1,720,984 research outputs found
Margherita Piazzolla Beloch in the Italian Mathematics Education Tradition
No full textThe paper focuses on Margherita Beloch’s (1879–1976, married Piazzolla) approach to mathematical education, with particular attention to the education of prospective highschool teachers, which continued the approach by Federigo Enriques, as presented in his Questioni riguardanti le matematiche elementari (final edition, 1924–1927) written in collaboration with several university colleagues and highschool teachers. The educational role of classical geometrical matters regarding constructions was vindicated by her, from a personal approach including her attention to technology and applications, in her Lezioni di Matematica Complementare (1953)
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
Perspective with Nature: Daniele Barbaro, Jean François Niceron and a Device of Giovanni Battista Vimercati
No full textIn 1565 Giovanni Battista Vimercati published in Venice a treatise on gnomonics in which there is a device for making copies of sundials. This tool must be exposed under the Sun and contains: two styli; a drawing; and a blank sheet on which to draw the new delineation. The way it works is simple. While one stylus retraces the drawing with its shadow, the other projects an equal shadow that makes the user able to draw a copy. Vimercati did not explain the geometric rules underlying his device and did not indicate relations with other scientific or practical fields. A few years later, Barbaro will explain the link between perspective and gnomonics, just mentioning the tool of Vimercati. In his treatise Barbaro demonstrates also why we should consider the rays of light like physical elements that embody the geometric process of vision. In the following century Jean Fraçois Niceron understood the true potential of Vimercati’s tool by projecting the shadow of a stylus on all kind of surfaces. The Minim friar used this gnomonic device to obtain anamorphoses. So, Vimercati’s tool epitomizes the physical connection between light and visual rays, acting as a bridge between sundials and vision
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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