Uni-Logo
Sie sind hier: Startseite Seminar Istvan Z. Kiss, Ph.D.

Istvan Z. Kiss, Ph.D.

— abgelegt unter:

Electrochemical oscillations and chaos on macro- and microscales: phase diffusion, synchronization, and pacemaker design

Was
  • FDM-Seminar
Wann 07.06.2010
von 14:00 bis 15:30
Wo Eckerstr.1, Raum 404
Name
Kontakttelefon 0761-2037701
Termin übernehmen vCal
iCal

 

Istvan Z. Kiss
Assistant Professor
Department of Chemistry
Saint Louis University

 

Abstract:


Complex chemical and biological systems exhibit dynamic self-organization with emergent properties depending both on the behavior of the constituent parts and the types and extent of their interactions. We introduce the subject of chemical complexity through the description of macroscale and microscale electrochemical oscillations that occur on multi-particle electrodes.

In the presentation, electrochemical oscillations are described by using the concept of cycle phase and determine how the frequency and precision of the current oscillations on a single electrode depends on resistance and temperature, and how the extent of interactions affects periodic and chaotic synchronization patterns on electrode arrays.

For optimal pacemaker design, a theory for obtaining waveform for the effective entrainment of a weakly forced oscillator is presented. Phase model analysis is combined with calculus of variation to derive a waveform with which entrainment of an oscillator is achieved with minimum power forcing. The theory is tested in chemical entrainment experiments in which oscillations close to and further away from a Hopf bifurcation exhibited sinusoidal and higher harmonic nontrivial optimal waveforms, respectively.

« März 2024 »
März
MoDiMiDoFrSaSo
123
45678910
11121314151617
18192021222324
25262728293031
Benutzerspezifische Werkzeuge