Trains, tails and loops of partially adsorbed semi-flexible filaments

Polymer adsorption is a fundamental problem in statistical mechanics that has direct relevance to diverse disciplines ranging from biological lubrication to stability of colloidal suspensions. We combine experiments with computer simulations to investigate depletion induced adsorption of semi-flexible polymers onto a hard-wall. Three dimensional filament configurations of partially adsorbed F-actin polymers are visualized with total internal reflection fluorescence microscopy. This information is used to determine the location of the adsorption/desorption transition and extract the statistics of trains, tails and loops of partially adsorbed filament configurations. In contrast to long flexible filaments which primarily desorb by the formation of loops, the desorption of stiff, finite-sized filaments is largely driven by fluctuating filament tails. Simulations quantitatively reproduce our experimental data and allow us to extract universal laws that explain scaling of the adsorption-desorption transition with relevant microscopic parameters. Our results demonstrate how the adhesion strength, filament stiffness, length, as well as the configurational space accessible to the desorbed filament can be used to design the characteristics of filament adsorption and thus engineer properties of composite biopolymeric materials

News consumption and its unpleasant side effect:Studying the effect of hard and soft news exposure on mental well-being over time

Following the news is generally understood to be crucial for democracy as it allows citizens to politically participate in an informed manner; yet, one may wonder about the unintended side effects it has for the mental well-being of citizens. With news focusing on the negative and worrisome events in the world, framing that evokes a sense of powerlessness, and lack of entertainment value, this study hypothesizes that news consumption decreases mental well-being via negative hedonic experiences; thereby, we differentiate between hard and soft news. Using a panel survey in combination with latent growth curve modeling (n = 2,767), we demonstrate that the consumption of hard news television programs has a negative effect on the development of mental well-being over time. Soft news consumption, by contrast, has a marginally positive impact on the trend in well-being. This can be explained by the differential topic focus, framing and style of soft news vis-à-vis hard news. Investigating the effects of news consumption on mental well-being provides insight into the impact news exposure has on variables other than the political ones, which definitively are not less societally relevant

To Credit or to Blame? The Asymmetric Impact of Government Responsibility in Economic News

This article studies the asymmetric effects of credit and blame attributions in economic news on government evaluations. We rely on a dataset combining a manual content analysis of Dutch economic news (print, television, online; N = 5,630) with a three-wave panel survey (N = 3,240) that was fielded in 2015. Results show that people who are exposed to news in which the government is blamed for the economy tend to adopt this frame by assigning responsibility to the government for the economic crisis. In addition, exposure to blame attributions leads to more negative government evaluations. This effect is partly mediated through the attribution of crisis responsibility. Credit attributions in the news do not have any effect on public opinion

Taking it personal or national? Understanding the indirect effects of economic news on government support

This article studies the impact of economic news on government support and the mediating role of people’s national (sociotropic) and personal (egotropic) economic evaluations. Employing two complementary studies, a large literature is contributed to by adding a media perspective to the economic voting hypothesis. The first study was fielded in 2015 and combines an extensive content analysis of economic news (print, television, online; N = 5,630) with a three-wave panel survey (N = 3,240). As a follow-up, an experiment was conducted in 2018 exposing participants (N = 1,452) to negative and positive economic news. Both studies confirm that the tone of news directly affects national economic evaluations but not personal ones. Whereas both types of evaluation predict government support, the effect of national evaluations is significantly stronger. Most importantly, it is shown that the effect of national evaluations on government support is actually a mediation of the effect of economic news