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    { "id" : "http://dbpedia.org/resource/Averaged_Lagrangian"
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        "http://www.w3.org/2000/01/rdf-schema#comment" : [ "In continuum mechanics, Whitham's averaged Lagrangian method – or in short Whitham's method – is used to study the Lagrangian dynamics of slowly-varying wave trains in an inhomogeneous (moving) medium.The method is applicable to both linear and non-linear systems. As a direct consequence of the averaging used in the method, wave action is a conserved property of the wave motion. In contrast, the wave energy is not necessarily conserved, due to the exchange of energy with the mean motion." ] ,
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