Materials Literature
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An inductance determination method that can be based on both experiments and calculations is discussed in this paper. The inductances of a four-quadrant transducer (4QT) prototype machine were measured and calculated with the two-dimensional time-stepping finite-element method (FEM), and the measured and calculated re…
A transient electric field takes place in gas-insulated switch-gears (GIS) while lightning impulse voltage is imposed on it. Taking permittivity, conductivity, and polarization loss into consideration, the differential equations of transient field are deduced, where the response caused by lightning impulse voltage is…
In this paper, practical left-handed (LH) metamaterials known as composite right/left-handed (CRLH) metamaterials for microwave devices are discussed. In particular, recent advances and novel devices based on the CRLH metamaterial at the authors' research lab are presented.
Abstract Poly(vinyl alcohol)‐ graft ‐poly(1,4‐dioxan‐2‐one) (PVA‐ g ‐PPDO) with designed molecular structure was synthesized by a solid‐state polymerization. The solid‐state copolymerization was preceded by a graft copolymerization of PDO initiated with PVA as a multifunctional initiator, and Sn (Oct) 2 as a coininiti…
Phage display has been used to find an amino acid sequence that shows binding affinity for surface defects in germanium. A general approach called “diffuse selection” is employed to find consensus peptide sequences (see figure) demonstrating binding specificity for highly defective crystal surfaces versus non-defectiv…
Representation of multi-winding transformers by equivalent circuits has been recently improved and so it is for the identification of its components. In this paper, focus is on magnetic coupling with its related losses. A general method, based on impedance measurements, is used to determinate inductances, coupling rat…
The graft copolymerization of acrylonitrile (AN) onto butadiene rubber (BR) was carried out in toluene at 80°C, using dibenzoyl-peroxide (BPO) as initiator. The synthesized poly acrylonitrile-grafted-butadiene rubber (AN-g-BR) was characterized by N% elemental analysis and Fourier-transform infrared (FT-IR) spectrosco…
To solve a magnetodynamics problem, two potential formulations can be used. In the case of the A-psi formulation, the voltage at the terminals of a conductor is naturally imposed, which is not the case for the current flowing through the conductor. On the contrary, for the T-Omega formulation, the current can be natur…
This paper describes the utilization of two-dimensional vector magnetic property for the advanced magnetic field analysis which is called the magnetic characteristic analysis. There are some possibilities to develop new applications using the magnetic characteristic analysis and the vector magnetic property. This is d…
The growth of LaCl 3:Ce 3+ crystal by the vertical Bridgman process in a nonvacuum atmosphere is reported in this communication. According to the dehydration procedure of LaCl 3 ·7H 2 O and CeCl 3 ·6H 2 O investigated by differential thermal analysis/thermogravimetry, anhydrous LaCl 3 and CeCl 3 were prepared by heati…
The effect of filler loading and epoxidation on curing characteristics, dynamic properties, tensile properties, morphology, and rubber-filler interactions of paper-sludge-filled natural rubber compounds have been studied. Two different types of natural rubber, SMR L and ENR 50, having 0% and 50% of epoxidation and con…
In a high-temperature superconducting (HTS) transformer leakage magnetic field, especially its radial component, decreases the critical current and increases the ac losses in the tapes. Because of zero resistance of HTS tapes a slight unbalance among the branch inductances of the windings may result in heavy circulati…
The influences of popular blowing agents (BAs), both chemical and physical types, in solution with a thermoplastic polyolefin (TPO) were investigated with an in-line capillary rheometer nozzle attached to a conventional reciprocating 55-ton injection molding machine. In the experiments, two types of masterbatch chemic…
The intermediate frequency modes (IFM) of single-walled carbon nanotubes (SWCNTs) and double-walled carbon nanotubes (DWCNTs) were analyzed by Raman spectroscopy and in situ Raman spectroelectrochemistry. The inner and outer tubes of DWCNTs manifested themselves as distinct bands in the IFM region. This confirmed the…
The electronic properties of the antiferromagnetic layer compound copper hydroxonitrate $[{\mathrm{Cu}}_{2}(\mathrm{OH}{)}_{3}{\mathrm{NO}}_{3}]$ are investigated by high-resolution single-crystal x-ray diffraction at $114\phantom{\rule{0.3em}{0ex}}\mathrm{K}$. A pseudoatomic multipolar model is used to reconstruct th…
Thermoplastic natural rubber (TPNR) as polymer matrix was prepared by the melt blending method. Nickel-cobalt-zinc (NiCoZn) ferrite as a filler was prepared by the double-stage sintering method in air. The filler was incorporated in the polymer matrix using a Brabender internal mixer. The filler content was varied fro…
In this paper, the piezoresistive pressure-sensing property of porous silicon has been reported. The pressure sensitivity of a porous silicon membrane of 63% porosity and 20-/spl mu/m thickness has been observed to be about three times more than that of a conventional bulk silicon membrane of the same dimensions. The…
This paper describes optimized conditions for the electropolishing of austenitic type 304 and 316L stainless steels in commercially-available EPS 4000 solution (based on a mixture of phosphoric and sulfuric acids) for use in cardiac stenting applications. Electropolishing parameters such as electrolyte temperature and…
The eddy current is induced in silicon steel sheets of core block of power reactor due to the fringing flux, and this causes a local overheating. An exact and quick calculation using three-dimensional finite element method is important in order to design a reactor without such a local overheating. If each lamination o…
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