Materials Literature
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Space charge results under DC-voltages have been used to compare samples taken from peelings of cables AC-aged under different specified thermal and electrical conditions with unaged and service-aged specimens. The aim is to identify quantities that have been altered during ageing. All samples were thermally treated t…
Partial discharge (PD) on-line monitoring and diagnosis is an important tool to assess the condition of power equipment. Different PD sources have different effects on the insulation performance of power apparatus. Therefore, identification of PD sources is of interest to both the power equipment manufacturers and uti…
The three-dimensional structure of Rv2607, a putative pyridoxine 5'-phosphate oxidase (PNPOx) from Mycobacterium tuberculosis, has been determined by X-ray crystallography to 2.5 A resolution. Rv2607 has a core domain similar to known PNPOx structures with a flavin mononucleotide (FMN) cofactor. Electron density for t…
We develop the characterization of the dynamics at the noise-perturbed edge of chaos in logistic maps in terms of the quantities normally used to describe glassy properties in structural glass formers. Following the recognition [Phys. Lett. A 328, 467 (2004)] that the dynamics at this critical attractor exhibits analo…
A 64-kHz sandwich transducer employing a tube-shaped Terfenol-D/epoxy pseudo 1-3 magnetostrictive composite with 0.61 Terfenol-D volume fraction was developed to alleviate the intrinsic eddy-current losses in magnetostrictive alloy-based transducers. The transducer was designed to operate as a half-wave, longitudinal,…
Abstract Summary: A comparative study of the effects of alkali metal ions Li + , Na + , K + , Rb + , and Cs + on the liquid crystalline organization of high‐molecular‐weight calf thymus DNA using polarized light microscopy was performed. Major differences in the behavior of Li + as compared to the other ions were foun…
The use of organically chelated lanthanides in diagnosis and treatment is a rapidly growing field in medicine. In order to gain a deeper understanding into the properties of these chelates, particularly spectroscopic, density-functional calculations have been performed on a series of lanthanide ions chelated with 1,4,…
This paper deals with an investigation of the relationship between partial discharge (PD) activity and aging of PWM-controlled motors. Online and offline PD measurements were carried out with the purpose of evaluating PD inception voltage, amplitude and repetition rate on motors aged by different electrical stresses.…
We present a detailed study of the Nernst effect ${S}_{zx}$ in ${(\mathrm{TMTSF})}_{2}\mathrm{P}{\mathrm{F}}_{6}$ as a function of temperature, magnetic field magnitude, direction, and pressure. As previously reported there is a large resonantlike structure as the magnetic field is rotated through crystallographic dir…
A thermally stable modulator using a novel Diels-Alder crosslinkable electrooptic (EO) polymer was fabricated. This new material system presents a smartly controlled process to overcome the EO coefficient-thermal stability tradeoff of conventional thermosetting EO polymers and obtains poling efficiency and thermal sta…
This paper presents the electrical insulation properties of a newly-developed composite material comprising a nano- and micro-filler mixture. The filler mixture composite was made by dispersing layered silicate fillers and silica fillers in epoxy resin. The filler mixture composite had the same low thermal expansion a…
Multi-air voids space-charge electrets have been developed using two fluorethylenepropylene (Teflon-FEP) films. In this work, a new technique developed to assembler these films allows the control of the thickness and shapes of multi-air voids distributed on their surface. When an impulse voltage process charges these…
A new method for fabricating methylsilsesquioxane (MSQ) materials with similar chemical composition yet easily tailored pore morphology is described. MSQ materials were formed using an acid/base two-step processing method (B2). By varying the duration of the initial acidic step, it is possible to control the size and…
Optically active photochromic copolymers of different composition, deriving from the conformationally rigid chiral monomer ( S )-3-methacryloyloxy-1-(4‘-nitro-4-azobenzene)pyrrolidine [( S )-MAP-N] and the isosteric and isopolar methacrylic ester of the flexible achiral chromophore 4‘-[(2-hydroxyethyl)ethylamino]-4-ni…
The quantity of available wheat gluten exceeds the current food use markets. Thermoforming is an alternative technical means for transforming wheat gluten. Thermoforming was applied here to wheat gluten under chemically reductive conditions to form pliable, translucent sheets. A wide variety of conditions, i.e., tempe…
During the manufacture of cross-linked polyethylene cables the insulation material experiences temperature protocols which vary with the radial position. The time-temperature scheme has, however, a major influence on microstructure of the insulation and chemical composition of the peroxide by-products. Thus it could b…
During coherent X-ray diffraction measurements on crystals of ferritin at room temperature using monochromatic undulator radiation from the Advanced Photon Source, a sudden lattice contraction was observed following a characteristic latent period and ultimately leading to the collapse of the crystal. The progression o…
Mossa et al. [Phys. Rev. E 65, 041205 (2002)] have calculated the total and configurational entropies of supercooled ortho-terphenyl liquid using the potential-energy landscape formalism and a simplified model of the intermolecular potential. I show here that the agreement of their calculated configurational entropy w…
This paper reapproaches the very classic problem of the analytic study of nonlinear diffusion of electromagnetic fields in conducting media. Significant contributions that appeared in the literature on this topic are cited in order to highlight the interest and the efforts provided by the scientific community on this…
In this study, the adsorbents Cu+-3SiPPH723 and Cu2+-3SiPPH723 were prepared starting from a silica-expanded zirconium phosphate heterostructure, 3SiPPH(0.2), which was subjected to an ion exchange with Cu(I) and Cu(II). These materials were characterized using powder X-ray diffraction, X-ray photoelectron spectroscop…