Chaos
- Differential Equations: Lorenz System
Demos of M.C. Cross (CalTech)
Chaos in a chemical system
- Strange attractors, Lyapunov exponents
- Maps
- Logistic Map
Cobweb diagram, period-doubling cascade and chaos, Lyapunov exponents
Experiments in Rayleigh-Benard convection
- Universality and Renormalization
- Cantor Sets and Fractal Dimension
- Diagnostic Tools
Attractor reconstruction, Poincare section, power spectrum
The course uses the textbook Nonlinear Dynamics and Chaos:
With Applications to Physics, Biology, Chemistry and Engineering
by S. Strogatz.
Assignments:
HW 1
HW 2
HW 3
HW 4
HW 5
HW 6
HW 7
HW 8 (postscript)
Take-home final (due Thursday, December 7, 5 p.m.)
Discussion section: We 4-5 in M177
The goal of the discussion section is to provide feed-back for the homework.
Every student will be asked to present their homework at the blackboard and to
explain how the homework to the other students in the class.
The grade will be based on the presentations.
Alex Roxin (a-roxin@nwu.edu) will lead the discussion sections.
MATLAB.There are a number of tutorials and more detailed manuals of MATLAB on the web. A good starting page
is the tutorial from UMD which also
points to more detailed and extensive web resources (.e.g. the tutorial by S. Davis (Rice)). Please note that the current version of Matlab is
5 and it differs in some relevant respects from the older versions 3 and 4.
Template for logistic growth program:
logistic.m
euler.m
Phaseplane program pplane5.m, ppn5out.m by J.C. Polking
Note: to get the orbits in pplane5 over longer times one can choose ode23 and pick a
calculation window that is 10 times larger than the display window.
Program for solving the Swift-Hohenberg model:
sh.m
init.m
default.m
ic.m
go.m
Demo
There will be no class on Tuesday November 21.
The class will be made up by extending the lecture time of the first 5 classes.
Office Hours: Mo Tu Th 5-6 in M458
Seminars
The following seminars will be of interest to students in this class:
Interdisciplinary Seminar in Nonlinear Science
on Fridays at 2pm in M416.
Graduate Student Seminar Tuesdays at 4:30 in M416.
Both seminars are part of the IGERT Program
Dynamics of Complex Systems in Engineering and Science