1,720,984 research outputs found
La prassi di rendicontazione sociale nelle società quotate italiane
No full textIl capitolo presenta un'indagine empirica sui bilanci sociali e di sostenibilità delle società quotate italiane, con riferimento all'anno 2003. Vengono indagate struttura e contenuti, anche con riferimento agli standard di rendicontazione applicabili
Nel cielo di Ovidio: Calvino, Leopardi e le favole antiche
No full textLo studio, dopo una premessa dedicata alle «Lezioni americane» di Italo Calvino, si concentra sulla canzone «Alla Primavera, o delle favole antiche» (1822) di Giacomo Leopardi, mettendo in evidenza alcuni precisi riscontri testuali con passi delle «Metamorfosi» di Ovidio, nel testo latino e nella traduzione dell'Anguillara. Vengono affrontati i miti di Atteone, di Icaro, di Fetonte e di Giacinto, con riferimenti ad altri luoghi dei «Canti» e anche a testi di Petrarca e di Callimaco; un'attenzione specifica è riservata alle leggende legate alle divinità solari e lunari
Going Beyond Counting First Authors in Author Co-citation Analysis
Get PDFThe 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
EFFECT OF A MULTIPHASIC ANODIC SPARK DEPOSITION COATING ON THE IMPROVEMENT OF IMPLANT OSSEOINTEGRATION IN THE OSTEOPENIC TRABECULAR BONE OF SHEEP
No full textVariations on the Author
Get PDF“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
Trattamenti superficiali su leghe d’interesse ortopedico/Surface treatments on orthopaedic alloys
No full textLe protesi articolari e i dispositivi per il fissaggio osseo sono realizzati quasi esclusivamente in lega Ti6Al4V e lega CoCrMo in virtù della loro inerzia chimica in ambiente fisiologico. Queste caratteristiche sono però insufficienti a garantire il successo dell’impianto se non accompagnate da un comportamento tribologico adeguato alla funzione del dispositivo. Per migliorare le proprietà superficiali di entrambe le leghe sono stati proposti rivestimenti PVD in TiNbN su substrati in CoCrMo. Tali coating si sono dimostrati efficienti barriere al rilascio di ioni ma devono essere post-lucidati per mantenere il basso coefficiente di attrito verso il polietilene. Trattamenti di ossidazione PEO su substrati in Ti6Al4V si sono dimostrati promettenti alternative ai film sottili PVD, sia come barriera al rilascio di ioni, sia come miglioramento delle proprietà tribologiche del substrato.Articular replacements and trauma medical devices are mainly made of Ti6Al4V and CoCrMo alloys due to their chemical inertness in body environment. However, this characteristic is not sufficient to guarantee good implant performance if no adequate tribological resistance is also present. In order to increase the surface properties of both materials different surface treatment have been proposed. TiNbNPVD on CoCrMo has shown to be an effective barrier against ion release from the substrate, however it needs a final polishing treatment in order to maintain its low friction coefficient against polyethylene. PEO oxidation treatment on Ti6Al4V showed to be good alternatives to PVD thin films, both as ion release barrier and enhancing tribological substrate properties
Appropriate Similarity Measures for Author Cocitation Analysis
Get PDFWe 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
Dispelling the Myths Behind First-author Citation Counts
Get PDFWe conducted a full-scale evaluative citation analysis study of scholars in the XML research field to explore just how different from each other author rankings resulting from different citation counting methods actually are, and to demonstrate the capability of emerging data and tools on the Web in supporting more realistic citation counting methods. Our results contest some common arguments for the continued
use of first-author citation counts in the evaluation of scholars, such as high correlations between author rankings by first-author citation counts and other citation
counting methods, and high costs of using more realistic citation counting methods that are not well-supported by the ISI databases. It is argued that increasingly available digital full text research papers make it possible for citation analysis studies to go beyond what the ISI databases have directly supported and to employ more
sophisticated methods
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