Industrial High DC Voltage: 1. Fields, 2. Breakdowns, 3. Tests
This book is based on the lectures of Prof.dr.ir. F.H. Kreuger at the Delft University of Technology.
Materials Literature
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Optimal polar angles and weights for the characteristics method
In the method of characteristics as applied to two-dimensional lattice physics computations, one integrates the transport equation along three-dimensional ray paths corresponding to the discretization chosen for the angular flux {Psi}. The result of integrating through zone i, assuming constant {Sigma}{sub i} and a co…
Characterization of the roles of electrochemistry, convection and crack chemistry in stress corrosion cracking
Understanding the role of ionic current flow within a crack and near the crack tip is fundamental to modeling of environmentally assisted crack advance. Critical conceptual issues and models related to ionic current flow within cracks, and the associated ``crevice`` chemistry and metal oxidation that results, are pres…
Crystallization from Solutions
Crystallization from solutions , Crystallization from solutions , مرکز فناوری اطلاعات و اطلاع رسانی کشاورزی
Fundamentals of Adhesion and Interfaces
Preface Mechanics of particle adhesion D.S. Rimai, L.P. DeMejo and R.C. Bowen The role of adhesion in the impact of elastic spheres K.L. Johnson and H.M. Pollock Surface roughness and its influence on particle adhesion using atomic force techniques D.M. Schaefer, M. Carpenter, B. Gady, R. Reifenberger, L.P. DeMejo and…
He Scattering from Compact Clusters and from Diffusion-Limited Aggregates on Surfaces: Observable Signatures of Structure
The angular intensity distribution of He beams scattered from compact clusters and from diffusion limited aggregates, epitaxially grown on metal surfaces, is investigated theoretically. The purpose is twofold: to distinguish compact cluster structures from diffusion limited aggregates, and to find observable {\em sign…
The dry spinning of dibutyrylchitin fibers
Abstract Dibutyrylchitin was prepared by treatment of krill chitin with butyric anhydride in the presence of perchloric acid as a catalyst of reaction carried out at 25 to 30°C. Dibutyrylchitin is easily soluble in several organic solvents, such as acetone, alcohols, methylene chloride, and dimethylformamide. Samples…
Nondipolar Asymmetries of Photoelectron Angular Distributions
We have measured the nondipolar contribution to the Ar $1s$ photoelectron angular distribution over the 30--2000 eV electron-energy range. The nondipolar interaction results in a forward or backward asymmetry with respect to the photon beam. The asymmetry is directed backward near threshold, is symmetric near 230 eV,…
Observation of a negative electron affinity for boron nitride
This study reports UV-photoemission (UPS) measurements made on boron nitride crystals and thin films. The materials examined are commercial grade c-BN powder and thin films of BN deposited with ion beam assisted e-beam evaporation and laser ablation. The thin film samples examined exhibited varying amounts of sp3 (cub…
Foam Mechanics at the Bubble Scale
By focusing on entire bubbles rather than films or vertices, a simple model is proposed for the deformation and flow of foam in which dimensionality, polydispersity, and liquid content can easily be varied. Simulation results are presented for the linear elastic properties as a function of bubble volume fraction, show…
Electro-optical characteristics and switching behavior of the in-plane switching mode
Electro-optical characteristics related to the threshold behavior of liquid crystals when using the in-plane switching (IPS) mode were investigated with interdigital electrodes. In order to analyze the switching behavior of liquid crystals, an equation, which expresses the threshold transition, was derived using the c…
Fukui function from a gradient expansion formula, and estimate of hardness and covalent radius for an atom
The Fukui function for a neutral atom is expressed as its LDA approximation plus a one-parameter gradient correction, and the resultant formula is numerically tested. Expressing hardness as a density functional involving this Fukui function, global hardness values are determined for several atoms. Estimates also are m…
Linear-Response Calculation of Electron-Phonon Coupling Parameters
An ab initio method for calculating electron-phonon coupling parameters is presented. The method is an extension of the plane-wave-based linear-response method for the calculation of lattice dynamics. Results for the mass enhancement parameter and the electron-phonon spectral function for Al, Pb and Li are presented.…
Al Coordination Changes in High-Pressure Aluminosilicate Liquids
Understanding the effect of pressure on aluminosilicate glass and liquid structure is critical to understanding magma flow at depth. Aluminum coordination has been predicted by mineral phase analysis and molecular dynamic calculations to change with increasing pressure. Nuclear magnetic resonance studies of glasses qu…
Separable Dual Space Gaussian Pseudo-potentials
We present pseudo-potential coefficients for the first two rows of the periodic table. The pseudo potential is of a novel analytic form, that gives optimal efficiency in numerical calculations using plane waves as basis set. At most 7 coefficients are necessary to specify its analytic form. It is separable and has opt…
Upgrading of Raw Perlite by a DryMagnetic Technique
Perlite of composition SiO 2 73.6%, Al 2 O 3 12.4%, Fe 2 O 3 1.25%, MgO 0.15%, Na 2 O 2.99%, K 2 O 4.18%, H 2 O + 3.17%, H 2 O - 0.2%, and found to contain 89.4% of amorphous phase and 10.6% of crystalline phase, the latter consisting of feldspars, biotite, quartz, magnetite and chlorite, was studied. Due to its large…
Magnetoelectronic and Magnetostructural Coupling in the La 1 - x Ca x MnO 3 System
Phenomenological models of the "colossal magnetoresistance" manganites have emphasized a local picture for the Mn ion, and little attention has been given to the effects of Mn d -O p hybridization. We present self-consistent local spin-density electronic-structure studies that properly account for hybridization, and f…
Landau free energy, Landau entropy, phase transitions and limits of metastability in an analytical model with a variable number of degrees of freedom
In this paper the statistical mechanical properties are investigated of a simple analytical model which is based loosely on a cluster of atoms. The model has a phase transition from a solid-like to a liquid-like phase. Particular interest is paid to the dependence of the nature of this phase transition on the number o…
Wetting of the Au(110) substrate: Homoepitaxial islands and layers
The morphology of epitaxial structures formed in solidification of liquid Au films on the Au(110) surface was studied by molecular dynamics simulation based on a many--body interatomic potential. The (1x2) reconstructed and smooth phase at the temperature T=500 K, as well as a deconstructed and rough phase of the Au(1…
Continuous vapor phase polymerization of pyrrole. I. Electrically conductive composite fiber of polypyrrole with poly(p‐phenylene terephthalamide)
Abstract Electrically conductive polypyrrole (PPy)/poly( p ‐phenylene terephthalamide) (PPTA) composite fibers have been prepared by continuous vapor phase polymerization at a speed of 0.5 ∼ 1.5 m/min. The main parameters have been examined, and the conducting fibers with the best properties of electrical conductivity…