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The Elliott wave principle, or Elliott wave theory, is a form of technical analysis that financial traders use to analyze financial market cycles and forecast market trends by identifying extremes in investor psychology and price levels, such as highs and lows, by looking for patterns in prices. Ralph Nelson Elliott (1871–1948), an American ...
In political science, the waves of democracy or waves of democratization are major surges of democracy that have occurred in history. Although the term appears at least as early as 1887, [1] it was popularized by Samuel P. Huntington, a political scientist at Harvard University, in his article published in the Journal of Democracy and further expounded in his 1991 book, The Third Wave ...
Wave. Surface waves in water showing water ripples. In physics, mathematics, engineering, and related fields, a wave is a propagating dynamic disturbance (change from equilibrium) of one or more quantities. Periodic waves oscillate repeatedly about an equilibrium (resting) value at some frequency. When the entire waveform moves in one direction ...
45–60. This box: view. talk. edit. In economics, Kondratiev waves (also called supercycles, great surges, long waves, K-waves or the long economic cycle) are hypothesized cycle-like phenomena in the modern world economy. [ 1] The phenomenon is closely connected with the technology life cycle. [ 2] It is stated that the period of a wave ranges ...
General definition (allows for FM): = / For non-FM waves this reduces to: = / In practice N is set to 1 cycle and t = T = time period for 1 cycle, to obtain the more useful relation: = / Hz = s −1 [T] −1
The wave equation of quantum mechanics is first order in the time; therefore, Huygens’ principle is correct for matter waves, action replacing time." This clarifies the fact that in this context the generalized principle reflects the linearity of quantum mechanics and the fact that the quantum mechanics equations are first order in time.
The period (symbol T) is the interval of time between events, so the period is the reciprocal of the frequency: T = 1/f. [ 2 ] Frequency is an important parameter used in science and engineering to specify the rate of oscillatory and vibratory phenomena, such as mechanical vibrations, audio signals ( sound ), radio waves , and light .
The light circles represent atoms. In condensed matter physics, Bloch's theorem states that solutions to the Schrödinger equation in a periodic potential can be expressed as plane waves modulated by periodic functions. The theorem is named after the Swiss physicist Felix Bloch, who discovered the theorem in 1929. [ 1]