Browsing División de Nanociencias y Materiales by Issue Date
Now showing items 41-60 of 438
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Micromagnetismo en nanoestructuras de metales de transición con diferentes geometrías: circulas, triangular y triangular de Reuleaux.
(2006)"En este trabajo de tesis presentamos los resultados obtenidos mediante simulación micromagnética, usando el código Oriented Micro Magnetic Framework; en diferentes sistemas ferromágneticos. En primer lugar presentamos el ... -
Attachment of transition metal nanoparticles on nitrogen doped carbon nanotubes (MWNTs-CNx) and their further reactions.
(2006)"The MWNTs-CNx exhibit important electronic and mechanical properties, that together with its small diameter, make them attractive for sensors production, substances specific filters and as field electrodes. Due to their ... -
The density matrix renormalization group applied to an electron-phonon hamiltonian.
(2006)"En esta tesis hemos aplicado el método de renormalización de grupo de la matriz densidad a un Hamiltoniano que introduce grados de libertad fonónicos, con el fin de entender al acoplamiento electrón-fonón que ocurre en ... -
Enhancement of entanglement using a tight-binding hamiltonian.
(2006)"Debido a la disminución del tamaño en los procesos de fabricación de microchips de computadora, se esta llegando a limites físicos donde efectos cuánticos pueden interferir en el desempeño de tales dispositivos. Por otra ... -
Transporte electrónico en ratchets cuánticos
(2006)"Actualmente, el problema de la miniaturización progresiva de los dispositivos electrónicos ha conducido a la elaboración de sofisticadas técnicas litográficas y de crecimiento cristalino. Gracias a estas técnica es que ... -
Síntesis y caracterización de nanotubos por molienda mecánica
(2006)"En este trabajo se presentan los resultados concernientes a la síntesis y caracterización de nanotubos de nitruro de boro producidos por un método de molienda mecánica-tratamiento térmico. En la primera etapa, el polvo ... -
Síntesis, caracterización y propiedades fisioquímicas de materiales nanoporosos de carbono.
(2006)"Nanoestructuras orgánicas autoensambladas (micelas), han sido usadas como moldes “blandos” para a través de una transformación 3D obtener replicas inorgánicas huecas: silicatos nanoporosos. En este trabajo se han sintetizado ... -
Sintesis y caracterización de materiales compuestos polímero/nanaotubos de carbono: Impacto de injerto de polÍmero a la superficie de los CNx MWNTs sobre las propiedades eléctricas y mecánicas de los nano-compuestos.
(2006)"Unos nuevos materiales híbridos, proviniendo del injerto de poliestireno a la superficie de unos nanotubos de carbono dopados con nitrógeno (CNx MWNT), fueron sintetizados y usados en la elaboración de nano-compuestos a ... -
Supersymmetric free-damped oscillators: adaptive observer estimation of the Riccati parameter
(2006)"A supersymmetric class of free damped oscillators with three parameters has been obtained in 1998 by Rosu and Reyes through the factorization of the Newton equation. The supple-mentary parameter is the integration constant ... -
Supersymmetry of FRW barotropic cosmologies
(2006)"Barotropic FRW cosmologies are presented from the standpoint of nonrelativis-tic supersymmetry. First, we reduce the barotropic FRW system of diferential equations to simple harmonic oscillator diferential equations. ... -
Inferring mixed-culture growth from total biomass data in a wavelet approach
(2006)"It is shown that the presence of mixed-culture growth in batch fermentation processes can be very accurately inferred from total biomass data by means of the wavelet analysis for singularity detection. This is accomplished ... -
A robust estimation of the exponent function in the Gompertz law
(2006)"The estimation of the solution of a system of two differential equations introduced by Norton et al. (1976) that is equivalent to the famous Gompertz growth law is performed by means of the recent adaptive scheme of ... -
Genetic algorithm optimization of entanglement
(2006)"We present an application of a genetic algorithmic computational method to the optimization of the concurrence measure of entanglement for the cases of one dimensional chains, as well as square and triangular lattices in ... -
Talbot effect for dispersion in linear optical fibers and a wavelet approach
(2006)"We shortly recall the mathematical and physical aspects of Talbot’s self-imaging effect occurring in near-field diffraction. In the rational paraxial approximation, the Talbot images are formed at distances z = p/q, where p ... -
Travelling-wave solutions for Korteweg-de Vries-Burgers equations through factorizations
(2006)"Travelling-wave solutions of the standard and compound form of Korteweg-de Vries-Burgers equations are found using factorizations of the correspond-ing reduced ordinary diferential equations. The procedure leads to solutions ... -
A survey of finite algebraic geometrical structures underlying mutually unbiased quantum measurements
(2006)"The basic methods of constructing the sets of mutually unbiased bases in the Hilbert space of an arbitrary finite dimension are reviewed and an emerging link between them is outlined. It is shown that these methods employ ... -
Shape invariance through Crum transformation
(2006)"We show in a rigorous way that Crum´s result regarding the equal eigenvalue spectrum of Sturm-Liouville problems can be obtained iteratively by successive Darboux transformations. Furthermore, it can be shown that all ... -
Self-image effects in diffraction and dispersion
(2006-06)"Talbot's self-imaging effect occurrs in near-field diffraction. In the rational paraxial approximation, the Talbot images are formed at distances z=p/q, where p and q are coprimes, and are superpositions of q equally ... -
Niederhauser's model for epilepsy and wavelet methods
(2006-06)"Wavelets and wavelet transforms (WT) could be a very useful tool to analyze electroencephalogram (EEG) signals. To illustrate the WT method we make use of a simple electric circuit model introduced by Niederhauser [1], ... -
A multidisciplinary study of carbon nanotube structures: from inorganic to biological systems
(2006-07)"The aerosol pyrolysis technique was used to produce carbon based nanostructures. Monocrystalline FeCo nanowires encapsulated inside multi-walled carbon nanotubes (MWNTs), centimeter-long strands of wide single walled ...