Assertion: perturbation | /r/HasProperty | concentrated at point
Facets:
value: in a finite volume of space
type: LOCATION
Source sentences:
text: The perturbation may be concentrated at a point or in a finite volume of space; it may be a wave (sine or cosine function); in the case of a rotating system, it may be symmetric about the axis of rotation; or it may be a displacement by the parcel method .