Listar Física por procedencia "UCR::Vicerrectoría de Docencia::Ciencias Básicas::Facultad de Ciencias::Escuela de Física"
Mostrando ítems 1-20 de 56
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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 ... -
A thermodynamic cycle for the solar cell
(2017-01-06)A solar cell is a heat engine, but textbook treatments are not wholly satisfactory from a thermodynamic standpoint, since they present solar cells as directly converting the energy of light into electricity, and the current ... -
Analysis of Fermi-LAT observations, UHECRs and neutrinos from the radio galaxy Centaurus B
(2019-08-20)Centaurus B (Cen B) is one of the closest and brightest radio-loud galaxy in the southern sky. This radio galaxy, proposed as a plausible candidate for accelerating ultra-high-energy cosmic rays (UHECRs), is near the ... -
La Batalla de la Trinidad de Sarapiquí de 1856: Comprendiendo el origen de las municiones a través del análisis químico y microestructural
(2023)Infografía sobre la investigación de muestras arqueológicas de la batalla de la Trinidad de Sarapiquí, campaña 1856-1857. -
Chandler wobble: Stochastic and deterministic dynamics
(2016-09-18)We propose a model of the Earth’s torqueless precession, the “Chandler wobble,” as a self-oscillation driven by positive feedback between the wobble and the centrifugal deformation of the portion of the Earth’s mass contained ... -
Converging science and literature cultures: learning physics via The Little Prince novella
(2018)Primary level education follows a pedagogy model where literature and science have been historically separated. Natural children processes are disrupted, as learning based on play curiosity is completely transformed by a ... -
Cosmological Exact Solutions Set of a Perfect Fluid in an Anisotropic Space-Time in Petrov Type D
(2016-06)In this document a set of exact solutions is obtained by using the model of a perfect fluid on an homogeneous and anisotropic space-time that belongs to (Local Rotational Symmetry) Petrov’s type D. This solutions represent ... -
Determination of the dosimetric characteristics of a new polymer-encapsulated, elongated, 103Pd brachytherapy source using Monte Carlo calculations
(2009)Purpose: To use Monte Carlo calculations to determine the dosimetric characteristics of CivaString, a new polymer-encapsulated, elongated, 103Pd brachytherapy source made by Civatech Oncology for prostate implants. This ... -
Diseño y caracterización de un enfriador de átomos de tipo “desacelerador Zeeman”
(2016)Nosotros presentamos un método que utiliza simultáneamente dos modelos matemáticos, con el objetivo de optimizar el diseño de un desacelerador Zeeman, con miras a la implementación de átomos ultrafríos a la física del ... -
Distribución espacial de impactos de eventos hidrometeorológicos en América Central
(2016)América Central está expuesta a la ocurrencia de eventos hidrometeorológicos a lo largo del año y los impactos que estos pueden provocar van a estar mayormente localizados en áreas donde las variables tanto naturales como ... -
Do Magnetic Fields Destroy Black Hole Accretion Disk g-Modes?
(2015-08-04)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 ... -
Dosimetry and Toxicity Studies of the Novel Sulfonamide Derivative of Sulforhodamine 101([18f]srf101) at a Preclinical Level
(2019)Abstract: Background: The SR101 N-(3-[18F]Fluoropropyl) sulfonamide ([18F]SRF101) is a Sul forhodamine 101 derivative that was previously synthesised by our group. The fluorescent dye SR101 has been reported as a marker ... -
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 ... -
Energy exchange between atoms with a quartz crystal μ-balance
(2018)We propose an experimental method to fully characterize the energy exchange of particles during the physical vapor deposition (PVD) process of thin surface layers. Our approach is based on the careful observation of ... -
Evaluación de la Seguridad Radiológica del CICANUM: Laboratorio de Metrología de Radiaciones Ionizantes y Almacén de Residuos Radiactivos
(2018)El Centro de Investigación en Ciencias Atómicas, Nucleares y Moleculares (CICANUM) posee laboratorios que constituyen un riesgo radiológico latente, tales como, el Laboratorio de Metrología de Radiaciones Ionizantes (LMRI) ... -
Evaluation of [18F] FNM biodistribution and dosimetry based on whole-body PET imaging of rats
(2018)Introduction: The aim of this work was to study the biodistribution, metabolism and radiation dosimetry of rats injected with [18F]FNM using PET/CT images. This novel radiotracer targeting NMDA receptor has potential ... -
Exact solution of an ekpyrotic fluid and a primordial magnetic field in an anisotropic cosmological space-time of Petrov D
(2017)This document obtained and analyzed an exact solution of an ekpyrotic fluid (P = 5/3 µ) and a primordial magnetic field, so that the latter does not induce currents or electric fields. It is determined that the main role, ... -
Exact Solutions of a Chaplygin Gas in an Anisotropic Space-Time of Petrov D
(2017)This document obtains two exact solutions to the anisotropic spacetime of Petrov D by using the model of a perfect fluid. These solutions represent a scenario of a universe in which the pressure P and the energetic density ... -
Fermi-LAT detection of G118.4+37.0: a supernova remnant in the Galactic halo seen around the Calvera pulsar
(2023)The discovery of a non-thermal radio ring of low surface brightness about one degree in diameter has been recently reported around the location in the sky of the Calvera pulsar, at a high Galactic latitude. The radio ... -
Física y Poesía: T.S. Eliot
(1992)Tres poemas de T.S. ELIOT, publicados en 1989, sugieren que el autor tenía conocimientos tanto de física clásica como de física moderna. En este artículo se describen los conceptos físicos tratados y se hace referencia ...