Dielectric properties are evaluated by means of molecular dynamics simulations on two model systems made up of dipolar molecules. One of them mimics methanol, whereas the other differs from the former only in the ability to form hydrogen bonds. Static dielectric properties such as the permittivity and the Kirkwood factor are evaluated, and results are analyzed by considering the distribution of...

The changes of the phase composition of iron oxide samples prepared by solgel method using single precursor both for nanoparticles and the matrix were studied by x-ray diffraction. Obtained data were analyzed by an approach using the Debye formula which is suitable for the size of particles up to about 10 nm. The phase composition of the nanoparticles was described by a core-shell model corresp...

A versatile double Langmuir probe technique has been developed by incorporating analytical fits to Laframboise's numerical results for ion current collection by biased electrodes of various sizes relative to the local electron Debye length. Application of these fits to the double probe circuit has produced a set of coupled equations that express the potential of each electrode relative to the p...

A new alternative approach has been suggested for evaluating the heat capacities of stannous selenide (SnSe), based on Einstein-Debye approximation. It is well known thermal behavior solids a very important theoretical problem that explored thoroughly with development Einstein, Debye and recently developed approximations. Many additional thermophysical characteristics materials may be analyzed ...

We present an accurate and efficient technique for calculating thermal X-ray absorption fine structure (XAFS) Debye-Waller factors (DWFs) applicable to crystalline materials. Using Density Functional Theory on a 3 3 3 × × supercell pattern of MnO structure, under the nonlocal hybrid B3LYP functional paired with Gaussian local basis sets, we obtain the normal mode eigenfrequencies and eigenvecto...

In the microwave heating process, uneven temperature distribution is not conducive to improving quality characteristics of media. This article proposes a model-dependent average dwell time (MDADT) switching control method for Debye medium during heating. First, mathematical model established. Next, according model, sufficient and necessary conditions Lyapunov stability in MDADT process are give...

The form of the De bye-Waller factor in EXAFS is discussed in detail, and an expression is obtained for this factor in a general three-atom system of Cs symmetry. The normal modes which contribute to the De bye-Waller factors for each scattering path are dependent on the symmetry of the system. A series of model three-atom systems with C 2" symmetry are studied and the DebyeWaller factors as a ...

Synchrotron radiation X-ray diffraction (XRD) patterns from an extensively ball-milled iron alloy powder were collected at 100, 200 and 300 K. The results were analysed together with those using extended X-ray absorption fine structure, measured on the same sample at liquid nitrogen temperature (77 K) and at room temperature (300 K), to assess the contribution of static disorder to the Debye-Wa...

Abstract In this article, we have investigated the peristaltic transport of electro-osmotic flow Jeffrey fluid in an asymmetric channel, which walls are modulated by array patches. presence Electrical Debye Layer (EDL), Poisson Boltzmann equation for electrical potential within micro channel is considered. To evaluate potential, Debye-Huckel linearization employed governing equations modeled an...

The Debye-Waller factor and the mean-squared displacement from lattice sites for solid 3He and 4He were calculated with Path Integral Monte Carlo at temperatures between 5 K and 35 K, and densities between 38 nm−3 and 67 nm−3. It was found that the mean-squared displacement exhibits finite-size scaling consistent with a crossover between the quantum and classical limits of N−2/3 and N−1/3, resp...