Héctor Guerrero

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We have developed a formula that assigns relative values to each author of the list in any publication according to the authors' relative positions. The formula satisfies several criteria of theoretical and practical significance. We tested the formula's validity and usefulness with bibliographical references from the INSPEC database, mainly from the(More)
This paper presents data on proton displacement damage on light-emitting diodes (LEDs) and infrared emitting diodes (IREDs) of different technologies between 650 and 950 nm. 160 devices of a variety of 28 different COTS emitters were irradiated. Most irradiations were carried out with 52 MeV protons. Two components were also studied with 30 and 60 MeV(More)
BACKGROUND The prognostic value of natriuretic peptides in heart failure (HF) is well established. The objective of this study was to evaluate the role of NT-proBNP in predicting outcome in decompensated HF. METHODS Patients admitted with decompensated HF to our Internal Medicine Department between November 2002 and April 2004 with at least two(More)
An optical method to determine the nanostructure and the morphology of porous thin films is presented. This procedure is based on the response of a side-polished optical fiber with the film under study, when an adsorption-desorption cycle is carried out. Spectroscopic ellipsometry provides additional information about the optical properties and adsorption(More)
The time required to image large samples is an important limiting factor in SPM-based systems. In multiprobe setups, especially when working with biological samples, this drawback can make impossible to conduct certain experiments. In this work, we present a feedfordward controller based on bang-bang and adaptive controls. The controls are based in the(More)
Components off the shelf (cots) photodiodes suitable for OWLS were irradiated with ~10 to ~60 MeV protons and up to fluences of ~2.5-10<sup>12</sup> p/cm<sup>2</sup>. Electrical and optoelectronic parameters were measured during the test (I-V curves, dark current, responsivity and ideal diode factor). Results on degradation and post-annealing are reported.(More)
A focused-ion-beam-assisted technique intended for ultrasmall, hard-magnet fabrication has been developed. By means of ion-beam-induced milling and deposition, reduced-size NdFeB magnets were extracted from a macroscopic quarry and bonded to the surface of a thin-film bulk acoustic resonator (FBAR). Electrical characterization of the FBAR before and after(More)
The replacement of single-crystal compounds by polycrystalline compounds in some magneto-optical devices is proposed. For this purpose a characterized polycrystalline, Cd(0.55)Mn(0.45) Te, has been manufactured. Its Verdet constant and cutoff wavelength are identical to those of single crystals of the same composition. Optical transmission is lower in(More)
Oxygen and air mixing with spargers was performed in a 30 foot tall by 30 inch diameter column, to investigate mass transfer as air sparged up through the column and removed saturated oxygen from solution. The mixing techniques required to support this research are the focus of this paper. The fluids tested included water, water with an antifoam agent(More)