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Now showing items 11-20 of 91
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 ...
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 ...
Visualización científica de lentes gravitacionales
Visualización científica de lentes gravitacionales
(2011-02-16)
Concepts related to gravitatonal lenses are discussed and applied to develope an interactive visualization tool that allow us to investigate them. Optimization strategies were performed to elaborated the tool. Some results ...
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.
Las cuerdas magnéticas
(2009-01-13)
The conception of the magnetic string is presented; it is an infinitely thin bundle of magnetic flux lines. They are surrounded by a film of current that rotates around them, and are a solution of Maxwell’s equations. Their ...
Niveles de radioactividad en tres regiones de Costa Rica
Niveles de radioactividad en tres regiones de Costa Rica
(2011-02-15)
The establishment of the first radioactivity levels of natural radiation was carried out during the period 1991 to 1994 in three different regions of Costa Rica. The radionuclides studied belong to different soil types ...
Acerca de si pudo o no ser el universo anisotrótipico
Acerca de si pudo o no ser el universo anisotrótipico
(2011-02-15)
The theoretical and experimetnal problem concerning the origin and formations of the universe is establish in this paper, specially by developing some theories that try to explain this phenomena, and also to settle the ...
Álgebras-MV artinianas y noetherianas
Álgebras-MV artinianas y noetherianas
(2011-02-11)
We study MV-algebras that satisfacy tha ascending of descending chain conditions on ideals. We demostrarted, for example, if an MV-algebra is artianan, then it has a finite number of minimal prime ideals. We also show the ...
Álgebras-MV artinianas y noetherianas
(2011-02-14)
Estudiamos álgebras-MV que satisfacen las condiciones de cadena ascendente o de cadena descendente por ideales. Por ejemplo, si un álgebra es artiana, entonces tiene un número finito de ideales primos y minimales. También ...
On the right commutativity of loop rings
(2011-02-11)
Its proved that extra loops and central loops are conjugated closed, consequently they are G-loops. It is also proved that extra loops and central loops are M-loops.