Materials Literature
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Using electron spin resonance (ESR), we report on the observation of a first Ge dangling bond (DB)-type interface defect in the SiO(2)/(100)Ge(x)Si(1-x)/SiO(2)/(100)Si heterostructure manufactured by the condensation technique. The center, exhibiting monoclinic-I (C(2v)) symmetry with principal g values g(1) = 2.0338…
Abstract Novel pH‐responsive polyglycerol (PG)‐based hydrogels were successfully synthesized through the reaction of epichlorohydrin with L‐lactic acid (LLA) in the presence of sodium hydroxide (NaOH), and cetyltrimethylammonium bromide as a phase transfer catalyst at room temperature, followed by hydrolysis, polymeri…
We present the first evaluation of a recently developed silicon-strip detector for photon-counting dual-energy breast tomosynthesis. The detector is well suited for tomosynthesis with high dose efficiency and intrinsic scatter rejection. A method was developed for measuring the spatial resolution of a system based on…
The radiation-induced fragmentation of the ${\text{C}}_{60}$ fullerene was investigated by tight-binding molecular dynamics simulations based on the parametrization of Papaconstantopoulos et al. [Tight-Binding Approach to Computational Materials Science, edited by P.E.A. Turchi, A. Gonis, and L. Colombo, M.R.S. Sympos…
The oxidation behaviour of austenitic stainless steels in the temperature range 723–1173 K is strongly influenced by the grain size of the oxidizing alloy. In this work the evolution of the concentration profiles of Cr, Ni and Fe in the substrate below a growing Cr2O3 layer is simulated with a Fisher-type numerical mo…
A novel ternary compound U(3)Ru(4)Al(12) has been identified in the U-Ru-Al ternary diagram. Single-crystal x-ray diffraction indicates a hexagonal Gd(3)Ru(4)Al(12)-type structure for this uranium-based intermetallic. While this structure type usually induces geometrically a spin-glass behaviour, an antiferromagnetic…
The aim of this paper is to present a robust model based on permeance network method (PNM) for the diagnosis of electrical machine stator faults. The proposed model allows taking into account the local magnetic saturation of the magnetic circuit due to heavy stator fault currents and remains moderately time consuming…
A comprehensive experimental study was performed to identify and discriminate mechanisms contributing to passive intermodulation (PIM) in microstrip transmission lines. The effects of strip length and width, and substrate materials on PIM performance of printed lines were investigated in the GSM900, DCS1800 and UMTS f…
A new view: A picture of the different non-covalent interactions relevant for the self-assembly of organic layers and their spectroscopic fingerprints is provided (see figure). In particular, state-of-the-art spectroscopic measurements are performed for supramolecular assemblies, comparing the electronic structure of…
Abstract We have studied the potential of thin‐film photovoltaic devices provided with an intermediate band (IB). Cu‐containing chalcopyrites appear as promising candidates, with maximum theoretical efficiencies above 45% under ideal conditions. This figure has been re‐evaluated by considering a number of non‐idealiti…
Characterization of 'unknown' proteins is one of the challenges of the post-genomic era. Here, we report a study of Bacillus subtilis YdiB, which belongs to an uncharted class of bacterial P-loop ATPases. Precise deletion of the ydiB gene yielded a mutant with much reduced growth rate compared to the wild-type strain.…
The majority of existing models for estimation and control of switched reluctance machines (SRMs) ignore the dynamic effects of mutual coupling between different phases. Although this may be acceptable for some common industrial applications, such a simplification may degrade significantly the performance of the drive…
Model refinements of magnetic circuits are performed via a subproblem finite element method based on a perturbation technique. An approximate problem considering ideal flux tubes and simplified air-gap models is first solved. It gives the sources for a finite element perturbation problem considering the actual air gap…
Transformer thermal performance is a critical issue during the design stage, since it indicates its ability to operate reliably through its lifetime and under possible overloading conditions. This paper introduces a hybrid thermal modeling technique that links numerical methods to analytical calculations, providing a…
High-kappa films are currently deposited on Ge substrates to compensate the mobility loss, as Ge offers higher mobility compared with that of silicon. This paper deals with the reliability characteristics of cerium oxide films grown by molecular beam deposition on n-type Ge (100) substrates. MOS capacitors with Pt gat…
The local reactivity of hydrogenated platinum clusters (Pt clusters) has been studied using the regional density functional theory method. We observed that antibond orbitals constitute the preferable binding site for hydrogen molecules H(2). Those sites are characterized by lowered electronic chemical potential and st…
Maintenance of reinforced concrete is a major concern around the world. In particular, special attention is now given to chloride induced corrosion, which is considered as one of the most serious causes of concrete deterioration. Since corrosion is an electrochemical process, the influence of temperature on the deteri…
The structural and energetic effects due to gold adatoms and/or gold surface vacancies in ethylthiol/Au(111) self-assembled monolayers (SAMs) in the high-density regime have been studied. The stability of these SAM structures was evaluated based on adsorption and surface energies that allow a direct comparison of stru…
The paper deals with detailed investigation of the electromagnetic forces in the end zone of turbine generator. The electromagnetic field is analyzed using 3-D FEM computation. The regions of interest are the stator and rotor end cores including the zone of the teeth and the end windings. The dynamic behavior of the l…
In this paper, we investigated rotor iron loss of interior permanent magnet synchronous machine (IPMSM), which has distributed armature windings. In order to study the iron loss with the effect of slot-pole combination, two machines for high-speed operation such as electric vehicle were designed. One is fractional slo…