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Barbara Melosu (2013) — Les industries lithiques en silex de Sardaigne au Néolithique
No full textMelosu Barbara. Barbara Melosu (2013) — Les industries lithiques en silex de Sardaigne au Néolithique. In: Bulletin de la Société préhistorique française, tome 111, n°4, 2014. pp. 752-753
What are these blades for? Flint blade production and circulation in the Final Neolithic Sardinia
No full textAt the end of the Neolithic (at the bridge between the 5th and 4th millennia BC), concurrently with the origin of the Ozieri Culture, obsidian was the most exploited lithic resource in Sardinia. During this time, the early stages of the obsidian reduction system seem to have been located in close proximity to the primary outcrops on the Monte Arci massif. In these areas, raw matter reduction was essentially addressed the creation of preforms of polyhedral cores for a blade production trajectory; the end products were distributed afterwards through organized exchange networks. In the same period, many flint sources were exploited but mainly at a local level. Yet, some other sources in the North Sardinia Oligo-Miocene basin of Perfugas (Anglona region) were exploited on a
supra-local scale, even in the first phase of the Ozieri culture (the first half of the 4th millennium). This good-quality material circulated in the form of long blades obtained especially by the pressure technique, even boosted by a long lever. Despite the wide availability of other good-quality raw materials, especially obsidian, these artefacts are made only of this quality of flint. The end of this production is still uncertain, but flint pressure blades were still in circulation at the end of the 4th millennium. Although multiple factors may explain this evidence, cultural and social explanations seem to be among the most relevant
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
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
The Neolithic flint industries of Sardinia : exploitation, circulation and productions. : A first approach
No full textCe travail de thèse, le premier pour la Sardaigne consacré entièrement à la production sur silex, offre un regard nouveau sur les assemblages en pierre taillée du Néolithique, mettant en lumière la manière dont les différentes phases de la production lithique sont mises en place, depuis l'acquisition de la matière première jusqu'à l'obtention de produits finis. Cela sur la durée et sur une aire géographique vaste. D’autre part, il permet de reconstruire le comportement des néolithiques par rapport à ce matériel et, par rapport aux autres ressources lithiques exploités durant l’arc chronologique analysé, l’obsidienne en particulier.In Sardinia the use of siliceous raw materials for the production of chipped stone artifacts is frequent in prehistory, although to varying degrees in relation to the areas and periods analyzed. These lithotypes, characterized by different qualities, have a great variability and a wide spread over the entire region. This work presented a summary of the diachronic variations in lithic flint production during the Neolithic, focusing on the one side, to describe their typological and technological features and, on the other side, to illustrate the variations in the raw material selection behaviors occurred in this period
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
Dispelling the Myths Behind First-author Citation Counts
Get PDFWe 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
Occupazione antropica e sfruttamento dell'ossidiana sul Monte Arci: il territorio di Pau (OR)
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