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 describes a computational and statistical methodology for processing experiments on neutral meson photoproduction in complex nuclei, where two decay gamma quanta are detected by Cherenkov total absorption spectrometers. It formulates the relation between measured yields and differential c…
This paper estimates low energy eta nucleon interaction cross sections in the region of the S11 N*(1535) resonance, where direct eta beam measurements are not feasible. The authors model elastic eta N scattering and eta N to pi N conversion through s and u channel N*(1535) pole amplitudes, derive di…
This study examines the energy, timing, and detection characteristics of Cherenkov total-absorption gamma spectrometers for gamma quanta in the 200 to 700 MeV range. Three instrument variants are compared: a design separating spectrometric and timing functions with FEU-49 and FEU-36 photomultipliers…
The paper describes an experimental apparatus for investigating recoil proton polarization in meson photoproduction, combining a proton telescope, a Cherenkov gamma spectrometer, spark chambers, timing electronics, and an optical recording system. It details the construction and calibration of scint…
This paper analyzes bound S-wave motion in a Woods-Saxon potential and applies the results to estimating Lambda hyperon binding in hypernuclei. It derives several representations of the radial wave functions using hypergeometric functions, formulates exact and approximate eigenvalue equations, and n…
This study examines the disintegration of light and heavy nuclei in nuclear photoemulsions irradiated by bremsstrahlung gamma rays with maximum energies from 300 MeV to 2 GeV. By comparing normal BR-2 emulsions with gelatin-diluted BR-2 emulsions, the authors statistically separate star-formation cr…
The paper examines the speculative possibility that hyperon matter may lack nuclear saturation and therefore contract into compact strongly interacting objects termed collapsons. It argues that such objects, if formed during neutronization at stellar densities, could absorb nucleons or neutrons thro…
The paper summarizes the operating characteristics and experimental beam capabilities of the Sirius weak-focusing electron synchrotron at the Tomsk Polytechnic Institute after several years of use. It describes the accelerator layout, injection from a 6 MeV microtron, pulsed guide field, electron in…
This paper reviews the development and prospects of elementary particle research at the Research Institute of Nuclear Physics following the 1965 commissioning of the Sirius electron synchrotron in Tomsk. It summarizes experimental work on synchrotron radiation, nuclear emulsions, meson production, p…
This paper investigates how plasticizers and modifiers affect the electrophysical properties, glass transition, and supramolecular structure of hot-cured epoxy compounds based on ED-6 resin cured with methyltetrahydrophthalic anhydride. Specimens containing dibutyl phthalate, polyepoxy acrylate MGF-…
This study examines structural and chemical changes in unfilled rubber vulcanizate films subjected to ionization aging under an industrial-frequency electric field. Infrared spectra were recorded periodically for vulcanizates based on NR with SKD and on SKEPT, using different vulcanizing systems and…
This study examines how different vulcanizing systems affect insulating rubbers based on low-unsaturation butyl rubber, with attention to dielectric behavior, mechanical properties, heat aging, electric strength, and ionization resistance. Three formulations producing primarily sulfide, carbon-nitro…
This paper develops a theoretical equation for the life curve of electrical insulation, relating time to breakdown to electric field strength, temperature, mechanical stress, and material parameters. Starting from fluctuation theory for mechanical rupture, the authors introduce an equivalent mechani…
The paper addresses estimation of probabilistic characteristics of output coordinates in aircraft stabilization systems subjected to random vertical wind gusts from atmospheric turbulence. Using standard assumptions of locally stationary homogeneous turbulence and a spectral density model for gust v…
This paper examines the accuracy of an aircraft flight altitude stabilization system using a radio altimeter, with attention to random altimeter-signal disturbances, atmospheric turbulence, and possible saturation in an autopilot actuator element. The analysis derives transfer functions and variance…
This paper addresses the problem of describing and optimizing betatron gamma radiation intensity under random fluctuations of input parameters and uncontrolled disturbances. It argues that passive experimental data are insufficient for reliable control-oriented modeling over a broad factor range, an…
This paper examines the management of the educational process in higher education through the lens of control theory, treating students and student groups as complex control objects influenced by teachers, institutional conditions, and disturbances such as illness or inadequate resources. The author…
This paper proposes an infrared method and device scheme for determining gas concentration that avoids the use of both positive and negative sensitization in negative filtering methods. The radiation passing through the sample is divided into two channels, one with a vacuum or nonabsorbing cell and …
This paper analyzes methodological error in an infrared gas analyzer that determines gas concentration by logarithmic processing of signals from working and reference optical paths. It derives static characteristics and limiting relative error formulas for two output unit implementations, a logarith…
The paper discusses the use of experimental statistical optimization methods in the design of electromagnetic automation devices, where purely analytical mathematical programming is limited by approximate dependencies and experimentally determined coefficients. It proposes a two stage procedure in w…
This paper proposes a method for measuring the spatial and frequency distribution of stimulated Raman scattering radiation power, motivated by the use of this distribution to analyze substance composition and by the limitations of photographic registration methods. The method uses two stimulated Ram…
A photoelectric moiré device is proposed for measuring angular motion parameters while avoiding the annular light sources, annular photodetectors, and radial raster slits used in earlier angle to phase converters. The design uses ordinary illuminators and photodetectors with raster disks having circ…
This paper examines electromechanical transients during the start-up of two-phase asynchronous micromotors operating in an oscillatory mode, where supply conditions create a rocking magnetic field and torsional shaft oscillations. Because direct analytical solution of the motion equation is describe…
This study examines whether small additions of samarium can improve the cast structure and heat treatment response of R18 high-speed steel, whose use in cast cutting tools is limited by reduced toughness. Experimental melts containing 0.005 to 0.3 percent samarium were produced in an induction furna…
This paper compares several strength criteria for brittle materials under mixed plane stress, focusing on the effect of unequal tensile and compressive strength limits. Experimental data for 19 materials are approximated by a quadratic strength contour, with parameters fitted by least squares, and t…
This paper examines how intensive tool wear during machining of difficult-to-machine materials alters cutting resistance and the motion of machine-tool feed units. Treating the feed chain as an elastic system with dry friction, it analyzes the case in which the cutting-resistance component increases…
This paper addresses the problem of inadequate cooling in high-speed grinding, where increased heat generation can contribute to burns, cracks, and residual stresses in the workpiece. It argues that conventional free-flood cutting fluid supply is ineffective because of low pump capacity and insuffic…
This paper examines the relationship between winding, working, and idle revolutions in wristwatch spring motors using spiral mainsprings made from the cobalt alloy K40TYu, which had become widely used for its anticorrosion and antimagnetic properties. After 1000 preliminary winding and unwinding cyc…
This paper experimentally checks geometric formulas used to estimate operating parameters of clock spring motors, using factory spiral springs from Baltika, Polet, and Slava clocks. The authors compare theoretical values for winding turns and the numbers of spring coils in wound and released states …
This paper addresses the design calculation of the number of free coils in spiral mainsprings for wristwatches, a parameter affecting the spring motor’s mechanical characteristics, dimensions, and weight. Because earlier theoretical formulas were cumbersome and existing empirical relations covered o…
This paper describes the design and operating principles of a high-speed closed-power-flow test bench for investigating gear transmissions under laboratory conditions. It explains the rationale for replacing open-flow benches, whose braking systems limit transmitted power, and presents the bench’s m…
This paper examines the applicability of similarity-law recalculation for predicting the mechanical characteristics of low-power safety fluid couplings operated at pump-wheel speeds different from those used in testing, particularly when Reynolds numbers are near or below the critical value. Using a…
This paper investigates an open-loop hydraulic servodrive using a continuous-control jet amplifier based on the interaction of submerged turbulent jets, proposed as an alternative to spool-type amplifiers. A physical model with a two-stage amplifier, nozzle-flapper control elements, and a rotary hyd…
This paper reports laboratory and field investigations of the dynamic behavior and durability of EKOR controlled check valves used in hydraulic powered roof supports for coal mining. Using a specialized test stand with pressure, displacement, and rotational speed sensors, the authors examined transi…
This paper presents a nomographic method for selecting design parameters of pneumatic impact units and estimating compressive stress amplitudes in drill rods during longitudinal impact. Using established relations for impact energy, striker mass and velocity, barrel cavity dimensions, and stress wav…
This paper examines the use of a linear approximation for the bearing surface curve in stiffness calculations for rough surface contact, instead of the more common power law relation between relative contact area and relative approach. The authors derive expressions for load, relative approach, and …
This paper examines the stability of strength characteristics in AS-418 glass-ceramic, a brittle material whose mechanical properties are difficult to evaluate by direct tensile testing. Cylindrical specimens were tested in radial and axial compression, and the results were processed statistically u…
This paper evaluates the error introduced when plastic flow curves are represented analytically rather than directly from tensile test data. Using tests on several metals and alloys, supplemented by published hardening diagrams for 166 materials, the authors compare power-law and linear stress, stra…
This paper examines how metal plasticity is affected by specimen cross section geometry, loading history, and stress or strain gradients. Experiments on steel specimens of equal area but different cross sections found that rectangular aspect ratio had little effect on plasticity or stability, while …
The paper examines when classical strength theories can be used without significant error despite their strong idealization of material behavior, including equal tensile and compressive resistance and linear response up to limiting stress. It compares the four classical criteria for biaxial and tria…
This paper presents a computer-based method for quantitatively comparing strength criteria for brittle materials over regions of plane stress, addressing the difficulty of selecting among competing theories with limited experimental confirmation. Using limiting principal-stress data from thin-walled…
This paper examines practical methods for measuring plastic surface deformations with ordinary resistance strain gauges, whose conventional use is limited by gauge strength and bonding constraints. It discusses a bent-gauge bonding technique, including an improved version using elastic metal foil, a…
This study examines dimensional accuracy and surface quality in smoothing broaching of holes in parts with nonuniform stiffness. Steel bushings modeled on a percussion hammer sleeve were broached under varying interference conditions, with flats machined either before or after broaching, and were ev…
This paper develops a strength calculation for rotating composite grinding wheels, modeled as thick walled rings subjected to inertial stresses. Starting from standard elastic solutions for radial and tangential stresses in rotating disks, it first reviews the case of a homogeneous ceramic bonded wh…
This paper analyzes radial and tangential stresses in composite grinding wheels reinforced by a steel ring, using previously derived calculation formulas and numerical examples for a 300 mm wheel operating at 100 m/s. It compares ordinary and composite wheels with varying reinforcing-ring dimensions…
This paper describes the development of a special test rig for strength and burst testing of high-speed grinding wheels intended for operation at peripheral speeds of 60 to 100 m/s. The apparatus uses a direct-current motor, belt transmission, high-speed spindle, reinforced protective chamber, and c…
This paper examines the feasibility of cylindrical grinding at 70 m/s using composite vitrified-bond wheels made from standard wheels intended for 35 m/s operation. The authors tested an abrasive ring bonded to a metal ring after balancing, dressing, and strength testing, measuring wheel wear, metal…
This paper examines the force components acting on carbide single-lip deep-hole drills with external coolant supply and internal chip removal. The authors describe a method for separating cutting forces from total measured torque and axial force by combining deep-drilling dynamometer measurements wi…
This paper examines the selection of cutting conditions for rough and semi-finish turning of difficult-to-machine titanium alloys VT3-1, VT9, and VT6 using VK8 carbide tools. Applying A. D. Makarov’s accelerated method, the study evaluates machinability through the intensity of flank wear and mean c…
