1,721,174 research outputs found
Remarques sur quelques sites préhistoriques de la vallée du Nil (deuxième cataracte)
No full textMaley Jean. Remarques sur quelques sites préhistoriques de la vallée du Nil (Deuxième Cataracte). In: Bulletin de la Société préhistorique française. Comptes rendus des séances mensuelles, tome 63, n°2, 1966. pp. 71-72
Une industrie sur galet de la vallée du Nil (Soudan)
No full textChavaillon Jean, Maley Jean. Une industrie sur galet de la vallée du Nil (Soudan). In: Bulletin de la Société préhistorique française. Comptes rendus des séances mensuelles, tome 63, n°2, 1966. pp. 65-70
Populations and climatic evolution in North Tropical Africa from the end of the Neolithic to the dawn of the modern Era
No full textAt the end of the Neolithic Era, during the third millennium BCE, there were fewer humid periods, and the sub-Saharan and Sahelian zones from the Atlantic to Lake Chad assumed their current geographical form. Since then, the climate has continued undergoing major variations. The succession of climatic episodes, humid or dry, is pointed out along with the episodes'complex interactions. These variations are placed in parallel to cultural phases of evolution in archaeology and history. Climate-related events have always had heavy consequences on the peopling of this vast region, often subject to extreme natural conditions. The relative synchronism between the principal cultural trends from west to east across the Sahel seems to have often been subject to swings in the climate and the resulting environmental changes
E5 — Etude palynologique
No full textPollen analysis of dusts and resins taken from the mummy display above all the following taxa : Hordeum and Carthamus tinctorius for the dusts and Ricinus communis, Mimusops cf. schimperi, Acacia nilotica and Phœnix dactylifera for the resins. Relatively high pollen frequencies of these plants seem to be a result of their use in the resin-making process (Ricinus, Acacia nilotica, perhaps Phœnix), in the embalming practices and in the funeral ritual (Mimusops, Hordeum, Carthamus tinctorius).L'analyse pollinique de poussières et de résines recueillies sur la momie met surtout en évidence les taxons suivants : Hordeum et Carthamus tinctorius pour les poussières et Ricinus communis, Mimusops cf. schimperi, Acacia nilotica et Phœnix dactylifera pour les résines. Les fréquences polliniques relativement élevées de ces végétaux semblent découler de leur utilisation dans la fabrication de la résine (Ricinus, Acacia nilotica, peut être Phœnix), dans les pratiques de l'embaumement et dans le rituel funéraire (Mimusops, Hordeum, Carthamus tinctorius).Girard M., Maley Jean. E5 — Etude palynologique. In: Nouvelles archives du Muséum d'histoire naturelle de Lyon, tome 25, 1987. pp. 103-110
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
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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