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(1995) - The Messinian mammal faunas from Italy and their paleobiogeographic implications
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Going Beyond Counting First Authors in Author Co-citation Analysis
Get PDFThe 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
Mammal change and isotopic biogeochemistry. An interdisciplinary approach to climatic-environmental reconstruction during the last Pleniglacial/Late-Glacial transition in the Grotta Paglicci section (Gargano, Apulia).
No full textFossil elephants from buia (Northern Afar depression, Eritrea) with remarks on the systematics of Elephas recki (Proboscidea, Elephantidae)
No full textA succession of five fossiliferous levels near Buia in the northern Danakil (Afar) Depression of Eritrea has produced an abundant early Pleistocene fauna including a ca. 1.0 Ma cranium of Homo. Elephas is well represented at many sites; with one exception the entire Buia Elephas sample represents a relatively derived member of the Elephas recki lineage. Univariate and multivariate analysis of dental characters demonstrates that the Buia sample is intermediate between E. recki ileretensis (Koobi Fora, Ileret) and E. r. recki (Beds 3 and 4 at Olduvai). The biologic reality of the separation of E. recki into five chronologically successive subspecies is questionable. Our analysis supports the hypothesis that E. r. ileretensis and E. r. recki form a single phyletic lineage. © 2003 by the Society of Vertebrate Paleontology
Variations on the Author
Get PDF“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
Structural changes in Italian Late Pliocene - Pleistocene large Mammal assemblages
No full textA schematic range-chart of the late Pliocene - Pleistocene large mammal genera is presented. The main faunal events recognizable within this time span are discussed. The first faunal event occurs around the Gauss/Matuyama transition with the beginning of the middle Villafranchian characterized by the arrival of Mammuthus (Archidiskodon) and Equus (the so-called "elephant-Equus event"). The following faunal event occurs at the Plio-Pleistocene transition (the so-called "wolf event"). The latter is marked by a strong contraction in the diversity of the ruminants and by a renewal in the carnivore diversity with the arrival of social carnivores. The low diversity in ruminant assemblage persist until the end of the middle Pleistocene when new arrivals again produce a diversity similar to the final Pliocene one
Segnalazione di mammiferi pleistocenici nell’area di Colfiorito (Appennino umbro-marchigiano) e valutazione della potenzialità del giacimento con metodi geofisici.
No full textThe paleontological deposits has yielded an assemblage of Hippopotamus antiquus, Dicerorhinus etruscus, Elephas sp. two cervid species, an equid, a quite evolved bovid and a hyenid. Their occurence suggest an age comprised between the uppermost Early Pleistocene and the lowermost Mid Pleistocene. from the palaecological poit of view, the assemblage seems to belong to a moist and open forest environment
Appropriate Similarity Measures for Author Cocitation Analysis
Get PDFWe 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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