Results 61 to 70 of about 535,629 (194)

Low Mach and Peclet number limit for a model of stellar tachocline and upper radiative zones

Electronic Journal of Differential Equations, 2016
We study a hydrodynamical model describing the motion of internal stellar layers based on compressible Navier-Stokes-Fourier-Poisson system. We suppose that the medium is electrically charged, we include energy exchanges through radiative transfer and
Donatella Donatelli, Bernard Ducomet, Marek Kobera, Sarka Necasova   +3 more
doaj  

Phase Retrieval in Short-Range Optical Communication Using Temporal Transport-of-Intensity Equation with Direct Detection

Photonics
Direct detection (DD) is a straightforward, cost-effective receiving scheme for medium- and short-range fiber-optic communication systems, yet directly accessing phase information presents inherent challenges. The temporal transport-of-intensity equation
Yue Liu, Jiahao Huo, Peng Qin, Xiaoying Zhang, Keping Long   +4 more
doaj   +1 more source

Direct observation of Levy flight of holes in bulk n-InP

, 2012
We study the photoluminescence spectra excited at an edge side of n-InP slabs and observed from the broadside. In a moderately doped sample the intensity drops off as a power-law function of the distance from the excitation - up to several millimeters ...
A. F. Molisch, Arsen Subashiev, E. F. Schubert, G. Rybicki, K. Seeger, L. M. Biberman, L. M. Biberman, Oleg Semyonov, P. Lévy, S. Luryi, Serge Luryi, U. Springmann, V. F. Gantmakher, V. V. Ivanov, Zhichao Chen   +14 more
core   +1 more source

NUMERICAL SIMULATION OF TOXIC CHEMICAL DISPERSION AFTER ACCIDENT AT RAILWAY

Nauka ta progres transportu, 2016
Purpose. This research focuses on the development of an applied numerical model to calculate the dynamics of atmospheric pollution in the emission of dangerous chemical substances in the event of transportation by railway. Methodology.
M. M. Biliaiev, L. Ya. Muntian
doaj   +1 more source

Super-diffusion in optical realizations of Anderson localization

, 2012
We discuss the dynamics of particles in one dimension in potentials that are random both in space and in time. The results are applied to recent optics experiments on Anderson localization, in which the transverse spreading of a beam is suppressed by ...
Kuzovkov V N, Levi L, Liad Levi, Lichtenberg A J, Michael Wilkinson, Mordechai Segev, Mott N, Ovchinnikov A A, Shmuel Fishman, Wilkinson M, Yevgeny Krivolapov, Zaslavsky G M   +11 more
core   +1 more source

Propagation and Depolarization of a Short Pulse of Light in Sea Water

Journal of Marine Science and Engineering, 2020
We present the results of a theoretical study of underwater pulse propagation. The vector radiative transfer equation (VRTE) underlies our calculations of the main characteristics of the scattered light field in the pulse.
Evgeniy E. Gorodnichev, Kirill A. Kondratiev, Alexandr I. Kuzovlev, Dmitrii B. Rogozkin   +3 more
doaj   +1 more source

Multi-filter transport of intensity equation solver with equalized noise sensitivity

Optics Express, 2015
Phase retrieval based on the Transport of Intensity Equation (TIE) has shown to be a powerful tool to obtain the phase of complex fields. Recently, it has been proven that the performance of TIE techniques can be improved when using unequally spaced measurement planes.
J, Martinez-Carranza, K, Falaggis, T, Kozacki   +2 more
openaire   +2 more sources

Derivation of a one-way radiative transfer equation in random media

, 2016
We derive from first principles a one-way radiative transfer equation for the wave intensity resolved over directions (Wigner transform of the wave field) in random media.
Borcea, Liliana, Garnier, Josselin
core   +3 more sources

Snapshot Quantitative Phase Imaging with Acousto-Optic Chromatic Aberration Control

Sensors
The transport of intensity equation enables quantitative phase imaging from only two axially displaced intensity images, facilitating the characterization of low-contrast samples like cells and microorganisms.
Christos Alexandropoulos, Laura Rodríguez-Suñé, Martí Duocastella   +2 more
doaj   +1 more source

PREDICTION OF ATMOSPHERIC AIR POLLUTION BY EMISSIONS OF MOTOR TRANSPORT TAKING INTO ACCOUNT THE CHEMICAL TRANSFORMATION OF HARMFUL SUBSTANCES

Nauka ta progres transportu, 2017
Purpose. Development of 3D numerical models, which allow us to calculate air pollution process from road transport emissions based on chemical transformation of pollutants.
M. M. Biliaiev, O. S. Slavinska, R. V. Kyrychenko   +2 more
doaj   +1 more source