1,721,048 research outputs found
Presentazione
No full textPresentazione del volume di Discipline Filosofiche "La metafisica del positivismo", con articoli di H. Luebbe, R. Fumerton, E.C. Banks, K. Egerton, M. Ferrari, L. Guidetti, M. Sommer, F. Piovesan, D. Ceccarelli, M. Gan
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
Bolzano e Cantor
No full textFor many centuries the predominant opinion of philosophers and mathematicians
was that infinite is only potential (quite in Aristotle’s sense of power) and that
actual infinite is, on the contrary, intrinsically not consistent. Among the first,
Bolzano has “proved” that actual infinite exists and that no contradiction arises if there
is a biunivocal correspondence between an infinite set and many of its proper subsets.
To be sure, Bolzano’s Paradoxes of Infinite had a powerful influence on Cantor’s
views about actual infinite, but their theories are in many respects at odds. Indeed,
according to Bolzano, if there is a biunivocal correspondence between sets A
and B this does not imply that A is as great as B; therefore we cannot define cardinal
numbers by means of the notion of biunivocal correspondence. Moreover he maintains
that a whole is greater than its parts. Bolzano claims that infinite sets can be
different in size and that there are infinite numbers: but, following his point of view,
he characterizes them in a way by no means compatible with Cantor’s. In conclusion
Bolzano’s insights on infinite do not prefigure Cantor’s theories, rather they
constitute an alternative approach to infinite which some modern mathematicians
pay attention to
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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