Newspaper competition and content diversity: a comparison of regional media markets in Sweden

This article discusses the relationship between the newspaper market structure in a region and the diversity of local news. It introduces some partial results on studies based on substantial media concentration within two very different regional newspaper markets in the North and in the South of Sweden. The findings suggest that the relationship between newspaper competition and local news diversity is rather complicated. The study gives some support to the thought that ruinous competition sometimes could be as bad for news diversity as monopoly media

Effects of Cutoff Functions of Tersoff Potentials on Molecular Dynamics Simulations of Thermal Transport

Past molecular dynamics studies of thermal transport have predominantly used Stillinger-Weber potentials. As materials continuously shrink, their properties increasingly depend on defect and surface effects. Unfortunately, Stillinger-Weber potentials are best used for diamond-cubic-like bulk crystals. They cannot represent the energies of many metastable phases, nor can they accurately predict the energetics of defective and surface regions. To study nanostructured materials, where these regions can dominate thermal transport, the accuracy of Tersoff potentials in representing these structures is more desirable. Based upon an analysis of thermal transport in a GaN system, we demonstrate that the cutoff function of the existing Tersoff potentials may lead to problems in determining the thermal conductivity. To remedy this issue, improved cutoff schemes are proposed and evaluated

Newspaper competition and content diversity: a comparison of regional media markets in Sweden

This article discusses the relationship between the newspaper market structure in a region and the diversity of local news. It introduces some partial results on studies based on substantial media concentration within two very different regiona newspaper markets in the North and in the South of Sweden. The findings suggest that the relationship between newspaper competition and local news diversity is rather complicated. The study gives some support to the thought that ruinous competition sometimes could be as bad for news diversity as monopoly media.Este artículo trata sobre la relación entre la estructura de mercado regional para los periódicos impresos y la diversidad de las noticias locales. Presenta los resultados parciales de algunos estudios basados en la concentración de medios impresos en dos mercados regionales muy diferentes en el Norte y el Sur de Suecia. Los hallazgos sugieren que la relación entre la competencia entre los diarios y la diversidad de las noticias locales es más bien compleja. El estudio sustenta, asimismo, la idea de que la competencia destructiva en ocasiones puede ser tan negativa para la diversidad en la información como los mercados monopolísticos

Strategy for reliable strain measurement in InAs/GaAs materials from high-resolution Z-contrast STEM images

Geometric phase analysis (GPA), a fast and simple Fourier space method for strain analysis, can give useful information on accumulated strain and defect propagation in multiple layers of semiconductors, including quantum dot materials. In this work, GPA has been applied to high resolution Z-contrast scanning transmission electron microscopy (STEM) images. Strain maps determined from different g vectors of these images are compared to each other, in order to analyze and assess the GPA technique in terms of accuracy. The SmartAlign tool has been used to improve the STEM image quality getting more reliable results. Strain maps from template matching as a real space approach are compared with strain maps from GPA, and it is discussed that a real space analysis is a better approach than GPA for aberration corrected STEM images