We present a new procedure to obtain analytic expressions for tracing rays in plates and wedges used edgewise applying the unfolding method for ray tracing, to be able to analyze the behavior of these optical components for transporting light in…

Motivated by the recent computations of the quasinormal frequencies of higher dimensional black holes, we exactly calculate the quasinormal frequencies of the Dirac field, propagating in D-dimensional (D > 4) massless topological black hole. From the exact values of the…

A method for reducing splice loss between dissimilar optical fibers is presented. The fibers are first spliced by using a standard fusion splicing procedure, and then the fiber with the greater core is tapered before the splice point, while the…

We study the dependence of the magnetic properties of NiPd and CoPd segregated nanoclusters and slabs as a function of the 3d magnetic component concentration (x), the chemical order, and size. In the case of clusters we consider 3d cores…

Entanglement generated by the Heisenberg model has been studied by several authors in order to understand its relation to the magnetic properties of materials, using mainly particular cases in one or two dimensions for two or more particles. In this…

We performed measurements of electrical resistivity as a function of temperature, ρ(Τ), in polycrystalline samples of YBa2Cu3O7-δ (Y-123) subjected to different uniaxial compacting pressures. We observed by using X-ray diffractometry that samples have a very similar composition. Most of the…

The results of a density functional theory (DFT) study of the bonding between water and an ionized copper atom are presented through an all-electron calculation. The C1, C2v and Cs approaches of the metal atom toward the oxygen atom on…

OBJECTIVE: To analyse the medicines prescription, prescription filling, payment expenditure for medicines by ambulatory health service users (HSU) in 2006, and to evaluate its evolution in the last 12 years. MATERIAL AND METHODS: Using data from the National Health Surveys…

OBJECTIVE: We aim to assess the opinions of Mexicans in the state of Tlaxcala on abortion and other topics concerning women's reproductive health and status in society. MATERIAL AND METHODS: We summarize opinions on abortion and women's roles in society…

A bacterial consortium which degrades tetrachlorvinphos (phosphoric acid, 2-chloro-1-(2,4,5-trichlorophenyl) ethenyl dimethyl ester) was isolated from agricultural soil. This consortium was composed of six pure strains which were characterized based on their morphological and biochemical characteristics. The strains were presumptively identified…