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The fifth-wave of economic development began in the 1990s with a two-fold interest in providing market solutions and regional strategies for development. The idea of a comparative advantage has been integral to the development of the fifth-wave. This wave has been marked by economic developers who work to emphasize unmet demand, function as a ...
Diagram based on the Wave model originally presented by Johannes Schmidt. In this Euler diagram, the circles are to be regarded as diachronic; that is, they increase in diameter over time, like the concentric waves on a water surface struck by a stone. The background represents a dialect continuum of no language boundaries. The circles are ...
In Smihula theory technological revolutions are the main engine of economic development, and hence long-term economic cycles are dependent on these waves of technological innovation. [7] Smihula identified during the modern age in society six waves of technological innovations begun by technological revolutions (one of them is a hypothetical ...
The development of the multiple sequence model stemmed from Poole finding stage models to be too linear based on systematized logic. [1] Poole believed that decisions are based on many different activities and communication, this differing from the previous stage models other theorists were following.
Long wave theory is not accepted by many academic economists. However, it is important for innovation-based, development and evolutionary economics. Yet, among economists who accept it, there has been no formal universal agreement about the standards that should be used universally to place the start and end years for each wave.
In Bonn he published the work Die Verwandtschaftsverhältnisse der indogermanischen Sprachen ('The Relationships of the Indo-Germanic Languages', 1872), which presented his Wellentheorie ('wave theory'). According to this theory, new features of a language spread from a central area in continuously weakening concentric circles, similar to the ...
Here ψ is the angle between the path of the wave source and the direction of wave propagation (the wave vector k), and the circles represent wavefronts. Consider one of the phase circles of Fig.12.3 for a particular k, corresponding to the time t in the past, Fig.12.2. Its radius is QS, and the phase chevron side is the tangent PS to it.
The phase velocity varies with frequency. The phase velocity is the rate at which the phase of the wave propagates in space. The group velocity is the rate at which the wave envelope, i.e. the changes in amplitude, propagates. The wave envelope is the profile of the wave amplitudes; all transverse displacements are bound by the envelope profile.