Abstract: An apparatus for searching a document collection is provided.

Abstract: A method for searching a document collection includes providing an index of terms indicating the documents in which the terms appear. A first statistical distribution of each of at least some of the terms in the index and a second statistical distribution of each of at least some of the categories are estimated a over the documents in the collection. A query including one or more of the terms and a category restriction referring to at least one of the categories is accepted. A modified term distribution is produced by operating on the first statistical distribution of at least one of the terms in the query using the second statistical distribution, responsively to the category restriction. The query is applied to the index to return a response, in which occurrences of the at least one of the terms are scored responsively to the modified term distribution.

Abstract: A system for monitoring search performance and user interaction is provided in the form of a utility (300) including a plurality of monitoring components (302), each for dynamic monitoring of an aspect of searching a collection of documents. An analyzer module (303) analyzes the dynamic monitoring and identifies problems or difficulties in the search performance or user interactions. An output (301), which may be in the form of a display interface, provides information regarding the search performance and user interaction including one or more of: reasoning, improvement suggestions, reports, and problem alerts. The analyzer module (302) compares the dynamic monitoring to benchmark search engine conduct and document collection state.

Abstract: A method for searching a document collection includes providing an index of terms indicating the documents in which the terms appear. A first statistical distribution of each of at least some of the terms in the index and a second statistical distribution of each of at least some of the categories are estimated a over the documents in the collection. A query including one or more of the terms and a category restriction referring to at least one of the categories is accepted. A modified term distribution is produced by operating on the first estimated statistical distribution of at least one of the terms in the query using the second estimated statistical distribution of the at least one of the categories, responsively to the category restriction. The query is applied to the index so as to return a response, in which occurrences of the at least one of the terms are scored responsively to the modified term distribution.

Abstract: A method for Automatic Query Refinement, the method including extracting at least one lexical affinity from at least one document in a search result set of documents, the set resulting from the application of a first query to a document search engine, adding the lexical affinity to the first query, thereby forming a new query, and applying the new query to the document search engine, resulting in a new search result set.

Abstract: A method for Automatic Query Refinement, the method including extracting at least one lexical affinity from at least one document in a search result set of documents, the set resulting from the application of a first query to a document search engine, adding the lexical affinity to the first query, thereby forming a new query, and applying the new query to the document search engine, resulting in a new search result set.

Abstract: System for the storage and maintenance of data sets updates in a storage subsystem, that comprises direct access storage device(s) that serves as the main storage of the storage subsystem and on which the data sets are originally stored; a Cache memory storage device that enables fast interaction with the storage subsystem, on which a copy of the data sets is stored; a non-volatile storage device partitioned into a plurality of fixed size non-volatile memory pages.

Abstract: System for the storage and maintenance of data sets updates in a storage subsystem, that comprises direct an access storage device(s) that serves as the main storage of the storage subsystem and on which the data sets are originally stored; a Cache memory storage device that enables fast interaction with the storage subsystem, on which a copy of the data sets is stored; a non-volatile storage device partitioned into a plurality of fixed size non-volatile memory pages.