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In a cross-sectional, electrophysiological study 91 workers of a big car factory performed a series of switch tasks to assess their cognitive control functions. Four groups of workers participated in the study: 23 young and 23 middle aged assembly line employees and 22 young and 23 middle aged employees with flexible job demands like service and(More)
Drowsiness and increased tendency to fall asleep during daytime is still a generally underestimated problem. An increased tendency to fall asleep limits the efficiency at work and substantially increases the risk of accidents. Reduced alertness is difficult to assess, particularly under real life settings. Most of the available measuring procedures are(More)
We consider a model of active Brownian agents interacting via a harmonic attractive potential in a two-dimensional system in the presence of noise. By numerical simulations, we show that this model possesses a noise-induced transition characterized by the breakdown of translational motion and the onset of swarm rotation as the noise intensity is increased.(More)
Active Brownian Particles are self-propelled particles that move in a dissipative medium subject to random forces, or " noise ". Additionally, they can be confined by an external field and/or they can interact with one another. The external field may actually be an attractive marker, for example a light field (as in the experiment) or an energy potential or(More)
Work ability of elderly managers may decrease probably due to a decreased cognitive flexibility. Moreover, cardiovascular reactivity to changing task demands might be less efficient in elderly. Younger (36-45 years) and elderly (49-60 years) German managers had to perform a switching task when they had to switch continuously between different rules of(More)
We consider a three-dimensional model of active Brownian particles interacting via a Morse-type potential. The system exhibits two modes of motion: translation and a coherent rotation in a torus-shape structure. We observe noise-induced transitions in both directions between the two states. These occur at different noise intensities, thus leading to a(More)
The Mismatch Negativity (MMN), an index of auditory stimulus representation, was studied in a design of simultaneous auditory and visual stimulus presentation. A counting task drew the attention of participants to picture presentation and was unrelated to the occurring sounds. With the picture of a hammer hitting a nail a standard sound "bang" came along.(More)
As a rough model for the collective motions of cells and organisms we develop here the statistical mechanics of swarms of self-propelled particles. Our approach is closely related to the recently developed theory of active Brownian motion and the theory of canonical-dissipative systems. Free motion and motion of a swarms confined in an external field is(More)
We study a one-dimensional ring chain of length L with N particles interacting via Morse potentials and influenced by dissipative forces (passive and active friction). We show that by negative friction the system can be driven far from the thermodynamic equilibrium states. For over-critical pumping with free energy several types of coherent motions(More)