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Tropical easterly waves over Costa Rica and their relationship to the diurnal cycle of rainfall
(2023-01)
Using an index of tropical easterly wave (TEW) activity derived from spacetime-filtered outgoing longwave radiation, we construct composites of long-term hourly surface meteorological observations and morningtime sounding ...
Optical component
(2010-02-15)
El invento trata de un componente óptico, que comprende un primer reflector esférico y un segundo reflector esférico, el cual está colocado para reflejar un rayo de luz varias veces entre el primer reflector y el segundo ...
Short term topological changes of coronal holes associated with prominence eruptions and subsequent CMEs
(2013-03-15)
We study the short-term topological changes of equatorial and polar coronal hole (CH) boundaries, such as a variation of their area and disintegration, associated to reconnection with nearby (within 15° distance) quiescent ...
The High-Altitude water cherenkov (HAWC) observatory in México: The primary detector
(2023-07)
The High-Altitude Water Cherenkov (HAWC) observatory is a second-generation continuously operated, wide field-of-view, TeV gamma-ray observatory. The HAWC observatory and its analysis techniques build on experience of the ...
A source of gamma rays coincident with the shell of the supernova remnant CTB 80
(2021)
CTB 80 (G69.0+2.7) is a relatively old (50–80 kyr) supernova remnant (SNR) with a complex radio morphology showing three extended radio arms and a radio and X-ray nebula near the location of the pulsar PSR B1951+32. We ...
Dose distribution for CBCT as an aid for radiation protection in dentistry
Distribución de dosis para CBCT como ayuda para la protección radiológica en odontología
(2023)
To characterize effective dose distributions in the craniofacial area for different acquisition parameters
of dental cone beam CT, thermoluminescent dosimeters (TLD) were placed within an anthropomorphic phantom for ...
Validación de Calidades de Rayos X Diagnósticos en el Laboratorio de Metrología de Radiaciones Ionizantes
Quality Validation of Diagnostic X-Ray in the Metrology Laboratory of Ionizing Radiation
(2018)
El objetivo del trabajo fue validar la calidad de radiación para energía de radiodiagnósticos del Laboratorio de Metrología de la Universidad de Costa Rica (UCR) como parte del proyecto técnico de cooperación COS9008 ...
Leaking elastic capacitor as model for active matter
(2021-05-24)
We introduce the “leaking elastic capacitor” (LEC) model, a nonconservative dynamical system that combines simple electrical and mechanical degrees of freedom. We show that an LEC connected to an external voltage source ...
Dynamical theory for the battery's electromotive force
(2021-03-23)
We propose a dynamical theory of how the chemical energy stored in a battery generates the electromotive force (emf). In this picture, the battery's half-cell acts as an engine, cyclically extracting work from its underlying ...
The 2:3:6 quasi-periodic oscillation structure in GRS 1915+105 and cubic subharmonics in the context of relativistic discoseismology
(Monthly Notices of the Royal Astronomical Society 440:3011-3015, 2014-06-01)
We propose a simple toy model to explain the 2:3:6 quasi-periodic oscillation (QPO) structure in GRS 1915+105 and, more generally, the 2:3 QPO structure in XTE J1550−564, GRO J1655−40 and H1743−322. The model exploits the ...