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
The paper examines frequent failures of handheld electric drill cables at the cable entry, especially in methane and coal dust environments where conductor breakage and short circuits may create ignition hazards. Based on observations of GRShS drill cables, the authors attribute rapid damage to unsu…
This paper develops radical theory for weakly associative nonassociative rings, a class defined by a containment condition on ideals generated inside nested subrings and including associative rings. It proves extension and restriction results for ideals and establishes that supernilpotent and subide…
The paper derives an analytical approximation for steady-state heat conduction in an infinitely long body with rectangular cross section, uniform internal heat generation, symmetry about the centerlines, and radiative boundary conditions governed by the Stefan-Boltzmann law. By assuming a constant r…
This paper examines protection of static series compensation capacitors in high-voltage transmission lines against overvoltages arising during short circuits. It proposes shunting the capacitors with a saturable reactor and analyzes the transient behavior of the resulting circuit using simplifying a…
This paper addresses selective protection against phase to ground faults in electrical networks with isolated neutral, where established selective schemes were lacking despite serious safety and fire hazards. It proposes a semiconductor protection circuit that responds to the direction and magnitude…
This paper presents a technical and economic procedure for choosing the number and rated capacity of transformers at industrial substations under reliability requirements for category I and II consumers. It outlines how permissible transformer overloads may be assessed using the one percent and thre…
The paper studies the representation of solutions of linear operator differential equations in a Hilbert space by means of continual integrals over paths in the spectrum of an auxiliary self-adjoint operator. It develops a framework of generalized and basic elements, uses generalized eigen-elements …
This paper describes a low-channel telemechanical system for combined manual and semiautomatic control of industrial crane mechanisms using electronic computing devices. It presents the architecture of a number-pulse control scheme, including an operator desk, encoder, two-wire communication channel…
This paper describes an automatic operator developed to modernize groove grinding machines used for bearing rings, replacing manual auxiliary actions with a coordinated automatic cycle. Using the LZ-5M machine as an example, it explains a mechanical and electromechanical sequence for feeding a blank…
This paper addresses the automation of groove grinding machines used for machining ball bearing ring grooves, with emphasis on improving productivity, surface finish, and dimensional consistency. It reviews possible modernization paths, including automatic handling, grinding wheel speed control, and…
This paper derives relations for estimating two-dimensional excess temperature fields in finite bodies from temperatures measured along symmetry axes or selected boundary lines. Starting from the heat-conduction equation, the authors assume a constant ratio between second derivatives in orthogonal d…
This paper examines the steady temperature field in an anisotropic body with uniform internal heat generation, motivated by electrical engineering applications such as transformer cores and windings. The authors formulate the two dimensional heat conduction problem with unequal thermal conductivitie…
This paper analyzes how rated power and machine geometry affect torque pulsation, torsional oscillations, and vibration harmonics in low-power single-phase induction motors. Starting from the standard expression for electromagnetic torque as a mean component plus a component at twice supply frequenc…
This paper analyzes the conditions under which a no-load cross-field electric-machine amplifier may undergo spontaneous self-excitation, causing loss of controllability. Starting from a system of differential equations for the control, compensating, and transverse circuits, it derives a characterist…
This paper reviews analytical approaches to commutation in direct current machines, focusing on how assumptions about brush contact resistance affect calculated current curves in the commutated section. It compares classical theory, constant transient voltage drop models, constant brush edge resista…
This note proves a formula for the second obstruction to extending a section of a skew product whose fiber is sufficiently aspherical and simple in the relevant dimensions. Using Boltyansky’s formula for comparing second obstructions and the Serre spectral sequence, it defines a cohomology class ass…
The study determines the crystal structure of metatorbernite, Cu[(UO2)(PO4)]2 · 8H2O, using X-ray diffraction data from selected plate crystals whose composition was confirmed chemically. Rotation and layer-line photographs established a tetragonal unit cell with a = 6.95 Å and c = 17.26 Å, two form…
This study examines complex formation of trace yttrium and cerium ions with a homologous series of aliphatic alpha-hydroxy acids, motivated by their use in chromatographic separation of rare earth elements. Using carrier-free radioisotopes, KU-2 cation exchange resin, and static distribution measure…
This paper studies the Schwarz alternating method for the stress formulation of linear elasticity on a domain formed by two partially overlapping subdomains. Using Sobolev’s variational approach, it constructs successive stress fields satisfying equilibrium and boundary tractions on alternating subd…
This paper develops a numerical method for boundary value problems for elliptic partial differential equations by deriving explicit summation formulas for finite difference operators on rectangular grids. It gives general solution representations for finite difference analogues of the Helmholtz or P…
The paper develops a Stieltjes integral for functions on a compact real interval with values in a K-space, using order uniform continuity rather than norm continuity. For an integrand taking values in a K-space and an integrator of bounded variation with values in the space of regular order-continuo…
This paper studies ordered Banach spaces through regular and completely regular cones, defined by norm convergence of monotone sequences under order or norm boundedness assumptions. It establishes implications among complete regularity, regularity, and normality, gives criteria for normality using o…
This study examines cyclopentenedione-1,3 as a dienophile for diene synthesis aimed at constructing polycyclic systems relevant to hydrindanone stereochemistry and steroid-related structures. The compound was prepared by oxidation of cyclopentenediols with chromic anhydride in acetic acid, then cond…
This paper reports tests of two turbine-driven downhole pumps, the N-1m and BN-15×4, developed for mine shaft sinking, bailer dewatering, and local dewatering in underground and earthwork operations. Experimental stand tests measured pump capacity, head, shaft speed, and compressed-air consumption u…
This paper analyzes emergency loads in mine hoisting installations that can damage or break hoisting ropes, distinguishing relatively safe impacts from dangerous cases involving a jammed descending or ascending conveyance. It derives energy-based conditions for rope rupture, using rope tensile test …
This paper addresses the construction and practical use of mine surveying plans projected onto an inclined plane, especially for deposits whose geometry is poorly represented on horizontal or vertical projections. It critiques earlier graphical and grapho analytical methods as cumbersome or incomple…
This paper addresses the problem of applying the second differences method for evaluating deposit exploration when sampling intervals are not uniform, a common condition caused by practical constraints such as terrain, structures, or borehole deviation. It proposes reducing first differences to a co…
This paper examines simplified adjustment methods for underground connecting traverses used in mine orientation through two vertical shafts. It derives how coordinate misclosures can be distributed either in proportion to side lengths or in proportion to coordinate increments, showing that the first…
This article compares technical and economic alternatives for preparing and mining coal mine fields divided into one-sided and two-sided extraction fields, with attention to typical Kuzbass mining and geological conditions. It evaluates variants of one-sided field extraction toward front and rear in…
The paper studies the planar Dirichlet problem for a second-order elliptic equation with real analytic coefficients in a simply connected domain. Using a complete system of particular solutions of the adjoint equation, derived from Vekua’s representation, it expresses the unknown normal derivative o…
This study examines whether copper compounds of niobic and tantalic acids prepared from oxides of different valence states form identical products or distinct valence isomers. The authors synthesized CuNbO3 and CuTaO3 by vacuum sintering Cu2O with pentoxides and CuO with dioxides, then characterized…
This paper examines how to select rational fan operating regimes for the pressure suction method of ventilating coal mines in the Southern Kuzbass, with particular attention to reducing effective pressure, air leakage, and endogenous fire hazards. Using an electrical model of a mine ventilation netw…
This paper examines drilling and blasting practices at the Stepanovka quarry near Tomsk, where rising demand for local building stone exposed the inefficiency and safety risks of short blasthole blasting on high, unstable benches. It analyzes quarry geology, current production indicators, explosive …
This paper examines methods for preventing seasonal freezing of soils during winter extraction at the Tugan deposit, where overburden and productive sands must remain workable for several months of frost. It reviews mechanical treatment, snow retention, insulating covers, shelters, and special metho…
This study examines seasonal ground freezing at the Tugan bedded sand deposit in Tomsk Oblast, where severe winter conditions affect the feasibility and methods of open-pit mining. Using Danilin frost tubes during the 1958 to 1959 winter, the authors measured freezing depths on experimental plots an…
This paper studies bounded non-self-adjoint operators in a separable Hilbert space, especially dissipative and completely continuous operators whose imaginary parts are trace class. Using infinite determinants associated with trace-class perturbations, it establishes contractivity properties of char…
This paper examines the conditions for comprehensive industrial development of the Tugan placer deposit in Tomsk Oblast, emphasizing its varied raw materials, including quartz sands, kaolin, clays, brown coal, and construction materials. The authors compare excavation and transport options for open-…
This paper evaluates the prospects for industrial development of the Bakchar iron ore deposit in Tomsk Oblast, situating it within Soviet plans to expand ferrous metallurgy in eastern regions. Using available geological data, comparisons with the Angara-Pit basin, and a preliminary open-pit design, …
This study examines the formation of tantalum iodides from elemental tantalum and iodine and the properties of tantalum deposited by thermal dissociation of these iodides. Using evacuated quartz ampoules, thermographic measurements with differential thermocouples, chemical analysis, and X-ray diffra…
This study examines model routes for constructing the BA ring system of tetracyclines, focusing on cyclohexane derivatives bearing functional groups suitable for later elaboration into tetracycline analogs. Using 1,2-dibromocyclohexane and related cyclohexenylacetic acid derivatives, the authors pre…
The paper addresses extremal control of stable inertial objects of order n, where reversing the actuator according to the measured dynamic output can cause oscillatory and inaccurate search for the static extremum. It proposes estimating, over a finite time interval after each step change of the inp…
This paper reports addition reactions of acetylenecarboxylic acids and their esters with arylsulfinic acids, cyclic thioamides, and cyclic secondary amines, motivated by the reactivity analogy between acetylenedicarboxylic acid derivatives and benzoquinone. Heating acetylenedicarboxylic acid or its …
This paper investigates whether cobalt-60 gamma irradiation changes the elastic constants of fused quartz fibers, a question previously unresolved because earlier measurements reported no gamma-ray effect within lower precision limits. The authors developed a torsional-oscillation apparatus for quar…
This paper completes the decomposition problem for tensor products of irreducible unitary representations of the proper Lorentz group by treating the case in which both factors belong to the complementary series. Using Hilbert space realizations by generalized functions and Fourier transforms, the a…
This study examines the electrical behavior of composites in which highly dispersed iron particles are separated by thin, poorly conducting polymer layers, with attention to whether electronic transport can occur through such structures. Compositions were prepared either by adding preformed polymers…
Cyclopentene-4-dione-1,3, the simplest analogue of indandione-1,3, was prepared by a modified procedure involving direct conversion of 3,5-dibromocyclopentene-1 with silver chromate, and its chemical behavior and spectra were examined. The compound was shown to form a dioxime, condense with p-nitrob…
This paper examines the calculation of oblique shock waves in ideal magnetic gas dynamics, focusing on how the tangential magnetic field, downstream velocity components, and density behind the shock front are obtained from related cubic equations. It distinguishes accelerated and retarded shock-wave…
This paper examines how the mechanical properties of steel tubes and tube sheets affect the strength of rolled joints in pressure vessel construction. Using plasticity theory for radial expansion of a tube treated as a plane ring, it relates tube wall thickness, yield strengths, contact pressure, an…
The paper develops a method for calculating the transient temperature field in the resistance rods of high current rod-type shunts during switch-on current. It replaces an earlier constant-current approximation with a heat-conduction model in which the current, and therefore volumetric heat generati…
This article addresses the choice between single-pass and two-pass water flow arrangements in surface condensers, a decision affecting auxiliary power consumption and nonferrous metal use in cooling surfaces. It derives boundary relations for the economical use of one-pass condensers by comparing eq…
