Synchronization of Two-Frequency Self-Sustained Oscillations

2014 ◽  
pp. 245-271
Author(s):  
Vadim S. Anishchenko ◽  
Tatyana E. Vadivasova ◽  
Galina I. Strelkova
Keyword(s):  
Sustained Oscillations

Bifurcation in a Simple Model of the Cardiovascular System

2000 ◽  
Vol 39 (02) ◽  
pp. 118-121 ◽  
Author(s):  
S. Akselrod ◽  
S. Eyal
Keyword(s):  
Nonlinear Dynamics ◽  
Blood Pressure ◽  
Heart Rate ◽  
Fixed Point ◽  
Cardiovascular System ◽  
Modified Model ◽  
Mayer Waves ◽  
Sustained Oscillations ◽  
Human Cardiovascular System ◽  
Physiological Values

Abstract:A simple nonlinear beat-to-beat model of the human cardiovascular system has been studied. The model, introduced by DeBoer et al. was a simplified linearized version. We present a modified model which allows to investigate the nonlinear dynamics of the cardiovascular system. We found that an increase in the -sympathetic gain, via a Hopf bifurcation, leads to sustained oscillations both in heart rate and blood pressure variables at about 0.1 Hz (Mayer waves). Similar oscillations were observed when increasing the -sympathetic gain or decreasing the vagal gain. Further changes of the gains, even beyond reasonable physiological values, did not reveal another bifurcation. The dynamics observed were thus either fixed point or limit cycle. Introducing respiration into the model showed entrainment between the respiration frequency and the Mayer waves.

Impinging planar jets: hysteretic behaviour and origin of the self-sustained oscillations

2021 ◽  
Vol 913 ◽  
Author(s):  
Alessandro Bongarzone ◽  
Arnaud Bertsch ◽  
Philippe Renaud ◽  
François Gallaire
Keyword(s):  
The Self ◽  
Hysteretic Behaviour ◽  
Sustained Oscillations

Abstract

Aeroacoustic computation of cavity flow in self-sustained oscillations

2003 ◽  
Vol 17 (4) ◽  
pp. 590-598
Author(s):  
Sung-Ryong Koh ◽  
Yong Cho ◽  
Young J. Moon
Keyword(s):  
Cavity Flow ◽  
Sustained Oscillations

Simple conditions for the appearance of sustained oscillations in continuous crystallizers

1983 ◽  
Vol 38 (10) ◽  
pp. 1675-1681 ◽  
Author(s):  
G.R. Jerauld ◽  
Y. Vasatis ◽  
M.F. Doherty
Keyword(s):  
Sustained Oscillations

scholarly journals Activation of Cdc42 is necessary for sustained oscillations of Ca2+ and PIP2 stimulated by antigen in RBL mast cells

Biology Open ◽  
2014 ◽  
Vol 3 (8) ◽  
pp. 700-710 ◽  
Author(s):  
M. M. Wilkes ◽  
J. D. Wilson ◽  
B. Baird ◽  
D. Holowka
Keyword(s):  
Mast Cells ◽  
Sustained Oscillations

Self-sustained oscillations in a Helmholtz-like resonator. II - Detailed flow measurements and numerical simulations

2001 ◽  
Author(s):  
S. Dequand ◽  
S. Hulshoff ◽  
H. van Kuijk ◽  
J. Willems ◽  
A. Hirschberg
Keyword(s):  
Numerical Simulations ◽  
Flow Measurements ◽  
Sustained Oscillations

Prediction and Observation of Sustained Oscillations in a Sheared Liquid Crystalline Polymer

2003 ◽  
Vol 90 (9) ◽  
Author(s):  
M. Grosso ◽  
S. Crescitelli ◽  
E. Somma ◽  
J. Vermant ◽  
P. Moldenaers ◽  
...  
Keyword(s):  
Liquid Crystalline Polymer ◽  
Liquid Crystalline ◽  
Crystalline Polymer ◽  
Sustained Oscillations
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