Lump solitons in a higher-order nonlinear equation in 2+1 dimensions

We propose and examine an integrable system of nonlinear equations that generalizes the nonlinear Schrodinger equation to 2 + 1 dimensions. This integrable system of equations is a promising starting point to elaborate more accurate models in nonlinear optics and molecular systems within the continuum limit. The Lax pair for the system is derived after applying the singular manifold method. We also present an iterative procedure to construct the solutions from a seed solution. Solutions with one-, two-, and three-lump solitons are thoroughly discussed

Spin dynamics in helical molecules with nonlinear interactions

It is widely admitted that the helical conformation of certain chiral molecules may induce a sizable spin selectivity observed in experiments. Spin selectivity arises as a result of the interplay between a helicity-induced spin-orbit coupling (SOC) and electric dipole fields in the molecule. From the theoretical point of view, different phenomena might affect the spin dynamics in helical molecules, such as quantum dephasing, dissipation and the role of metallic contacts. With a few exceptions, previous studies usually neglect the local deformation of the molecule about the carrier, but this assumption seems unrealistic to describe charge transport in molecular systems. We introduce an effective model describing the electron spin dynamics in a deformable helical molecule with weak SOC. We find that the electron-lattice interaction allows the formation of stable solitons such as bright solitons with well defined spin projection onto the molecule axis. We present a thorough study of these bright solitons and analyze their possible impact on the spin dynamics in deformable helical molecules

Interactivity in Latin American digital journalism. An analysis of the main digital media of Colombia, Mexico and Ecuador (2016)

Introduction: Latin America, in general terms, is a continent with several contextual levels, which depend on historic, economic, political and social characteristics. Despite all this, there are aspects -such as digital divide- that occur again, to a greater or lesser extent, in the different Latin American countries. This digital divide promotes partially disconnected -and thus, invisible- societies, and tends to slow down possibilities of innovation and development of digital journalism. Methodology: In this study, and from the methodology proposed by Rodríguez, Codina and Pedraza (2012), we have analysed the management of interactivity in the main digital media in Mexico, Colombia and Ecuador in 2016. Results and conclusions: The results show a generally low implementation of interactivity options in digital ecosystems in these three Latin American countries. © 2017, University of La Laguna. All rights reserved

Recapturing Joaquín 'Chapo' Guzmán in the Mexican Press: An Analysis of the Front Page of El Universal, Reforma, Excélsior, and La Jornada in 2016

This article, whose aim is to know exactly how the headlines of Mexico's four main newspapers have reported on the recapture of Joaquín Guzmán, will show the results of an analysis of the journalistic content of these four Mexican newspapers. These are general papers, which published information on their front page regarding the recapture of the drug trafficker Joaquín 'Chapo' Guzmán. The events took place on January 8, 2016, six months after his escape from Altiplano prison in Mexico. If the escape was spectacular-being from a high-security prison and evidencing collusion of authorities and corruption of the system-the recapture was even more so. Well-known figures, such as actors Kate del Castillo and Sean Penn, were involved, together with a female politician of the Action Nacional Party, thus leading to questioning of the Mexican status quo. Coverage of the recapture was reduced, tending to minimize the impact of the criminal acts and contributing to both fictionalizing and rendering frivolous the figure of Guzmán. © 2018 The author(s)

Recapturing Joaquín 'Chapo' Guzmán in the Mexican Press: An Analysis of the Front Page of El Universal, Reforma, Excélsior, and La Jornada in 2016

This article, whose aim is to know exactly how the headlines of Mexico's four main newspapers have reported on the recapture of Joaquín Guzmán, will show the results of an analysis of the journalistic content of these four Mexican newspapers. These are general papers, which published information on their front page regarding the recapture of the drug trafficker Joaquín 'Chapo' Guzmán. The events took place on January 8, 2016, six months after his escape from Altiplano prison in Mexico. If the escape was spectacular-being from a high-security prison and evidencing collusion of authorities and corruption of the system-the recapture was even more so. Well-known figures, such as actors Kate del Castillo and Sean Penn, were involved, together with a female politician of the Action Nacional Party, thus leading to questioning of the Mexican status quo. Coverage of the recapture was reduced, tending to minimize the impact of the criminal acts and contributing to both fictionalizing and rendering frivolous the figure of Guzmán. © 2018 The author(s)

"Interactivity in Latin American digital journalism. An analysis of the main digital media of Colombia, Mexico and Ecuador (2016)"

"Introduction: Latin America, in general terms, is a continent with several contextual levels, which depend on historic, economic, political and social characteristics. Despite all this, there are aspects -such as digital divide- that occur again, to a greater or lesser extent, in the different Latin American countries. This digital divide promotes partially disconnected -and thus, invisible- societies, and tends to slow down possibilities of innovation and development of digital journalism. Methodology: In this study, and from the methodology proposed by Rodríguez, Codina and Pedraza (2012), we have analysed the management of interactivity in the main digital media in Mexico, Colombia and Ecuador in 2016. Results and conclusions: The results show a generally low implementation of interactivity options in digital ecosystems in these three Latin American countries. © 2017, University of La Laguna. All rights reserved.