Abstract: Systems and methods for tracking assets from central stations using tracking devices enabled to receive GPS coordinates or site identities broadcast from transmitters at fixed locations within a wireless network. Plural position fixes are taken over time and forwarded to the central station. The position fixes are compared to establish a likelihood that apparent excursions from a predetermined boundary area are valid or not, prior to generating an alert signal that the asset has moved from the boundary area.

Abstract: A method for recommending items to users using automated collaborative filtering stores profiles of users relating ratings to items in memory. Profiles of items may also be stored in memory, the item profiles associating users with the rating given to the item by that user or inferred for the user by the system The user profiles include additional information relating to the user or associated with the rating given to an item by the user. Similarity factors with respect to other users, and confidence factors associated with the similarity factors, are calculated for a user and these similarity factors, in connection with the confidence factors, are used to select a set of neighboring users. The neighboring users are weighted based on their respective similarity factors, and a rating for an item contained in the domain is predicted. In one embodiment, items in the domain have features.