Dynamics

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Dynamics (from Greek δυναμικός - dynamikos "powerful", from δύναμις - dynamis "power") may refer to:

Physics and engineering

Dynamics (mechanics),
- Aerodynamics, the study of gases in motion
- Analytical dynamics, the motion of bodies as induced by external forces
- Anomalous dynamics (Random walk#Anomalous diffusion), the stochastic motion of objects with mean squared displacement (MSD) that deviates from the relation for normal dynamics, MSD~t, where t is the time the process is seen; anomalous dynamics are either faster than normal dynamics (MSD>t) or slower (MSD<t)
- Brownian dynamics, the occurrence of Langevin dynamics in the motion of particles in solution (e.g. a grain in water, as was first seen by Brown); its famous property is: MSD~t, where MSD is the mean squared displacement, and t is the time the process is seen
- File dynamics, stochastic motion of particles in a channel
- Flight dynamics, the science of aircraft and spacecraft design
- Fluid dynamics or hydrodynamics, the study of fluid flow
  - Computational fluid dynamics, a way of studying fluid dynamics using numerical methods
- Fractional dynamics, studies the dynamics with integrations and differentiations of fractional orders (in physics, economics, and related fields)
- Molecular dynamics, the study of motion on the molecular level
- Normal dynamics, is a stochastic motion having a Gaussian probability density function in position with variance MSD that follows, MSD~t, where MSD is the mean squared displacement of the process, and t is the time the process is seen (normal dynamics and Brownian dynamics are very similar; the term used depends on the field)
- Langevin dynamics, a mathematical model for stochastic dynamics; used in modeling molecules, yet also the stock market and other systems
- Quantum chromodynamics, a theory of the strong interaction (color force)
- Quantum electrodynamics, a description of how matter and light interact
- Relativistic dynamics, a combination of relativistic and quantum concepts
- Single file dynamics (also termed file dynamics), the diffusion of particles in a channel
- Stellar dynamics, a description of the collective motion of stars
- System dynamics, the study of the behavior of complex systems
- Thermodynamics, the study of the relationships between heat and mechanical energy

Sociology and psychology

Group dynamics, the study of social group processes especially
Psychodynamics, the study of the underlying psychological forces driving human behaviour
Spiral Dynamics, a social development theory
Social dynamics, the ability of a society to react to changes

Computer science and mathematics

Dynamic data structure, a structure where the data elements may change
Dynamical system, a concept describing a point's time dependency
- Symbolic dynamics, a method to model dynamical systems
Dynamic programming, a method of solving complex problems by breaking them down into simpler steps
Dynamic program analysis, a set of methods for analyzing computer software
Dynamic HTML, an umbrella term for a collection of technologies used together to create interactive and animated web sites
Dynamic web page, a web page with web content that varies based on parameters provided by a user or a computer program

Companies

Arrow Dynamics, roller coaster designer
Boston Dynamics, robot designer
Crystal Dynamics, video game developer
General Dynamics, defence contractor

Other

Dynamics (music), the softness or loudness of a sound or note
Force Dynamics, a semantic concept about how entities interact with reference to force
Microsoft Dynamics, a line of business software
Neural oscillation in the field of neurodynamics, a rhythmic pattern in the brain
Population dynamics, in life sciences, the changes in the composition of a population
Dynamic microphone, a type of microphone
DTA Dynamic, a French ultralight trike wing design