Search Results - "Engel, Harald"

Spiral wave chimera states in large populations of coupled chemical oscillators by Totz, Jan Frederik, Rode, Julian, Tinsley, Mark R., Showalter, Kenneth, Engel, Harald

“…The coexistence of coherent and incoherent dynamics in a population of identically coupled oscillators is known as a chimera state 1 , 2 . Discovered in 2002 3…”
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An active poroelastic model for mechanochemical patterns in protoplasmic droplets of Physarum polycephalum by Radszuweit, Markus, Engel, Harald, Bär, Markus

“…Motivated by recent experimental studies, we derive and analyze a two-dimensional model for the contraction patterns observed in protoplasmic droplets of…”
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Spatial confinement causes lifetime enhancement and expansion of vortex rings with positive filament tension by Totz, Jan Frederik, Engel, Harald, Steinbock, Oliver

“…We study the impact of spatial confinement on the dynamics of three-dimensional (3D) excitation vortices with circular filaments. In a chemically active medium…”
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Active poroelastic two-phase model for the motion of physarum microplasmodia by Kulawiak, Dirk Alexander, Löber, Jakob, Bär, Markus, Engel, Harald

“…The onset of self-organized motion is studied in a poroelastic two-phase model with free boundaries for Physarum microplasmodia (MP). In the model, an active…”
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Control of transversal instabilities in reaction-diffusion systems by Totz, Sonja, Löber, Jakob, Totz, Jan Frederik, Engel, Harald

“…In two-dimensional reaction-diffusion systems, local curvature perturbations on traveling waves are typically damped out and vanish. However, if the inhibitor…”
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The neutrophil-to-lymphocyte ratio (NLR) after surgery for hip fracture (HF) by Forget, Patrice, Moreau, Nicolas, Engel, Harald, Cornu, Olivier, Boland, Benoît, De Kock, Marc, Yombi, Jean-Cyr

“…Highlights • We studied the NLR in HF. • Age, male gender and multiple comorbidities (MCM) are confirmed as mortality risk factors. • The NLR is an additional…”
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Chimera States on a Ring of Strongly Coupled Relaxation Oscillators by Rode, Julian, Totz, Jan Frederik, Fengler, Enrico, Engel, Harald

“…Weakly coupled oscillators can exhibit seemingly incongruous synchronization patterns comprised of coherent and incoherent spatial domains known as chimera…”
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Anomalous dispersion in the Belousov–Zhabotinsky reaction: Experiments and modeling by Bordyugov, Grigory, Fischer, Nils, Engel, Harald, Manz, Niklas, Steinbock, Oliver

“…We report results on dispersion relations and instabilities of traveling waves in excitable systems. Experiments employ solutions of the 1,4-cyclohexanedione…”
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Coherence resonance in a chemical excitable system driven by coloured noise by Beato, Valentina, Sendiña-Nadal, Irene, Gerdes, Ingeborg, Engel, Harald

“…We investigate how the temporal correlation in excitable systems driven by external noise affects the coherence of the system's response. The coupling to the…”
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Intracellular mechanochemical waves in an active poroelastic model by Radszuweit, Markus, Alonso, Sergio, Engel, Harald, Bär, Markus

“…Many processes in living cells are controlled by biochemical substances regulating active stresses. The cytoplasm is an active material with both viscoelastic…”
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Reversal of rocuronium-induced fixed pupillary dilation by sugammadex in ICU patients with COVID-19 by Winant, Maxime, Engel, Harald, Dubois, Pauline, Halenarova, Katarina, De Backer, Daniel

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Controlling the position of traveling waves in reaction-diffusion systems by Löber, Jakob, Engel, Harald

“…We present a method to control the position as a function of time of one-dimensional traveling wave solutions to reaction-diffusion systems according to a…”
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Transition from spiral wave chimeras to phase cluster states by Totz, Jan Frederik, Tinsley, Mark R., Engel, Harald, Showalter, Kenneth

“…Photochemically coupled Belousov-Zhabotinsky micro-oscillators are studied in experiments and simulations. Generally good agreement between the experimental…”
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Supernormal conduction in cardiac tissue promotes concordant alternans and action potential bunching by Echebarria, Blas, Röder, Georg, Engel, Harald, Davidsen, Jörn, Bär, Markus

“…Supernormal conduction (SNC) in excitable cardiac tissue refers to an increase of pulse (or action potential) velocity with decreasing distance to the…”
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Creating bound states in excitable media by means of nonlocal coupling by Bordyugov, Grigory, Engel, Harald

“…We consider pulses of excitation in reaction-diffusion systems subjected to nonlocal coupling. This coupling represents long-range connections between the…”
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First-order synchronization transition in a large population of strongly coupled relaxation oscillators by Călugăru, Dumitru, Totz, Jan Frederik, Martens, Erik A, Engel, Harald

“…Onset and loss of synchronization in coupled oscillators are of fundamental importance in understanding emergent behavior in natural and man-made systems,…”
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Shaping wave patterns in reaction-diffusion systems by Löber, Jakob, Martens, Steffen, Engel, Harald

“…We present a method to control the two-dimensional shape of traveling wave solutions to reaction-diffusion systems, such as, interfaces and excitation pulses…”
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On the optimal control of the Schlögl-model by Buchholz, Rico, Engel, Harald, Kammann, Eileen, Tröltzsch, Fredi

“…Optimal control problems for a class of 1D semilinear parabolic equations with cubic nonlinearity are considered. This class is also known as the Schlögl…”
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Serum procalcitonin as a marker of post-cardiac arrest syndrome and long-term neurological recovery, but not of early-onset infections, in comatose post-anoxic patients treated with therapeutic hypothermia by Engel, Harald, Ben Hamouda, Nawfel, Portmann, Katharina, Delodder, Frederik, Suys, Tamarah, Feihl, François, Eggimann, Philippe, Rossetti, Andrea O, Oddo, Mauro

“…Abstract Objective To examine the relationship of early serum procalcitonin (PCT) levels with the severity of post-cardiac arrest syndrome (PCAS), long-term…”
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Continuation of spiral waves by Bordyugov, Grigory, Engel, Harald

“…We describe a new numerical method of computing rigidly rotating spiral waves, which is based on solving the Neumann boundary-value problem for the…”
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