Materials Literature
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The photonuclear technology for explosive detection is based on the recording of the decays of short-lived 12 B and 12 N isotopes. These radionuclides are formed in reactions on 14 N and 13 C nuclei under effect of irradiation by high-energy gamma quanta. Carbon and nitrogen are found in the composition of all explosi…
It has been shown that the presence of narrow-gap quantum jumpers in “dirty” (low concentrations of identical nonmagnetic impurities in the insulator layer) superconductor–insulator–superconductor (S–I–S) junctions results in a significant deviation of the critical supercurrent (Josephson current) in the temperature r…
Comparative analysis of the distribution of magnetic-induction vector components over the volume of a bulk homogeneous sample of 40Kh steel has been carried out under its local magnetization by an attached magnetic device in the absence of a gap in the composite “attached magnetic device–sample” circuit and in the pre…
This work presents approaches to design andimplement three-dimensional (3D) graded index (GRIN) flat lenses consisting of concentric annular segments (in the radial direction). Generally, design of GRIN flat lenses calls for segments with very specific tailored permittivity which makes the realization of the lens chal…
Phosphor-converted light emitting diodes (pc-WLEDs) have been a major approach to achieve white light for general lighting. Phosphor, serving as a color converter, plays an important role determining the chromatic and optical performance of WLEDs. Currently, two forms of phosphor, powdered phosphor and phosphor cerami…
In this report, we propose the design of a novel triple junction solar cell composed of two organic and one organic-inorganic materials namely, PTB7:PCBM, PMDPP3T:PCBM and Perovskite. We initially optimize the thicknesses of the three active materials simultaneously from opto-electronic simulation. Then we estimate th…
The investigations of tungsten transport in T-10 plasma are presented in the current paper. The process of tungsten accumulation in OH discharges and its dependence on parameters n e , I p , and Zeff are discussed. Peaked tungsten density profiles n W (r) are observed in plasmas with Z eff ≈ 1–1.5. In plasmas with Z e…
Abstract The aim of the study was to characterize pedogenic iron forms in the sediments of the Lower Triassic (Buntsandstein) in the north-eastern part of the Holy Cross Mountains. These are sediments of continental origin and unique features as the so-called ‘red beds’. Three main types of rocks were studied – sandst…
Optical prisms are common optical elements containing only optical quality surfaces with Angstrom dimensioned flatness. Prisms are used to disperse, displace, deviate or re-orientate light beams and images. Optical prisms are used in a variety of navigational units for beam deflection and beam control. The prism is a…
The preparation and sonoluminescence of Cr(CO)6 nanodispersed suspensions in water, 83% H2SO4, and 74% H3PO4 are described for the first time. In the spectra of single- and multibubble sonoluminescence of these suspensions, chromium atom lines are found that are analogous to the corresponding lines in the sonoluminesc…
High-quality heteroepitaxial (0001)ZnO:Te/(0001)GaN/(0001)Al 2 O 3 structures have been grown by hydrogen vapor-phase epitaxy in a low-pressure continuous flow reactor. X-ray diffraction analysis of these heterostructures has been carried out, which revealed the high structural quality of thin zinc oxide layers. The s…
Experimental dependences of the electric voltage U ( t ) across an induction magnetic head as it scans a magnetic carrier containing the recordings of magnetic fields due to artificial continuity defects in aluminum plates with a thickness from 1.5 × 10 –5 to 3.0 × 10 –3 m are presented. The strength of the primary ma…
The observed plasticity degradation of Cr–Mo–V heat resistant steel as a consequence of more than 20-year operation at 510 and 300°C is caused by an increase in microdistortions of the crystalline lattice, density of dislocations, and sizes of mosaic blocks. The greatest variation of these microstructure properties in…
This paper presents the fabrication of a SiNy-based photonic integrated circuit (PIC) on top of a CMOS imager sensor (CIS) using semiconductor post processing fabrication technology. The photonic key components consists of SiNyoptical waveguides (WG), grating in/out couplers and Cu vertical mirrors defining the resona…
A strict determination of the mechanisms of redistribution of previously accumulated irreversible strains as a result of additional elastic shock actions on the material is given for a nonlinear gradient model of large elastic–plastic strain. It is shown that this redistribution is limited by rigid transport and rotat…
The explosive mode of operation of an electrochemical actuator is studied. In this mode of operation, we observe explosion of microbubbles containing the oxygen–hydrogen gas mixture that forms in the working chamber of the actuator during electrochemical water splitting by high-frequency pulses of alternating polarity…
Abstract The transpiration of liquefied natural gas (LNG) in pipelines decreases the cost of transfer, and pipes of smaller diameters can be used in this case. Based on system analysis, we developed a mathematical model to determine the pipeline wall thickness for LNG transportation as a function of the pipeline diame…
The main aspects of the technique implemented in the LUCKY-A computer code for solving the transport equation with the use of parallel computations are presented. The basic characteristics and specific features of the program are discussed. The parallel algorithm implemented in the LUCKY-A is developed for application…
Multiwall Carbon Nanotube (MWCNT) thin films were electrodeposited on Indium Tin Oxide (ITO) substrate. The effects of 0.1 % solutions of MWCNT incorporation in methanol with and without 1 mg red phosphorus doping were investigated. The electrodeposited MWCNT films were characterized by current density in methanol sol…
Abstract The modern laying technologies of molding parts made of polymer composite materials are analyzed and compared, and the advantages and disadvantages of sewed fabric fillers are considered. The state of stress in carbon fiber reinforced plastic made of sewed fabric is calculated as a function of the filament th…