1,720,977 research outputs found
Thin shelled bivalves from the Jurassic Rosso Ammonitico and Calcari a Ponidonia Formation of the Umbrian-Marchean Apennine (Central Italy)
No full textBivalve and Gastropod fauna from the Liassic Ammonitico Rosso facies in the Bilecik area (Western Pontides, Turkey)
No full textFossil bivalves and gastropods originating from clay marly Ammonitico Rosso facies are described from the Western Pontides (Turkey). The fauna of Early Jurassic (Late Sinemurian-Early Pliensbachian) age is composed of 20 species of bivalves and 41 species of gastropods. The following new species are described: Parainoceramus altineri, Parainoceramus bileciki, Parainoceramus farinacciae , Parainoceramus nicosiai, Scissurella? (Scissurella?) szaboi, Margarites (Margarites?) kocyigiti, Brookula? (Brookula?) oliverioi. The fauna is indicative of a firm bottom with scattered hard-grounds at a relative shallow depth. The condensation phoenomena were caused by several removals of debris that could happen from time to time but not continuously. The assemblage seems to be controlled by the type of environment rather than by paleobiogeograpbic distribution
Osservazioni preliminari sui gasteropodi della Marmolada della collezione del Museo Civico di Predazzo (Trento)
No full textJurassic gastropods from Sicily.New data to the classification of Ataphridae (Trochoidea)
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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
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
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