A usage data collection and evaluation mechanism may collect usage information from various sources and summarize the usage information to determine a role for a system. The method is implemented on a computing infrastructure and includes querying one or more databases for matching information of a third party that is associated with one or more mobile devices that pass within a predefined location at one or more predefined intervals. Some of the compounds fluoresce at three wavelengths, emitting white light. The invention is further directed to a multi-layer article comprising the aromatic polyimide nanoweb with amide-modified surface, and to an electrochemical cell comprising the multi-layer article. A trellis search procedure is employed to reconstruct estimates of a received signal sequence based on a reduced number of states. As the debris enters the first hopper, the heavier material settles and lighter, entrained material is directed through a filter element and onto a second hopper or bin.