Mostrando ítems 11-20 de 27
Lavila Vidal, Olga (Fecha de defensa: 1999-01-01)
The aim of this work is to study the ring-theoretic properties of the diagonals of a Rees algebra, which from a geometric point of view are the homogenous coordinate rings of embeddings of blow-ups of ...
Romaní i Cornet, Anna M. (Fecha de defensa: 1997-10-21)
Helerotrophic (cetoenzymatic and respiratory activities) and autotrophic (photosynthetic activity) metabolism on epilithic strearn biofilms have been measured, analyzed and studied in this thesis.<br/><br/>The ...
Calvo Barrio, Lorenzo (Fecha de defensa: 1999-07-16)
The goal of this dissertation is the study and characterisation of high dose Carbon (C) implantation processes into Silicon (Si) and related materials for the synthesis of Silicon Carbide (SiC). The ...
Montero Torralbo, Miquel (Fecha de defensa: 1998-03-27)
This essay is devoted to the search for monochromatic gravitational wave signals in the data of the cryogenic detector "Explorer". With this aim several filtering procedures have been designed and ...
Llovet Ximenes, Xavier (Fecha de defensa: 1998-07-21)
Theoretical methods to compute accurate x-ray spectra emitted from targets bombarded with kV electrons are required for quantification in Electron Probe Microanalysis (EPMA), especially for the analysis ...
Parreño Garcia, Assumpta (Fecha de defensa: 1997-05-22)
In single A hypernuclei, a A hyperon can occupy any orbital in the hypernucleus since it is free from the Pauli exclusion principle due to its additional quantum number strangeness. <br/><br/>Due to the ...
Jorba i Monte, Àngel (Fecha de defensa: 1991-10-11)
In this work we study several topics concerning quasi-periodic time-dependent perturbations of ordinary differential equations. This kind of equations appear as models in many applied problems of Celestial ...
Haro, Àlex (Fecha de defensa: 1998-10-02)
We have divided this thesis in four parts:<br/><br/>a) PART I: Exact symplectic geometry (introduction of the problems). This part contains the basic tools of symplectic geometry and outlines the four ...
Elgueta Montó, Raimon (Fecha de defensa: 1994-05-25)
In our opinion, it is fair to distinguish two separate branches in the origins of model theory. The first one, the model theory of first-order logic, can be traced back to the pioneering work of L. ...
Centelles Aixalà, Mario (Fecha de defensa: 1992-07-30)
The nuclear many-body problem is nowadays being increasingly approached on the basis of a relativistic formalism. Microscopic Dirac-Brueckner-Hartree-Fock (DBHF) calculations starting from a realistic ...