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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 ...
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 ...
Diurnal patterns in lightning activity over South America
(2014)
Satellite and ground network observations of lightning flash distribution data are used to examine the diurnal cycle of lightning activity over the tropical and subtropical regions of South America. The results show in ...