A processing apparatus supports a narrowing-and-rounding arithmetic operation which generates, in response to two operands each comprising at least one W-bit data element, a result value comprising at least one X-bit result data element, with each X-bit result data element representing a sum or difference of corresponding W-bit data elements of the two operands rounded to an X-bit value. One embodiment of a method for facilitating creation of an annotated media stream by a user includes receiving the media stream from the user, mapping at least one item of supplemental content to at least a portion of the media stream to produce the annotated media stream, and storing the annotated media stream. or higher and contain a PVDF-based resin. At least one contact is formed through the second insulating layer and electrically connected to the conductive structure. An air ionizing element composed of an ion emitter and an air knife is arranged in the enclosure for electrostatically neutralizing the object with ions entrained in a curtain-like stream of air directed onto the object. The preliminary molding is then subjected to sintering under no pressure in vacuum.