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Bivalves du Sénonien de Vendée (Bassin de Challans-Commequiers). Signification biostratigraphique, paléobiogéographique, paléoécologique
No full textThe Senonian Formation of Soullandeau in Vendée yielded more than 40 Bivalvia species (exclusive of rudists and inocerams), among 16 localities in the Challans-Commequiers basin. Bivalve assemblages and» biofacies are showing by their specific diversity gradient the fluctuations of the environment of the basin : low diversity (with Ostreacea only) in the Lower and Upper members on the Formation ; high diversity (with mainly Pteriomorphia) in the middle member, but with decrease from the sandy-calcareous parareef biotope with rudists to the sands with sponges. The preponderant paleobiogeographical relations are, from the Santonien to the Upper Campanian, with the near regions : Touraine, Poitou, North of the Aquitanian basin.La formation sénonienne du Soullandeau de Vendée a livré plus de 40 espèces de Bivalves (Rudistes et Inocérames non compris), récoltées parmi 16 gisements du bassin de Challans-Commequiers. Assemblages et biofaciès à Bivalves reflètent par leur gradient de diversité spécifique les fluctuations de l'environnement du bassin : basse diversité (uniquement à Ostreacea) dans les membres inférieur et supérieur de la formation ; haute diversité (principalement à Pteriomorphia) dans le membre moyen, mais avec décroissance depuis les biotopes sablo-calcaires pararécifaux à Rudistes jusqu'aux sables à Spongiaires. Les relations paléobiogéographi-ques sont prépondérantes du Santonien au Campanien supérieur avec les régions proches : Touraine, Anjou, Nord du bassin d'Aquitaine.Freneix Suzanne, Viaud J.M. Bivalves du Sénonien de Vendée (Bassin de Challans-Commequiers). Signification biostratigraphique, paléobiogéographique, paléoécologique. In: Géologie Méditerranéenne. Tome 10, numéro 3-4, 1983. Colloque sur les étages coniaciens à Maastrichtien. Marseille, 26-28 septembre 1983. pp. 199-211
Bryozoaires du Sénonien de Vendée (bassin de Challans-Commequiers)
No full textThe discovery of rich bryozoan faunas in the Santonian and Campanian of the Vendée has considerably augmented our knowledge of the French Senonian bryozoan faunas. A preliminary list of the 66 identified species is given. Unfortunately many species cannot yet be determined with certainly before a modern revision of A. d'Orbigny's classic bryozoan work (1851-1854) in his «Paléontologie française». The biogeographical character of that fauna is similar to that of the Senonian bryozoan fauna in the South-Western margin of the Aquitanian basin in Southern France, where the tethydian influence is unmistakable. There are only few relations with the boreal province and with the white chalk bryozoa of the mid and north European region. Three new species of Cyclostomatous Bryozoa and the new genus Heteroha-plooecia are established.La découverte de riches faunes de Bryozoaires, dans le Santo-nien et le Campanien de Vendée par l'un de nous (J.M. V.) a permis d'augmenter considérablement nos connaissances des Bryozoaires sénoniens en France. Une liste préliminaire comprend 66 espèces déterminées. En l'absence d'une révision moderne de l'œuvre monumentale de A. d'Orbigny, («Paléontologie française»), beau¬ coup d'espèces ne peuvent être idenfiées avec sûreté. Les formes étudiées sont voisines de celles du Coniacien-Santonien de la marge Sud-Ouest du bassin de Paris et du bassin d'Aquitaine qui montrent une influence téthysienne. Le caractère biogéographique est plus proche des faunes du Sud que de celles de la province boréale ou des Bryozoaires de la craie blanche de l'Europe moyenne ou du Nord. Trois espèces nouvelles (Bryozoaires cyclostomes) sont décrites.Voigt Ehrhard, Viaud J.M. Bryozoaires du Sénonien de Vendée (bassin de Challans-Commequiers). In: Géologie Méditerranéenne. Tome 10, numéro 3-4, 1983. Colloque sur les étages coniaciens à Maastrichtien. Marseille, 26-28 septembre 1983. pp. 219-228
La transgression sénonienne en Vendée
No full textOn the basis of the stratigraphie analysis of the cretaceous deposits of the Vendée the «formation du Soullandeau» is erected and assigned to the Senonian. This lithostratigraphic unit begins with terrigeneous shoreline facies (Sables et argiles des Bardys) assigned to the Lower Santonian. They are overlain by predominantly sandy shallow shelf deposits containing siliceous skeletal components (Sables efrargiles à Spongiaires de Soullans) with lateral intercalations of sandy bioclastic marls and rudist limestone lenses (Marnes et calcaires de la Tonnelle). These two members are assigned to the middle and upper Santonian and to the Campanian. A model of the Senonian transgression on the south armorican massif border is proposed on the basis of the lithological succession.Le Sénonien est représenté en Vendée par la formation du Soul-landeau. Cette unité lithostratigraphique débute par des sables et argiles très littoraux (Sables et argiles des Bardys) rapportés au Santonien inférieur. Ils sont surmontés par des dépôts sableux de plateforme littorale à bioclastes siliceux (Sables et argiles à Spongiaires de Soullans) qui passent latéralement à des marnes sableuses bioclastiques et des lentilles de calcaire à Rudistes (Marnes et calcaires de la Tonnelle). Ces deux membres sont rapportés au Santonien moyen supérieur et au Campanien. L'analyse de la succession lithologique permet de reconstituer les diverses étapes de la transgression sénonienne sur la bordure méridionale du Massif armoricain.Louail Jacques, Azema Catherine, Viaud J.M. La transgression sénonienne en Vendée. In: Géologie Méditerranéenne. Tome 10, numéro 3-4, 1983. Colloque sur les étages coniaciens à Maastrichtien. Marseille, 26-28 septembre 1983. pp. 337-344
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
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
koamabayili/VECTRON-author-checklist: VECTRON author checklist
No full textWe have done our best to complete the author checklist relating to the use of animals in the hut study. Note that the objective for the hut study was to evaluate the IRS treatment applications for residual efficacy against Anopheles mosquitoes, including the local An. coluzzii mosquito population. Cows were only used to attract mosquitoes into the huts and no tests were carried out directly on the cows. The author checklist is intended for use with studies where experiments are carried out on animals, which is why we have had such difficulty in completing this for the hut study, as many of the questions do not relate to how the cows were used
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