Jamming, or dynamical arrest, is a transition at which many particles stop moving in a collective manner. In nature it is brought about by, for example, increasing the packing density, changing the interactions between particles, or otherwise restricting the local motion of the elements of the system. The onset of collectivity occurs because, when one particle is blocked, it may lead to the blo...

Most processing stages theorists assume that response selection processes are largely autonomous from earlier perceptual analysis of information. We report findings that challenge this assumption and suggest that a much more complex interaction exists between perception and action. Specifically our study demonstrates that the initial analysis of visual objects into features from different dimen...

Recent research has relied on trolley-type sacrificial moral dilemmas to study utilitarian versus nonutilitarian modes of moral decision-making. This research has generated important insights into people's attitudes toward instrumental harm-that is, the sacrifice of an individual to save a greater number. But this approach also has serious limitations. Most notably, it ignores the positive, alt...

We study theoretically the kinetics of the diffusion-limited reaction A+A-+O in the steady state. We consider the effect of an external source which adds correlated pairs of particles. We show that in dimensions below 2 and in the low-density limit spatial self-organization of reactants occurs and is controlled by the correlation in the source term. At higher densities there is a crossover to a...

introduction: job stress can result from an imbalance between job demands and the abilities to cope them. stress can affect individuals and lead to job dissatisfaction. this study was conducted to assess the influence of different job stress dimensions on job satisfaction in workers of a refinery control room located at the south of iran. materials & methods: in this cross sectional study all 1...