Disclosed are systems and methods for processing events in an event stream using a map-update application. The composition includes a glass frit, a binder, a dispersant, a plasticizer, and a solvent. For certain identifiable portions of the view, a callable function may be created that returns a set of indicia maps indicating which objects in the portions are annotated. 01 to 1 wt % of fluoric acid, 20 to 50 wt % of oxidizer and 50 to 80 wt % of water. The first spectral element is placed at the front focal point of a first lens, the reflecting member is placed at a position where the back focal point of the first lens coincides with the front focal point of a second lens, and the second spectral element is placed at the back focal point of the second lens. The audio display can also include a phase output plotted in the phase zone between the respective pair of amplitude elements, the phase output representing a phase relationship between the given pair of the audio channels.