Search results for "Beni"

ELECTRON SPIN RELAXATION PROCESS IN SILICON CRYSTALS

2014

Recently, electrical injection of spin polarization in n-type and p-type silicon has been experimentally carried out up to room-temperature. Despite of these preliminary but promising experimental results, a comprehensive theoretical framework concerning the influence of transport conditions on the phonon-induced spin depolarization process in silicon structures, in a wide range of values of temperature, doping concentration and amplitude of external fields, is still in a developing stage. In order to elucidate the electron transport and spin dynamics of conduction electrons in lightly doped n-type Si crystals we have performed semiclassical multiparticle Monte Carlo simulations and numeric…

Monte Carlo Simulation of Spin Relaxation of Conduction Electrons in Silicon

2014

Recently, electrical injection of spin polarization in n-type and p-type silicon up to room-temperature has been experimental- ly carried out. Despite of these promising experimental results, a comprehensive theoretical framework concerning the influence of transport conditions on the spin depolarization process in silicon structures, in a wide range of values of temperature, doping concentration and amplitude of external fields, is still in a developing stage. In this contribution we use a semiclassical multiparti- cle Monte Carlo approach to simulate the electron transport and spin dynamics in lightly doped n-type Si crystals and numerically calculate the spin lifetimes of drifting electr…

HOT-ELECTRON NOISE FEATURES IN SILICON CRYSTALS OPERATING UNDER PERIODIC SIGNALS

2014

We study the intrinsic noise in n-type Si crystals operating under high-frequency periodic electric fields. To simulate the dy- namics of electrons in the bulk, by taking into account the main details of band structure, scattering processes, as well as heating effects, a Monte Carlo approach is used. The noise properties are investigated by computing the velocity fluctuations correlation function, its spectral density, and the total noise power for different values of the amplitude and frequency of the driving field. We show that the noise features are significantly affected by the electric field amplitude and frequency and discuss their peculiari- ties in comparison with those exhibited in…

'Le fabbricerie'

2008

La fabbriceria è un’istituzione d’origine antichissima è ha il suo presupposto nella reciproca collaborazione tra pubblico e privato nella manutenzione delle chiese di maggiore importanza, soprattutto le cattedrali. Lo studio, partendo dalla constatazione del duplice dato apparentemente contraddittorio, della persistente utilità simbolica ed effettiva dell’istituto in punto di fatto ma giuridicamente assoggettato a una legislazione residuale, offre alcune possibili risposte alle questioni più annose emerse in dottrina e in giurisprudenza e in particolare con riguardo al duplice dubbio: se esse siano o meno ecclesiastiche, individuandone l’effettiva ‘ecclesiasticità lata’; se siano o meno en…

Ilustración, catolicismo y género. Feijoo en el debate historiográfico

2023

Este artículo revisa el resurgimiento de la noción de la «Ilustración católica» a partir de la década de 2010, el debate historiográfico que ha generado y el lugar que el ilustrado español Benito Jerónimo Feijoo (1676-1764) ocupa en él, en el marco de las controversias a propósito de las relaciones entre género, catolicismo e Ilustración (y más ampliamente, modernidad). Para ello se analizan los argumentos, las osadías y los límites de su discurso «Defensa de las mujeres» y, más ampliamente, a la actitud hacia las mujeres que se desprende del conjunto de su obra y su vida. Asimismo, se estudian algunas de las formas en que su ensayo fue apropiado con posterioridad en España y en otros terri…

Fibrillogenesis of hen egg-white lysozyme at acidic pH

2009

Role of electrostatic interactions in the fibrillogenesis of lysozyme

2011

Empirical Study on the Relationship between the Cross-Correlation among Stocks and the Stocks' Volatility Clustering

2013

In this paper we discuss univariate and multivariate statistical properties of volatility with the aim of understanding how these two aspects are interrelated. Specifically, we focus on the relationship between the cross-correlation among stock's volatilities and the volatility clustering. Volatility clustering is related to the memory property of the volatility time-series and therefore to its predictability. Our results show that there exists a relationship between the level of predictability of any volatility time-series and the amount of its inter-dependence with other assets. In all considered cases, the more the asset is linked to other assets, the more its volatility keeps memory of …

Supramolecular Association of Halochromic Switches and Halloysite Nanotubes in Fluorescent Nanoprobes for Tumor Detection

2022

Fluorescence imaging has become an indispensable tool in the biomedical laboratory to elucidate the fundamental dynamic and structural factors regulating cellular processes. The development of fluorescent nanoprobes represents a challenge to detect any cellular process under a microscope. Herein, a fluorescent nanomaterial was synthesized by exploiting the supramolecular interaction between a halochromic switch (1Cl) and halloysite nanotubes (HNTs). The successful synthesis of a HNTs/1Cl nanomaterial was confirmed by thermogravimetric analysis and Fourier transform infrared. The aqueous mobility was investigated by dynamic light scattering and ζ-potential measurements as well. Furthermore, …

Maltose-conjugated chitosans induce macroscopic gelation of pectin solutions at neutral pH

2014

Injectable polymer scaffolds are particularly attractive for guided tissue growth and drug/cell delivery with minimally invasive intervention. In the present work, "all-polymeric" gelling systems based on pectins and water-soluble maltose-conjugated chitosans (CM) have been developed. Maltose-conjugated chitosan has been synthesized at three different molar ratios, as evaluated by FITR analysis and fluorimetric titration. A thorough rheological characterization of the blends and their parent solutions has been performed. Macroscopic gelation has been achieved by mixing the high esterification degree pectins with CM at higher maltose grafted to chitosan contents. Gels form in a few minutes a…