Materials Literature
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We describe a scheme for quantum anonymous voting of n participants based on the single nitrogen-vacancy centers in diamond. The scheme requires a bipartite entanglement creation between the electronic spins of the two distant NV centers, unitary operation of NV electronic spin together with n nearby nuclear spins of…
Changes of magnetic minor hysteresis loops of tempered martensitic stainless steel (a 12 pct chromium steel) during creep at 873 K under tensile stress of 120 MPa have been investigated. The minor-loop coefficients, which are indicators of internal stress, sharply increase at the primary creep and become nearly consta…
This paper deals with the study of the magnetic field produced by cylindrical Halbach MRI structures. Some MRI structures are generally composed of tile permanent magnets whose polarizations are uniform. The magnetic field produced by such structures undulates versus the azimuthal direction and diminishes the magnetic…
Magnetostriction is an important property of magnetic materials that have many technical applications. It is well known that nanocrystalline magnetic alloys can exhibit excellent soft magnetic properties including small effective saturation magnetostriction. Many research studies have focused on the crystallization ki…
In the paper the method of estimation of equivalent circuit model parameters of deep-bar induction motors from data provided by the finite element model is presented. The investigation towards obtaining the parameters is defined as a nonlinear least squares curve fitting problem. The data points of static characterist…
Pulsed eddy current (PEC) is a new technique of non-destructive material evaluation (NDE). In comparison with other eddy current techniques, PEC uses pulsed excitation that is characterized by wide frequency content and thus the response carries more complex information about a tested object. PEC method is used in man…
Historical overview of technical and ergonomic innovations used in the development of different types of sportswheelchairs throughout the years 1979-2009. In order to get a better understanding which innovations are relevant for performance-enhancement, injury-prevention and improving wheelchair-mobility in general.
Microstructure of as-cast Mg – 2.4 wt.% Ag – 2.5 Di alloy have been examined by means of light microscopy, scanning microscopy (SEM+EDX) and X-ray diffraction (XRD). Results showed that the as-cast dendritic microstructure of the investigated alloy was characterized by divorced eutectic of primary α-phase and intermet…
One of the aims of the NATO Advanced Training Course ‘RADIPER’ (http://natoatcradiper.org.pl) was to demonstrate also a possibility of recognizing an environmental risk by physical measurements. The Valley of the White (Dolina Białego) is an excellent example of mountain beauty situated in wooded sections of the Tatra…
Abstract: Advanced carbon fiber hybrid carbon-ceramic matrix composites are realizing their potential in many thermostructural components for aerospace vehicles. This work presents ab-initio predictions of elastic constants and thermal properties for 2.5D carbon fiber reinforced carbon-silicon carbide hybrid matrix co…
The scales of power losses modeling in magnetic core and structural parts of transformer, taking into account magnetic nonlinearity and skin effect were presented.The original results were deduced from previous Author's works [4–6].
To characterize materials damage the scaling behavior of the deformation structure was analyzed. As a result of that the fractal dimension of surface topography appears to be a suitable parameter assessing different stages of fatigue and residual service time. Since magnetic domain pattern correlates well with the def…
A sort of Left-handed materials (LHMs), which are called PLHMs, were designed by inserting parallel LC resonance elements (PLCREs) into traditional LHMs as isomerization units. The effects of PLCREs were studied numerically by evaluating the transmission spectra of microwaves with both Finite-difference Time-domain (F…
A new, semi-analytic method of calculation of the electromagnetic field distribution in bars of convex cross-cross-section, with sinusoidal current flowing, has been presented. By omitting the Maxwell's displacement current the only problem to solve is the Helmholtz equations within the bar and Laplace ones beyond it.…
Background: Hydatid disease remains an important & challenging medical problem. Case report: A62 year old male patient was admitted complaining of upper abdominal discomfort. Six days earlier he suffered from acute pain in the right upper quadrant, mild systemic allergic manifestation, a fever of 38.5oC and chills. He…
A friction stir welded (FSW) Al alloy sample was investigated by Doppler broadening spectroscopy (DBS) of the positron annihilation line. The spatially resolved defect distribution showed that the material in the joint zone becomes completely annealed during the welding process at the shoulder of the FSW tool, whereas…
This work deals with influence of heat treatment on microstructure and properties of sample cast assigned as a material used for frogs in railway crossover. Materials used in railway industry for frogs (manganese cast steel and forged pearlitic steel) do not fulfil strict conditions of exploitation of railway. One of…
In the paper the procedure for determination of deterred propellant characteristics that are necessary as input parameters in interior ballistic calculations is given. The basic features of developed model for interior ballistic cycle calculation of systems with deterred propellant propelling charge are presented. The…
En este trabajo se compara la resistencia a la corrosion de recubrimientos de CrN y CrN/Cr depositados con el sistema de sputtering con magnetron desbalanceado (UBM) con recubrimientos industriales de Cr y pinturas tipo epoxy. Los recubrimientos UBM fueron optimizados y producidos a temperatura ambiente y con una corr…
The noise generated by the road transportation means is characterized by frequency spectra, acoustic pressure levels and their variations in time. The sources of vibration and noise depend on the transportation mean type. Therefore every transportation mean identifies itself by characteristic frequency spectrum and no…