1,720,959 research outputs found
Modificazioni indotte su prodotti a base di idrossido di calcio dall'azione dell'acido ortofosforico.
No full textPuntualizzazioni sul modello di controllo ad errore di equazione in condizione di circuito chiuso: risultati di una simulazione
No full textLa dimensione delle risorse di calcolo e le difficoltà di interpretazione dei risultati di una simulazione di una procedura di stima complessa possono essere ridotte drasticamente se si dispone di statistiche consistenti distribuite asintoticamente in modo noto. Sotto le stesse condizioni è possibile non solo controllare gli esiti di una simulazione ma anche pianificare la numerosità minima ("velocità di convergenza") indispensabile per garantire una "precisione" assegnata delle stime dei parametri basate su dati concreti.
Una applicazione degli strumenti proposti è stata realizzata con riferimento allo studio delle proprietà statistiche di una particolare tecnica di stima basata sui minimi quadrati, ricolta all'individuazione dei parametri di un modello di controllo ad errore di equazione per un sistema operante in condizione di circuito chiuso
Sistema Caridex per la rimozione della carie. Sperimentazione clinica.
No full textThe Authors show the results of clinical tests of the Caridex system performed on adults between the ages of 15 and 60 years under the treatments of the Hospital's Odontological Division of the Pavia University. On this ground, after considering the advantages and disadvantages that the chemo-mechanical removal offers to the patient, the Authors show the real indications asserting that this system, even if is not able to supplant the traditional methodologies, it can be helpful if mixed with them and, in limited cases, it can completely replace the drill
L'otturazione tridimensionale del canale radicolare con la guttaperca riscaldata: valutazione comparativa di differenti metodiche.
No full textIl sistema Caridex per la rimozione della carie: osservazioni al M.E.S.
No full textThe Authors observed at the SEM the surface of the dentine treated with the Caridex system, comparing it with the one of cavities prepared with traditional systems. The use of chemo-mechanical system consents to obtain a more indented and cleaned surface, even if more or less covered by mineralized deposits that can be removed with the use of a detergent for cavities. It results a surface particularly proper to the use of adhesives fillings materials
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
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
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