Materials Literature
按标题、摘要、年份、主题和来源检索公开元数据。结果保留作者、摘要、分类与原始来源链接。
The thermal conductivity between 12 and 300 K is reported for graphite fibers carbonized from a variety of precursors, including spun polyacrylonitrile, petroleum pitch, or grown by chemical vapor deposition of methane. The fibers were studied as grown as well as heat treated to temperatures up to 3000 \ifmmode^\circ\…
The electronic structure of surface defects on NiO(100) and their interaction with ${\mathrm{O}}_{2}$ and ${\mathrm{H}}_{2}$O have been studied on single crystals cleaved in ultrahigh vacuum by using ultraviolet and x-ray photoemission and Auger spectroscopies, as well as low-energy-electron diffraction. Defects creat…
The idea that the ratio E/D ≡ λ can be confined by a proper choice of the axis system to the range (0,±1/3) serves as a basis for the standardization of the spin Hamiltonian and the ligand field Hamiltonian for orthorhombic symmetry. Due to recent results on the transformation of the Stevens operators Oqk, relations a…
Beer foam is reviewed in terms of the physical principles which underly it, its measurement and the components of beer which affects its formation and stability. The influence of processing conditions on foam production, retention and cling are detailed.)
The importance of three-dimensional effects in the electronic structure of the quasi two-dimensional layered crystal $1T$-Ti${\mathrm{Se}}_{2}$ is demonstrated by means of high-resolution angle-resolved photoemission excited by synchrotron radiation. By resolving the spin-orbit splitting of the upper Se-$4p$ valence b…
$\mathrm{EL}2$ is a technologically important deep level in GaAs whose identification has been the subject of intense study. In this paper we present uniaxial stress and magnetic field experiments which establish for the first time that $\mathrm{EL}2$ has tetrahedral symmetry and is, therefore, an isolated point defec…
The electrostatic interaction between charged, colloidal particles trapped at an air-water interface is considered using linearised Poisson-Boltzmann results for point particles. In addition to the expected screened-Coulomb contribution, which decays exponentially, an algebraic dipole-dipole interaction occurs that ma…
New and more accurate energy profiles for interstitial muonium in diamond clusters (${\mathrm{C}}_{10}$${\mathrm{H}}_{16}$ to ${\mathrm{C}}_{30}$${\mathrm{H}}_{40}$) have been determined by ab initio and approximate ab initio calculations, and have been critically compared to previous theoretical work. The energy prof…
Under perpendicular magnetic field, the spin susceptibility of a noninteracting two-dimensional electron gas with open Fermi surface shows a novel behavior due to the orbital effect. It exhibits a series of peaks at wave vectors which obey a quantized nesting condition. When the field increases, each of these peaks be…
For the first time a nonadiabatic (all-particle) calculation has been carried out for the electric polarizabilities and hyperpolarizabilities of ${\mathrm{H}}_{2}^{+}$, H${\mathrm{D}}^{+}$, and ${\mathrm{D}}_{2}^{+}$ in their lowest rovibronic states. The value of the hyperpolarizability $\ensuremath{\gamma}$ is drama…
Kinetic models described by systems of linear differential equations can be fitted to data quickly and easily by taking advantage of the special properties of such systems. The estimation situation can be greatly improved when multiresponse data are available, since one can then automatically determine starting values…
Improvements in the correlation of radiation-induced change in yield strength in AISI Type 316 stainless steel with microstructure were made by re-examining the role of short-range obstacles. Effects due to the size of the obstacles relative to their spacing and shape of the obstacles were applied. In addition, the co…
A comparison is made of tensile and abrasive properties and weaving performance of polyester/cotton yams sized with polyvinyl alcohol with and without wax in the size formulation. Waxy lubricants are usually present in size formulations for spun yams. Wax enhances size application by reducing the tendency of the size…
ABSTRACT Insoluble collagen (bovine Achilles tendon), gelatin and meat were each mixed with whole egg protein (about 50% of the nitrogen) and fed to rats. True digestibility was evaluated after inhibiting gastric acid secretion with omeprazole. Insoluble collagen, supplemented with small amounts of essential amino aci…
Additional information of various kinds on the structure, such as 'atomicity', noncrystallographic symmetry, known molecular boundaries, nonnegativity of the electron density and so forth, may be described by an equation ρ = τ[ρ] or by the corresponding system of equations for structure factors. To use this informatio…
Expressions are obtained for the exchange relaxation terms in the equations of motion for the magnetization and antiferromagnetism vectors in antiferromagnets and ferrites. The dissipative function is found. It is shown that from the general equations of motion for antiferromagnets in the dissipation-free approximatio…
Abstract Viscoelastic data from dynamic measurements show that modifying resins produce complex changes in the properties of styrenic block copolymers. These property changes are generally consistent with compatibility concepts. Resins which are compatible with the midblock of these polymers, Resins AL-1, Al-2, and RE…
Because the greatly reduced lattice constants of Ce2Fe14B lead to nonmagnetic behavior, partial substitution of La for Ce, thereby expanding the lattice constant, may result in magnetic properties. (La1-xCex)2Fe14B powder samples with x ranging from 0 to 1 were prepared, and the magnetic properties and latttice consta…
Abstract The theory of phase separation and microdomain formation in block copolymer‐homopolymer blends is reviewed. The calculations involve the solution of modified mean field diffusion equations for the polymer distribution functions, which are used to construct a general free energy expression, taking into account…
(1985). The Flexural Rigidity of Polyester-fibre–Cotton Yarns Produced on the Ring-, Rotor-, and Friction-spinning Systems. The Journal of The Textile Institute: Vol. 76, No. 6, pp. 454-458.