1,721,249 research outputs found
Ingegneria della Conoscenza
No full textla necessità di sviluppare sistemi di rappresentazione della conoscenza che integrino espressività ed efficienza nella gestione di grandi quantità di informazione è ormai largamente sentita. In questo articolo si tratta l'evoluzione da DBMS a sistemi in grado di aggiungere espressività e maggiore intelligenza
Going Beyond Counting First Authors in Author Co-citation Analysis
Full text linkThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
An Approach for the Extraction of Information from Heterogeneous Sources of Textual Data
No full textCEUR Workshop Proceedings. Aten
Variations on the Author
Full text link“Variations on the Author” discusses two of Eduardo Coutinho’s recent films (Um Dia na Vida, from 2010, and Últimas Conversas, posthumously released in 2015) and their contribution to the general question of documentary authorship. The director’s filmography is characterized by a consistent yet self-effacing form of authorial self-inscription: Coutinho often features as an interviewer that rather than express opinions propels discourses; an interviewer that is good at listening. This mode of self-inscription characterizes him as an author who is not expressive but who is nonetheless markedly present on the screen. In Um Dia na Vida, however, Coutinho is completely absent form the image, while Últimas Conversas, on the contrary, includes a confessional prologue that moves the director from the margins to the center of his films. This article examines the ways in which these works stand out in the filmography of a director who offers new insights into the notion of cinematic authorship
Appropriate Similarity Measures for Author Cocitation Analysis
Full text linkWe provide a number of new insights into the methodological discussion about author cocitation analysis. We first argue that the use of the Pearson correlation for measuring the similarity between authors’ cocitation profiles is not very satisfactory. We then discuss what kind of similarity measures may be used as an alternative to the Pearson correlation. We consider three similarity measures in particular. One is the well-known cosine. The other two similarity measures have not been used before in the bibliometric literature. Finally, we show by means of an example that our findings have a high practical relevance.information science;Pearson correlation;cosine;similarity measure;author cocitation analysis
Basi di conoscenza e basi di dati: memorizzazione degli aspetti estensionali
No full textIn questo paper si descrive la diversa rappresentazione della conoscenza estensionale nelle basi di dati e nelle basi di conoscenza
Un editor intelligente per la costruzione di una base di conoscenza secondo il modello entita' situazione
No full textAtti di: P. Mello, (a cura di). Bologna
Scoperta di regole per l’ottimizzazione semantica delle interrogazioni
No full textOttimizzazione Semantica delle Interrogazioni in ambiente relazionale con riferimento a vincoli di integrità che rappresentano restrizioni e semplici regole sugli attributi. Utilizzo del sistema Explora per la derivazione automatica delle regole da usare nell'ambito del processo di Ottimizzazione Semantica delle Interrogazioni
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