Materials Literature
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L'objectiu principal d'aquest treball es l'obtencio d'un material compost totalment biodegradable que competeixi amb el polipropile (PP) reforcat amb fibra de vidre (GF) quant a prestacions mecaniques. Per complir aquest objectiu s'efectuaran processos de deslignificacio als filaments de jute per a ser utilitzats com…
This paper presents the analysis of the modeling error of an approximate model in a Static Light Scattering (SLS) problem for the morphological characterization of particle systems through the estimation of the Particle Size Distribution (PSD). The modelling error of the employed approximate model called the Local Mon…
In this paper the shielding efficiency of an artificial material formed of a periodic structure defined by a unit cell composed of bronze cylinders located between two dielectric planes has been studied.
L’objectiu d’aquest estudi era aconseguir desenvolupar materials nanocompostos utilitzant com a matriu polimerica acid polilactic (PLA) i com a reforc natural nanofibres de cel•lulosa (CNF) d’eucaliptus blanquejat. La intencio del desenvolupament d’aquests materials era obtenir una millora de les propietats mecaniques…
Nanowires made of different materials, namely zinc oxide and vanadium oxide, are interconnected mechanically with the aid of a sharp tungsten tip. The electrical and optoelectrical properties of the interconnected nanowires are measured. The changing photocurrent as a function of laser beam spot location is verified v…
ABSTRACT: Ionic magnetic liquids have provoked great interest in the scientific community over the past two decades due to their interesting properties and possible future applications. This project aims to synthesize and study different kinds of Ionic Magnetic Liquids, focusing in a new dinuclear MIL: bis(1,3-dimethy…
In this article the authors analyze the yield of firefighting external water supply (FEWS) subject to possible damage of pipelines at different sites. Standard methods of assessing water loss dead-end and ring networks FEWS does not take into account the numerous factors which affect the flow of water and also the sce…
سابقه و هدف: باکتری سالمونلا یکی از اعضای خانواده انتروباکتریاسه است. یکی از منابع زیست این باکتری فرآورده های لبنی مانند پنیر می باشد. این مطالعه با هدف جداسازی سالمونلا انتریتیدیس از پنیر های سنتی جمع آوری شده از استان چهارمحال و بختیاری و بررسی فراوانی ژن های مرتبط با ایجاد مقاومت دارویی انجام شد. مواد و روش ها: در…
The thermal state of a 30-t steel-teeming ladle is subjected to CFD simulation. The results obtained are verified by direct measurements of the lining and steel temperatures at various stages of technology under the conditions of an operating electric-furnace shop in a miniplant. The simulation results are used to det…
The processes occurring during the formation of multicomponent diffusion coatings on nickel alloys at the stage of delivery of elements on the article surface when chlorine, bromine, and iodine halides are used as activators are considered. Balance equations and calculated values are given for the partial pressures in…
The physicomechanical properties and thermodynamic stability of segmented polyether urethane containing poly(tetramethylene oxide) segments of different molecular masses ( М ∼ 1000, 1400, 1950) and plasticized with di(2-ethylhexyl) sebacate were analyzed in relation to the molecular mass of the soft segments, and the…
In this paper, a modified Prandtl-Ishlinskii (MPI) model is adopted to describe the asymmetric hysteresis of piezoceramic actuators (PCAs), where a one-side play (OSP) operator is used. The benefit for the improved MPI model lies in the fact that an analytic inverse model of the classical Prandtl-Ishlinskii (CPI) mode…
The atomically flat surface of Bi2Se3due to the van der Waals bonded layer structure can reduce the interface trap. The metal-insulator-metal capacitors using Bi2Se3has better quadratic voltage coefficient of capacitance. This is the first time that atomically flat metal surface is used in electronic devices.
Short-channel zinc oxynitride (ZnON) thin-film transistors (TFTs) were fabricated based on the film profile engineering in combination with e-beam lithographical patterning. ZnON films were deposited using reactive magnetron sputtering in N2/O2ambient and exhibit a Hall mobility of 95 cm2/V-s. A ZnON TFT with channel…
The objective of this project was to create and study materials for temperature sensing in support of detonation studies using thermal luminescence TL technique. Commercial materials were investigated and the new TL materials were developed. The best candidate materials, specifically LiF, Li2B4O7, MgB4O7, and CaCO4, w…
Ge-dot/SiO2/SiGe-channel photoMOSFETs are demonstrated on a Si-photonics platform. The photoMOSFET is fabricated in standard CMOS processes with a self-organized gate stack of Ge-dot/SiO2/SiGe-channel using thermal oxidation of SiGe nanopillars over Si3N4layers on Si substrates. The Ge-dot photoMOSFET, with 3μm channe…
Scalable synthesis of thin tungsten diselenide (WSe2) films on 4-inch silicon substrate with 80 nm silicon dioxide (SiO2) is demonstrated. Cross-sectional transmission electron microscopy (TEM) reveals good control of WSe2layers. Raman spectroscopy confirms high quality crystal of WSe2is achieved. Back-gated field-eff…
How can airlines save money with effective preventive maintenance of the airframe? Henry Canaday reports on the paints and coatings being used to meet the challenge.
While two-dimensional (2D) materials continue attracting an increasing amount of interest in the scientific community, the main question remains what type of application will benefit most from their unique 2D properties. Transition metal dichalcogenides (TMDs) combine 2D transport properties with a sizable bandgap, bu…
In rail operation (with traffic corresponding to passed tonnage of gross loads of 500 and 1000 million t), the surface layer of the steel is significantly strengthened. Electron-microscope data permit quantitative analysis of the contribution of different mechanisms to rail strengthening in prolonged operation, at dif…