On the nature of doping effect of methane in ZnO thin films deposited by RF-magnetron sputtering

Journal of Materials Science: Materials in Electronics - A comparative study of the effects of methane and hydrogen as reactive agents on the structural, optical, and electrical properties of ZnO...     

Periglase-spinel refractories based on magnesite powder from caustic dust

Conclusions Periclase-spinel products in whose batch ordinary magnesite powder of fractions 3-1 mm is replaced with powder of the same fraction but obtained by burning caustic magnesite without sintering additives are satisfactory as regards all factors except thermal-shock resistance, and meet the requirements of GOST 10888-64.The resistance and wear of the experimental periclase-spinel products in the roof of an open-hearth furnace are about the same as for ordinary roof magnesite-chromite refractories.Translated from Ogneupory, No.5, pp. 12–13, May, 1970.     

Seismic methods for study of soil building properties

Bulletin of Engineering Geology and the Environment - Information about distribution of elastic wave propagation velocities Vp, Vs in the subsurface zone of a soil mass can be obtained rapidly and...     

Thermoelectric properties of TlIn<Subscript>1 − <Emphasis Type="Italic">x</Emphasis></Subscript>Eu<Subscript><Emphasis Type="Italic">x</Emphasis></Subscript>Te<Subscript>2</Subscript> crystals

The thermoelectric properties of TlIn_{1 ? x} Eu _x Te₂ (0 < x ≤ 0.09) solid solutions have been studied at temperatures from 300 to 500 K. The results indicate that the thermoelectric figure of merit of the alloys increases with temperature and europium content.     

Technological features of a process and equipment for superplastic rolling of axially symmetric heat-resistant alloy components of rotors for modern aircraft engines

Scientific bases of a technology for superplastic roll forming of axially symmetric parts of gas turbine engines that are made of heat-resistant alloys are described. It is shown that a formed microcrystal structure allows their deformation under conditions of superplasticity, thereby providing changes in physical and mechanical and processing properties. Parts manufactured by superplastic rolling feature a highly homogeneous microstructure over the entire volume and isotropic mechanical properties or an optimized gradient microstructure allowing for nonuniform temperature and power loading in the process of operation. Technological features of the equipment for superplastic roll forming of discs for motors and requirements for the equipment and the control system are described and methods of calculation of major unit strength are covered.     

Asymptotic analysis of a multistage queuing system with a high-rate renewal arrival process

This paper presents a study of an infinite-server multistage queuing system with a high-rate renewal arrival process and arbitrary service time. It is shown that under the condition of infinitely increasing rate of arrival, the multidimensional distribution of the probabilities of the number of servers employed to service stages of the system can be approximated by a multidimensional normal distribution. The expectation vector and the covariance matrix of this distribution were obtained.     

Techniques for estimating the power of the intermodulation interferences of orthogonal frequency-division multiplexing signals

The techniques for estimating the powers of intermodulation interferences (the total power of interferences and the interference power within the signal band), which correspond to orthogonal frequency-division multiplexing (OFDM) signals at the output of a transmitter interpreted as an inertialess nonlinear device, are described.     

Propagation of unipolar perturbations in hysteretic media with saturation of nonlinear losses

The propagation and evolution of unipolar perturbation pulses in hysteretic media with saturation of nonlinear losses have been theoretically studied. An exact analytical solution that describes the propagation and evolution of initially triangular pulses in these media has been obtained. Numerical and graphic analyses of the obtained solution are presented.     

A study of the initial stages of iron passivation in neutral solutions using the quartz crystal resonator technique

The initial period of growth of a passive film of iron in borate solutions (pH 7.4 and 6.7) is studied using the quartz crystal resonator technique (EQSN) and pulsed chronoamperometry. Dependences of the surface layer thickness on time are obtained at the metal passivation and prepassivation potentials. Regions corresponding to different stages of passive layer formation are found in anodic current transients, which allowed the ambiguous effect of atomic hydrogen on kinetics of hydrogenated iron dissolution to be explained. It is shown that the iron hydrogenation promoter prevents formation of a primary passive film by accelerating iron dissolution at prepassivation potentials.