1,720,979 research outputs found
Figli Virtuali
No full textIl volume introduce genitori e educatori nel complesso compito di interpretazione
del mondo digitale, soprattutto in riferimento a bambini e preadolescenti. Figli
virtuali si rivela uno strumento agile ed efficace per accompagnare tutte le figure
che circondano i più giovani in un percorso ad ampio raggio. Si affrontano i temi
dell’analfabetismo funzionale e digitale e delle fasi di crescita del bambino, che va
accompagnato nell’esplorazione, tra educazione e complicità. Vengono poi approfonditi
rischi, regole e potenzialità delle nuove tecnologie, fornendo alcuni suggerimenti
sull’uso corretto e consapevole di web, social network, applicazioni e chat.
Il manuale è arricchito dai contributi di Luca Bolognini, avvocato del foro di Roma
e presidente dell’Istituto Italiano per la Privacy e la Valorizzazione dei Dati, di
Camilla Bistolfi, giurista e direttrice del Centro Nazionale Anti Cyberbullismo,
e di Chiara Spalatro, insegnante di italiano e storia nella scuola secondaria di
1° grado, formatrice e animatrice digitale. La prefazione è affidata al magistrato
Filomena Albano, titolare dell’Autorità Garante per l’Infanzia e l’Adolescenza
Properties of Mixing BV Vector Fields
Full text linkWe consider the density properties of divergence-free vector fields b∈L1([0,1],BV([0,1]2)) which are ergodic/weakly mixing/strongly mixing: this means that their Regular Lagrangian Flow Xt is an ergodic/weakly mixing/strongly mixing measure preserving map when evaluated at t= 1 . Our main result is that there exists a Gδ -set U⊂Lt,x1([0,1]3) containing all divergence-free vector fields such that 1.the map Φ associating b with its RLF Xt can be extended as a continuous function to the Gδ -set U ;2.ergodic vector fields b are a residual Gδ -set in U ;3.weakly mixing vector fields b are a residual Gδ -set in U ;4.strongly mixing vector fields b are a first category set in U ;5.exponentially (fast) mixing vector fields are a dense subset of U . The proof of these results is based on the density of BV vector fields such that Xt=1 is a permutation of subsquares, and suitable perturbations of this flow to achieve the desired ergodic/mixing behavior. These approximation results have an interest of their own. A discussion on the extension of these results to d≥ 3 is also presented
Comunicazione istituzionale e comunicazione politica: quella sottile linea di confine.
No full textGennaio 2020, ultimo giorno del mese. Il governo Conte proclama lo stato d’emergenza per l’epidemia da Coronavirus. Ce ne renderemo conto solo in seguito: è il giorno che cambia la politica italiana e, quindi, il modo di comunicarla. L’istituzione che si fa politica, l’utilizzo dei social, della stampa e della tv, la difficoltà di reagire a un momento storico inaspettato. Con i contributi di Francesco Di Costanzo, Livio Gigliuto e Michele Zizza, un’intervista ad Alessio Postiglione e i dati di Data Media Hub, l’autore scatta un’istantanea delle tecniche con cui la politica comunica sé stessa nel periodo del lockdown. E sceglie di farlo mettendo sotto i riflettori la comunicazione di sei leader: Giuseppe Conte, Matteo Renzi, Matteo Salvini, Vincenzo De Luca, Silvio Berlusconi e Giorgia Meloni
Uno storico sui generis: la metodologia argomentativa nel libro v della Politica
No full textViene verificata, per la prima volta, l'applicazione dei metodi di indagine e di analisi aristotelici in uno dei libri 'storici' della Politica, mettendone in evidenza la peculiarità in relazione all'oggetto trattato, ossia i conflitti interni alle città e le metabolai costituzionali.This paper examines, for the first time, the application of Aristotelian methods of investigation and analysis in one of the “historical” books of Politics, highlighting their peculiarity in relation to the subject matter, namely internal conflicts within cities and constitutional metabolai
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
Dispelling the Myths Behind First-author Citation Counts
Full text linkWe 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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