We report an application of the Schwinger variational principle with plane waves as a trial basis set. Differential cross sections are obtained for e- - H2O from 10 to 50 eV. In these studies the exchange potential is evaluated by…

It is shown that a given non-autonomous system of two first-order ordinary differential equations can be expressed in Hamiltonian form. The derivation presented here allows us to obtain previously known results such as the infinite number of Hamiltonians in the…

The nitrides of magnetic metal are becoming important due to their potential technological applications. In this work cobalt nitride thin films are deposited by reactive pulsed laser deposition (nitrogen environments) on silicon substrates at room temperature. The resultant films are…

We present the design of a demultiplexer based on photonic crystals (PC). The control of the refractive index, periodicity, geometry and size of the structure, are very important to light propagation in PC. The demultiplexer is intended to separate pulse…

Variations of solar irradiance (total and spectral) are quantities purported to have an influence on climate. The aim of this paper is to reconstruct the total solar irradiance from 1832 to the present. The contributions of active regions and the…

A new mutation (V617F) affecting the JAK2 gene has been recently described as acquired in patients with myeloproliferative disorders and other myeloid malignancies. Using an amplification refractory mutation system, we investigated this mutation in 70 Mexican mestizo patients with hematological…

Potential energy surfaces of the ground state ³D(5d(9)6s¹) and the first excited state ¹S(5d10) of the Pt-H2 interaction are calculated by using variational and perturbative MRCI and pseudopotential relativistic methodologies in order to obtain the distances and the energies of…

Canonical Molecular Dynamics simulations have been performed to calculate thermodynamic properties in the liquid phase and at the liquid-vapor interface for fluids interacting by Morse potential. Transport properties such as self diffusion and shear viscosity have been calculated in one…

We perform a detailed analysis on the scaling properties of the total cross section, . We write the cross section as a product of two functions W and V representing, respectively, the dynamical degrees of freedom and the…

Drag reduction (DR) by the use of polymer and surfactant solutions is by far the most effective drag-reducing technique for turbulent flows (up to 8-fold reduction in friction coefficients is possible on straight pipes). From a fundamental point of view,…