Materials Literature
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Specific heat and magnetoresistance of the organic superconductor $\ensuremath{\kappa}\ensuremath{-}(\mathrm{BEDT}\ensuremath{-}\mathrm{TTF}{)}_{2}\mathrm{Cu}[\mathrm{N}(\mathrm{CN}{)}_{2}]\mathrm{Br}$ were measured simultaneously at temperatures near the superconducting transition. The magnetic field was aligned exac…
A method is presented to compute the eddy current losses in laminated nonsaturated iron cores based on the finite element method. In the first step, a three-dimensional model of the core treated as a bulk of anisotropic material with low conductivity in the direction normal to the lamination is analyzed. Each laminate…
A new procedure for chemical modification of poly(vinyl alcohol) (PVA) was established by a glycosidation reaction of hydroxyl groups in PVA with triacetylated sugar oxazoline 1. 1H and 13C NMR analyses indicated that triacetylated N-acetyl-D-glucosamine (GlcNAc) was introduced onto a PVA backbone selectively via a β-…
Three different fluoro-terminated hyperbranched poly(ether ketone)s (FHBPEKs) with variable degrees of branching and their linear analogous poly(ether ketone) (LPEK) whose chemical structure and molecular weight were similar to those of the FHBPEKs were synthesized. Cyano-terminated hyperbranched poly(ether ketone), C…
We have prepared two series of dimeric compounds, which comprise the schiff's base mesogen, alkyl spacer with the carbon number of 5 and alkyl or alkoxy tail with the carbon number of m = 4∼16. In these compounds, we observed three types of smectic liquid crystals, the single layer phase with the tail group randomly m…
Many authors have suggested new forms to describe the surface anchoring energy of the liquid crystal-wall interface, replacing the Rapini-Papoular (RP) formula g s = (1/2) A sin2 theta. If the RP function is considered as the primary approximation, and a lowest order modification is included, then the surface anchorin…
Abstract In vulcanization, chemical crosslinks are formed across elastomeric polymer chains improving both the strength and elastic properties of the rubber. An understanding of the formation, structure, and stability of vulcanizates is therefore very important. Solid-state NMR and NMR imaging have been effective meth…
Experimental results reveal that the dielectric permittivity depends strongly on the amplitude of the ac test signal, and the polarization varies with time in $\mathrm{SrTi}{(}^{16}{\mathrm{O}}_{1\ensuremath{-}x}^{18}{\mathrm{O}}_{x}{)}_{3}$ single crystals. These characteristics are attributed to the occurrence of a…
This paper presents a novel method to optimize the transposition design for large current winding of power transformer. The multi-section quasiaxisymmetrical scheme is used for the magnetic field-electric circuit coupled analysis and circulating current calculation. The improved genetic algorithm combined with complex…
Tracers (sulphur particles produced in situ by a bubble itself, fuchsin spots and dust) were used to probe the liquid flows in the neighborhood of single sonoluminescent bubbles maintained in levitation in a resonant acoustic setup. The flows caused by the bubble were distinguished clearly from the streamings (mean La…
Recent research on fouling where composite fouling in aqueous media may be present is reviewed. In practical industrial applications, usually several types of fouling occur simultaneously; however, due to the complexity of fouling, various types of fouling are studied in isolation. Crystallization (precipitation) foul…
Polydextrose (Litesse) provides physiological effects consistent with dietary fiber. However, AOAC methods for measuring total dietary fiber (TDF) in foods include an ethanol precipitation step in which polydextrose and similar carbohydrates are discarded and therefore not quantitated. This study describes a method de…
Beam-shaping diffractive optical elements give a desired intensity distribution in the diffraction plane over areas much larger than the diffraction limited spot size. Such elements can be designed using geometrical optics methods or iterative-Fourier-transform algorithms (IFTAs). The usefulness of geometrical optics…
Single Al-Pd-Re icosahedral quasicrystals with a maximum diameter of 5mm have been grown by a slow cooling method on the basis of a partial phase diagram determined in the present study. Laue X-ray and electron diffraction verified the highly ordered structure of the single icosahedral quasicrystals. The electrical re…
The reactions of maleic anhydride (MA) have been investigated on the “near” stoichiometric and substoichiometric surfaces of TiO2 by temperature programmed desorption (TPD). Moreover, self-consistent field semiempirical PM3 calculations of MA over relaxed and unrelaxed Ti13O45H38 rutile clusters [simulating the rutile…
The single-crystal X-ray technique was used to calibrate a new intracrystalline geothermometer based on equilibrium Mg-Fe* fractionation (Fe* = Fe 2+ + Mn 2+ ) between M1 and M2 sites of natural P2 1 /c pigeonite. Suitable crystals free of exsolution textures and sharp diffraction maxima were selected by careful TEM a…
Silicon is the “veteran” semiconductor in the management of electrons. The recent quest for optoelectronic and photonic materials suggests that new architectures of silicon structured over multiple length scales may still be the optimum material for the transition from electron-based to photon-basped computers and com…
ADVERTISEMENT RETURN TO ISSUEPREVCommunication to the...Communication to the EditorNEXTSynthesis and Characterization of Linear−Dendritic Aromatic Etherimide Copolymers: Tuning Molecular Architecture To Optimize Properties and ProcessabilityLarry J. Markoski, Julie L. Thompson, and Jeffrey S. MooreView Author Informat…
The structure of a dispersion of monodispersed, plate-shaped colloidal particles has been investigated under shear. The dispersion displays a columnar phase when at rest, and if subjected to shear at low rates (0.1-1 s(-1)), this structure aligns with the axis of the columns in the flow direction. At low shear rates,…
The aim of this research is to construct an appropriate back-propagation neural network topology to automatically recognize neps and trash in a web by color image processing. After studying the ideal background color under moderate conditions of brightness and contrast to overcome the translucent problem of fibers in…