Abstract: The present invention includes relational Bayesian network-based tracking methods. Various, distinct embodiments of the present invention include tracking methods for: real-time relational tracking of e-commerce segmentation and personalization, in-residence tracking of elderly and disabled people, real-time relational tracking for ground target tracking, and real-time relational tracking of satellites and satellite constellations.

Abstract: In one method and apparatus for blocking unwanted calls in a callback system, parameters associated with a callback request (e.g., the user device to which the call is to be directed, the IP address from which the request originated or an identifier of the source computer from which the callback request originated, the party from whom the call is requested) are tracked for each call. A decision to automatically block the requested callback is made based on one or more criteria based on a combination of these parameters, which may be a total over a period of time. In a second method, one or both of the parties to the callback is queried as to whether the callback is unwanted and, if so, one or more parameters associated with the request are blacklisted.

Abstract: A method and apparatus for calculating a score for word selection, which may be used to preprocess sets of words prior to a dimensionality reduction process, employs information about relationships between words themselves (such as synonym relationships) or relationships between items with which the words are associated (such as products in a catalog). In some embodiments, the relationships are also community based; i.e., the relationships are established by a community of users. The relationships may be references to two or more word sets in which the word of interest is common. In one embodiment, the word sets are descriptions of products in an online catalog, the community is the group of people who view the catalog, and the relationships used for calculating the score for a particular word of interest are coreferences (e.g., viewing or purchasing) of pairs of products for which the catalog descriptions both include the particular word.