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The group velocity is positive (i.e., the envelope of the wave moves rightward), while the phase velocity is negative (i.e., the peaks and troughs move leftward). The group velocity of a wave is the velocity with which the overall envelope shape of the wave's amplitudes—known as the modulation or envelope of the wave—propagates through space.
Group dynamics is a system of behaviors and psychological processes occurring within a social group (intragroup dynamics), or between social groups (intergroup dynamics). The study of group dynamics can be useful in understanding decision-making behaviour, tracking the spread of diseases in society, creating effective therapy techniques, and ...
It suggests that group development and success can be best understood by taking into account components found at all levels of analysis. Group behavior can be broken down into 3 levels of analysis: the individual level (micro), the group level (meso) and the organizational or societal level (macro).
The ego perceives a significant similarity with others in the group and identifies with them. In addition, admiration and idealization of the leader of the group takes place through the process of idealization. The narcissistic libido is displaced to the object which is "loved because of its perfection which the individual has sought for his ...
Phase and group velocity divided by 4 √ gσ / ρ as a function of inverse relative wavelength 1 / λ √ σ / ρg. Blue lines (A): phase velocity c p, Red lines (B): group velocity c g. Drawn lines: gravity–capillary waves. Dashed lines: gravity waves. Dash-dot lines: pure capillary waves. Note: σ is surface tension in this graph.
The overall group velocity is positive, and the wave packet moves as it disperses. The inverse Fourier transform is still a Gaussian, but now the parameter a has become complex, and there is an overall normalization factor.
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The principles of grouping (or Gestalt laws of grouping) are a set of principles in psychology, first proposed by Gestalt psychologists to account for the observation that humans naturally perceive objects as organized patterns and objects, a principle known as Prägnanz. Gestalt psychologists argued that these principles exist because the mind ...