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Now showing items 21-30 of 93
Curvatura en teorías generalizadas de Yang-Mills
(2009-01-13)
The curvature in R1+3 spaces with a generalized Yang-Mills connection is studied and the results are analyzed. Other options borne by modifications of the base space are also studied and commented. The present situation ...
Visualización de plasmas convectivos
(2011-02-11)
We present a study of the evolution of magnetic field in plasmas with different conductivities under the influence of a convective movement independent of time, which allows the description of either a single whirlwind, ...
Control de calidad en espectrometría gamma de bajo nivel
(2011-02-07)
Low level gamma spectrometry is a very precise techniqueto measure the concentration of nuclides present in different samples in Bq kg-1. The quality control of the procedure and method used be carried out by intercomparison ...
Semi- orthogonalities of class of Gauss hypergeometric functions
Semi- orthogonalities of class of Gauss hypergeometric functions
(2011-02-11)
We presented three semi-orthogonalities for a class of Gauss hypergeometric functions. We further employ the semi-orthogonalities to generate a theory concerning finite series expansion involving our hypergeometric functions.
Aplicación de las técnicas de punto fijo
Aplicación de las técnicas de punto fijo
(2011-02-15)
This article will develop a computacional procedure for approximating a fixed point of continuos functions of the simplex into itself using the Brouwer`theorem. We also shows the different applications of the theory of ...
Procesos emisores de fotones en dispersión de electrones
(2011-02-11)
The investigations involving the scattering cross sections arising in virtual and real photon emission processes of electron and positron scattering by an atomic nucleus, have the need for thorough and complete calculations ...
Nuevas lactonas sesquiterpénicas de Perymenium grande
(2009-01-13)
Three new sesquiterpenes lactonaes were isolated from the aerial parts of Perymenium grande Hemsl. (Asteraceae), collected around Rincón de la Vieja Volcano, Costa Rica. In addition to the three new lactones 1, 3 and 5; ...
La cinética de la esterificación de ácidos carboxílocos es de segundo orden con repecto al alcohol
(2009-01-13)
Esterification of carboxylic acids with alcohols is considered as AAC2 type reaction. The specific rate of esterification of acetic acid with methanol, in mixtures of acetonitrile-methanol showed a quadratic dependence on ...
Desórdenes del sistema musculoesquelético por trauma acumulativo en estudiantes universitarios de computación e informática
(2011-07-18)
The main objective of this research was to establish the correlation of Musculoskeletal Disorders (MSD ́s) by accumulative damage, among university ́s students from the computer science school (ECCI) at the Universidad de ...
Importancia de la batimetría de las planicies basales en la propagación de tsunamis transoceánicos
(2009-04-29)
The initial form of a tsunami originated by an homogeneous seismic source consists on a simple wave front. While the tsunami propagates in deep water, this simple form suffers several modifications by the tsunami's interaction ...