Patent application number | Description | Published |
20080201300 | METHOD AND SYSTEM FOR STORING AND ACCESSING LARGE SCALE ONTOLOGIES USING A RELATIONAL DATABASE - A method for providing ontology management that leaves existing instance data stored in a relational database, while virtualizing the existing instance data for accesses originating from an ontology application, wherein the method includes: submitting an ontology application query to an ontology management system; rewriting the ontology application query with a mapping module into a vertical format mapped query; submitting the vertical format mapped query and view definitions to a database query processor; retrieving relevant existing instance data from the relational database in response to request from the database query processor; and virtualizing the retrieved relevant existing instance data for use by the ontology application. | 08-21-2008 |
20080205641 | PRESERVING PRIVACY OF ONE-DIMENSIONAL DATA STREAMS USING DYNAMIC AUTOCORRELATION - A method, information processing system, and computer readable medium are provided for preserving privacy of one-dimensional nonstationary data streams. The method includes receiving a one-dimensional nonstationary data stream. A set of first-moment statistical values are calculated, for a given instant of sub-space of time, for the data. The first moment statistical values include a principal component for the sub-space of time. The data is perturbed with noise along the principal component in proportion to the first-moment of statistical values so that at least part of a set of second-moment statistical values for the data is perturbed by the noise only within a predetermined variance. | 08-28-2008 |
20080209568 | PRESERVING PRIVACY OF DATA STREAMS USING DYNAMIC CORRELATIONS - Disclosed is a method, information processing system, and computer readable medium for preserving privacy of nonstationary data streams. The method includes receiving at least one nonstationary data stream with time dependent data. Calculating, for a given instant of sub-space of time, A set of first-moment statistical values is calculated, for a given instant of sub-space of time, for the data. The first moment statistical values include a principal component for the sub-space of time. The data is perturbed with noise along the principal component in proportion to the first-moment of statistical values so that at least part of a set of second-moment statistical values for the data is perturbed by the noise only within a predetermined variance. | 08-28-2008 |
20100082545 | COMPRESSION OF SORTED VALUE INDEXES USING COMMON PREFIXES - A method, information processing system, and computer program storage product for compressing sorted values is disclosed. At least a first prefix and a second prefix in a plurality of prefixes are compared. Each prefix comprises at least a portion of a plurality of sorted values. A respective prefix comprises a set of consecutive characters including at least a first character of a respective sorted value. The respective sorted value further comprising a respective suffix comprising consecutive characters of the respective sorted value that are after the respective prefix. At least a respective first character of the first prefix and a respective first character of the second prefix are determined to be substantially identical. The first prefix is merged with the second prefix into a single prefix comprising the first character. A set of suffixes associated with the first prefix is updated to reflect an association with the second prefix. | 04-01-2010 |