Abstract: An archive of activity data has actions associated with individual unique identifiers. Reporting cycles are defined. Activity data in each reporting cycle is analyzed. Lookback windows covering various segments of activity data are defined. Unpopulated repeater cohort lists and an unpopulated single instance cohort list are populated by grouping unique identifiers associated with similar localized repetitive activity relative to each reference event to form populated repeater cohort lists and a populated single instance cohort list. For each reporting cycle it is validated that each cohort list is mutually exclusive. The populated repeater cohort lists and the populated single instance cohort list are utilized as organizing keys to enable discriminatory parsing and analyzing of ancillary attributes to form output data. The output data is appended to the archive.

Abstract: A radio frequency positioning system is described that determines identity and positional data of numerous objects. The system includes a plurality of spread spectrum radio transceivers where at least one transceiver is positioned on each of the numerous objects. At least three spread spectrum radio transceivers transmit to and receive signals from the plurality of radio transceivers. A signal processor is coupled to the spread spectrum radio transceivers and determines the identity and the positional data of the objects.

Abstract: The invention relates to electrically controlled switching devices in which a movable member can occupy at least two stable positions. The invention has for its object to provide a switching device in which the movable member is a dielectric body having received a persistent electric charge. This body can occupy stable positions defined on an insulating support by conductive pads. The switching is produced by a potential difference applied between the conductive pads.