<unk> ic behavior has been observed in the laboratory in a variety of systems including electrical circuits, lasers, oscillating chemical reactions, fluid dynamics, and mechanical and magneto-mechanical devices. Observations of<unk> ic behaviour in nature include the dynamics of satellites in the solar system, the time evolution of the  magnetic field of celestial bodies, population growth in ecology, the dynamics of the action potentials in neurons, and molecular vibrations. Everyday examples of<unk> ic systems include weather and climate. There is some controversy over the existence of<unk> ic dynamics in the plate tectonics and in economics.  
Systems that exhibit mathematical<unk>  are deterministic and thus orderly in some sense; this technical use of the word<unk>  is at odds with common parlance, which suggests complete disorder. A related field of physics called quantum<unk>  studies systems that follow the laws of quantum mechanics. Recently, another field, called relativistic<unk> , has emerged to describe systems that follow the laws of general relativity.
As well as being orderly in the sense of being deterministic,<unk> ic systems usually have well defined statistics. For example, the Lorenz system pictured is<unk> ic, but has a clearly defined structure. Bounded<unk>  is a useful term for describing models of disorder.
Chaos theory
Hebbian theory
Affect control theory
Attachment theory
James-Lange theory
Analytical psychology
Mind–body intervention
Reward system