Now showing items 21-30 of 50
Do Magnetic Fields Destroy Black Hole Accretion Disk g-Modes?
Diskoseismology, the theoretical study of normal-mode oscillations in geometrically thin, optically thick accretion disks, is a strong candidate for explaining some quasi-periodic oscillations in the power spectra of many ...
Study of oxide bands in p-type porous silicon layers
The interest in developing fast and reliable chemical and biochemical sensors in an inexpensive way is something that has attracted a lot of efforts in the last decades. One of the potential material candidates is ...
Cooperative elastic fluctuations provide tuning of the metal-insulator transition
Metal-to-insulator transitions driven by strong electronic correlations occur frequently in condensed matter systems, and are associated with remarkable collective phenomena in solids, including superconductivity and ...
Relation between Luminescence and Electronic Surface Characteristics in p-type Porous Silicon
Measurements of photoluminescence, electronic surface states and effective surface area, at various stages of the anodization process, are presented. The results show a behavior different from that observed on n-type porous Si.
Quantum Theory of Triboelectricity
We propose a microphysical theory of the triboelectric effect by which mechanical rubbing separates charges across the interface between two materials. Surface electrons are treated as an open system coupled to two baths, ...
Estudio multi-longitudinal comparativo de las oscilaciones de manchas y filamentos solares y su implicación en la evolución de filamentos
Se considera que las oscilaciones de períodos largos en los filamentos/prominencias observadas en EUV podrían conducir al filamento a un estado inestable, sin embargo, sus características (rango de frecuencia, amplitud, ...
(Hydro)climatological studies of climate change and variability in Central America
This is the presentation of Hugo Hidalgo at the CORDEX Central America and South America Training Workshop on Downscaling Techniques, in La Paz, Bolivia, June 25 to 27, 2018.
Search for gamma-ray emission from star-forming galaxies with Fermi LAT
Recent studies have found a positive correlation between the star-formation rate of galaxies and their gamma-ray luminosity. Galaxies with a high star-formation rate are expected to produce a large amount of high-energy ...
Observed Changes (1970-1999) in Extreme Hydroclimatic Events in Central America
Previous studies have shown that most of Central America has been experiencing warming trends during the last 30-50 years, while precipitation annual totals have not changed much. Warming alone can exacerbate the effects ...
The Hubble Constant and the Deceleration Parameter in Anisotropic Cosmological Spaces of Petrov type D
In this paper the Hubble parameter and the deceleration parameter are analyzed for a group of anisotropic homogeneous solutions of the Petrov type-D. It is obtained that for the said set of solutions can be constructed a ...