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 the periodic variation of isotope exchange beta factors in diatomic molecules, focusing on hydrides and extending the discussion to other monovalent elements. Using statistical expressions for beta factors, vibrational frequency relations, and the empirical Guggenheimer formula, …
The paper analyzes how the surface coverage of an organic adsorbate at maxima of differential capacitance curves depends on electrode potential and concentration within Frumkin adsorption theory. Assuming constant double-layer capacitances and a constant attraction parameter, the authors derive cond…
This paper examines the use of thermomechanical curves to estimate the molecular weight of linear polymers, focusing on natural rubber. Because conventional determination of the flow temperature is difficult and may introduce large errors, the authors propose using the more reproducible temperature …
This paper interprets differences in Mössbauer resonance absorption spectra for three low-spin iron(II) complexes with related thiosemicarbazone diacetyloxime ligands whose nearest coordination environment is formally the same. Using a qualitative molecular-orbital treatment that includes metal-liga…
This paper studies iterative averaging operators for functions on bounded plane domains, where the averaging radius varies with position and tends to zero at the boundary so that averaging sets remain inside the domain. It establishes basic order, linearity, boundedness, and equicontinuity propertie…
This paper examines the local structure of measurable functions at points where an asymptotic derivative does not exist, focusing on densities of sets determined by finite difference quotients. It constructs a measurable finite function on the unit interval, using an expansion into specially refined…
This study examines how rare-earth oxide amphotericity and ionic size affect reactions with alkaline-earth oxides, focusing on strontium oxide with La, Sm, Dy, and Yb oxides and selected reactions involving CaO and BaO. Mixtures were calcined in air and analyzed by X-ray phase methods to identify re…
This paper studies first boundary value problems for classes of semibounded linear differential operators whose structure is described by convex polyhedra associated with the exponents of their symbols. It introduces principal and leading faces of these polyhedra and proves comparison estimates for …
This study examines whether catalytic dehydrogenation of n-butylenes to divinyl can be carried out in a pulse chromatographic regime, where reaction components are separated as zones while passing through an alumina-chromia catalyst. Using gas chromatographic experiments with mixtures and isolated b…
This paper studies the equivalence classification of pencils of quadratic forms under linear changes of variables and linear transformations of generators, with emphasis on ternary forms over the complex numbers. It introduces general reductions using essential variables and generators, dual pencils…
This study examines whether the intermolecular ordering of polyvinyl alcohol films affects their electrophysical properties, a question relevant to mechanisms of electrical conductivity in polymers. Films with different structural states were prepared by annealing and by stretching at elevated tempe…
This paper examines stability of established and forced processes in nonlinear pulse automatic systems, extending earlier frequency based criteria for stability of an equilibrium position in the large. By representing deviations from a given process as the state of an associated nonstationary pulse …
This note develops a general construction of duality for admissible functors on a broad class of concrete categories, including abelian groups, topological spaces, sets, partially ordered sets, structures, and suitably restricted Banach spaces. It introduces the notion of a D-category with internal …
This study examines the purification of indium from tin and lead impurities by zone melting a eutectic mixture of indium chloride and sodium chloride, a route intended to overcome the poor impurity separation obtained during zone melting of metallic indium. Experiments were performed in sealed glass…
The paper constructs two sequent variants of the classical predicate calculus, denoted E1 and E'1, in which every derivable sequent has a unique derivation tree. Building on earlier calculi E0 and E'0, it introduces marked formulas and carefully constrained quantifier rules, including deterministic …
The paper studies a Dirichlet problem for a class of quasilinear elliptic equations in a bounded domain under monotonicity, growth, and summability assumptions that allow logarithmic nonlinear growth. It applies a Friedrichs involution transformation to replace the original formulation by an equival…
The paper studies the ordering of nested, multilayer computational cycles in which some layers are commutative, with the aim of minimizing the total realization time. It first proves an ordering rule for a polynomial formed from prescribed pairs of positive parameters, showing that a minimum is obta…
This note studies when a topological space that is the union of at most a cardinal τ many subspaces of weight at most τ must itself have weight at most τ. It extends earlier results on locally bicompact spaces by giving criteria involving networks, bicompactifications with small remainders, local ne…
This study examines the luminescence of a synthesized uranyl phthalocyanine complex and the influence of the uranyl ion on the phthalocyanine chromophore. Infrared, electronic absorption, and luminescence spectra in several solvents and at different temperatures are compared with spectra of metal-fr…
This paper investigates heterogeneous catalysts for low pressure ethylene polymerization prepared by treating mixtures of metallic aluminum and titanium with chlorine or dry hydrogen chloride in benzene. Experiments varying metal ratio, chlorination conditions, temperature, pressure, and Cl/Al ratio…
This study examines how nitrogen-containing compounds affect the titanium tetrachloride, triethylaluminum catalytic system used for isoprene polymerization. Isoprene was polymerized in heptane under varied orders of addition of phenyl-beta-naphthylamine, and selected experiments were also performed …
The paper analyzes the gas motion produced by a short-duration plane impact or explosion in an inhomogeneous atmosphere whose initial density follows a barometric law and whose initial pressure is zero. Using dimensional arguments and Lagrangian gas-dynamic equations, it derives a self-similar formu…
This paper studies stationary traveling-wave solutions for a one-dimensional combustion model coupling temperature and active-substance concentration with diffusion and reaction terms. By reducing the partial differential system to an ordinary differential boundary-value problem and analyzing its ph…
This study examines how the frequency and voltage of sinusoidal alternating current affect corrosion and passivation of titanium in 10 N sulfuric acid. Using VT-1 sheet titanium electrodes, the authors measured anodic and cathodic potential amplitudes, phase shifts, Faradaic and capacitive current c…
The study examines the interaction of metallic lanthanum with molten lanthanum trichloride and the equilibrium of the reaction forming lanthanum dichloride. Direct chemical analysis of equilibrated melts, emf measurements of concentration cells, and thermal analysis of the La, LaCl3 system were used…
This paper examines whether a quantum particle may be assigned a continuous but nonclassical trajectory, with a first derivative interpreted as momentum and no second derivative or acceleration in the classical sense. Starting from the Wigner phase space formulation equivalent to the Schrödinger equ…
This paper studies conformal mappings of finitely multiply connected plane domains onto multisheeted canonical surfaces, allowing prescribed logarithmic and principal singular parts at interior points. It proves existence and uniqueness results for mappings whose boundary components go to straight l…
The paper studies higher order asymptotics for the distribution of the maximum likelihood estimator of a scalar shift parameter in densities of the form c exp(−F(x−θ)). Under smoothness, integrability, growth, and regularity assumptions on F, the authors derive an expansion for the distribution of t…
This paper reports the preparation and characterization of salts of diphenyl-o,o′-diphenylenammonium, presented as the first representatives of fully aromatic tetraarylammonium compounds. The compounds were obtained by diazotization of o-amino-o′-diphenylaminodiphenyl in acetic acid, followed by ani…
This paper describes syntheses of alkyl furyl sulfides using organolithium compounds of the furan series, emphasizing a route that avoids preliminary halogenation required for organomagnesium intermediates. Furyl lithium or substituted furyl lithium compounds are treated with sulfur followed by alky…
This paper addresses whether the class of RI*-groups is radical, equivalently whether it coincides with Baer’s class of subsolvable groups in the minimal radical class generated by abelian groups. Using an Ado-McLain type group constructed from matrix-like generators indexed by rational numbers, the…
This note introduces classes of completely regular spaces defined by refining systems of covers, including spaces with tau-locally finite and tau-star finite bases, and relates them to generalized forms of metrizable, paracompact, and strongly paracompact spaces. It proves embedding and universality…
This study examines how bromination alters the ultraviolet absorption spectra of purine and pyrimidine bases and what these changes indicate about the reaction mechanism. Using acidic bromine water, spectrophotometry, kinetic observations, and paper chromatography, the authors compare uracil, cytosi…
The paper addresses the computation of the mathematical expectation of a quasi-additive function defined on random paths in a finite multigraph with specified transition probabilities at each vertex. It defines quasi-additivity through an associated multiplicative path function and develops formulas…
This study examines changes in infrared absorption spectra during polymorphic transformation of tristearin from a rapidly cooled glassy state to crystalline alpha and beta forms. Thin films were prepared between KBr plates and recorded with thermostatic control in the 3000 to 700 cm−1 region after q…
The paper formulates the drawing of products, especially single crystals, from a melt as an optimal control problem for systems with distributed parameters. It develops a mathematical description combining capillary surface equilibrium, heat balance, crystallization-front dynamics, anisotropic heat …
This paper examines the effect of scandium oxide additions on spinel ferrites in the MgO, MnO, Fe2O3 system intended for matrix and register memory applications. The authors prepared ferrites over a range of oxide compositions and measured pulse, static magnetic, and electrical characteristics, comp…
The study examines reactions of vinyl and substituted vinyl phosphites with bromine and phosphorus pentachloride as routes to halogen anhydrides of alpha,beta-alkenylphosphoric acids. Bromination of phosphites containing only alkenyl groups or phenyl and alkenyl groups gives crystalline quasiphospho…
This study examines oxygen ionization on palladium electrodes in concentrated alkaline solution and relates the electrode activity to the properties of surface oxygen compounds. Polarographic measurements on palladium, platinum, and silver, together with cathodic charging curves after anodic oxide f…
This paper examines the liquid-phase autooxidation of p-dicyclohexylbenzene with oxygen in the presence of manganese resinate, with and without alkaline additives, as a model for studying dialkylbenzene oxidation. The authors follow oxygen uptake and iodometric hydroperoxide formation at different t…
This paper studies normal subgroups of the multiplicative group of a division ring, extending results related to the Cartan, Brauer, Hua theorem and Scott’s theorem on abelian normal subgroups modulo the center. Through a sequence of ring-theoretic and group-theoretic lemmas, it proves that locally …
The paper studies a generalized notion of periodic extension for functions in closed subspaces of L2 generated by exponential monomials associated with a complex sequence with finite multiplicities. It formulates the extension problem as a norm inequality on finite exponential sums and introduces re…
This paper examines the preferred conformation of benzalaniline and substituted aromatic anils, challenging the commonly assumed planar structure. Using a semiempirical LCAO molecular orbital calculation in the Hückel approximation, the authors compare planar, orthogonal, and intermediate arrangemen…
This paper examines whether gravitational convection within boreholes and conductive heat transfer along casing pipes significantly distort natural subsurface temperature distributions. Frolov describes field experiments comparing deep cased boreholes with nearby shallow uncased control boreholes, u…
This study compares the catalytic behavior of high-molecular-weight polystyrenesulfonic acid with that of the low-molecular-weight model acid toluenesulfonic acid in the hydrolysis of ethyl acetate in aqueous solution. Polystyrenesulfonic acid was prepared by photopolymerization, and hydrolysis kine…
The paper studies the approximate realization of continuous functions by finite automata, extending Shannon’s counting arguments for discrete functions and Kolmogorov and Tikhomirov’s theory of epsilon entropy. It defines discrete functions that approximate continuous functions on grids and derives …
The paper addresses the experimentally observed decrease in molecular hydrogen and hydrogen peroxide yields during water radiolysis as the concentration of radical acceptors increases. Using the spur model of radiolysis, it treats the diffusion and recombination of H and OH radicals in an isolated s…
The paper studies the asymptotic distribution of integer matrices of order n with fixed determinant N after normalization to determinant one, restricted to a Jordan-measurable domain in the unimodular group. It proves an asymptotic formula for the number of such matrices, first for completely primit…
This paper develops a method for determining the adsorption energy of alkali-metal ions on single-crystal metal surfaces as a function of surface coverage. The authors model adsorbed atoms as partially ionized adions, account for image charges, dipole and quadrupole interactions in the adsorbed laye…
