A Visualization Tool of Probabilistic Models for Information Access Components

Περιέχει το πλήρες κείμενοSince massive collections of textual documents become more and more available in digital format, the organization and classification of these documents in Digital Library Management System (DLMS) becomes an important issue. Information access components of a DLMS, such as automatic categorization and retrieval components of digital objects, allow users to interact with the system in order to browse, explore, and retrieve resources from collections of objects. The demonstration presents a two-dimensional visualization tool of Na¨ıve Bayes (NB) probabilistic models for Automated Text Categorization (ATC) and Information Retrieval (IR) useful to explore raw data and interpret results

A Visualization Tool of Probabilistic Models for Information Access Components

An effective graphic interface is a key tool to improve the fruition of the results retrieved by an Information Retrieval (IR) system. In this work, we describe a two-dimensional interface that represents the documents ranked on a Cartesian space and allows the user to interact with the documents in order to improve the results of the search engine. Results are classified and ranked according to the best separating line of the two classes of documents: relevant and non relevant documents. Mathematical tools such as least squares distances are used to train the supervised algorithm that finds the separating and ranking lines

A Visualization Tool of Probabilistic Models for Information Access Components

This paper presents the design, implementation and evaluation of a query suggestion tool (named i-TEL-u) that allows for the management and the exploitation of different contexts in an integrated way within the same search interface for accessing the contents of The European Library portal\footnote{http://www.theeuropeanlibrary.org/}. i-TEL-u allows users to seamlessly move from one context to another according to their information needs and to the way these needs evolve during the search session. The aim of this tool is to improve the search functionalities of the portal, attract many users and give them easy and effective access\footnote{The work was partially supported by TELplus Targeted Project - eContent\emph{plus} Program of the European Commission (Contract ECP-2006-DILI-510003).}