Abstract: A computer-implemented method and system perform key moment-based snippet creation. The method comprises locating, automatically via at least one processor, a key moment of a call in a representation of the call and creating, automatically via the at least one processor, a snippet of the representation of the call based on the key moment located. The snippet includes the key moment and context for the key moment. The context includes a lead portion and a lag portion. The lead portion precedes the key moment, and the lag portion follows the key moment in the representation of the call. The key moment may be an utterance identified by an artificial (AI) model as having a positive or negative impact on an outcome effectuated by the call. The snippet, including the key moment, may serve as a learning tool to coach a user in a manner that improves an outcome of a next call. Such coaching may be referred to as AI-driven coaching.

Abstract: A phase shifter for microwave electromagnetic energy propagating through a waveguide has a composite structure of a series of capacitive phase shifting posts positioned within the waveguide diametrically across from a symmetrically tapered ridge. The series of posts introduce a nominal value of phase shift with an incremental value which increases with increasing frequency of the electromagnetic energy. The tapered ridge introduces a nominal value of phase shift plus an incremental value which decreases with increasing frequency of the electromagnetic energy. The rates of increase and decrease of the incremental values of phase shift cancel so as to provide a resultant phase shift which is substantially invariant with frequency.