We are presenting experimental work on an erbium-doped fiber operating in the superluminescent regime. Experimental results for different pump power levels and fiber length show that the theoretical and numerical model could render useful information for predicting the total output…

The design of a beam-forming network (BFN) for a multibeam-steerable antenna array using Coherently Radiating Periodic Structures (CORPS) is presented. In this design, the input ports of the feeding network are optimized using the particle swarm optimization (PSO) algorithm. A…

We show some instances of singular lagrangians from the classical mechanics of particles and apply Dirac's method for building the canonical equations. We find then the reason for the singularity, and therefore, we get the Hamilton equations with the familiar…

Based on the pulsed photoacoustic effect, we set up an experimental system to obtain bi-dimensional images of optically-opaque samples embedded within the bulk of turbid medium. The turbid medium was made of agar gel mixed with single-sized nanoparticles; with these…

The manufacturing process of metal parts is subjected to machining instabilities that can degrade the surface finish quality and the reliability of products. Some instabilities are of transient nature and traditional inspection systems are unable to adequately estimate the grade…

The performance of dye-sensitized solar cells (DSSC) based on natural dyes extracted from five different sources is reported. These are inexpensive, have no nutritional use, and are easy to find in Mexico. The solar cells were assembled using a thin…

This work describes the principal component analysis (PCA) applied to Raman spectra of polycrystalline BaTiO3 as a function of temperature. During each experiment the samples was continuously heated and the Raman spectrum was registered every 0.5 °C at a rate…

A simple algorithm and a computational program to numerically compute the electric field gradient and the concomitant quadrupolar nuclear splitting is developed for an arbitrary ionic crystal. The calculations are performed using a point charge model. The program provides three…

This paper shows the development of a optimal stochastic estimator for a black-box system in a m-dimensional space, observing noise with an unknown dynamics model. The results are based in state space, described by a discrete stochastic estimator and noise…

In this work we present the results obtained through electron paramagnetic resonance (EPR) spectroscopy of the study of the hyperfine interaction of the Vk centres in the Cesium, sodium, yttrium hexachloride (Cs2NaYCl6) crystals. These electron defect centres are created by…