of its unit ball under weaker compatible topologies. Using the characteristic of weakly dense subspaces of the dual and a formula involving annihilators in the bidual, it proves that a Banach space is reflexive…
This paper investigates dislocation motion in single crystals of antimony using selective etching under load and repeated etching after deformation or annealing. The observations show individual dislocation trajectories along the three crystallographic slip directions in the (111) observation plane,…
