Materials Literature
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Abstract The thermal evolution of the crystal structure of PrSr3Co1.5Fe1.5O10–d , a member of the n = 3 family of Ruddlesden-Popper compounds, has been studied by means of variable temperature synchrotron X-ray powder diffraction combined with room temperature neutron diffraction studies. This structure takes the idea…
We have measured the micromagnetic properties of a diluted magnetic semiconductor as a function of temperature and applied field with a scanning Hall probe microscope built in our laboratory. The design philosophy for this microscope and some details are described. The samples analyzed in this work are Ga0.94Mn0.06As…
The main purpose of this study is to develop an inexpensive, simple, selective and especially sensitive modified carbon paste electrode (MCPE) for the determination of dopamine (DA) in pharmaceutical and human serum samples. The carbon paste electrode (CPE) has been modified by using [N,N′-bis(2-pyridine carboxamido)-…
Abstract A novel heterotelechelic linear block copolymer of poly(ethylene glycol) (PEG) and poly(succinimide) (PSI) possessing both acetal andtert‐butoxycarbonyl‐amino (Boc‐NH) terminals (Acetal‐PEG‐b‐PSI‐NH‐Boc) with a narrow molecular weight distribution (MWD) was successfully prepared by the nucleophilic attack of…
The behavior of chalcosine in leaching of carbonyl nickel synthesis residues with copper(II) chloride solutions was studied. The chalcosine leaching was examined in relation to the chloride background concentration, and kinetic features of the process were elucidated.
Ceramics are increasingly used in many advanced science and technology due to their excellent properties. Grinding is the most efficient and effective technique to achieve high dimensional accuracy and surface integrity of ground ceramic workpiece at optimum cost efficiency. The indentation/ scratch approaches are wid…
This paper presents a research on the attenuation of cyclic stress amplitude and the variation of microstructure under the action of ultrasonic vibration in crack propagation for Al2O3-ZrO2 composite nano-ceramics. To interpret this phenomenon, the nonlocal theory is introduced to establish the constitutive model unde…
Abstract Our previous study of the structure change of poly(amidoamine) starburst dendrimers (PAMAM) dendrimer of generation 5 (G5) have demonstrated that although the overall molecular size is practically unaffected by increasing DCl concentration, a configurational transformation, from a diffusive density profile to…
In recent years, synthetic hydroxyapatite (HAP) has attracted much interest because of the quest for new generation implants able to promote rapid osteointegration and having longer lifetimes. HAP a major inorganic component of bone, has been increasingly used as a bioceramic coating for load-bearing implants to impro…
Cover: The 42nd World Polymer Congress (MACRO 2008) was held in Taipei in 2008. The aim of this biannually held conference series is to bring polymer scientists and engineers from around the globe to address recent developments and urgent issues in polymer science. The cover shows the evolution of mixing patterns in t…
Le travail présenté dans ce document s'inscrit dans le cadre d'un projet de recherche français de 3 ans dédié à l'utilisation de matériaux composites dans la construction navale. Dans ce projet, il est prévu d'utiliser le code CFD FDS-5 avec un modèle de pyrolyse pour tenir compte de la contribution de cloisons en mat…
In this work, thin films of SnS 2 with increased Bi content were grown by sulphurization of a thin film of Sn:Bi alloy, at temperatures around 300°C. The effect of the Bi concentration on the optical, electrical and structural properties was determined through measurements of spectral transmittance, conductivity and x…
Some remarks on the power states calculation in the electrical circuits have been described. The new equation for Illovici's reactive power has been proposed. Based on Illovici's concept of the reactive power, Emanuel's, Erlicki's and Czarnecki's observation concerning the reactive power properties, the new term of po…
The textile technologist knows that the prediction of the aspect of a finished knitted fabric, by the parameters of yarn evenness, does not agree, often, with the reality. There are fabrics, in the market, with irregular aspect, made with yarns in which we have detected few faults. The conventional criteria that are c…
Al alloy sheets were deformed by ECAP(equal channel angular pressing), asymmetry and frictional rolling without lubrication and subsequent heat treating, the textures and r-values of the samples measured by x-ray diffractometer and tensile tester, respectively. The r and |Δr|-values variations after ECAP, asymmetry ro…
Ice detection technology has changed very little over the last 30 years, relying on indirect methods based on measurement of ambient air temperature and liquid water content to determine icing condition. This paper presents a novel ice detection system offering a viable solution to the problem of detecting ice thickne…
We have simulated the coupling ratios in fully planar NAND arrays. We have shown that floating gate interference is no fundamental limitation for channel lengths down to 15 nm. The main limitation for scaling NAND arrays is the loss of control gate coupling due to fringing fields, leading to a strong increase in the p…
Thermal asperity (TA) causes a crucial problem in magnetic recording systems because it can distort the readback signal to the extent of causing possible sector read failure. This problem becomes more severe in perpendicular recording channels because these channels contain a d.c. component. This paper presents a nove…
In plasmonic data storage a femtosecond laser pulse is focused to a diffraction-limited spot over a small region of an optical disk which contains plasmonic nano-structures. The digital information stored in each bit-cell modifies the spectrum of the femtosecond light pulse, which is subsequently detected in transmiss…
Magnetic field is one of intensive variables which influence phase transformations in solids. In the present study we will show how the characteristics of martensitic transformations are influenced by magnetic field, such as transformation temperature, morphology and kinetics.