Materials Literature
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A discrete-component approach was taken to establish the operational feasibility of a novel, imaging, midinfrared, multispectral, polarimetric sensor for remote-sensing application. The sensor is designed to exploit the spectral and polarimetric characteristics of the scene as discriminants. Pixelated multispectral fi…
Covers advancements in spacecraft and tactical and strategic missile systems, including subsystem design and application, mission design and analysis, materials and structures, developments in space sciences, space processing and manufacturing, space operations, and applications of space technologies to other fields.
Abstract The physical and chemical properties for a series of structurally well‐defined, alkylated naphthalenes have been compared. Structural characteristics, such as the alkyl chain length, alkyl chain branching, and number of alkyl groups on the naphthalene ring, have been correlated with physical properties, such…
The products of crystallization of 4-hydroxybenzaldehyde-4-nitrophenylhydrazone ( I ) and N ′-(2-phenyl-1 H -indole-3-aldehyde)-4-nitrophenylhydrazone ( II ) from different solvents are studied by X-ray diffraction with the aim of examining the polymorphism of hydrazone derivatives. The structural features of the crys…
The acid–base determination of different substances by nonaqueous titrations is highly preferred in pharmaceutical analyses since the method is quantitative, exact, and reproducible. The modern interpretation of the reactions in nonaqueous solvents started in the last century, but several inconsistencies and unsolved…
A broad bulk-quasicrystal-forming region, (Ti x Zr100− x )100− y Ni y (43.75 ≤⃒ x ≤⃒ 81.25, 17 ≤⃒ y ≤⃒ 23), has been identified in the Ti-Zr-Ni system, and quasicrystals can be obtained by using a conventional suction-casting method. The quasilattice constant of the icosahedral (i) phase is within the range 0.505-0.53…
Recent technological advances in thermal analysis present educational opportunities. In particular, modulated differential scanning calorimetry (MDSC) can be used to contrast reversing and nonreversing processes in practical laboratory experiments. The introduction of these concepts elucidates the relationship between…
The mechanisms of crack nucleation and propagation of the lamellar microstructures found in pearlite were studied by in situ transmission electron microscopy. It was found that, in addition to the predominant mechanism of cleavage fracture in the cementite plates, ductile fracture of the cementite plates is another cr…
V 2 O 5 thin films were prepared by reactive rf sputtering and used in the application as electrodes in rechargeable battery with Li as a counterelectrode. The V2O5 films were deposited onto uncoated and SnO2 coated glass by sputtering a V cathode using Ar+O2 gas mixtures. The structural properties of the V2O5 films w…
This work deals in the first part, with the synthesis and characterization of a new-type carbonific. Two steps were used in the synthesis of the carbonific. Meanwhile, the structure was characterized by Fourier transform infrared spectroscopy (FTIR), magic-angle spinning nuclear magnetic resonance (MAS-NMR) 13 C spect…
Indium tin oxide (ITO) films prepared by dc magnetron sputtering were annealed in air, vacuum, and oxygen gas atmospheres. The electrical properties and internal stresses of these annealed ITO films were systematically investigated. It was found that, among the above postannealing treatments, oxygen gas annealing sign…
A critical characteristic of nanoparticles and, in general, of nanomaterials, is the overweighing importance of the surface and interface layers relative to the bulk because of the small size of the aggregates (in three dimensions) or thickness of the layers (in the case of two dimensions) that constitute the nanomate…
Protein folding is determined by molecular features in the unfolded state, as well as the native folded structure. In the unfolded state, imino acids both restrict conformational space and present cis-trans isomerization barriers to folding. Because of its high proline and hydroxyproline content, the collagen triple-h…
Abstract OCTA (Open Computational Tool for Advanced material technology) is an integrated simulation system for polymeric materials developed by a joint project of industry and academia supported by Japanese government. It aims at exploring the utility of mesoscale modelings developed in polymer science. OCTA consists…
Abstract Polypyrrole films were electrochemically synthesized by direct oxidative polymerization of pyrrole in acetonitrile containing β‐naphthalene sulfonic acid or tetrabutylammonium tetrafluoroborate as an supporting electrolyte. We characterized the as‐grown polypyrrole films by resonance Raman spectroscopy in the…
Vertically aligned bamboo-like carbon nanotubes (CNTs) are successfully synthesized on Ni-coated Si (Ni/Si) substrates by hot-filament-assisted radio frequency (rf) magnetron sputtering. Transmission electron microscopy analysis reveals that a bamboo-like structure is formed inside the nanotube that has a catalytic Ni…
This paper compares the hairiness of Solospun yarns with conventional ring spun worsted yams of the same specifications. A 24-spindles worsted ring spinning frame is used to spin the Solospun and conventional ring spun yarns at the same time, and yarn hairiness is measured. The total hairiness number ( T p ), the numb…
After being thrown onto a solid substrate, very soft spherical gels bounce repeatedly. Separate rheological measurements suggest that these balls can be treated as nearly elastic. The Hertz contact deformation expected in the static (elastic) limit was observed only at very small impact velocities. For larger velociti…
The preparation by magnetron sputtering of p-type semiconducting thin films consisting of a multicomponent oxide composed of Cu oxide and Co oxide is described. The electrical, optical, and crystallographical properties of films deposited by rf magnetron sputtering using (Cu2O)1−x–(CoO)x powder targets were strongly d…
This theoretical work describes pores between fibers in general fiber assemblies. The basic idea is to treat the pores between fibers—under certain assumptions—as air fibers surrounded by fictional borders. Different pore characteristics are formulated from basic definitions of fiber assemblies. It is possible to find…