One can think of this random motion as introducing "white noise" into the system.
Rusted machinery scattered on the grounds would be set in random motion for no apparent purpose.
Since the molecules are in random motion, this result is independent of the choice of axis.
But the equations of thermodynamics, which describe the collective random motion of many trillions of particles, do contain a definite direction of time.
PAGE D7 OBITUARIES KIYOSHI ITO, 93 A mathematician, he created innovative models of random motion that are used today in fields as diverse as finance and biology.
Because it includes a white-noise term to describe the random motion of the molecules, the KPZ equation is a stochastic PDE.
In the direction perpendicular to the solar wind, the random motion of the solar-wind particles exerts a small pressure on the magnetic field, constricting the magnetosphere slightly.
An example of a fluctuation phenomenon is the random motion of small particles suspended in a fluid, known as Brownian motion.
Strong paramagnetism decreases with rising temperature because of the de-alignment produced by the greater random motion of the atomic magnets.
In the absence of the junction-forming layers, these "free" electrons are in random motion, and so there can be no oriented direct current.
During the late 1820s Brown discovered, with the aid of a microscope, that minute particles suspended in a liquid are in continual, random motion.
