Browsing Artículos 2014 by Issue Date
Now showing items 21-40 of 106
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Irradiated graphene as a tunable Floquet topological insulator
(2014)In the presence of a circularly polarized mid-infrared radiation graphene develops dynamical band gaps in its quasienergy band structure and becomes a Floquet insulator. Here, we analyze how topologically protected edge ... -
Virtual laboratory for a first experience in dynamics
(2014)New technologies contribute to the learning process of scientific disciplines. In particular Physics learning may take advantage of these techniques by implementing experimental practices in simulation environments. Our ... -
Generalization of entropy based divergence measures for symbolic sequence analysis
(2014)Entropy based measures have been frequently used in symbolic sequence analysis. A symmetrized and smoothed form of Kullback-Leibler divergence or relative entropy, the Jensen-Shannon divergence (JSD), is of particular ... -
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 ... -
Algebraic functions in quasiprimal algebras
(2014)A function is algebraic on an algebra A if it can be implicitly defined by a system of equations on A. In this note we give a semantic characterization for algebraic functions on quasiprimal algebras. This characterization ... -
Experimental determination of L X-ray fluorescence cross sections for elements with 45 < Z < 50 at 10 keV
(2014)Synchrotron radiation at 10 keV was used to experimentally determine the Ll, La, LbI ,LbII , LgI and LgII fluorescence cross sections for elements with 45 < Z < 50, as part of an ongoing investigation at low energies. The ... -
Geometric formulation of the uncertainty principle
(2014)A geometric approach to formulate the uncertainty principle between quantum observables acting on an N-dimensional Hilbert space is proposed. We consider the fidelity between a density operator associated with a quantum ... -
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 ... -
Self-avoiding walks on a bilayer Bethe lattice
(2014)We propose and study a model of polymer chains in a bilayer. Each chain is confined in one of the layers and polymer bonds on first neighbor edges in different layers interact. We also define and comment results for a ... -
A posteriori error estimates for elliptic problems with Dirac measure terms in weighted spaces
(2014)In this article we develop a posteriori error estimates for second order linear elliptic problems with point sources in two- and three-dimensional domains. We prove a global upper bound and a local lower bound for the error ... -
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 ... -
Estudio del espectro fluorescente Ka 1,2 en Mn
(2014)Se presenta un estudio de alta resolución del espectro de emisión fluorescente Kα1,2deMn.El espectromedidopresenta asimetrías hacia el lado de bajas energías de los picosKα1y Kα2.Lainterpretación del ... -
On the nature of defects in liquid-phase exfoliated graphene
(2014)Liquid-phase exfoliation is one of the most promising routes for large-scale production of multilayer graphene dispersions. These dispersions, which may be used in coatings, composites, or paints, are believed to contain ... -
Kerma and photons absorbed-dose from Ir-192 HDR seeds
(2014)Precise calculations of absorbed dose (AD) are a difficult task involving physical phenomena such as emission, transport, and absorption of radiation. We used the Monte Carlo method to calculate Kerma as well as AD in water ... -
Lifting via cocycle deformation
(2014)We develop a strategy to compute all liftings of a Nichols algebra over a finite dimensional cosemisimple Hopf algebra. We produce them as cocycle deformations of the bosonization of these two. In parallel, we study the ... -
Classification of integral modular categories of Frobenius–Perron dimension pq4 and p2q2
(2014)We classify integral modular categories of dimension pq4 and p2q2, where p and q are distinct primes. We show that such categories are always group-theoretical, except for categories of dimension 4q2. In these cases there ... -
Lightning in Western Patagonia
(2014)On the basis of 8 years (2005-2012) of stroke data from the World Wide Lightning Location Network we describe the spatial distribution and temporal variability of lightning activity over Western Patagonia. This region ... -
Can we heal Chagas infection?
(2014)We present a model for the parasite-antibody dynamical competition between Trypanosoma rangeli and its antibodies during the acute phase of an infection in a mammal host. The model reproduces experimental data from murine ... -
Geometric approach to extend Landau-Pollak uncertainty relations for positive operator-valued measures
(2014)We provide a twofold extension of Landau-Pollak uncertainty relations for mixed quantum states and for positive operator-valued measures, by recourse to geometric considerations. The generalization is based on metrics ... -
On stochastic spatial patterns and neuronal polarity
(2014)Polarization refers to asymmetric changes in cellular organization that occur in response to external or internal signals. Although neurons can spontaneously establish and maintain asymmetric distributions of signalling ...
