Materials Literature
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In this study, the optimal design of spacers and fiber glass layer of a metal oxide surge arrester is presented in order to achieve a more uniform electric field distribution, inside and outside the arrester. This is done by using intelligent algorithms and numerical analysis, i.e., Finite Element Method (FEM). The in…
We report the effects of magnetic field (μ0H = 0–7 T) and hydrostatic pressure (P = 1 bar to 9.53 kbar) on electrical resistivity in the phase separated manganite La0.3Pr0.4Ca0.3MnO3. The resistivity shows a first-order transition from paramagnetic insulating to ferromagnetic metallic state at a temperature T = TIM in…
Novel building blocks for the synthesis of supramolecular components based on adamantane-bearing benzylamines were prepared. The binding properties of these amines and the corresponding acetamides towards β-cyclodextrin (β-CD) were studied using mass spectrometry, NMR spectrometry, isothermal titration calorimetry and…
Abstract A chiral nickel histidine compound, [Ni(L‐his)2]×H2O (1, L‐his = anion of L‐histidine), was synthesized in high yield from the reaction of Ni(OAc)2×4H2O and L‐histidine in the presence of 4,4′‐bipyridine under mild reaction conditions. A single‐crystal X‐ray diffraction analysis showed that compound 1 crystal…
We propose a general theme, labeled mechanical electrodynamics, where the relative three-dimensional (3-D) orientation of particles with nontrivial geometries is tracked based on the details of the absorption spectrum beyond a one-dimensional (1-D) distance dependence. Specifically, we simulate absorption spectra of a…
Bacterial cellulose is a pure and highly hydrophilic material with high mechanical strength. Furthermore by adding certain substrates or by manipulating the operating conditions it is possible to change the properties of the bacterial cellulose. The objective of this research is to develop a modified method for fabric…
Magnetic core materials with low loss, high saturation magnetization, large permeability, and operating frequency above 1 MHz are in high demands for the next generation of miniaturized power electronics. Amorphous FeHfB ribbons with thickness around 20 μm have been fabricated through melt-spinning. Different heat tre…
Zinc oxide films were deposited on three different metal coated substrates (gold, nickel and platinum) by aqueous chemical growth method. This paper discusses the effect of metal coated substrates on the morphology and optical properties of grown ZnO films. X-Ray Diffraction (XRD), Field Emission Scanning Electron Mic…
An investigation has been performed to study the effects of convection streams and the movement of dendritic solid on the macrosegregation in equiaxed structure of aluminium cast ingots. The investigation combined laboratory work, metallographic examination and mathematical modelling. The laboratory work involved diff…
The purpose of this work is to research the tribological characteristics and peculiarities of subsurface structure of friction layers formation of the cast Fe-Cr-C (1.2% C, 17–19% Cr) alloys with the copper content lower (0.4%) or higher (14.0%) than its limit of solubility in the matrix of the alloy. The different co…
Abstract Electron density distribution of 2,2′‐dipyridylamine (Hdpa) is studied by single‐crystal X‐ray diffraction method at 120 K. Structural determination reveals that the conformation ofHdpamolecule is thesyn‐anticonformation caused by the intramolecular N···H‐C hydrogen bond between two pyridine rings. TwoHdpamol…
Abstract Kuwait Oil Company has embarked on an ambitious project of drilling development wells to exploit the Najmah-Sargelu and Middle Marrat reservoirs at depths of 14,000 to 17,000 ft. These Jurassic formations consist of layered shales and limestones, which can be heavily fractured and highly pressured. The wells…
International audience
This study is conducted to predict the weld bead geometry, mechanical properties and HAZ dimensions by developing mathematical models following statistical methods. The developed mathematical models in which the data is represented can be programmed, fed to a computer and used to develop an expert welding system. MATL…
Hybrid nanostructures are interesting materials for numerous applications in chemistry, physics, and biology, due to their novel properties and multiple functionalities. Here, we present a synthesis of metal-semiconductor hybrid nanostructures composed of nontoxic I-III-VI semiconductor nanoparticles and gold. Copper…
Dissociation of imino proton(s) in the cavity of the macrocycle of a highly water-soluble, metal-free phthalocyanine ( H 2( H 4 tsppc ); where H 4 tsppc denotes tetrakis{(2′,6′-dimethyl-4′-sulfonic acid)phenoxy}phthalocyaninate) in ethanolic and aqueous solutions has spectrophotometrically been investigated. The spect…
Aluminum/Al2O3/polymer/metal capacitors submitted to a low-power constant current stress undergo dielectric breakdown. The post-breakdown conduction is metastable, and over time the capacitors recover their original insulating properties. The decay of the conduction with time follows a power law (1/t)α. The magnitude…
Effects of elastic coupling between a ferroelectric thick film and a supporting substrate or underlayer with finite thickness on the apparent longitudinal piezoelectric coefficients are analysed in this work. General analytical solutions of the effective d33 converse piezoelectric coefficients of a film–substrate coup…
Abstract A facile soft‐template method to synthesize Pd hollow nanospheres (PHNs) through a one‐pot route in the presence of rhodamine B (RB) at room temperature is demonstrated. RB‐PdCl42− complex formed by an electrostatic interaction is used as sacrificial template, which can self‐degrade to synthesize metal hollow…
Algae and cyanobacteria are capable living under harsh conditions in the natural environments and can develop peculiar survival processes. In order to evaluate radiation shielding properties of green algae; Chlorella vulgaris, Scenedesmus obliquus, and cyanobacteria; Synechococcus sp., Planktothrix limnetica, Microcys…