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Magnetic Ceramics

R. Valenzuela1994-09-15OpenAlex

Magnetic Ceramics describes the structure, preparation techniques, magnetic properties and applications of iron-based oxides also known as ferrites; metallic magnetic materials are also covered in depth. The main purpose of the book is to provide an up-to-date overview of the relevant aspects of ferrites, which cover…

Magnetic Properties and Synthesis of Ferrites

Applications of Engel and Vosko’s generalized gradient approximation in solids

Philipp Dufek、Peter Blaha、Karlheinz Schwarz1994-09-15OpenAlex

Recently, Engel and Vosko have proposed an alternative form of a generalized gradient approximation (GGA) [Phys. Rev. B 47, 13 164 (1993)] within density-functional theory. This version of the GGA (EV93) was obtained by optimizing the exchange-correlation potential ${\mathit{V}}_{\mathrm{xc}}$ instead of the correspon…

Physics of Superconductivity and MagnetismMagnetic and transport properties of perovskites and related materialsAdvanced Condensed Matter Physics

Raman ‘‘fingerprinting’’ of amorphous carbon films

M. A. Tamor、W. C. Vassell1994-09-15OpenAlex

We compare the Raman spectra and other macroscopic properties of nearly one hundred amorphous carbon films deposited at five research laboratories by a total of five different methods in search of correlations useful for both process control and basic understanding of the structure of these materials. For the full ran…

High-pressure geophysics and materialsDiamond and Carbon-based Materials ResearchGlass properties and applications

Coulomb final state interaction in cascade Auger processes

S A Sheĭnerman1994-09-14Journal of Physics B Atomic Molecular and Optical Physics

A post-collision interaction (PCI) in the cascade Auger processes is considered. The general analytical formulae for an amplitude and a cross section of the process under consideration are obtained. These formulae allow for the PCI distortion and are valid for a wide range of velocities of the emitted electrons except…

Advanced Chemical Physics StudiesAtomic and Molecular PhysicsElectron and X-Ray Spectroscopy Techniques

A diagnostic study of the field emission characteristics of individual micro-emitters in CVD diamond films

Ning Xu、Yonhua Tzeng、R V Latham1994-09-14Journal of Physics D Applied Physics

Details are given of an experimental study of the characteristics of field-induced electron emission from 15 mm diameter CVD diamond films deposited on an Mo substrate. Three dedicated techniques have been used to characterize the electron emission process: (i) the 'transparent anode imaging' technique for recording t…

Semiconductor materials and devicesDiamond and Carbon-based Materials ResearchForce Microscopy Techniques and Applications

Radiation Losses Representation in the Transmission Line Theory (TLT)

D. O. Wendt、J. L. ter Haseborg1994-09-13OpenAlex

A lot of publications deal with various types of transmission lines illuminated by electromagnetic fields. These fields cause additional currents and/or voltages on the line. Here the kind of the transmission line is not of interest. A shielded or unbraided cable can be considered. In contrast with this a lack of atte…

Graphite, nuclear technology, radiation studies

Photolabile precursors of glutamate: synthesis, photochemical properties, and activation of glutamate receptors on a microsecond time scale.

Raymond Wieboldt、Katrina Gee、Lin Niu 等 6 位作者1994-09-13Proceedings of the National Academy of Sciences

Newly synthesized photolabile derivatives of glutamate, caged glutamate, that release free glutamate on a microsecond time scale after a pulse of UV laser light are described. 2-Nitrobenzyl derivatives were attached to the amino or carboxyl groups of glutamate. Substitution with a -CO2- group at the benzylic carbon ac…

Olfactory and Sensory Function StudiesPhotochromic and Fluorescence ChemistryPhotoreceptor and optogenetics research

Metalorganic chemical vapor deposition technique for growing c-axis oriented ZnO thin films in atmospheric pressure air

N. Deepak Kumar、M. N. Kamalasanan、Subhas Chandra1994-09-12Applied Physics Letters

ZnO thin films have been grown in atmospheric pressure and ambient atmospheric air using zinc 2-ethyl hexanoate as zinc source by metalorganic chemical vapor deposition technique. The films grown on glass above 350 °C showed c-axis orientation as seen from x-ray diffraction studies. The films were highly transparent a…

ZnO doping and propertiesGas Sensing Nanomaterials and SensorsCopper-based nanomaterials and applications

Carbon dioxide foaming of glassy polymers

Matthias Weßling、Zandrie Borneman、Th. van den Boomgaard 等 4 位作者1994-09-12Journal of Applied Polymer Science

Abstract The mechanism of foaming a glassy polymer using sorbed carbon dioxide is studied in detail. A glassy polymer supersaturated with nitrogen forms a microcellular foam, if the polymer is quickly heated above its glass transition temperature. A glassy polymer supersaturated with CO 2 forms this foam‐like structur…

Phase Equilibria and ThermodynamicsCarbon dioxide utilization in catalysisPolymer Foaming and Composites

Neutron Multiplicities and Yields of Correlated Zr-Ce and Mo-Ba Fragment Paris in Spontaneous Fission ofCf252

G. M. Ter–Akopian、J. H. Hamilton、Yu. Ts. Oganessian 等 22 位作者1994-09-12Physical Review Letters

High resolution $\ensuremath{\gamma}\ensuremath{-}\ensuremath{\gamma}$ and $\ensuremath{\gamma}\ensuremath{-}\ensuremath{\gamma}\ensuremath{-}\ensuremath{\gamma}$ coincidences in the spontaneous fission of $^{252}\mathrm{Cf}$ were measured. Relative yields and neutron multiplicities from zero up to 10 were extracted d…

Nuclear physics research studiesNuclear Materials and PropertiesNuclear Physics and Applications

Surface-Monolayer-Induced Bulk Alignment of Liquid Crystals

Xiaowei Zhuang、Lorenzo Marrucci、Y. R. Shen1994-09-12Physical Review Letters

Bulk liquid crystal alignment can be completely determined by the orientational distribution of the surface monolayer. The bulk pretilt angles predicted from the measured monolayer orientational distribution using the Landau-de Gennes formalism agree very well with the observed values. Surface anchoring energies can a…

Liquid Crystal Research AdvancementsSurfactants and Colloidal SystemsPlant Reproductive Biology

Thermally induced crosslinking between polyacrylic acid and epoxidized natural rubber. III. Effect of carbon black filler and mixer rotor speed

Ashis Mallick、D. K. Tripathy、S. K. De1994-09-12Journal of Applied Polymer Science

Abstract High‐temperature molding of Brabender‐mixed blend of polyacrylic acid (PAA) and epoxidized natural rubber (ENR) causes thermally induced crosslinking between PAA and ENR. Studies on Monsanto rheometry of the blend and physical properties, solvent swelling, and dynamic mechanical properties of the molded blend…

Polymer Nanocomposites and PropertiesPolymer composites and self-healingTribology and Wear Analysis

Photoluminescence of porous silicon exposed to ambient air

Toshiro Maruyama、Satoshi Ohtani1994-09-12Applied Physics Letters

The room-temperature photoluminescence and structure were studied concerning porous silicon which was exposed to ambient air. Water vapor in ambient air gradually oxidized the surface of the porous silicon with developing Si—O—Si bonds. This room-temperature oxidation progressively replaced an unstable H-passivated su…

Semiconductor materials and devicesSilicon Nanostructures and PhotoluminescenceNanowire Synthesis and Applications

Evidence that blue luminescence of oxidized porous silicon originates from SiO2

A. J. Kontkiewicz、A. M. Kontkiewicz、J. Siejka 等 11 位作者1994-09-12Applied Physics Letters

We have analyzed red and blue luminescence from porous silicon as a function of oxidation parameters and feature dimension determined with an atomic force microscope. We have found correlation between blue luminescence intensity and the increase in feature size caused by oxidation. We have further shown that blue lumi…

Semiconductor materials and devicesSilicon Nanostructures and PhotoluminescenceNanowire Synthesis and Applications

Statistical Mechanics of Continuous Random Networks: A Model Glass Transition

Paul M. Goldbart、Alfred Zippelius1994-09-10Europhysics Letters (EPL)

We present a statistical-mechanical theory of the formation of a macroscopic random network built from elementary units. These units represent atoms or small molecules that can form up to p permanent covalent bonds. As the number of formed bonds is increased, we observe a continuous phase transition from a fluid phase…

Material Dynamics and PropertiesTheoretical and Computational PhysicsComplex Systems and Time Series Analysis

Dynamics of a drop in a constricted capillary tube

T. M. Tsai、Michael J. Miksis1994-09-10Journal of Fluid Mechanics

Here we study the dynamics of a bubble or drop as it is driven by a pressure gradient through a capillary tube. For the case of a straight capillary, the drop can either approach a steady-state shape or the rear of the drop develops a re-entrant cavity. Also, depending on the initial conditions, the drop can break apa…

Surface Modification and SuperhydrophobicityFluid Dynamics and Heat TransferElectrohydrodynamics and Fluid Dynamics

Vapour-Liquid Equilibrium Data of Binary Polymer Solutions: Vapour Pressures, Henry-Constants and Segment-Molar Excess Gibbs Free Energies

Ch. Wohlfarth1994-09-09Medical Entomology and Zoology

General objectives experimental methods measures for the polymer concentration segment-molar excess Gibbs free energies how to use the data tables vapour pressures of binary polymer solutions Redlich-Kister parameters for the segment-molar excess Gibbs free energies of binary polymer solutions weight fraction Henry-co…

Phase Equilibria and ThermodynamicsProcess Optimization and IntegrationPolymer Science and PVC

<title>Review of electrochromic window performance factors</title>

Steven E. Selkowitz、M. Rubín、Eleanor S. Lee 等 4 位作者1994-09-09Proceedings of SPIE, the International Society for Optical Engineering/Proceedings of SPIE

The performance factors which will influence the market acceptance of electrochromic windows are reviewed. A set of data representing the optical properties of existing and foreseeable electrochromic window devices was generated. The issue of reflective versus absorbing electrochromics was explored. This data was used…

Transition Metal Oxide NanomaterialsColor Science and Applications

<title>Effect of switching control strategies on the energy performance of electrochromic windows</title>

R. Sullivan、Eleanor S. Lee、K. Papamichael 等 5 位作者1994-09-09Proceedings of SPIE, the International Society for Optical Engineering/Proceedings of SPIE

The paper presents the results of a study investigating the energy performance of electrochromic windows under a variety of state-switching control strategies. We used the DOE-2.1E energy simulation program to analyze the annual cooling, lighting, and total electricity use and peak demand as a function of glazing type…

Transition Metal Oxide Nanomaterials

Minimum inhibitory concentration of esters of p-hydroxybenzoic acid (paraben) combinations against toxigenic fungi.

D. P. Thompson1994-09-06Journal of Food Protection

Minimum inhibitory concentration (MIC) studies were conducted to observe synergistic, antagonistic or additive effects produced by combinations of butyl paraben, ethyl paraben, methyl paraben, and propyl paraben against mycelial growth of mycotoxigenic species of Aspergillus, Fusarium, and Penicillium. On an individua…

Nanocomposite Films for Food Packaging