oscillatory
51Airy wave theory — In fluid dynamics, Airy wave theory (often referred to as linear wave theory) gives a linearised description of the propagation of gravity waves on the surface of a homogeneous fluid layer. The theory assumes that the fluid layer has a uniform… …
52Defining equation (physics) — For common nomenclature of base quantities used in this article, see Physical quantity. For 4 vector modifications used in relativity, see Four vector. Very often defining equations are in the form of a constitutive equation, since parameters of… …
53Avicennism — (PerB|فلسفه سینایی) is a school of early Islamic philosophy which began during the middle of the Islamic Golden Age. The school was founded by Avicenna (Ibn Sina), an 11th century Persian philosopher who attempted to redefine the course of… …
54Dirac delta function — Schematic representation of the Dirac delta function by a line surmounted by an arrow. The height of the arrow is usually used to specify the value of any multiplicative constant, which will give the area under the function. The other convention… …
55Inverted pendulum — An inverted pendulum is a pendulum which has its mass above its pivot point. It is often implemented with the pivot point mounted on a cart that can move horizontally and may be called a cart and pole. Whereas a normal pendulum is stable when… …
56Norman Foster Ramsey, Jr. — Norman Ramsey redirects here. For the U.S. federal judge (1922–1993), see Norman Park Ramsey. Norman Foster Ramsey, Jr. Born August 27, 1915(1915 08 27) Washington, DC Died …
57Hysteresivity — derives from “hysteresis”, meaning “lag”. It is the tendency to react slowly to an outside force, or to not return completely to its original state. Whereas the area within a hysteresis loop represents energy dissipated to heat and is an… …
58Autogenerator — the single transistor (in the older devices vacuum tube) generator that was commonly used as the local oscillator in the superheterodyne radio receivers.The autogenerator frequency is determined by the oscillatory LC loop with the variable… …
59Singular Spectrum Analysis — The Singular Spectrum Analysis (SSA) techniqueis a powerful technique of time series analysisincorporating the elements of classical time series analysis,multivariate statistics, multivariate geometry, dynamical systemsand signal processing. The… …
60Stokes boundary layer — in a viscous fluid due to the harmonic oscillation of a plane rigid plate. Velocity (blue line) and particle excursion (red dots) as a function of the distance to the wall. In fluid dynamics, the Stokes boundary layer, or oscillatory boundary… …
