Felix M. Schneider

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The onset of pulse propagation is studied in a reaction-diffusion (RD) model with control by augmented transmission capability that is provided either along nonlocal spatial coupling or by time-delayed feedback. We show that traveling pulses occur primarily as solutions to the RD equations, while augmented transmission changes excitability. For certain(More)
The stability of cortical function depends critically on proper regulation. Under conditions of migraine and stroke a breakdown of transmembrane chemical gradients can spread through cortical tissue. A concomitant component of this emergent spatio-temporal pattern is a depolarization of cells detected as slow voltage variations. The propagation velocity of(More)
Spatio-temporal excitation patterns in various neurological disorders constitute examples of excitable behaviour emerging from pathological pathways. During migraine, seizure, and stroke, an initially localized pathological state can start to spread indicating a transition from unexcitable to excitable media. We investigate this transition in the generic(More)
Nurses' attitudes toward three types of oral liquid unit dose packages--glass, plastic and aluminum--were determined. Thirty nurses who previously had not used unit dose packaging on their units were asked to evaluate the three types of packaging. The nurses preferred both aluminum and plastic over the glass containers; there was no significant difference(More)
Transient wave forms in neural networks with diffusive and nonlocal coupling have attracted particular interest because they may mediate recruitment of healthy cortical tissue into a pathological state during migraine. To investigate this process, we use a reaction-diffusion system of inhibitor-activator type as a generic model of pathological wave(More)
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