نتایج جستجو برای: anisotropic distribution

تعداد نتایج: 645592  

Journal: :Applied optics 2007
Jinjun Xia Gang Yao

We measured angular-resolved diffuse reflectance in tissue samples of different anisotropic characteristics. Experimental measurements were compared with theoretical results based on the diffusion approximation. The results indicated that the angular distribution in isotropic tissue was the same as in isotropic phantoms. Under normal incidence, the measured angular profiles of diffuse reflectan...

2001
Cris L. Luengo Hendriks Lucas J. van Vliet

Length distributions can be estimated using a class of morphological sieves constructed with a socalled Rotation-Invariant, Anisotropic (RIA) morphology. The RIA morphology can only be computed from an (intermediate) morphological orientation space, which is produced by a morphological operation with rotated versions of an anisotropic structuring element. This structuring element is defined as ...

2010
Reuven Ramaty

The intensity, spectrum and polarization of gyro-synchrotron radiation from an arbitrary distribution of electrons in a magnetoactive plasma are calculated. These calculations are based on detailed theories of gyro-synchrotron emission and absorption as well as on the equations of radiation transfer in the limit of large Faraday rotation. By performing extensive numerical calculations, for both...

2008
S. D. Maharaj

New exact interior solutions to the Einstein field equations for anisotropic spheres are found. We utilise a procedure that necessitates a choice for the energy density and the radial pressure. This class contains the constant density model of Maharaj and Maartens (Gen. Rel. Grav., 21, 899-905, 1989) and the variable density model of Gokhroo and Mehra (Gen. Rel. Grav., 26, 75-84, 1994) as speci...

2016
Sanjukta Chakraborty Subenoy Chakraborty

Gravitational collapse of cylindrical anisotropic fluid has been considered in analogy with the work of Misner and Sharp. Using Darmois matching conditions, the interior cylindrical dissipative fluid (in the form of shear viscosity and heat flux )is matched to an exterior vacuum Einstein–Rosen space-time. It is found that on the bounding 3-surface the radial pressure of the anisotropic perfect ...

1998
H. Hernández L. A. Núñez

We show that under particular circumstances a general relativistic spherically symmetric bounded distribution of matter could satisfy a nonlocal equation of state. This equation relates, at a given point, the components of the corresponding energy momentum tensor not only as function at that point, but as a functional throughout the enclosed configuration. We have found that these types of dyna...

2000
Z. Chu

Polycrystalline material microstructure is simulated by Johnson-Mehl model. Finite element analysis is implemented on unit volumes of Johnson-Mehl grain structures, which are aggregates of anisotropic grains orientated by a uniform-random distribution. Monte Carlo techniques are utilized in obtaining the statistical properties of elastic moduli of the ensemble from finite element solutions. The...

2016
M. Han H. Wu E. Luijten

Anisotropic colloidal particles constitute an important class of building blocks for self-assembly directed by electrical fields. The aggregation of these building blocks is driven by induced dipole moments, which arise from an interplay between dielectric effects and the electric double layer. For particles that are anisotropic in shape, charge distribution, and dielectric properties, calculat...

2008
Paulo Aguiar Paulo Crawford

In this work it is shown that there are some spatially homogeneous but anisotropic models (Kantowski-Sachs and Bianchi type-III), with a positive cosmological constant, for which the inhomogeneities in the distribution of matter on the surface of the last scattering produce anisotropies (in large angular scales θ ∼ > 10 ◦) that do not differ from the ones produced in Friedmann-Lemâıtre-Robertso...

2013

Although downloadable digital files have largely replaced physical media, the compact disc (CD) is still a popular medium for music distribution. The compact disc was the first digital medium designed for the consumer market and has become the most popular medium for commercial releases. It was envisioned as a replacement for the phonograph record, but with several important enhancements: not t...

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