Materials Literature
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It is shown on the basis of solutions of Maxwell's equations that in the multilayer dielectric electrodynamics structure of the open or closed type with microstrip metal or dielectric elements of final sizes there is generally a division of waves on LE and LM modes.
A new solid-state pseudo binary system BiI3_-Ag2SO4 involving bismuth triiodide (BiI3) and a silver oxysalt namely silver sulphate (Ag2SO4) has been prepared using rapid melt-quenching technique. AC conductivity studies have been carried out on the nine different samples of the (BiI3)x –- (Ag2SO4)(1-x) system with com…
In this paper, we present theoretical model and computations for tuning the photoluminescence (PL) emission of InAs/GaAs quantum dots at 1.3 -1.55 μm by optimizing its height and base dimensions through quantum mechanical concepts. Simulation on the annealing induced compositional change in the QDs was carried out usi…
Abstract. An organic NLO material L-Valinium Picrate (LVP) doped with nickel sulphate (5 mol %) was synthesized and crystals were grown from aqueous solution using slow evaporation method. The solubility, metastable zone width and induction period were determined. The second harmonic generation (SHG) relative efficien…
Nanocrystalline lead oxide was prepared by solvo-thermal technique at a temperature of 75 °C. X-ray diffraction studies show the formation of stable β - PbO at 75 °C and heat treated from 200 to 500 °C for 2 h. Scanning electron micrograph images reveal the change in morphology of PbO particles from spherical to rhomb…
The Gd substituted BaCe0.8Y0.1O3-δ nanocomposites were prepared by a modified Pechini route and then the prepared material was subjected to conventional sintering at 1400°C. The powder XRD results show that the material exhibit orthorhombic crystalline structure and the mean particle size were calculated to be ~40 nm.…
The remarkable evolution of the gas turbine engine has made the world much smaller and provided power for worldwide use. I often think of growing up in a farm environment, being fascinated with machinery and then having the opportunity to take part in the design and development of the world's most complex product. I w…
In the Full Paper by Shore, Zhao et al., the incorrect unit for the gas flow has been used. The correct unit is L min−1. Hence, L s−1 should be replaced by L min−1 at the following positions: Page 2, right column, last paragraph, line 6; page 3, right column, third paragraph, line 9; page 3, right column, fourth parag…
With use of imbedded semi-Markov processes the statistical model of the signal reflected from the Earth's surface is proposed and on the basis of experimental data determined its constituent parameters.
Over the past decade, fuel cell systems have begun to appear as both primary and auxiliary power sources for aircraft. Fuel cells enable quiet electric aircraft with endurances that exceed equivalent battery powered vehicles, but have been limited to efficient fixed-wing aircraft due to low fuel cell power-to-weight r…
MOS device model is designed as a semiconductor channel in which gallium nitride nanotube (GaNNT) with indices (9,0) is used. Numerical parameters of the model are as follows: channel length — 22 nm; thickness of gate insulator HfO 2 — 5 nm; channel width (was considered as a circumference of the nanotube) — 2.89 nm;…
In this work on the basis of use of modern methods of researches in a combination with methods of chemical selective etching structure the surface layer of silicon consisted of area of polycrystalline silicon and area which contained dislocation grids was studied after oxidation and ion implantation. It is shown that…
Pengaruh Rapat Arus dan Waktu Anodizing Terhadap Laju Korosi pada Aluminium Paduan 2024-T3 di Lingkungan Air Laut Fajar Nugroho a ), Mochammad Noer Ilman b ) a) Jurusan Teknik Industri Fak. Teknik Universitas Sarjanawiyata Tamansiswa Jl. Kusumanegara No. 157 Yogyakarta 55165. e-mail : mas_noeg@yahoo.com b) Jurusan Tek…
A number of the developed methods of maintenance of radiation resistance of integrated circuits (BiCMOS and CMOS) is submitted.
Les Alliages à Mémoire de Forme (AMF) sont des matériaux actifs ayant des propriétés mécaniques spectaculaires comparées aux autres métaux : effets mémoire simple et double sens, pseudo-élasticité et amortissement. Les propriétés des AMF ont pour origine physique une transformation austénite martensite pilotée par la…
Using X-ray diffraction methods (XRD), scanning electron microscopy, with microanalysis (SEM with EDS) and positron annihilation spectroscopy (PAS) the Al 2 O 3 , coatings obtained by microarc oxidation under different of deposition conditions were analyzed. It was shown by changing the electrolytic-plasma deposition…
It is well known that the abrasive particles in the abrasive water suspension has significant effect on the erosion characteristics of the inside surface of the nozzle. Abrasive particles moving with the flow cause severe skin friction effect, there by altering the nozzle diameter due to wear which in turn reflects on…
Photo-, cathodo-, and X-ray luminescence of terbium in sol-gel derived films, fabricated in porous anodic alumina is studied. The cell size of the fabricated film convertor of irradiation is about 250 nm. The methods of increase Tb luminescence under diverse excitation conditions are discussed. © 2012 CriMiCo.
The electrodynamic characteristics of a double screen of finite thickness with coaxial-sector waveguides are investigated. Frequency dependences of the reflection coefficient are presented for the case of normal incidence of a plane electromagnetic wave upon the double screen. The reflection coefficient is calculated…
By means of the model of two-layered coverage it was shown the difference in the effects of interaction of electromagnetic radiation with the conducting carbon-containing materials, located on the dielectric and metallic substrates. The calculated dependences of the absorption coefficients on the wavelength, conductiv…