Distributed multimedia applications require a variety of levels of quality of service (QoS) from communication networks and end-systems which realize the multimedia interface with the human users or provide remotely accessed multimedia information. The management of these services has to take into account the available resources and the user's wishes concerning the desired quality and costs. Ba...

[1] Stratified stable layered mantle convection in a three-dimensional (3-D) spherical shell is investigated for a range of depth of layer, intrinsic density contrast between the layers (Dr), and heating mode. Three heating modes are studied: internal heating, bottom heating across core-mantle boundary, and both combined. For each heating mode, layers were investigated centered at depths from 5...

Gassmann's fluid substitution formulas for bulk and shear moduli were originally derived for the quasi-static mechanical behavior of fluid-saturated rocks. It has been shown recently that it is possible to understand deviations from Gassmann's results at higher frequencies when the rock is heterogeneous, and in particular when the rock heterogene-ity anywhere is locally anisotropic. On the othe...

A rigorous semi-analytical approach for specific microstructured optical fibers, which are formed by layered cylindrical arrays of circular rods symmetrically distributed on each of concentric circular rings, is presented for both of scalar-wave formulation and full-wave formulation. The method uses the T-matrix of a single circular rod, the reflection and transmission matrices for a cylindrica...

We apply a previously described lowest-Landau-level formalism to treat flux-lattice melting in artificially layered superconductors, using Monte Carlo methods. For a pin-free layered system, the model predicts a single phase transition with simultaneous ordering both within one layer and between layers. The melting curve calculated using this model agrees reasonably well with experiments of Koo...

The dynamic characteristics of field electron emission from the layered structures with quantum wells have been qualitatively analysed. The main factor leading to appearance of the high frequency current oscillation is the negative differential resistance, observed under rather high electrical field. Layered structures with superthin barriers (like Si Si02 6(Si) Si02) seems to be likely to show...