Materials Literature
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Stresses around two parallel cracks of equal length in an infinite elastic medium are evaluated based on the linearized couple‐stress theory under uniform tension normal to the cracks. Fourier transformations are used to reduce the boundary conditions with respect to the upper crack to dual integral equations. In orde…
Direct numerical simulations of a deformable droplet approaching a planar solid wall through another fluid are performed to investigate the droplet dynamics and thin film drainage. The numerical approach solves the full Navier–Stokes equations and the interface is located by a moving mesh interface tracking method wit…
A novel octadentate ligand derived from the core structure of EGTA (ethyleneglycol-bis(2-aminoethylether)-N,N,N',N'-tetraacetic acid) with two piperidine-cis-dicarboxylic acid moieties spaced by a triethylenedioxy chain (L1) has been synthesised with the aim to assess the effect of the structural rigidity on the therm…
The material-point method (MPM) is a numerical method for dynamic or static analysis of solids using a discretization in time and space. The method has shown to be successful in modelling physical problems involving large deformations, which are difficult to model with traditional numerical tools such as the finite el…
It was shown that the chemo-and stereoselective alkylation of the lower rim 1, 3-disubstituted p-tert-butyl thiacalix[4] arenes in the cone conformation using 2-chloro-N,N-diethylacetamide is determined by both the nature of the base and the position of the anthraquinone fragment in relation to the amide group: in the…
We performed series of multi-step loading tests in our Kolsky bar system, and demonstrated that the thermal softening in strong aluminum alloys can be eliminated by multi-step loading. We showed that there is a significant difference in their stress-strain curves, compared with the result of a single shot test, due to…
Abstract Motivated by recent experimental findings in chemical synthesis of colloidal particles, we draw an analogy between self-assembly processes occurring in biological systems (e.g. protein folding) and a new exciting possibility in the field of material science. We consider a self-assembly process whose elementar…
Purpose: In this paper the analysis of influence of heat treatment on the structure and properties of AMM type (Co 70.5 Fe 2.5 Mn2Mo 1 Si 9 B 15 ) metallic glass was shown. Moreover the discussion of the changes of tensile strength, plasticity, cracking energy, remanence, coercive force, resistivity, crystallization e…
Fibrous cellulose made from wood pulp was mechanically milled into flake-shaped cellulose particles(FS-CPs) using a planetary ball mill with additives under several conditions. The average particle diameter of the FS-CPs was ca. 15μm, and the particles were available in a variety of thicknesses by changing the kind of…
The effects of the applied voltage(U), equivalent salt deposit density (ESDD) and relative humidity density(RH) on the leakage current (LC) are studied based on the least squares algorithm (LSA) in this study. Experiments' results show that, the maximal amplitude of LC Ih increases with the increase of ESDD by an po…
A hyphenated HPLC-ICP-OES method for the direct determination of the metal to ligand mole ratios for the series of individually separated PtII/IV chlorido–bromido [PtCl4]2−, [PtCl6]2− and [PtCl6−nBrn]2− (n = 0–6) species by simultaneous monitoring of the Pt (177.708 nm), Cl (134.724 nm) and Br (148.845 nm) ICP emissio…
The affinities of bi- and polycyclic aromatic compounds for nitrosonium ion ( $A_{NO^ + } $ ) were calculated at the RI-MP2/L1 and DFT/PBE/3z levels of theory. Both methods gave generally similar geometric parameters of nitrosonium complexes. The formation of pincer complexes in which the NO+ ion is linked to two arom…
Se presenta la estrategia para desarrollada para la clasificación sensorial de gelatinas obtenidas de patas de pollos utilizando redes neuronales basadas en los algoritmos de Kohonen. Estas redes muestran ser buenas herramientas para hacer las comparaciones sensoriales entre muestras, permitiendo identificar cuáles so…
Inclusion of the organometallic MLn = [HOC 5 H 4 NCp 2 TiCl][PF 6 ] (1), HOC 5 H 4 NW(CO) 5 (2), HOC 5 H 4 NMo(CO) 5 (3), [HOC 6 H 4 CH 2 CNCp 2 TiCl][PF 6 ] (4), HOC 6 H 4 CH 2 CNW(CO) 5 (5) and HOC 6 H 4 CH 2 CNMo(CO) 5 ( The inorganic-organic hybrid nanocomposites were pyrolyzed under air at 800C to give nanostruct…
The paper deals with an application-specific integrated circuit (ASIC) facilitating voltage conversion in thermoelectric energy harvesters. The chip is intended to be used to boost up the voltage coming from a thermoelectric module to a level that is required by electronic circuits constituting wireless sensor nodes.…
We experimentally report nonlinear enhanced Raman spectra (NLERS) at high excited states, using SERS and TERS. The Darling–Dennison resonance, Sun–Wang resonance in SERS and rotation-resolved Darling–Dennison resonance in TERS in high vacuum were successfully observed, due to the strong anharmonicity, which promote de…
Radioactivity, natural and man-made, is omnipresent in the earth's crust in different amounts. Natural radioactive materials under certain conditions can reach hazardous radiological levels. So, it becomes necessary to study the natural radioactivity levels in soil to assess the dose for the population in order to kno…
Growth kinetics of CdSe nanocrystals generated inside three selected polymers (polyvinylpyrrolidone--PVP, polyethyleneglycol--PEG and polyvinylalcohol--PVA) are demonstrated to follow a self-catalytic path, with growth rates depending on the nature of the polymer, i.e. on the capability to activate the cadmium species…
Remains of a prehistoric ceramic object, a moon-shaped idol from the Bronze Age found in archaeological site Zdiby near Prague in the Czech Republic, were studied especially in terms of the firing temperature. Archaeological ceramics was usually fired at temperatures below 1000?C. It contained unstable non-crystalline…
The supercapacitors are characterized by fast discharge rate and easy for maintenance. Their demand is predicted to be most extensive in frequency regulation applications. The other area for significant growth is in regenerative braking for grid–connected light rail systems. In this research we fabricated a Supercapac…