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
This paper summarizes geological controls on gold mineralization in the western Irokinda-Kindikan ore field, located in the South Muya block near the Kilyan tectonic zone. It describes the structure, host rocks, morphology, sulfide assemblages, and alteration patterns of gold-bearing quartz veins, a…
This paper examines the origin of uneven bedding surfaces and coal seam geometry in the Tataurovskoye and Chernovskoye brown coal deposits of the Chita-Ingoda depression. Using field observations from the Chernovskoye open pit and granulometric analysis of sands from the Tataurovskoye deposit based …
This paper examines the origin of siliceous shales in ancient strata of the southwestern spurs of the Kuznetsk Alatau, focusing on their relationship to Cambrian and Proterozoic spilite diabase volcanogenic formations. On the basis of field relationships, lithologic observations, stratigraphic posit…
This paper evaluates the engineering-geological conditions of the Uryup area in the northwestern Berezovsky brown coal deposit, with attention to factors relevant to planned open-pit mining. Based on detailed exploration data, combined engineering-geological and exploration boreholes, hydrogeologica…
This paper examines lithological and structural controls on gold mineralization in the Berikul ore field of the Kuznetsk Alatau, using geological and mining data accumulated from exploration of deeper levels and deposit flanks. It argues that regional localization of ore fields is mainly related to …
This paper compares the geochemical characteristics of the Mainsky and Olkhovsky gabbro-plagiogranite complexes of the Western and Eastern Sayan, focusing chiefly on the Malokandatsky and Chetsky massifs. Using semiquantitative spectral analyses of accessory elements in basic, intermediate, and acid…
This study examines variations in the hydrogen isotopic composition of groundwater with depth at the Kaskad gold ore deposit in the Kuznetsk Alatau. Water samples from mine adits down to 650 m were analyzed for deuterium by the flotation method and compared with chemical composition and hydrogeologi…
This paper examines criteria for reconstructing ancient mire types in Jurassic limnic coal-bearing basins, using the Irsha-Borodino and Nazarovo deposits of southern Krasnoyarsk Krai as examples. The authors combine lithologic-facies mapping, bedding morphology, granulometric analysis of sandy and s…
This paper examines Precambrian basement formations penetrated by deep boreholes near Ermakovo and Shchuchya in the northeastern West Siberian Plate, where prior work had not provided detailed stratigraphic characterization. Using core descriptions, electrical logging data, and comparison with Preca…
This paper examines the occurrence and significance of graphite in ores of the Olkhovskoye gold deposit in the Eastern Sayan, where earlier descriptions had paid little attention to it despite its association with fractures and ore zones. Using geological and microscopic observations, the author des…
This paper examines unsteady natural convection during the cooling of a horizontal, effectively infinite cylinder in air, focusing on assumptions used to simplify the governing boundary-layer equations. Using a quadratic approximation for the temperature profile, the authors derive expressions for t…
This paper describes an apparatus for investigating short-term instability in betatron radiation by simultaneously recording pulse parameters from cycle to cycle. The system converts pulse amplitudes, durations, and short time intervals into expanded or proportional signals suitable for a loop oscil…
The paper studies the differential geometry of the six-parameter family K(2,6) of nondegenerate conics in three-dimensional projective space whose planes form a two-parameter family. Using Cartan’s moving frame method, it derives the frame equations, identifies intrinsic and prolonged fundamental ob…
The article studies six-parameter families of nondegenerate conics in three-dimensional projective space whose planes form a three-parameter family. Using the moving frame method and exterior differential forms, it constructs principal and prolonged fundamental objects, performs frame normalizations…
The paper studies a seven-parameter family of nondegenerate conics in three-dimensional projective space whose planes form a three-parameter family, using the projective moving-frame method and exterior differential forms. After a partial normalization of the frame, it derives systems of differentia…
This paper studies the dynamics of an electrohydraulic servo drive with a G68-1 spool valve, emphasizing nonlinear effects that are difficult to capture with linear analysis. A system of differential equations is formulated to account for fluid compressibility, hydrodynamic forces on the spool, nonl…
This paper examines how thermal nonstationarity affects the convective heat transfer coefficient during natural convection cooling, focusing on the practical case of a heated thin-walled cylinder placed in a medium of constant temperature. Using a simplified boundary-layer formulation with a region …
This paper develops analytical relations for selecting operating parameters in electrodialysis with ion exchange membranes. Starting from Faraday’s law and membrane current efficiencies, it distinguishes actual from apparent substance transfer and derives expressions linking apparent electrodialyzer…
The paper addresses the synthesis of relay circuits whose behavior depends on signal duration, delay, and pulse formation, problems that ordinary Boolean algebra does not conveniently describe. It introduces static and pulse logical variables, including variables associated with leading and trailing…
This paper develops a computational formulation for calculating the spatial distribution of energy lost by electrons in an infinite homogeneous medium, starting from an existing method for electron angular and energy distribution functions. By multiplying the transport recurrence relation by the spe…
This paper analyzes the reduced stopping power of MeV protons channeled in ionic crystals, focusing on the relative roles of inner shell excitation, binary collisions with valence electrons, and collective valence electron plasma oscillations. Using impact parameter estimates for protons channeled a…
This study examines surface defects in evaporated silicon monoxide films, a problem relevant to producing defect-free coatings for microelectronic applications. Films were deposited from a tantalum cylinder onto glass and rock-salt substrates, both with and without an internal ring-disk-ring separat…
This paper examines how to improve the sensitivity and reliability of scintillation-based betatron flaw detection, where defect signals are limited by fluctuation noise in detector and recording circuits. Using probability theory, statistical reception theory, correlation analysis, and sampling argu…
This paper investigates how temperature and impulse-front steepness affect breakdown voltages in transformer oil, technical-purity water, and polytetrafluoroethylene, materials relevant to compact high-voltage insulation systems. Using rod-plane electrodes in a thermal chamber, the authors measured …
This paper examines commutation processes in an electrostatic generator with cascaded transporter connections, addressing whether generator current can be treated by quasistatic methods rather than full electrodynamic analysis. Using oscillographic measurements on a single-disk short-circuit model w…
This paper examines discharge delay and breakdown behavior in several polymers exposed to nanosecond high-voltage pulses in a nonuniform point to plane field. Using approximately rectangular pulses with a 3 ns front and about 30 ns duration, the authors measured average breakdown gradients for polys…
This paper examines how to choose the magnetizing current, expressed through the amplitude of the magnetizing field, for alternating-current coercimeters used in electromagnetic quality control of ferromagnetic products. Using the relation between the measured phase or time interval and the dynamic …
This paper analyzes how the magnetic characteristics of a closing magnetic core affect alternating-current quality control measurements based on coercive force and residual induction. Using an idealized series magnetic circuit of two half-rings, one representing the core and one the inspected produc…
This paper examines the design requirements for a computing device to regulate the injection phase of a betatron in order to improve bremsstrahlung intensity stability. Starting from the injection condition, it analyzes how errors in injection voltage, magnetic field, and supply frequency affect the…
The paper addresses stabilization of betatron radiation by accurately determining and setting the electron injection phase. It discusses design variants for a specialized digital computing device based on the injection condition, replacing direct arithmetic division with stored function values in re…
This paper examines the nonlinearity of the static input, output characteristic of a magnetic pulse-width modulator used for converting direct-current signals. It compares three correction approaches: increasing the magnetic bias field, applying negative feedback, and linking the bias current to the…
This paper examines the frequency error of symmetric calibrated attenuators used as reference voltage dividers, with attention to parasitic inductances and capacitances that become significant at higher frequencies. It develops an equivalent shielded four-terminal network model, derives the transmis…
This paper examines whether phase relationships can be used to estimate the frequency error of symmetric resistive attenuation boxes affected by parasitic reactive conductances. After deriving the relation between amplitude error and phase shift for ideal minimum-phase four-terminal networks, the au…
This paper reports an experimental observation of a second harmonic in the high-frequency component of magnetization in a ferromagnetic specimen subjected to a complex pulsating field, where the high-frequency field is much smaller than the low-frequency alternating field. Using coupled coils, a fil…
This paper proposes and tests an experimental method for detecting variation of coercive force across the cross section of a ferromagnetic specimen. The method uses the frequency dependent penetration depth of an alternating component in a pulsating magnetic field and identifies mean coercive force …
This paper describes the design of a magnetic system for an experimental autoresonance electron accelerator requiring a nearly uniform constant axial field of about 1000 oersteds over a cylindrical interaction volume 200 mm long and 190 mm in diameter. The author argues that conventional iron-core s…
The paper develops a semi-theoretical mathematical model for particle capture into acceleration during multi-turn injection in a weak-focusing synchrotron, motivated by the need to optimize capture conditions when magnetic-field and beam parameters vary between cycles. Starting from betatron-oscilla…
This paper formulates the choice of operating intervals for long used complex systems subject to periodic preventive maintenance as a mathematical programming problem. It defines an objective function based on the mean useful output over a fixed operating period and, using known reliability characte…
This paper develops an analog computer model for the stochastic dependence of bremsstrahlung gamma-radiation intensity in a high-current 25 MeV betatron with external high-voltage injection on its principal adjustable parameters. Using passive experimental data and Brandon’s multiple regression meth…
The paper discusses the production of quasi-monoenergetic and polarized gamma-ray beams through coherent bremsstrahlung of high-energy electrons in single-crystal targets for experiments at a 1.5 GeV synchrotron. It outlines the classical and quantum-mechanical basis for spectral peaks arising from …
This paper examines how gamma irradiation affects the temperature coefficient of linear expansion in KCl, KBr, and KCl-KBr solid solution crystals. Using a capacitive dilatometer, the authors measured changes in expansion at 100 degrees Celsius after Co-60 irradiation over doses from 3 x 10^6 to 4 x…
This article examines the use of the added mass effect of a body undergoing unsteady motion in a liquid as the basis for an automatic densimeter for process solutions. It derives the relation between liquid density, added mass, and the natural frequency of a vertically oscillating immersed body, the…
The paper addresses the identification of the molecule responsible for previously undeciphered orange and green band systems in the visible spectrum of an arc between calcium electrodes. Using vibrational analysis of the orange system, comparison of derived vibrational constants with known data for …
This paper discusses procedures for deciphering the vibrational band structure of electronic transitions in diatomic molecular spectra, especially when reference data are incomplete or band systems overlap. It formulates the use of Deslandres tables and band-head wave numbers through empirical vibra…
The paper examines the use of monochromatic electron beams for flaw detection and thickness measurement in thin, low atomic number materials, where conventional radiographic methods are limited by intensity measurement accuracy. It proposes a spectrometric electron flaw detector that infers thicknes…
This study examines why reported dielectric losses in KCl-KBr solid solutions differ, focusing on the effects of electrode type, electrode application, and atmospheric moisture on the loss tangent and electrical conductivity. Measurements comparing aquadag, optical-contact, and sputtered platinum el…
The paper analyzes the spin dynamics of a relativistic electron moving in constant homogeneous crossed electric and magnetic fields, with particular attention to the effect of the electron’s anomalous magnetic moment. Using solutions of the Dirac equation and its Pauli-modified Hamiltonian, the auth…
A microspectrophotometric apparatus is described for measuring absorption spectra and optical density changes in filamentary crystals and other microspecimens during prolonged X-ray irradiation. The design uses a two-slit microcell in the microscope optical path, allowing comparison measurements bet…
This paper examines radical-recombination luminescence in zinc oxide and zinc sulfide phosphors excited by hydrogen and oxygen atoms at low pressure. Comparing these spectra with photoluminescence, the authors show that surface excitation can produce additional bands, especially near 470 to 490 nm, …
This paper describes an apparatus for investigating radical-recombination luminescence of solids, motivated by the difficulty of studying related luminescence in flames and by interest in surface recombination processes involving free atoms and radicals. The system excites luminescence in powders, f…
