The generalization of Boolean lnformatlon Retrieval Systems (IRS) is still an open research field; in fact, though such systems are diffused on the market, they present some limitations; one of the main features lacking in these systems is the ability to deal with the “imprecision” and “subjectivity” characterizing retrieval activity. However, the replacement of such systems would be much more ...

Fusion of various retrieval strategies has long been suggested as a means of improving retrieval effectiveness. To date, testing of fusion was done by combining result sets from widely disparate approaches that include an uncontrolled mixture of retrieval strategies and utilities. To isolate the effect of fusion on individual retrieval models, we have implemented probabilistic, vector space, an...

Information retrieval focuses on content-based searching in text documents. For this purpose, first text content must be represented, by using a representation language (like thesauri or classification schemes) or by performing free-text search. The latter approach uses either string-based or computer-linguistic methods (stemming, dictionary lookup, syntax analysis). For retrieval, weighting an...

in this paper the concept of an $omega$- almost boolean ring is introduced and illistrated how a sheaf of algebras can be constructed from an $omega$- almost boolean ring over a locally boolean space.

To address the emerging needs of applications that require access to and retrieval of multimedia objects we are developing the Multimedia Analysis and Retrieval System MARS in our group at the University of Illinois In this paper we concentrate on the retrieval subsystem of MARS and its support for content based queries over image databases Content based retrieval techniques have been extensive...

This paper presents a detailed analysis of the structure and components of queries written by experimental participants in a study that manipulated two factors found to affect end-user information retrieval performance: training in Boolean logic and the type of search interface. As reported previously, we found that both Boolean training and the use of an assisted interface improved the partici...

Recent research on fuzzy quantification for information retrieval has proposed the application of semi-fuzzy quantifiers for improving query languages. Fuzzy quantified sentences are useful as they allow additional restrictions to be imposed on the retrieval process unlike more popular retrieval approaches, which lack the facility to accurately express information needs. For instance, fuzzy qua...

While end users these days seem happy with best-match text-retrieval systems, it appears that expert searchers still prefer exact-match (Boolean) text-retrieval systems by an overwhelming margin. This is somewhat surprising. Most expert searchers were probably trained with Boolean systems, and an obvious factor is simply preferring the familiar, but we argue that a second major factor is that t...