Simple molecules as complex systems

Simple molecules as complex systems

For individual molecules quantum mechanics (QM) offers a simple, natural and elegant way to build large-scale complex networks: quantized energy levels are the nodes, allowed transitions among the levels are the links, and transition intensities supply the weights. QM networks are intrinsic properties of molecules and they are characterized experimentally via spectroscopy; thus, realizations of...

Simple Models of Complex Systems

The range of phenomena addressed by physicists in trying to understand nature is very wide. In length scales, it varies from the Planck scale ( about 10 meters), to the size of the universe ( ∼ 10 meters). In time scales from 10 seconds to billions of years. The enormity of this range is somewhat mind-boggling. While the problems of understanding ultra-short and very-large length scales are cer...

Complex Behavior of Simple Systems

Since the seminal work of Lorenz [1963] and Rössler [1976], it has been known that complex behavior (chaos) can occur in systems of autonomous ordinary differential equations (ODEs) with as few as three variables and one or two quadratic nonlinearities. Many other simple chaotic systems have been discovered and studied over the years, but it is not known whether the algebraically simplest chaot...

Complex fuzzy linear systems

Beyond Simple Classifications: Contemporary Information Systems Development Projects as Complex Adaptive Systems

Contemporary Information Systems Development (ISD) takes place in a dynamic environment and is generally acknowledged as a complex activity. We investigate whether complex adaptive systems (CAS) theory is relevant as a theoretical foundation for understanding ISD, and if so, what kind of conception can be achieved by utilizing the theory? We introduce key CAS concepts and describe an emergent m...