Materials Literature
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In the density functional theory approximation, we have calculated the phonon dispersions and the densities of vibrational states of the 2 H , 3 C , 4 H , 6 H , and 8 H hexagonal polytypes of diamond. We have found that a one-dimensional incommensurate modulation of the structure arises along the hexagonal axis, the p…
The limitation of human five main senses to detect the Nano-scale organism has introduced the idea for researcher in development several kinds of devices or sensors. The Surface Acoustic Wave (SAW) devices which wisely use in telecommunication field at the early time had been integrated into biosensor which able to de…
Phyllotaxis is the study of arrangements of leafs and orets. The topology of triangular spiral (multiple) tilings with opposed parastichy pairs is intimately related to the phyllotaxis theory and continued fractions. It is shown that, if the divergence angle of the genetic spiral is given as a quadratic irrational and…
Ti6Al4V component has been formed by hot isostatic pressing (HIPping) using internal graphite mould with Ni isolation layer. The shape of the graphite had no deformation after HIPping. The Ni isolation layer with a thickness of approximately 5μm on graphite before HIPping was diffused into the dense Ti6Al4V component…
The polarized reflectance spectra of single crystals of the low-dimensional organic conductor (EDT-TTF) 4 [Hg 3 I 8 ] undergoing a metal-insulator phase transition at a temperature T < 35 K have been presented. The spectral region of the study is 700–6000 cm −1 (0.087–0.74 eV), and the temperature range is 300–9 K. It…
Axial compressive simulations are performed on defective and non-defective multiwalledcarbon nanotubes (MWCNTs) using the molecular dynamics method, and the effectof defects upon the buckling behavior is discussed. In our previous study, changes in atomicstresses in MWCNTs with three layers were evaluated until buckli…
A phenomenological model of thermodynamic potential is constructed that describes phase transitions in homogeneous monodisperse solutions of achiral carbon tubes in liquid crystal. Possible phase diagrams of such a systems are constructed and investigated.
Low-temperature (80 K) measurements are made of the frequency dependences of the real and imaginary parts of the complex dielectric constant and complex electric modulus of bismuth lanthanum manganite Bi 0.5 La 0.5 MnO 3 ceramic. The presence of two (low- and high-frequency) regions of dielectric retardation and relax…
M Terauchi, H Takahashi, N Handa, T Murano, M Koike, T Imazono, M Koeda, T Nagano, H Sasai, Y Oue, Z Yonezawa, S Kuramoto; Present State of TEM-SXES Analys
With the development of the electronics industry and widespread supply of many different electrical appliances, the factors of the electrical fires are also diversified. For this reason, the fuse, safety-critical component, needs accurate and stable operating characteristics for preventing various fire factor, and als…
The seek for sustainability in the global economic scenario has led to the need for developing materials that provide higher productivity, greater speed of operation, extended lifetimes and enhanced surface finishing of engineering parts. To achieve these goals it is essential to modify the metal surface with respect…
The paper deals with the application of numerical computational tools for the hysteretic curve identification using Karray-Bouc and Ramberg-Osgood models. The Karray-Bouc model parameters will be determined from Ramberg-Osgood model and Manson-Coffin curve parameters. Using special MATLAB’s procedures we can calculate…
This paper deals with the evaluation of crystalline structure and thermal properties of injection molded parts based on polylactic acid (PLA) matrix reinforced by banana and hemp natural fibres (NF). Using differential scanning calorimetry (DSC) and wide angle X-ray diffraction (WAXD) methods were evaluated thermal pr…
The excitation of the nonlinear medium based on the zigzag nanotubes is analyzed. The terahertz emission is demonstrated under excitation in spite of an equidistant spectrum of a single nanotube. The system exhibits relatively high absorbance in the absence of pumping due to a relatively large oscillator strength.
A 5-μm-thick film of a niobium-tin solid solution (18.3 at % Sn) grown by ion-plasma sputtering with subsequent codeposition of ultrafine metal particles is irradiated by a fast proton flux with a fluence of 1019 p +/cm2. X-ray diffraction analysis carried out using CuK α (λ = 0.154178 nm), CoK α (λ = 0.179021 nm), an…
Interactions in the ZnBr 2 -CO(NH 2 ) 2 -HBr-H 2 O quaternary system at 25°C were studied using the solubility method. The crystallization regions of the initial eutonic compositions, constituent ternary systems, binary compounds of carbamide with zinc bromide and hydrobromic acid, and two new coordination compounds Z…
Eric Lifshin, Yudhishthir P Kande, Richard L Moore, Siwei Lyu; Improved SEM Image Resolution Through the Use of Image Restoration Techniques, Microscopy an
The paper describes measurement and non-parametric estimation of the phase difference with stronger inhibition of the spectral leakage. Phase difference is estimated by DFT coefficients around the component peaks using the Rife-Vincent windows class I and the minimum side-lobe level windows.
The objective of this study was to investigate the beating properties of two types of cotton pulps such as "cotton lint mixed pulp" and "cotton linter pulp". In order to improve refining characteristics, the effects of carboxymethyl-cellulose (CMC) pre-treatment, mixing ratio changes of cotton lint mixed pulp and cott…
The article deals with the issue of ensuring the reliability of aircraft engines operation via hydraulic fluids properties monitoring. There are presented the results of the hydraulic fluid Aero Shell Fluid 41 (ASF 41) properties evaluation in the hydraulic system of a double-flow turbosupercharged aircraft engine AI-…