Materials Literature
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La vurroite, de composition ideale Pb 2 0 Sn 2 (Bi,As) 2 2 S 5 4 Cl 6 , est une nouvelle espece minerale du gisement epithermal contemporain a Pb-Bi du cratere de La Fossa, ile de Vulcano, en Italie. Elle se presente en encroutements volcaniques deposes par des fumeroles de haute temperature (400-600°C), situees en bo…
Small defects in SF/sub 6/ gas-insulated substations like fixed particles (fixed to conductors or on spacer surfaces) or free moving particles can influence the insulation strength of the insulation system. To determine the risk of such defects on the insulation strength, identification of the PD source is one of the…
This paper discusses practical experiences in the Netherlands with insulation condition assessment of distribution power cable networks by partial discharge diagnosis and database support. In particular, practical steps are discussed in collecting, analysing and processing the diagnostic data for decision support of u…
High-pressure Raman scattering and x-ray diffraction of lead zinc niobate-lead titanate $(\mathrm{PZN}\text{\ensuremath{-}}4%\mathrm{PT})$ solid solution were measured from ambient pressure to $13\phantom{\rule{0.3em}{0ex}}\mathrm{GPa}$. All of the Raman peaks are broad due to the disorder of ${\mathrm{Zn}}^{2+}$ and…
Aurivillius-type structure compounds are considered good candidates for piezoelectric materials at high temperature, due to their high ferro-paraelectric phase transition temperature. Despite this fact, very few papers have been published on the study of piezoelectric properties at the expected working temperatures. A…
We have successfully developed a spherical aberration (Cs)-corrected electron microscope for probe- and image-forming systems using hexapole correctors. The performance of the microscope has been evaluated experimentally. The point resolution attained using the image-forming Cs-corrector is better than 0.12 nm. For sc…
Supramolecular liquid crystalline complexes were obtained from binary mixtures of 3‐(4‐pyridyl)‐5‐(4‐n‐alkoxy)phenyl‐1,2,4‐oxadiazoles and 2,5‐thiophene dicarboxylic acid. Although the oxadiazole derivatives and the dicarboxylic acid are non‐mesomorphic, the H‐bonded complexes exhibit mesomorphism. Their liquid crysta…
In this paper, a systematic methodology is proposed for the full-wave time-domain analysis of planar loaded transmission-line (TL)-based negative-refractive-index (NRI) media. Lumped inductors and capacitors are incorporated in a finite-difference time-domain (FDTD) mesh via an "extended FDTD" approach, combining Maxw…
Ferroelectric (Na 0.52 K 0.44 Li 0.04 )(Nb 0.84 Ta 0.10 Sb 0.06 )O 3 thin films were epitaxially grown on a (100)SrRuO 3 ∥(100)SrTiO 3 substrate by pulsed laser deposition. Crystallographic analysis of the film was performed using conventional X-ray diffraction analysis and rocking curve measurements. High resolution…
We describe titanite with unusually high contents of Na, Nb, and Zr from a hydrothermal natrolite-rich vein cutting kalsilite‐ nepheline syenite at Mount Rasvumchorr, Khibina peralkaline complex, in the Kola Alkaline Province, Russia. This titanite is associated with astrophyllite, ceriobetafite, yttrobetafite, henrym…
On line partial discharge (PD) measurements provide information on the dielectric integrity of the high voltage insulation of oil insulated power transformers during service. These PD measurements are performed using a broadband antenna on an oil valve and UHF detection of PD signals. The sensitivity of this new detec…
We present two novel techniques for modeling two- and three-dimensional metamaterials with negative refractive index by transmission-line matrix (TLM) networks. The TLM networks are numerical models of reactively loaded periodic networks that support backward waves and constitute artificial media with negative refract…
This research investigated the galvanic corrosion of the magnesium alloy AZ91D coupled to steel. The galvanic current distribution was measured in 5% NaCl solution, corrosive water and an auto coolant. The experimental measurements were compared with predictions from a Boundary Element Method (BEM) model. The boundary…
Cycloheximide, a protein synthesis inhibitor, was encapsulated in cross-linked gelatin nanoparticles (Type B, Bovine skin, 75 Bloom) of 168 nm diameter with 26% entrapment efficiency. In-vitro release kinetics of the drug from the nanoparticles was done in phosphate buffer saline (PBS) at pH 7.4 and pH 5.8. The releas…
[reaction: see text] Here we describe a miniature protein (1) that presents the cAMP-dependent protein kinase (PKA) recognition epitope found within the heat-stable Protein Kinase Inhibitor protein (PKI) and a miniature protein conjugate (1-K252a) in which 1 is joined covalently to the high-affinity but nonselective k…
Molecular dynamics simulations of polyelectrolytes grafted to two apposing surfaces were performed. Bead-spring polymer models are used to treat flexible chains [e.g., sodium poly(styrene sulfonate)] and stiff chains (double-stranded DNA). The counterions are explicitly treated. The effect of the surface density of th…
The anisotropic superconductivity and the density wave have been investigated by applying the Kadanoff-Wilson renormalization group technique to the quasi-one-dimensional system with finite-range interactions. It is found that a temperature (T) dependence of response functions is proportional to exp(1/T) in a wide reg…
Phase-change random access memory is considered a potential challenger for conventional memories, such as dynamic random access memory and flash memory due to its numerous advantages. Nevertheless, high reset current is the ultimate problem in developing high-density phase-change random access memory (PRAM). We focus…
In the present paper, we use molecular dynamics simulations to quantify the response of a finite size polarizable nanotube to the electric field created by a water environment. This response is calculated in a self-consistent way at each step of the simulation, leading to the evaluation of the energy and forces coming…
In the ocean, natural and artificial processes generate clouds of bubbles that scatter and attenuate sound. Measurements have shown that at the individual bubble resonance frequency, sound propagation in this medium is highly attenuated and dispersive. The existing theory to explain this behavior is deemed adequate aw…