1,720,966 research outputs found
Orientarsi nella pandemia Covid-19: i dati necessari
No full textI dati sono centrali per comprendere come l’epidemia sta evolvendo. Devono essere raccolti secondo un disegno organico nel quale siano dominanti l’interdisciplinarità e la cooperazione. Occorre integrare i dati di sorveglianza sanitaria con quelli derivanti da indagini campionarie, per valutare la probabilità di contagio, monitorare il sistema scolastico e la rete della medicina territoriale. Deve essere costruito un sistema di monitoraggio idoneo a sostenere le scelte politiche e a motivare i comportamenti delle persone e degli operatori economici. La trasparenza deve essere assunta come valore distintivo da parte delle istituzioni responsabili delle decisioni per il contrasto dell’epidemia. Soltanto in questo modo è possibile acquisire credibilità e guadagnare la fiducia dei cittadini, essenziale per uscire dall’epidemia il prima possibile
I ventuno indicatori e i colori delle regioni
No full textVentuno indicatori, altrettante soglie di allerta, due algoritmi (di probabilità e di impatto), una matrice di attribuzione del rischio e ‘automaticamente’ si otterrebbe il colore delle regioni, con quello che ne seguirebbe in termini di chiusure, aperture, spostamenti, seconde case, didattica a distanza. Giorgio Alleva e Alberto Zuliani ci spiegano che non è proprio così. C’è molto mestiere, magari utile, nel sistema ma poca trasparenza. È ormai necessario procedere alla ridefinizione di un set di indicatori pertinenti per una corretta e tempestiva valutazione del rischio epidemico
Epidemia di Covid-19: informazione, misure, comunicazione, comportamenti
No full textIl Rapporto, curato da Felice Roberto Pizzuti, Michele Raitano e Massimiliano Tancioni, è redatto in Sapienza, con il contributo anche di studiosi ed esperti esterni. Le tematiche specifiche analizzate quest’anno riguardano i mutamenti economico- sociali indotti dal Covid-19, la sua valenza storica che travalica gli aspetti sanitari, i suoi “effetti collaterali” sulle teorie e sulle politiche economiche prevalenti nei passati decenni che prefigurano nuovi equilibri nei rapporti stato-mercato, un più accentuato ruolo dei sistemi di welfare e una maggiore spinta alla costruzione europea
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
Variations 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
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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