Browsing Ciencias básicas by Title
Now showing items 215-234 of 3106
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An overlapping preconditioner for 2D virtual problems posed in H(rot) with irregular subdomains
(2022)We present a two-level overlapping Schwarz preconditioner for problems posed in H(rot) in two dimensions, that extends previous methods for Nédélec elements (triangular meshes) to general polygonal partitions (virtual ... -
An overlapping Schwarz method for virtual element discretizations in two dimensions
(2019)A new coarse space for domain decomposition methods is presented for nodal ellipticproblems in two dimensions. The coarse space is derived from the novel virtual elementmethods and therefore can accommodate quite irregular ... -
An overview of bird records committees in the Neotropics
(2018)Neotropical bird records committees have been growing in numbers, remit and prominence in recent years. This feature – by members of those committees – explains how and why committees were established and encourages birders ... -
An unusual disjunction in Loasaceae: Central American Chichicaste grandis is nested in Brazilian Aosa
(2018)The highly distinctive genus Chichicaste is restricted to the Costa Rica-Chocó Biogeographic Hotspsot from Costa Rica to northwestern Colombia and comprises a single species, C. grandis. Relationships of this taxon have ... -
An update on the myxomycete biota (Amoebozoa: Myxogastria) of Colombia
(2012-08-01)Twelve new records of myxomycetes are reported for Colombia. These additions increase the number of myxomycetes known from this country to 108 species. Since the Colombian territory is part of a biodiversity-rich region in ... -
Analiticity of the Lyapunov exponents of random products of quasi-periodic cocycles
(2021-11-01)We show that the top Lyapunov exponent LE(p) associated with a random product of quasi-periodic cocycles depends real analytically on the transition probabilities p whenever LE(p) is simple. Moreover if the spectrum at ... -
Analysis and mixed-primal finite element discretisations for stress-assisted diffusion problems
(2018)We analyse the solvability of a static coupled system of PDEs describing the diffusion of a solute into an elastic material, where the process is affected by the stresses exerted in the solid. The problem is formulated in ... -
Analysis of a semi-augmented mixed finite element method for double-diffusive natural convection in porous media
(2022-05-15)In this paper we study a stationary double-diffusive natural convection problem in porous media given by a Navier-Stokes/Brinkman type system, for describing the velocity and the pressure, coupled to a vector advection-diffusion ... -
Analysis of a vorticity–based fully–mixed formulation for 3D Brinkman–Darcy problem.
(2016)We propose and analyze a fully-mixed finite element method to numerically approximate the flow patterns of a viscous fluid within a highly permeable medium (an array of low concentration fixed particles), described by ... -
Analysis of climate impacts in Costa Rica, Central America, from local historical information sources
(8th Alexander von Humboldt International Conference: Natural Disasters, Global Change, and the Preservation of World Heritage Sites". 12-16/11/2012. Cusco, Perú., 2012-11-12)Central America and Mexico is a region that account for many World Heritage Sites. Among the climate hazards that affects this rich world heritage place of the world are the boreal winter cold fronts intrusions, also known ... -
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 ... -
Analysis of genetic diversity of Cucurbita moschata (D.) germplasm accessions from Mesoamerica revealed by PCR SSCP and chloroplast sequence data
(2012-02)The aim of this research was the genetic characterization of 218 accessions of Cucurbita moschata Duchesne, a squash, and its relationship with morphological characteristics of agronomic interest, which are part of the ... -
Analysis of glyphosate and aminomethylphosphonic acid in leaves from Coffea arabica using high performance liquid chromatography with quadrupole mass spectrometry detection
(2016-01-01)Glyphosate is a commonly applied herbicide in coffee plantations. Because of its non-selective mode of action it can damage the crop exposed through spray drift. Therefore, it is of interest to study glyphosate fate in ... -
Analysis of Seismic Activity near Theodore Roosevelt Dam, Arizona, during the Occupation of the EarthScope/USArray Transportable Array
(2012)Rate and distribution of seismic activity are important indicators of the overall state of tectonic stress within a region. In regions characterized by low levels of seismicity, active fault surfaces are rarely visible at ... -
Analysis of the Latin American west coast rainfall predictability using an ENSO index
(2015)El objetivo de este estudio es determinar la probabilidad de ocurrencia de estaciones lluviosas o secas a lo largo de la costa oeste de Centro y Sudamérica, mediante la construcción de perfiles latitudinales para la ... -
Analyzing the Measurement Equivalence of a Translated Test in a Statewide Assessment Program
(2016-09)When tests are translated into one or more languages, the question of the equivalence of items across language forms arises. This equivalence can be assessed at the scale level by means of a multiple group confirmatory ... -
Anathallis transtalamancana Karremans & Chinchilla, sp. nov.
(2020-08-18)The new species is similar to A. endresii (Luer) Pridgeon & M.W.Chase, but can be distinguished by the 1-2-flowered raceme (vs. 3-4-flowered), the yellowish (vs. purple), glabrous, 4.6-4.8 mm long sepals (vs. ciliate, ... -
Análisis de datos de CTD de campañas oceanográficas recientes en el Pacífico Tropical del Este, Costa Rica
(2017)Un CTD es un instrumento oceanográfico el cual permite medir la conductividad, temperatura y presión. Los datos producidos por un CTD permiten calcular otras variables como la salinidad. La información generada permite la ... -
Análisis de eventos fríos y cálidos por medio de datos de buceo: un enfoque de ciencia ciudadana en el Golfo de Papagayo, Costa Rica
(2021)Introducción: en el año 2011 y como una iniciativa de Ciencia Ciudadana, los propietarios de la tienda Deep Blue Diving Shop en Playa del Coco, Guanacaste, Costa Rica, iniciaron a recolectar diariamente los datos de ...