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 continental Cretaceous deposits of the Chulym-Yenisei Depression and proposes their stratigraphic subdivision on the basis of lithology, fossil plants and invertebrates, microfauna, mineral composition, facies relations, and drilling data. It describes the Ilek and Kiya forma…
This paper investigates whether eutectic compositions in the KCl, K2CrO4 and Bi, Sn systems show distinctive mechanical and surface properties during mutual grinding with abrasive powder. Using Kuznetsov’s mutual grinding method, the authors measured relative wear against standard crystals and used …
This paper proposes molecular concentration, defined as density divided by molecular weight multiplied by 1000, as an experimentally accessible parameter for comparing multiple physical properties of crystals and related substances. Using tabulated literature data for alkali halide crystals, alkalin…
This article addresses the apparent paradox that certain white metallic oxides in high-temperature flames can emit blue or green visible radiation more intensely than a black oxide reference, although their glow has been argued to be thermal rather than luminescent. Sokolov explains this effect usin…
This paper describes the development of a practical fabrication procedure for sealed-off glass vacuum chambers for a 15 MeV betatron, intended to replace continuously pumped accelerating chambers and simplify operation. It details preparatory operations, including electrical contact formation, aquad…
This paper examines how the position of the cathode inside the control electrode affects beam focusing in a betatron electron gun, a component identified as important for improving beam intensity. Using an enlarged electrode model in an electrolytic tank, the author mapped electrostatic fields for s…
The paper analyzes electron bunching in a cylindrical klystron whose radially diverging disk-shaped electron beam is intended to increase total beam current without relying on very high accelerating voltages. By modifying the charge-conservation equation for cylindrical geometry, it derives a space-…
This paper develops a calculation method for electron motion in the input gap of a klystron under large high-frequency voltages, neglecting space charge and edge effects. Starting from the electron equation of motion, it derives implicit relations for transit angle, velocity, and energy, gives graph…
This paper examines statistical laws governing brightness variations along the sweep line of a cathode-ray indicator with beam brightness modulation, motivated by the evaluation of radar noise immunity and signal observability. It derives general transformations from voltage distribution laws to bri…
This paper examines how resonant radio reflection from meteor trails can distort radar pulse signals beyond the effects of receiver bandwidth. Using existing theory for transverse polarization and treating the ionized trail as a frequency-dependent reflecting system, it analyzes reflection coefficie…
This paper examines the use of pulsed self-oscillators as transmitters in meter-band radar stations, focusing on the causes and consequences of carrier-frequency instability. Using a two-stroke, two-circuit common-anode oscillator as an example, it analyzes frequency setting errors, the dependence o…
The paper argues that standard tests of television camera tubes insufficiently characterize their performance when transmitting moving images. It proposes adding measurements of the transient response produced by a moving boundary between dark and light fields, using line selection, synchronized tim…
This paper examines the loss of sharpness and definition in television images of moving objects, especially in systems using pickup tubes with energy storage. It develops a model of the television transition characteristic that incorporates optical defocusing and velocity smear, approximating system…
This paper examines wireless transfer of ultrahigh-frequency energy to a passive reradiator, motivated by losses and practical limitations of cables, waveguides, and single-wire lines for elevated relay antennas. It proposes using an ellipsoidal reflector, rather than a parabolic reflector, to focus…
This paper develops a nonlinear theory for the cathode-coupled oscillator, addressing limitations in earlier treatments that either used overly general oscillator models or parameter choices judged unsuitable for this circuit. It approximates the differential conductance of the cathode-coupled two-t…
This paper analyzes the admittance of the active two-terminal network formed by a cathode-coupled oscillator, with particular attention to the simultaneous influence of stray capacitances on negative conductance, dynamic capacitance, self-excitation, and frequency stability. Using equivalent current…
This paper analyzes how the envelope of a transmitted radar pulse and the resonance characteristic of a receiver affect the average hourly number of meteors detected by radio echo methods. Starting from Kaiser’s dependence of meteor counts on peak transmitted power and receiver threshold power, it d…
This paper analyzes how the average hourly number of meteors detected by a radar depends on the radar wavelength when receiver threshold power and pulsed operation are taken into account. Starting from Kaiser’s relation for normal reflection from meteor trails, it incorporates the wavelength depende…
This paper addresses the use of radar observations to determine the mass distribution of meteoric bodies, especially in the small mass range where visual observations are limited and subject to substantial correction. Building on Kaiser’s relation between meteor echo rates and radar parameters, it a…
This paper examines how to choose the optimal bandwidth of the linear part of a pulse radio receiver when the threshold for signal detection depends not only on the output signal-to-noise amplitude ratio but also on the relative durations of signal and noise pulses. It formulates observability as a …
This paper derives the radial brightness distribution on a cathode-ray tube screen during circular sweep when the deflecting voltage is fluctuating, or consists of a harmonic signal combined with fluctuations. Treating apparent brightness as proportional to the probability that the moving spot cover…
This paper studies the stability of characteristic exponents for nonlinear perturbations of diagonal linear systems of ordinary differential equations with bounded time-dependent coefficients. It argues that an integral separation condition on the diagonal coefficients is sufficient, without assumin…
This paper examines the limits of the Auwers-Skita rule, which relates the configuration of dialkylcyclane stereoisomers to boiling point, refractive index, density, and molecular refraction. Using literature data and the authors’ measurements for several series of 1,4-dialkylcyclohexanes, 1,2-dialk…
This study examines the reduction products of delta-3-carene oxide under catalytic hydrogenation with Raney nickel and by lithium aluminum hydride, with identification based on physical constants, derivative formation, mixed melting points, and oxidation or reduction comparisons. Detailed analysis s…
This paper analyzes how shock waves are amplified when they interact with a flame front in a combustible gas. The authors treat the flame front approximately as a contact discontinuity for refraction and reflection of weak shock waves, then model the additional strengthening caused by shock compress…
This paper studies zeros and oscillation of solutions of the higher order differential equation y^(n) + p(x)y = 0 with continuous coefficient on an interval or half-line. It proves comparison theorems showing that oscillatory behavior satisfying a stated condition is preserved under larger positive …
This paper develops a small-parameter method for solving operator equations in a Banach-type space by means of majorant power series. A preliminary scalar lemma gives existence, uniqueness, positivity, and convergence radius estimates for an analytic root of a majorizing equation, including converge…
The paper studies mapping properties of fractional negative powers of strongly invertible self-adjoint positive differential operators on bounded domains star-shaped with respect to a ball. Using Sobolev embedding results, refinements of fractional-order operator theorems, and inequalities for weigh…
This note studies the spectral multiplicity of dynamical systems generated by stationary Gaussian processes with continuous spectral measure. Using Itô’s decomposition of the Hilbert space of trajectory functionals into symmetric multiple integral components, it constructs examples of processes with…
This note studies an infinite system of nonlinear functional equations in the real Hilbert space l2, presented as a functional analogue of Lichtenstein’s nonlinear integral equation. A multilinear-type functional on the unit ball is defined by an infinite series with symmetric square-summable coeffi…
This paper derives jump conditions for shock waves in an ideal compressible fluid within general relativity, using integral forms of four-momentum and mass conservation together with Einstein’s equations. Applying Sedov’s method to a moving surface of strong discontinuity, it obtains general relatio…
The paper analyzes pure torsion of a circular prismatic bar weakened by a longitudinal elliptical hole whose axis is eccentric relative to the bar axis. Using complex-variable elasticity, conformal mapping of the ellipse exterior to a circle, and Sherman’s method, the boundary-value problem is reduc…
This paper studies boundary value problems for the Euler, Poisson, Darboux equation with data prescribed on the singular line. Three Cauchy-type problems are formulated for different ranges of the parameter, using analytic representations of solutions and conjugate solutions. The paper gives existen…
The paper studies geometric properties of mappings generated by regular solutions of first order elliptic systems and related second order elliptic equations with analytic coefficients. Using Vekua’s representation of solutions after analytic continuation to two complex variables, it constructs a fa…
This note studies the Cauchy problem for Sobolev type operator differential equations in a Hilbert space, allowing the inverse of the principal operator to be unbounded. It proves existence, uniqueness, and a stability estimate under boundedness and continuity assumptions on the products involving t…
This paper reports a compositional study of crude oil from well No. 92 of the Makhachkala field in the Caspian lowland. The authors determine elemental, physicochemical, fractional, and viscosity characteristics, then analyze gasoline fractions by distillation, aniline-point methods, sulfuric acid a…
This paper examines the liquid-state behavior of aluminum, gallium, and indium antimonides through measurements of the temperature dependence of magnetic susceptibility by the Faraday method. The authors compare the resulting susceptibility curves with previously reported viscosity, density, electri…
This study examines the reaction of formamide with methylenedicyclohexanone and its isomer, tricyclohexanolone, under Leuckart reaction conditions. Both substrates gave the same products, sym-octahydroacridine and perhydroacridine, indicating that tricyclohexanolone isomerizes to methylenedicyclohex…
This paper studies stability of solutions for several partial differential boundary value problems in a complex Banach space that are not covered by earlier Volterra operator reduction methods. It considers first order, parabolic, and damped hyperbolic type equations on a half-plane with a continuou…
This study examines how the intensity of sulfur-35 beta radiation affects sulfur isotopic exchange between solid potassium sulfate and gaseous sulfur trioxide at 840 °C. Potassium sulfate samples of controlled particle size but differing specific radioactivity were exposed to measured amounts of sul…
This study examines the distribution of copper impurity within the cellular substructure of a zinc single crystal grown from the melt. A zinc single crystal containing copper was prepared by the Czochralski method, chemically polished to reveal its fibrous cellular structure, and analyzed in microvo…
The paper proposes a unified iterative method for solving Fredholm integral equations of the first and second kind by treating them as a single parameter-dependent equation involving a kernel, an unknown function, and a spectral parameter. For real or complex symmetric kernels, it gives substitution…
The paper studies an oblique derivative boundary-value problem for a first-order elliptic system in a multiply connected plane domain, formulated for a complex function satisfying a generalized Beltrami-type equation. It reduces the problem to an equivalent Riemann-Hilbert problem for a system of th…
This paper investigates the preparation of primary alcohols from alpha olefins through organoaluminum intermediates, using 2-methylpentene-1 and 2-ethylhexene-1 as principal examples. The olefins were converted to higher aluminum trialkyls by reaction with activated aluminum and hydrogen, then oxidi…
This paper examines how annealing can alter, and under some conditions increase, the microinhomogeneity of aluminum and magnesium based alloys. Using autoradiography with radioactive tracers and quantitative microinhomogeneity coefficients derived from photometric analysis, the authors study Al, Fe,…
This paper examines semiconductor catalysis under conditions of intrinsic conductivity, contrasting it with earlier treatments focused on impurity semiconductors. The authors argue that in this regime catalytic activity should depend less on impurities and sample history, and more on intrinsic elect…
This paper proposes a thermodynamic framework for relations between stresses and strains in inelastic continuous media, extending phenomenological elasticity by introducing additional internal state parameters associated with hidden internal stresses and irreversible deformation. Starting from the e…
The study investigates the reduction of nickel ferrite by graphite in vacuum, with attention to the crystal-chemical transformations that distinguish ferrites from simpler metal oxides. Nickel ferrite prepared by sintering was reduced at high temperature with excess graphite, while mass loss, carbon…
The paper addresses the need for standard cyclopentane hydrocarbons for studying ligroin and kerosene fractions, focusing on 1,2-dialkylcyclopentanes of compositions C10H20 to C13H26. The authors synthesized 1-ethyl-2-n-propylcyclopentane, 1-ethyl-2-n-butylcyclopentane, and 1,2-di-n-butylcyclopentan…
