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Article
Increase in Process Mode Stability by Determining Hot Areas of Steel Ladle
This article considers suggestions about strengthening the resistance of refractory facing of steel-teeming ladles by applying magnesia fluxes and optimizing the temperature mode control of steel ladle casing ...
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Article
Quasi-3D Model of a Proton Exchange Membrane Fuel Cell with Different Types of Gas Flow Field
A quasi-3D model for performance calculation of the oxygen/hydrogen proton exchange membrane fuel cell (PEMFC) was developed. The model takes into account oxygen and proton transport in porous cathode, oxygen ...
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Article
On the Nature of the Rapid Color Changes of the UX Ori Star RY Lupi at Deep Minima
We propose an explanation for the rapid color changes on the color–magnitude diagrams observed by Gahm et al. in the T Tauri star RY Lup during its deep minima. Our calculations have shown that the hot accreti...
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Article
Decrease in Consumption of Ferrous Alloys for Alloying of Pipe Steel With Controlled Nitrogen Content at Taganrog Iron & Steel Factory (AO TAGMET)
This article discusses the measures devoted to decrease in specific consumption of ferrous alloys during production of pipe steels using digital technologies. The algorithm and the mathematical model of steel ...
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Article
On the Scattered Radiation Spectrum of Protoplanetary Disks
The deformation of the photospheric radiation of a young star during scattering in the inner regions of the protoplanetary disk has been studied. The distortion of spectral lines occurs as a result of a variat...
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Article
Models of Magnetospheric Accretion onto Young Stars in the Absence of Ionization Equilibrium
The formation of hydrogen emission lines in the magnetospheres of young stars is considered. The magnetosphere is assumed to be formed by a dipole magnetic field whose axis is aligned with the stellar rotation...
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Article
Substitution of Phosphorus at the InP(001) Surface Upon Annealing in an Arsenic Flux
Changes in the structure and elemental composition of the surface of the epitaxy-ready InP(001) substrate in an As flux in ultrahigh vacuum are studied in situ by the reflection high-energy electron diffractio...
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Article
High-Power Microwave Photodiodes Based on MBE-Grown InAlAs/InGaAs Heterostructures
The design and fabrication technology of high-power Schottky-barrier microwave mesa photodiodes from 10 to 40 μm in diameter back-illuminated through the substrate are described. The diodes were made on MBE-gr...
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Article
Mechanisms of the Oxides Removal from the InP Surface under Annealing in an Arsenic Flux
The surface transformation mechanisms upon annealing of epi-ready InP(001) substrates in the molecules arsenic flux were studied in situ by reflection high-speed electron diffraction (RHEED). The effect of the...
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Article
Vertical-Cavity Surface-Emitting Lasers for Miniature Quantum Frequency Standards
The results of the development of vertical-cavity surface emitting lasers based on Al \({}_{x}\) Ga ...
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Article
Color Indices of T Tauri Stars in Variable Circumstellar Extinction Models
Variable circumstellar extinction models as applied to T Tauri stars are considered. In contrast to hotter UX Ori stars, for which simplified eclipse models are applicable, the star is deemed a point source of...
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Article
Spin Chain Ferrimagnetism with Competing Exchange Interactions
A quantum spin model of a delta chain with exchange interactions of ferro- (F) and antiferromagnetic (AF) types is studied. The model properties significantly depend on the frustration parameter α (the ratio o...
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Article
Modeling of Hydrogen Emission Lines in the Spectrum of UX Ori in Its Bright State and during Eclipses
The hydrogen spectrum of the UX Ori-type star is modeled in a bright state and during an eclipse by an opaque dusty fragment of its own protoplanetary disk. The disk wind is considered as the main source of th...
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Article
Subminiature Light Sources Based on Semiconductor Nanostructures
The paper states the operating principles of subminiature semiconductor emitters and offers the research results of the performance for those emitters that were developed and manufactured at the Rzhanov Instit...
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Article
Quasi-Resonant States of Hydrogen Gas
The article considers the poorly studied states of hydrogen gas (called here “quasi-resonant”) with anomalously high intensity ratios of the lines in the Balmer series, $$I({{{\text{H}}}_{\alpha }}){\text{/}}I({...
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Article
The Mechanism of Grain Boundary Serration and Fan-Type Structure Formation in Ni-Based Superalloys
A model of discontinuous precipitation of γ′ phase at grain boundaries (GBs) in polycrystalline Ni-based superalloys during continuous cooling from supersolvus temperature was developed. The model calculates the ...
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Article
Study of the Density of Interface States at the Insulator/In0.52Al0.48As Interface
The C–V characteristics of Au/Al2O3/In0.52Al0.48As and Au/SiO2/In0.52Al0.48As metal–insulator–semiconductor structures have been studied. It has been established that the fragmentary measurement of the C–V charac...
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Article
Magnetic Properties of a Spin Delta-Chain
A quantum spin model of a delta-chain with ferro- and antiferromagnetic exchange interactions has been analyzed. Special attention has been paid to the analysis of magnetic properties at the critical point tha...
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Article
Nonclassical Light Sources Based on Selectively Positioned Deterministic Microlens Structures and (111) In(Ga)As Quantum Dots
The results of investigations of the optical characteristics of nonclassical light sources based on selectively positioned microlens structures and single (111) In(Ga)As quantum dots grown on a (111) BGaAs sub...
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Article
High-Power High-Speed Schottky Photodiodes for Analog Fiber-Optic Microwave Signal Transmission Lines
Design and manufacturing technology of high-power microwave Schottky photodiodes with microstripe leads have been developed based on an InAlAs/InGaAs heterostructure. The operating frequency of photodiodes wit...
