Materials Literature
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A mathematical model for determining residual stress fields and plastic deformations in a hardened layer of a sample cylinder after anisotropic strengthening is described. A procedure is set forth and the model is identified on the example of sample cylinders made of 40XH steel after running with a roller. Experimenta…
Effect of modification with an alkali metal on the acid properties of alumina supports and on the oligomerization capacity and working stability of Pd-Al 2 O 3 catalysts was studied.
It has been analytically shown that the kinetics of ultrafast migration-accelerated quenching of luminescence in nanoparticles for the case of the short-pulse-induced excitation of donors has a complex multistage character. This conclusion has been confirmed by Monte Carlo computer simulation. An order stage (exponent…
The transport properties of C59N encapsulated semiconducting single-walled carbon nanotubes (SWCNTs) (C59N-peapod) are investigated. Transport measurements of the peapods in field effect transistors (FETs) reveal that ∼14% of the C59N-peapod sample shows n-type behavior even though the electronic properties of the hos…
The present paper studied the as-cast structure and macrosegregation of the wedge-shaped castings produced vertical centrifugal casting process at different mould rotating speeds. The element distributions were determined by the secondary electron line scanning in the S-570SEM type scanning electron microscope (SEM) a…
The goal of our research is to demonstrate the feasibility of employing biogenic nanoporous silica as a key component in developing a biosensor platform for rapid label-free electrochemical detection of proteins from pure and commercial human serum samples with high sensitivity and selectivity. The biosensor platform…
The transport of protons and potassium ions across the membranes of the bacteria Enterococcus hirae growing in an alkaline medium (pH 8.0) or under experimental conditions (pH 7.5) during glucose fermentation accomplished by a KtrI-system of absorption of potassium ions, which can interact with F0F1-ATPase to form at…
In this paper, the rotor eddy current loss of surface-mounted permanent magnet (SPM) machine is predicted using a simplified analytical model, which accounts for curvature, time and space mmf harmonics, and is applicable to calculate the eddy current loss in both permanent magnets and sleeve, but neglects the influenc…
We use atomic force microscopy lithography to write charge patterns in close proximity to carbon nanotube field-effect transistor devices. The silicon dioxide substrate retains the charge for days, allowing various charge configurations to be tested. We show that the written charge can move the Fermi level in the nano…
The environmental pollution caused by green-house gases such as CO₂ and SF6 has been becoming the main issue of industrial society. Many developed countries are making efforts to minimize the amount of CO₂ emission come from the operation of high voltage electrical apparatuses. As a part of these efforts, 180 countrie…
The method of frustrated multiple internal reflection (FMIR) infrared spectroscopy was used to study the nature of intermediates that formed upon oxidation of sulfur dioxide in trifluoroacetic acid (TFA) of various concentrations at 30°C. It was established that sulfur dioxide bound to a complex with TFA is oxidized b…
Conventional radar absorbent materials (RAM) such as iron ball (carbonyl iron) and carbon black prove less effective against modern homing devices specially those which operate at low frequency microwaves. Hybrid nanoparticles based on ferrite are found to be more suitable for such applications. Iron (Fe) coated carbo…
We study the reflection from a transverse notch and the propagation of a longitudinal decaying traveling wave in a bar by using the simplest model of the stress-strain state in the notch region and obtain the solution dependence on the notch parameters. The solution of the inverse problem permits determining the notch…
Converter transformer plays an important role in the HVDC transmission system. The insulation in converter transformer withstands both the AC and DC voltage during operation, which is different from that in normal power transformer. In order to investigate the effect of DC electric field on streaming electrification i…
A catalyst on the basis of complex oxide with perovskite structure deposited on a cellular nickel has been studied by scanning and transmission electron microscopy. The presence of the porous structure of the catalytic coating and its nature and the particle size of the catalytic phase have been established. The morph…
The concentration dependences of the electron work function for lithium samples in the cobaltrich region of the state diagram of the Ce-Co binary mixture is studied by the contact potential difference method at 20°C. It is shown that the electron work function isotherm has the shape of a broken line with kinks corresp…
The corrosion behavior of X70 pipeline steel in 0.5% NaC1 solution in different temperature of 25°C、35°C and 55°C was studied by dynamic potential polarization curve and electrochemical impedance spectroscopy（EIS）method. The corrosion topography of X70 pipeline steel in normal temperature and 30°C was also compared in…
The correlation between methods of synthesis and magnetostrictive properties of ferrite materials is investigated. CoFe 2 O 4 spinel ferrite was synthesized using three techniques: solid-phase reactions, thermal hydrolysis, and sol-gel. The effect of the method of synthesis on the magnetostrictive properties of spinel…
We report the first-principle calculations of ferromagnetism in C -doped ZnO clusters. The carbon impurities in ZnO clusters are doped at substitutional O or Zn sites and at interstitial sites and the total energy calculations suggest C at O site is more stable than that at Zn site. The substitutional C impurity is fo…
Understanding the way in which groups of cortical neurons change their individual and mutual firing activity during the induction of general anesthesia may improve the safe usage of many anesthetic agents. Assessing neuronal interactions within cell assemblies during anesthesia may be useful for understanding the neur…