We have investigated the local luminescence properties of Eu-doped CaAlSiN3 by using low-energy electron beam (e-beam) techniques. The particles yield broad emission centered at 655 nm with a shoulder at higher wavelength under light excitation, and a broad band around 643 nm with a tail at 540 nm under e-beam excitation. Using cathodoluminescence (CL) in a scanning electron microscope (SEM), w...

Experimental data exhibiting multiple-quantum excitation of the vibrational modes of decoupled, oscillating adsorbates on a surface via impact by a He atom are reviewed for the cases of carbon monoxide and heavy rare gases adsorbed on metal substrates. The experimental scattering spectra are analysed using a dynamical scattering model that predicts correctly the angular dependences of the distr...

Fluorescence diagnostic techniques are notable amongst many other optical methods because they offer high sensitivity and noninvasive measurement of tissue properties. However, a combination of multiple scattering and physical heterogeneity of biological tissues hampers interpretation of the fluorescence measurements. Analyses of the spatial distribution of endogenous and exogenous fluorophores...

A mathematical model of a mutual inductance magnetic fluid inclination sensor is established. The sensing element the fluid. composite core suspended in increases permeability medium winding. total induction intensity B winding composed two parts: excitation Bl and additional Ba generated by magnetization pure iron. sensitivity S its influencing factors are derived. output characteristics analy...

To derive spectro-temporal vocal source features complementary to the conventional spectral-based vocal tract features in improving the performance and reliability of a speaker recognition system, the excitation related modulation properties are studied. Through multi-band demodulation method, sourcerelated amplitude and phase quantities are parameterized into feature vectors. Evaluation of the...

The first three moments of the interspike interval are determined for Poisson excitation of a neuron with exponentially decaying membrane potential and a fixed threshold for action potentials. Analytic calculations are presented for the first and second moments for small threshold to EPSP ratios and a wide range of input frequencies. The coefficient of variation plotted against mean interval re...

We study the spatial distribution of minority carriers arising from their anomalous photon-assisted diffusion upon photo-excitation at an edge of n-InP slab for temperatures ranging from 300K to 78K. The experiment provides a realization of the “Lévy flight” random walk of holes, in which the Lévy distribution index γ is controlled by the temperature. We show that the variation γ(T ) is close t...

The statistical modeling of multivariate count data observed on a space–time lattice has generally focused using hierarchical approach where correlation structure is placed continuous, latent, process. distribution then assumed to be conditionally independent given the latent However, in many real-world applications, especially criminal or terrorism data, conditional independence between distri...

An accurate theory describing adiabatic following of the dark, nonabsorbing state in the three-level system is developed. An analytical solution for the wave function of the particle experiencing Raman excitation is found as an expansion in terms of the time varying nonadiabatic perturbation parameter. The solution can be presented as a sum of adiabatic and nonadiabatic parts. Both are estimate...

Using measurements of Mg  609.78 and 624.94 Å lines from the Coronal Diagnostic Spectrometer (CDS) on board SOHO, we seek to examine the variation of line width and line ratio in regions far off-limb at the Northern pole of the Sun. It is found that above ≈1150′′ the ratio of the two coronal Mg  resonance lines reduces to values that might be expected for a more radiatively dominant excitatio...