MIDIT OFD CATS Modelling, Nonlinear Dynamics Optics and Fluid Dynamics Chaos and Turbulence Studies and Irreversible Thermodynamics Risø National Laboratory Niels Bohr Institute and Technical University of Denmark Building 128 Department of Chemistry Building 321 P.O. Box 49 University of Copenhagen DK-2800 Lyngby DK-4000 Roskilde DK-2100 Copenhagen Ø Denmark Denmark Denmark
by Dr. Meir Lewkowicz
Dept. of Physics
College of Judea and Samaria
Thursday, February 15, 2001, 14.00 h
at IMM, Building 305, Room 018, DTU
Abstract: In the analysis of complex systems (as the autonomic nervous system that governs the heart rate) one often presents the data in the form of recurrence or phase space plots. We demonstrate a new way to analyze such systems by the multipole expansion of the gravitational potential of the two-dimensional phase-space plot, where the density of points determines the mass density. We apply our approach to the heart beat interval series and find the the new measure is more effective than the traditional measures applied in research and clinics.