Facultad de Matemática, Astronomía, Física y Computación: Recent submissions
Now showing items 301-320 of 1232
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On Dirichlet problems with singular nonlinearity of indefinite sign
(2015)Let Ω be a smooth bounded domain in RN , N ≥ 1, let K, M be two nonnegative functions and let α, γ > 0. We study existence and nonexistence of positive solutions for singular problems of the form −Δu = K(x)u−α − λM (x)u−γ ... -
Implementation of an F-statistic all-sky search for continuous gravitational waves in Virgo VSR1 data
(2014)We present an implementation of the F -statistic to carry out the first search in data from the Virgo laser interferometric gravitational wave detector for periodic gravitational waves from a priori unknown, isolated ... -
Co100-xFex magnetic thick films prepared by electrodeposition
(2015)Co–Fe films are grown onto plane pre-treated Cu foils; the effects of the alloy composition on the morphology and the crystal texture of the electrodeposited films and their anisotropic magnetic hysteresis properties are ... -
Estudio de propiedades de sistemas de pocos cuerpos usando medidas de información : sistemas de dos cuerpos y nanoestructuras semiconductoras
(2022-07)Los avances tecnológicos logrados en las últimas décadas, y la aspiración a producir dispositivos que funciones en el régimen cuántico para aprovechar sus novedosas propiedades, impulsan el estudio de determinados estados ... -
Effects of magnetic field gradients on the aggregation dynamics of colloidal magnetic nanoparticles
(2015)We have used low-field 1H nuclear-magnetic resonance (NMR) spectroscopy and molecular dynamics (MD) to investigate the aggregation dynamics of magnetic particles in ionic ferrofluids (IFFs) in the presence of magnetic field ... -
Isomorphism and disorder in o-chlorohalobenzenes studied by NQR
(2014)In this work we present experimental results that allow to characterize different solid modifications found in o-chlorohalobenzenes. Three disordered phases have been found in o-chlorobromobenzene. The stable phase at ... -
Water and membrane dynamics in suspensions of lipid vesicles functionalized with poly(ethylene glycol)s
(2014-05-08)The present work was aimed at studying the molecular dynamics at different levels of model membranes having a simulated glycoclix, with focus on the molecular crowding conditions at the lipid–water interfacial region. Thus, ... -
Memory and long-range correlations in chess games
(2014)In this paper we report the existence of long-range memory in the opening moves of a chronologically ordered set of chess games using an extensive chess database. We used two mapping rules to build discrete time series and ... -
Lentes plasmáticas en entornos de objetos compactos
(2022-03-28)La deflexión de la luz por potenciales gravitatorios es un fenómeno clásico de la Relatividad General. Es sabido que objetos compactos generan efectos de lente gravitacional convergente. En este trabajo, estudiaremos como ... -
Obstacles modelling reality: two exploratory studies on physics defined and undefined problems
(2014)One important skill to be developed in future physicists is modelling reality using physics. Problem-solving is the activity most used to teach, learn and assess physics skills at the university level. However, most of the ... -
Improving furosemide polymorphs properties through supramolecular complexes of beta-cyclodextrin
(2014)In this work, complexes of β-cyclodextrin and the two solid forms of furosemide were prepared and characterized for their potential pharmaceutical applications, with the interactions between the two compounds being studied ... -
Silver L1, L2 and L3 cross-sections for ionization and x-ray production by electron impact
(2014)The experimental determination of ionization cross-sections and total x-ray production cross-sections under electron impact is carried out for the three silver L-subshells. The very complex spectral structure involving ... -
Identificación, mapeo y estimación de biomasa de los pastizales en la región ganadera de Argentina utilizando imágenes ópticas y SAR
(2022-07)Como primera instancia para este trabajo de investigación, se plantearon las bases teóricas para la estimación de biomasa de los pastizales naturales mediante el uso de imágenes ópticas (S-2 y L-8) y SAR (S-1) para una ... -
Métodos computacionales para optimización local y global sin derivadas
(2021-07)En esta tesis doctoral presentamos y desarrollamos dos nuevos modelos de optimización sin derivadas. En primer lugar, proponemos un nuevo método de búsqueda de patrones para optimización local, denominado algoritmo nmps, ... -
Técnicas de optimización para el proceso de grounding en planning clásico
(2020-05)La planificación automática, o simplemente Planning es una de las áreas más antiguas y centrales dentro de la Inteligencia Artificial. En ella, se estudia la generación automática de acciones por parte de agentes inteligentes ... -
Air core notch-coil magnet with variable geometry for fast-field-cycling NMR
(2015)In this manuscript we present details on the optimization, construction and performance of a wide-bore (71 mm) a-helical-cut notch-coil magnet with variable geometry for fast-field-cycling NMR. In addition to the usual ... -
Modelado de tasas de interés. El modelo Libor market con varianza gaussiana cuadrática
(2019)Esta tesis se divide en dos partes. Comenzamos con el estudio de modelos continuos de tasas forward y la consistencia con los modelos de tasa short. En este trabajo presentamos dos variedades de curvas de Nelson y Siegel ... -
Influence of β-cyclodextrin on the Properties of Norfloxacin Form A
(2014-12-16)Cyclodextrins are able to form host-guest complexes with hydrophobic molecules to result in the formation of inclusion complexes. The complex formation between norfloxacin form A and β-cyclodextrin was studied by exploring ... -
Caracterización morfológica por micro-tomografía computada de piezas dentales con tratamientos de conducto
(2022-07)La micro-tomografía (𝜇CT) es una de las técnicas analíticas de contraste por absorción por medio de imágenes de rayos X de interés en diversas áreas de ciencia y tecnología, por su capacidad de lograr una caracterización ... -
Spherical functions associated with the three dimensional sphere
(2014)In this paper, we determine all irreducible spherical functions of any K-type associated to the pair (G;K) = (SO(4); SO(3)). This is accomplished by associating to a vector valued function H = H(u) of a real variable ...