1,720,995 research outputs found
Aquifer-type behaviour of Marnoso-Arenacea formation in Northern Apennines: evidences from hydrogeological monitoring and hydrochemical data
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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
Opening address, Landslide Scenarios accountig for Climatic, Geomorphological and Geotechnical Contexts
No full textVariations 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
A New Interpretation of the Geotechnical Context of the Vajont Rockslide
No full textThis study presents the detailed reconstruction of the entire structure of the oldest Vajont rockslide (270-300 million of m3) for the first time, describing the complex geometry and the characteristic superimposition of distinct rigid blocks on a very thick shear zone (40-50 m thick) made up of a chaotic assemblage of rock blocks, limestone angular gravel and high plasticity clays. Typical back-calculated values of the friction angle φm, obtained for the 1963 Vajont slide, ranged essentially from 17° to 27° but these are mean values referring to the entire slip surface and can differ considerably from the true shear strength properties of the materials effectively involved in the failure. This explains the difference between the friction angles measured by means of different shear tests on various Vajont clay samples (φc = 6-15°, prevailingly) and the typical back-calculated mean values. The recognition of the bottom shear zone is decisive both for the geotechnical and the hydrogeological modelling of the huge Vajont landslide (Oct. 9, 1963). © Springer-Verlag Berlin Heidelberg 2013
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
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