Materials Literature
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This paper analyzes rotor eddy-current loss in permanent-magnet brushless ac machines. It is shown that analytical or finite-element techniques published in literature for predicting rotor eddy-current loss using space harmonic based approaches may not yield correct results in each magnet segment when one magnet-pole…
Be my guest! A macrocyclic hexamer, the structure of which is reminiscent of part of the bamboo-plant stem (see picture), was directly prepared by the condensation of a glycoluril derivative and formaldehyde. The macrocycle bound halide anions with high affinity and selectivity.
The high work to volume ratio and the stress recovery of Shape Memory Alloy (SMA) thin films with temperature makes them an ideal choice for microactuators. However, these materials have not gained widespread acceptance due to issues associated with phase transformation. Primary concerns are rapid change in stress at…
The potential use of Shape Memory Alloys (SMAs) as micro-actuators promotes study of the behaviors of these materials at small length scales. The recovery of micro-indentations due to the shape memory effect has recently become an area of particular interest. Experimental observation indicates promising microactuation…
In recent years, the electrospinning process has become one of the most interesting processes to obtain nanofiber webs with interesting properties for uses in a wide variety of industrial sectors such as filtration, chemical barriers, medical devices, etc., as a consequence of the relatively high surface-to-volume rat…
Optical emission spectroscopy (OES) and spectroscopic temperature determination were carried out to study C(2)H(4)/C(2)H(2)/O(2) flames used for diamond deposition with and without an excitation by a wavelength-tunable CO(2) laser. Strong emissions from C(2) and CH radicals were observed in the visible range in all th…
In this study, different amounts of lubricant were applied to air-jet polyester, polyester-spun, core-spun (poly/poly) and cotton ring sewing threads having the same final count. Mechanical and frictional properties of these sewing threads were measured. An evaluation was made in order to determine the effect of the a…
A polymer-drug conjugate was developed by conjugating doxorubicin (DOX) to [alpha],[beta]-poly[(2-hydroxyethyl)-L-aspartamide] (PHEA) with a succinic spacer. The suitability of PHEA-DOX in intraperitoneal chemotherapy was investigated both in vitro and in vivo. The results showed that the release rate of DOX from PHEA…
The viscosity-temperature relationship obtained by us for several glasses over a wide temperature range was analyzed by extending the Adam-Gibbs theory to the range below the glass transition temperature (T(g)). The entropy change of the intermediate-range orders (IROs) is discussed on the basis of the theory develope…
The dynamic behavior of the single-crystal Al under [001] uniaxial strain is simulated by classic molecular dynamics. The fcc–hcp structural transition is successfully observed when the loading pressure reaches about 90 GPa, and the reverse transition is also found with hysteresis. The mechanism and morphology evoluti…
Shape memory polymers (SMPs) are an emerging class of active polymers that have dual-shape capability, and are therefore candidate materials for multifunctional reconfigurable structures (i.e., morphing structures). However, the SMPs have not been fully tested to work in relevant environments (variable activation temp…
We synthesized bulk isotropic and anisotropic Nd13.5Fe77.5Co3B6and Nd13.5Fe76.5Co3Zr1B6magnets by spark plasma sintering (SPS). For hot-pressed magnets, the values of remanence (Br) and coercivity (Hci) decreased with addition of Zr. After hot-deformation, it was difficult to obtain the desired alignment for Nd13.5Fe7…
A mathematical model of measuring transmittance of infrared (IR) radiation through fabric is presented here. Combined with a specially made blackbody, a Fourier transform infrared (FT-IR) spectral radiometer was developed to measure the transmittances of polyester (PET) and cotton fabrics within the range of 8—14 µm a…
Abstract The influence of the doping level in the formation of specific interactions between plasmid DNA and PEDOT is investigated using experimental assays and theoretical calculations. Electrochemical methods are used to prepare polymer samples with oxidation degrees ranging from 0.14 to 1.05 positive charges per re…
The configurational heat capacity, shear modulus and shear viscosity of a series of Na 2 O–Fe 2 O 3 –Al 2 O 3 –SiO 2 melts have been determined as a function of composition. A change in composition dependence of each of the physical properties is observed as Na 2 O/(Na 2 O + Al 2 O 3 ) is decreased, and the peralkalin…
The size and doping dependence of the electron-hole exchange interaction in Si nanowires is investigated from first principles. In pure Si nanowires we found excitonic exchange splittings in very good agreement with the experimental results for porous silicon. For $n$-doped Si nanowires a giant singlet-triplet splitti…
The structural and dynamical properties of macromolecules in confining or crowded environments are different from those in simple bulk liquids. In this paper, both the conformational and diffusional dynamics of globular polymers are studied in solutions containing fixed spherical obstacles. These properties are studie…
The leakage current measurements on standard post insulators and on rod insulators without sheds were carried out. The porcelain and silicone rubber insulators were tested at the Glogow station under the voltage of 75 kV. It was shown that the currents on porcelain insulators are sometimes greater than the currents on…
Structure property correlation is a critical textile research area explored by various researchers and many factors have been proposed over the years to predict/compare/design the woven fabrics. Cross-over firmness factor (CFF) and floating yarn factor (FYF) have been recently proposed as parameters to understand weav…
The quantum mechanics/molecular mechanics ONIOM calculations have been performed to study the structure and metal-ion binding properties of all-trans cyclo[1R-3S-gamma-Acc-Gly]3 hexapeptide nanotube (TAG)3PNT. The intersubunit distances and tube angle of (TAG)3PNT exhibited the sturdy nature of (TAG)3 stacks upon Li+…