These include strange attractors, fractals, and genetic algorithms.
Using concepts and images of flowing fractals helps me to follow a patient's seemingly disjointed reasoning.
Modern instruments are introduced, including laser interferometers and AFM's, and there are sections on fractals and motif analysis.
Teardrop fractals are derivable from cyclically symmetric fractals with a central element.
Whether you're writing a character who is a Civil Rights attorney or a 15 year old kid who just thinks that fractals and prime numbers are the coolest thing ever - it is having passion that makes a character engaging.