(September 2014). A general sales agent (GSA) is a sales representative for an airline in a specific country or region. Typically, the GSA is responsible for selling all products of the airline in its region which includes flight tickets and cargo space. A GSA will typically sell the product of more than one airline.
Definition of standing wave. : a single-frequency mode of vibration of a body or physical system in which the amplitude varies from place to place, is constantly zero at fixed points, and has maxima at other points.
7.2.4 Standing Waves : The Infinite Square Well. 1  We can construct quantum mechanical standing waves from plane waves traveling in opposite directions as we did in Section 1.5.3 (See Eq. 1.73), 2  The position dependence of a standing wave can be written as a real function.