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Impacto de las Nuevas Tecnologías de la Información y la Comunicación para la Enseñanza de la Matemática en la Educación Superior
(Instituto Tecnológico de Costa Rica, 2014)
Se plantea cuáles son las implicaciones de la sociedad de la información y el conocimiento en el ámbito educativo y cómo en particular las tecnologías digitales están transformando el modelo de universidad tradicional, en ...
Una Forma Distinta para Hallar la Distancia de un Punto a una Recta
(Instituto Tecnológico de Costa Rica, 2015)
La siguiente propuesta nace de la iniciativa de compartir con los cole-gas, una prueba formal de un resultado que nos permite hallar la distancia de un punto a una recta. El resultado se diferencia de la relación típica ...
A mixed virtual element method for quasi-Newtonian stokes flows
(SIAM, 2018)
In this paper we introduce and analyze a virtual element method (VEM) for an augmented mixed variational formulation of a class of nonlinear Stokes models arising in quasi-Newtonian fluids. While the original unknowns are ...
A Monte Carlo Study of the Photon Spectrum due to the Different Materials Used in the Construction of Flattening Filters of LINAC
(Hindawi, 2017-07-10)
Different types the spectrum of photons were studied; they were emitted from the flattening filter of a LINAC Varian 2100 C/D that operates at 15 MV. The simplified geometry of the LINAC head was calculated using the MCNPX ...
A RTk - P-k approximation for linear elasticity yielding a broken H(div) convergent postprocessed stress
(Universidad Nacional, Costa Rica, 2015)
We present a non-standard mixed finite element method for the linear elasticity problem in R-n with non-homogeneous Dirichlet boundary conditions. More precisely, our approach is based on a simplified interpretation of the ...
A Priori and a Posteriori Error Analyses of an Augmented HDG Method for a Class of Quasi-Newtonian Stokes Flows
(Springer, 2016-12)
In a recent work we developed a new hybridizable discontinuous Galerkin (HDG) method for a class of nonlinear Stokes models arising in quasi-Newtonian fluids. The approach there uses the incompressibility condition to ...
A priori and a posteriori error analyses of an HDG method for the Brinkman problem
(Elsevier, 2018-01-15)
In this paper we introduce and analyze a hybridizable discontinuous Galerkin (HDG) method for the linear Brinkman model of porous media flow in two and three dimensions and with non-homogeneous Dirichlet boundary conditions. ...
Analysis of an Augmented HDG Method for a Class of Quasi-Newtonian Stokes Flows
(Springer, 2015)
In this paper we introduce and analyze a hybridizable discontinuous Galerkin (HDG) method for numerically solving a class of nonlinear Stokes models arising in quasi-Newtonian fluids. Similarly as in previous papers dealing ...
Analysis of an augmented pseudostress-based mixed formulation for a nonlinear Brinkman model of porous media flow
(Elsevier, 2015)
In this paper we introduce and analyze an augmented mixed finite element method for the two-dimensional nonlinear Brinkman model of porous media flow with mixed boundary conditions. More precisely, we extend a previous ...
Pollen classification based on geometrical, descriptors and colour features using decorrelation stretching method
(IFIP Advances in Information and Communication Technology, 2011-01)
Salvar la biodiversidad de la tierra para las generaciones futuras es una importante tarea global, donde el reconocimiento automático de especies de polen por medio de visión artificial representa un tema de alta prioridad. ...