Materials Literature
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Nanostructures à base de semi-conducteurs nitrures pour l'émission ultraviolette Ce travail porte sur la conception, l’épitaxie, et la caractérisation structural et optique de deux types de nanostructures, à savoir des boîtes quantiques AlGaN/AIN et des nanodisques AlGaN/AIN sur nanofils GaN. Ces nanostructures ont ét…
In this article the scheme of vehicle’s braking system with partially automated hydraulic brake actuator is presented. The element of automated hydraulic brake – vacuum booster is equipped with adaptive control system actuating unit. Static characteristics of vacuum amplifier with actuating unit of adaptive control sy…
Relevant contributions by Majorana regarding Compton scattering off free or bound electrons are considered in detail, where a (full quantum) generalization of the Kramers-Heisenberg dispersion formula is derived. The role of intermediate electronic states is appropriately pointed out in recovering the standard Klein-N…
A fixed-node diffusion Monte Carlo (FN-DMC) method provides a promising alternative to the commonly used coupled-cluster (CC) methods, in the domain of benchmark noncovalent interaction energy calculations. This is mainly true for a low-order polynomial CPU cost scaling of FN-DMC and favorable FN error cancellation le…
There was considered influence of cyclical variation of temperature (from –60 °C to +60 °C) and duration (1000 h) of thermal impact (+60 °C) on adhesive strength and resistance to direct stroke of paint coating. There were concluded the main regularities and made practically meaningful conclusion on uselessness of app…
Cette these porte sur la synthese et la caracterisation de nouvelles phases bidimensionnelles par microscopie electronique in-situ, notamment la silice (SiO2), des cages nanometriques de carbone similaire a des molecules C20 et le chalcocite (β-Cu2S). Ces etudes ont permis de mettre en evidence les conditions prealabl…
Nanocomposite is new class of polymer composite whish has nanometer-sized dispersion(1–100 nm) and display excellent properties when compared with conventional composites[1-2]. In this study, we prepared bio-nanocomposite based on organically modified enameland chitosan using a solvent solution method. The morphology…
Objectif : Ce travail a pour objectif de mettre en évidence la résistance à l’usure et l’effet d’auto affûtage des disques des machines aratoires fabriqués, consolidés et affutés différemment.Méthodologie et résultats : Les essais au champ ont concerné cinq différents types de disques en série et trois différents type…
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Abstract. As the automotive industry recognized negative effects of road transportation to the environment, it has intensively worked on new technological solutions during several decades, with the goal of reducing the negative environmental effects of vehicles. That is why the priorities of contemporary and future de…
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La fin d'annee 2014 a ete marquee par l'entree en vigueur du nouveau systeme d’etiquetage dans l’Union europeenne. En prime pour la filiere viande, de nouvelles denominations et une generalisation de l’etiquetage de l’origine prevue au printemps. Pas simple au regard du constat de la DGCCRF concernant l'application ac…
Ce travail porte sur la conception, l’épitaxie, et la caractérisation structural et optique de deux types de nanostructures, à savoir des boîtes quantiques AlGaN/AIN et des nanodisques AlGaN/AIN sur nanofils GaN. Ces nanostructures ont été synthetisées par épitaxie par jets moléculaires assistée par plasma (PA-MBE) et…
New version. Adding results about monster groups
The article contains sections titled: 1. History 2. Properties 3. Starting Materials for Zinc Production 3.1. Zinc Minerals 3.2. Zinc Reserves 3.3. Secondary Raw Materials 4. Pretreatment of Raw Materials for the Production of Zinc Metal 4.1. Roasting 4.2. Pyrometallurgical Concentration Processes 5. Production of Zin…
Hydroxyapatite (HAP), similar to inorganic phase in bones, shows good biocompatibility and bioactivity as bone defect repairing material. Recently, nanoscaled HAP shows the special properties differing from bulk HAP in physics, chemistry and biology. This paper demonstrates that HAP nanoparticle (nHAP) possesses the a…
The sequence of computational procedures, which allows when calculating transfer characteristics to use the full range of physical, mechanical and geometrical parameters of the piezoelectric element and the final value of the output electric impedance of the electrical signals generator, is proposed. The method, which…
Long-term draindown is the term adopted in this study to describe the downward flow of binder in a porous asphalt mixture due to the force of gravity at high temperatures experienced during service, especially in warmer climates. The concept of long-term draindown has been qualitatively noted in field observations of…
Abstract Inline‐Rheometer im Einsatz bei der Stärkeextrusion In der Lebensmitteltechnik werden sog. Cerealien oft durch Extrusion von Stärkeschmelzen hergestellt. Während der Aufbereitung und Plastifizierung der Schmelze im Extruder ändert sich durch den thermomechanischen Energieeintrag die Molmassenverteilung der St…
Abstract Abstract. The asymmetrical crystal [Na(15C5)2][Na(15C5)]2(AsMo12O40)]·CH3CN (1) was synthesized. Interestingly, the huge α‐keggin ion AsMo12 is distorted by introduction of CH3CN molecules and adopts a chiral assembly with space group P4. In contrast, the analogous compound AsW12 co‐crystallizes with trace H2…