Download Nonlinear Dynamics in Human Behavior by Armin Fuchs (auth.), Raoul Huys, Viktor K. Jirsa (eds.) PDF

By Armin Fuchs (auth.), Raoul Huys, Viktor K. Jirsa (eds.)

Humans interact in a doubtless never-ending number of varied behaviors, of which a few are came across throughout species, whereas others are conceived of as more often than not human. most widely, habit comes approximately in the course of the interaction of assorted constraints – informational, mechanical, neural, metabolic, etc – working at a number of scales in house and time. through the years, consensus has grown within the study group that, instead of investigating habit merely from backside up, it can be additionally good understood by way of ideas and legislation at the phenomenological point. Such best down strategy is rooted in theories of synergetics and self-organization utilizing instruments from nonlinear dynamics. the current compendium brings jointly scientists from around the globe that experience contributed to the advance in their respective fields departing from this heritage. It offers an advent to deterministic in addition to stochastic dynamical platforms and comprises purposes to motor keep watch over and coordination, visible belief and phantasm, in addition to auditory belief within the context of speech and music.

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If, by the process of stochastic resonance, x Q Fig. 3 Left panel: example of a bimodal potential (solid line) that is tilted (dashed and dasheddotted lines) reflecting a periodic forcing. Right panel: Non-monotonic change in signal-tonoise ratio dependent on the noise strength. In a linear system one would find a monotonic decrease in the signal-to-noise ratio; see text for further details. Analyzing Noise in Dynamical Systems 49 presenting noise to the mechanoreceptors improves the detectability of plantar tactile stimuli, this could facilitate postural control and therefore increase postural stability.

Fig. 23 Potential functions for a saddle (42) (left) and for the example given by (46) (right). Equipotential lines are plotted in white and a set of trajectories in black. As the trajectories follow the negative gradient of the potential they intersect the lines of equipotential at a right angle. It is easy to figure out whether a specific two-dimensional system is a gradient system and can be derived from a scalar potential function. A theorem states that a potential exists if and only if the relation ∂ f (x, y) ∂ g(x, y) = ∂y ∂x (44) is fulfilled.

With increasing input noise signal-to-noise ratio increases to some peak and subsequently decreases. Here, the phenomenon of stochastic resonance is illustrated using the example of the aforementioned bimodal potential in the presence of noise and a periodic external force; see Fig. 3. Explicitly, this bistable dynamics can read 48 A. Daffertshofer dV ξ˙ = − + A sin Ω t + dξ ε 1 2QΓ (t) with V (x) = − x2 + x4 2 4 (28) with a corresponding diffusion equation like p˙ (x,t) = ∂ ∂x dV ∂2 − A sin Ω t p (x,t) + Q 2 p (x,t) .

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