1,721,139 research outputs found
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
Supplementary Material of Moreau et al. "FACTORS INFLUENCING EARLY AND LATE DIAGENESIS IN CENOZOIC MARINE, PALUSTRINE AND LACUSTRINE CARBONATES OF THE PARIS BASIN (FRANCE)"
No full textThis file contains the supplementary material of the paper entitled "FACTORS INFLUENCING EARLY AND LATE DIAGENESIS IN CENOZOIC MARINE, PALUSTRINE AND LACUSTRINE CARBONATES OF THE PARIS BASIN (FRANCE)" by Moreau et al. Supplementary Material include a summary of all the samples in this study ("Sample_list.xlsx"), their location and the list of analyses carried out, isotopic data (Isotopes_Data.xlsx), detailed metadata of U-Pb dating sessions ("Metadata_UPb.xlsx") and all Tera-Wasserburg plots ("TeraWasserburgs.png"). A 'ReadMe" is available for the abbreviations.Ce fichier contient le matériel complémentaire de l'article intitulé « FACTORS INFLUENCING EARLY AND LATE DIAGENESIS IN CENOZOIC MARINE, PALUSTRINE AND LACUSTRINE CARBONATES OF THE PARIS BASIN (FRANCE) » de Moreau et al. Il comprend une synhtèse de tous les échantillons de cette étude (« Sample_list.xlsx »), leur localisation et la liste des analyses effectuées, les données isotopiques (Isotopes_Data.xlsx), les métadonnées détaillées des sessions de datation U-Pb (« Metadata_UPb.xlsx ») et les diagrammes Tera-Wasserburg (« TeraWasserburgs.png »). Un fichier 'ReadMe' est disponible pour les abréviations
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
Influence of sequence stratigraphy and diagenesis on the modelling of 3D reservoir carbonates : implications for the development of geothermal energy in the Paris Basin
No full textRésumé : La France fait face, comme de nombreux pays, à la nécessité de décarboner l'énergie qu'elle consomme, notamment la chaleur. Le Bassin de Paris a une forte densité de population dans la région de l'Ile-de-France et dispose de réservoirs intéressants pour la géothermie de basse énergie exploitant l'eau géothermale entre 300 m et 2500 m de profondeur, pour une utilisation directe de chaleur. Les formations carbonatées du Jurassique moyen situées entre 1200 m et 1800 m constituent une cible principale. Cependant, la densité importante de puits exploitant ce réservoir et l'échec récent d'un puits vers Evry montre qu'il existe un risque non négligeable et non quantifié, de faible débit d'eau ou encore d'interférence entre doublets géothermiques dans des zones urbaines à forte densité d'infrastructures. Ce risque géologique constitue un obstacle au développement futur de la géothermie en Ile-de-France. L'optimisation de l'utilisation de la géothermie nécessite une connaissance accrue de l'hétérogénéité du réservoir en termes de porosité/perméabilité ou de connectivité du réservoir. L'objectif de la thèse est de construire un modèle géologique 3D détaillé des hétérogénéités sédimentologiques, diagenétiques et pétrophysiques intégrant toutes les données de puits disponibles et permettant de réduire le risque géologique. Une base de données numérique rassemblant les données diagraphiques et pétrophysiques de 168 puits a été constituée sur un géomodelleur. Cette base de données a été complétée par l'observation de 129 m de carottes et 191 lames minces. Il en résulte une modélisation 3D à haute résolution (12,2 millions de cellules de 100 m x 100 m de côté et 3,7 m en verticale), proposant la répartition spatiale des faciès, porosité et perméabilité. L'étude de lames minces montre que la diagénèse joue un rôle important sur l'hétérogénéité des porosités, en particulier le développement ou non de calcite de blocage, ou encore des phénomènes de dolomitisation et de sa dissolution. Un analogue à l'affleurement a permis de mieux comprendre la répartition des faciès dans un cadre de stratigraphie séquentielle bien contraint (séquences de 3ème ordre). L'utilisation de drone pour photographier une carrière (échelle infra-kilométrique) couplée à la modélisation photogrammétrique a permis de travailler sur un affleurement numérique dans l'Yonne, analogue au réservoir géothermique. A partir de cet affleurement numérique, une méthodologie a été développée afin de le travailler sur un géomodelleur, et ainsi de mieux comprendre la répartition des faciès et des propriétés pétrophysiques à une plus fine échelle. La modélisation 3D du réservoir dans une partie de l'Ile-de-France et d'un analogue à l'affleurement permet de mieux prédire et comprendre la répartition des propriétés du réservoir et de dé-risquer les futurs opérations (comme celle de Grigny vers Evry).Abstract: France, like many countries, is facing the need to reduce the carbon dioxide production related to the energy consumption, particularly for heating. The Paris Basin is densely populated in the Île-de-France region and has interesting potential reservoirs for low-enthalpy geothermal energy exploiting geothermal waters between 300 m and 2500 m depth, for district heating. The carbonate formations of the Middle Jurassic located between 1200 m and 1800 m are a main target. However, the high density of wells exploiting this reservoir and the recent failure of a well near Evry show that there is a non-negligible and unquantified risk of low water flow or interference between geothermal doublets in urban areas with a high density of infrastructures. This geological risk constitutes an obstacle to the future development of geothermal energy in Île-de-France. Optimizing the use of geothermal energy requires an increased knowledge of the heterogeneity of the reservoir in terms of porosity/permeability or reservoir connectivity. The objective of the thesis is to build a detailed 3D geological model of sedimentological, diagenetic and petrophysical heterogeneities integrating all available well data and allowing to reduce geological risk. A database of logging and petrophysical data from 168 wells was compiled. This database was supplemented with 129 m of core samples and 191 thin sections. The result is a high-resolution 3D model (12.2 million cells of 100 m x 100 m sides and 3.7 m height, proposing the spatial distribution of facies, porosity and permeability. Thin section studies show that diagenesis plays an important role in the heterogeneity of porosity, in particular the development or not of blocking calcite, or dolomitization and dissolution phenomena. An outcrop analogue provided a better understanding of the distribution of facies in a well constrained sequence stratigraphy framework (3rd order sequences). The use of a drone to photograph a quarry in the Yonne (sub-kilometer scale) coupled with photogrammetric modelling enabled work on a digital outcrop, analogous to the geothermal reservoir. From this digital outcrop, a methodology was developed to work on a geomodeller, and thus to better understand the distribution of facies and petrophysical properties at a finer scale. The 3D modelling of the reservoir in a part of Île-de-France and of an outcrop analogue allows to better predict and understand the distribution of the reservoir properties and to de-risk future operations (such as Grigny near Evry)
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
Author-wise bibliometric analysis based on entropy.
No full textAuthor-wise bibliometric analysis based on entropy.</p
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