Materials Literature
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We use the maximally-localized Wannier function method to study bonding properties in amorphous silicon. This study represents, to our knowledge, the first application of the Wannier-function analysis to a disordered system. Our results show that, in the presence of disorder, this method is extremely helpful in provid…
The class of second-order curvilinear gratings consists of all the curvilinear gratings that are obtained by second-order spatial transformations of periodic gratings. It includes, for example, circular, elliptic, and hyperbolic gratings as well as circular, elliptic, and hyperbolic zone plates. Such structures occur…
Abstract The anticipated size of the world airliner market over the period 1997-2016, and the resultant requirements for aluminium plate and extrusions to satisfy potential Airbus wing box production is reviewed. The ‘value’ of technology and the threat posed by polymer composites to the future of aluminium alloys for…
Time-dependent chemical compositions for 13N and 15O induced in the air atmosphere of a high energy electron accelerator room have been studied using a computer simulation method. A radiation chemistry model was developed to describe the chemical reactions of 13N and 15O species with the air molecules and their radiol…
The complementary allocated pit address (CAPA) signal in a digital versatile rewritable disc (DVD-RAM) is susceptible to an objective lens radial shift; the reduction of its signal amplitude occurs and the S/N ratio decreases. To alleviate this situation, we propose a new readout signal processing scheme, the center s…
A core-shell microstructure is adopted to account for the unique resistivity-temperature (ρ– T ) behavior of (Pb 0.6 Sr 0.4 )TiO 3 materials prepared by the rapid thermal sintering (RTS) process. Instead of a V–shaped temperature coefficient of resistivity (VTCR) with critical temperature ( T ′ c1 ) at around 220°C, c…
Right- and left-handed polymer-dispersed cholesteric (chiral nematic) liquid-crystal (PDCLC) layers are stacked directly between a pair of substrates. Each layer in a device containing these stacked layers exhibits independent characteristics. This is because the PDCLC structure confines the liquid crystal (LC) within…
2nd update of database ICSD in 1998, CSD
Temperature rises of various oils were measured in both impact tests and quasi-adiabatic compression tests. A steel ball impacted against an oiled sapphire glass in the impact test. It was found that the maximum temperature rise was 45 °C in impact tests. A close relationship between temperature rise and α a max was f…
The results of studies of the effect of thermal annealing on the magnetic properties of thin films of Co-Pd alloys are described, along with a method for obtaining easy-axis perpendicular anisotropy in these materials. The method consists of depositing layers of the alloy on a substrate whose thermal expansion coeffic…
Zirconium nitride (ZrN) coatings have been deposited on polished steel substrates by a plasma-beam sputtering technique in a Sputron apparatus (Balzers A. G.) at 200 °C. A thin intermediate layer of Zr (0.08 μm) was deposited between the substrate and the 2.8 μm thick ZrN coating. The average roughness, Ra, of the sub…
An imidazolate bridged dinuclear nickel(II) complex, μ-(Im)-[(232-tet)Ni]2(ClO4)3, where 232-tet = N, N′-bis(2-aminoethyl)-l, 3-propanediamine, Im = imidazolate anion, has been synthesized and its crystal structure determined. Crystals are monoclinic, space group C2, with a = 11.982(4), b = 12.320(2), c = 11.711(4) Å,…
Titanium nitride (TiN) coatings have been deposited on polished steel substrates by a plasma-beam sputtering technique in a Sputron apparatus (Balzers A. G.) at 200 °C. A thin intermediate layer of Ti (0.08 μm) was deposited between the substrate and the 2.8 μm thick TiN coating. The average roughness, Ra, of the subs…
High speed steel is a very difficult materialfor shape casting owing to the formation of eutectic carbide networks during its solidification. These networks cause the steel to be brittle which is detrimental to the mechanical properties of tools manufactured from the material. In the present research, the effect of re…
The stress relaxation behavior of polyurethane elastomer and short polyester fiber filled elastomer composites with and without bonding agents at different strain levels and strain rates was studied. It was found that these compounds exhibit a multistage relaxation mechanism and that the rate of relaxation and cross-o…
Silica waste fume is a byproduct produced in the manufacture of ferrosilicon. The sample, which was very fine and rich in silica, was characterized using chemical and spectrophotometric measurements (XRD and electron microscope). The silica fume was incorporated in anticorrosive paint formulations based on alkyd resin…
In the previous paper [2], we studied the effect of a hybrid tail on the S*c phase range of a three-ring core mesogen. It is concluded that the ether tail has a small number of contorted, but energetically favored conformers. The hybrid tail has a slightly contorted minimum energy conformation but the fluorine substit…
Measurement of the room temperature Trp triplet state lifetime in proteins by time-resolved phosphorescence can provide valuable information on the structure and dynamics of proteins in solution. Our time-resolved absorption measurements on the long-lived states resulting from electronic excitation of the chromophore…
Abstract The hydrothermal synthesis of Mg-beidellite in which limited amounts of Ga and Cr are clearly shown to be incorporated into nonexchangeable positions in the clay layer framework is reported for the first time. Elemental analyses indicate that, up to at least 15 mole percent, Ga can replace Al virtually comple…
115 mm shaped charges were fired at a constant built-in standoffs of 3 caliber against on both sides with steel plate covered glass targets from 0° to 60° NATO angles. The residual jet tip velocities and the disturbed jet regions have been analyzed from double flash X-ray pictures of the residual jet behind the target…