1,721,010 research outputs found
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
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
Le système éolien Pléistocène supérieur de la vallée du Rhône (sud-est de la France).
No full textFor almost a century, thick Pleistocene aeolian deposits have been recognised in the southern branch of the Western European Cenozoic Rift, i.e. the lower Rhone Valley and the valleys of the Alpine tributaries. The loess, disconnected from the two main European aeolian systems (the North European Loess Belt and the Danube basin), constitute a key record for documenting the evolution of the peri-Mediterranean glacial palaeoenvironments. Loess is characterized by a coarse texture (main mode around 60 μm), polymodal grain-size distribution, strong local thickness (>5 m), limited extension, high carbonate content and abundant bioturbation. This results from the persistence of a shrub vegetal cover during the coldest and driest phases of the Last Glacial that allowed for trapping the saltating and suspended particles close to the alluvial sources. At the European scale, the geochemical composition of loess changes according to regions, but remains consistent within each catchment. Such variability is mostly related to the composition of rocks outcropping in glaciated areas within the respective catchments. A sedimentological and chronostratigraphic investigation was carried out on two loess-palaeosols sections: the Collias section (~8 m thick), which records the whole last climatic cycle, and the Lautagne section (4 m thick), which provides a detailed record of the Upper Pleniglacial. At a regional scale, the time of loess deposition ranges from 37.5 ka to 12 ka, with a peak at ~28–24 ka, overlapping the maximal advance of the Alpine Ice Sheet. This strongly suggests that regional glacier dynamics was the main driver of loess sedimentation by modulating the production of particles likely to be transported by deflation.Depuis presque un siècle, d’importants dépôts éoliens pléistocènes ont été reconnus dans la branche méridionale du rift cénozoïque ouest-européen, i.e. la basse vallée du Rhône et celles de ses affluents alpins. Ces lœss, déconnectés des deux principaux systèmes éoliens européens (la ceinture lœssique nord-européenne et le bassin du Danube), constituent un enregistrement clé pour documenter l’évolution des paléoenvironnements glaciaires péri-méditerranéens. L’étude de leur répartition spatiale couplée à une analyse sédimentologique et géochimique a montré que leurs principales caractéristiques (mode grossier autour de 60 µm, distribution granulométrique polymodale, taux de carbonate élevé, épaisseur localement importante (> 5 m), distribution spatiale discontinue et bioturbation abondante) peuvent être expliquées par la persistance d’un couvert végétal arbustif dans un contexte climatique moins rigoureux que celui des régions nordiques, permettant la capture simultanée des particules transportées par saltation et par suspension depuis les sources alluviales. À l’échelle européenne, la composition géochimique des lœss varie d’une région à l’autre mais garde une certaine homogénéité au sein d’un même bassin versant. Nos résultats suggèrent que cette variabilité est principalement contrôlée par la lithologie des zones englacées. Une analyse multi-proxy et chronostratigraphique à haute résolution a été réalisée sur deux séquences de lœss-paléosols : la séquence de Collias (~ 8 m) qui couvre la quasi-totalité du dernier cycle glaciaire et celle de Lautagne (~ 4 m) qui fournit un enregistrement détaillé du Pléniglaciaire supérieur. À l’échelle régionale, la principale période de sédimentation éolienne a été datée entre 37,5 ka et 12 ka avec un maximum de sédimentation entre 26 ka et 25 ka, synchrone de l’avancée maximale de la calotte alpine. Ce résultat suggère que les fluctuations des glaciers ont été le principal moteur de l’accumulation lœssique en modulant la production de particules susceptibles d’être transportées par la déflation
Author-wise bibliometric analysis based on entropy.
No full textAuthor-wise bibliometric analysis based on entropy.</p
The Late Pleistocene aeolian system of the Rhône Valley (southeast France).
No full textDepuis presque un siècle, d’importants dépôts éoliens pléistocènes ont été reconnus dans la branche méridionale du rift cénozoïque ouest-européen, i.e. la basse vallée du Rhône et celles de ses affluents alpins. Ces lœss, déconnectés des deux principaux systèmes éoliens européens (la ceinture lœssique nord-européenne et le bassin du Danube), constituent un enregistrement clé pour documenter l’évolution des paléoenvironnements glaciaires péri-méditerranéens. L’étude de leur répartition spatiale couplée à une analyse sédimentologique et géochimique a montré que leurs principales caractéristiques (mode grossier autour de 60 µm, distribution granulométrique polymodale, taux de carbonate élevé, épaisseur localement importante (> 5 m), distribution spatiale discontinue et bioturbation abondante) peuvent être expliquées par la persistance d’un couvert végétal arbustif dans un contexte climatique moins rigoureux que celui des régions nordiques, permettant la capture simultanée des particules transportées par saltation et par suspension depuis les sources alluviales. À l’échelle européenne, la composition géochimique des lœss varie d’une région à l’autre mais garde une certaine homogénéité au sein d’un même bassin versant. Nos résultats suggèrent que cette variabilité est principalement contrôlée par la lithologie des zones englacées. Une analyse multi-proxy et chronostratigraphique à haute résolution a été réalisée sur deux séquences de lœss-paléosols : la séquence de Collias (~ 8 m) qui couvre la quasi-totalité du dernier cycle glaciaire et celle de Lautagne (~ 4 m) qui fournit un enregistrement détaillé du Pléniglaciaire supérieur. À l’échelle régionale, la principale période de sédimentation éolienne a été datée entre 37,5 ka et 12 ka avec un maximum de sédimentation entre 26 ka et 25 ka, synchrone de l’avancée maximale de la calotte alpine. Ce résultat suggère que les fluctuations des glaciers ont été le principal moteur de l’accumulation lœssique en modulant la production de particules susceptibles d’être transportées par la déflation.For almost a century, thick Pleistocene aeolian deposits have been recognised in the southern branch of the Western European Cenozoic Rift, i.e. the lower Rhone Valley and the valleys of the Alpine tributaries. The loess, disconnected from the two main European aeolian systems (the North European Loess Belt and the Danube basin), constitute a key record for documenting the evolution of the peri-Mediterranean glacial palaeoenvironments. Loess is characterized by a coarse texture (main mode around 60 μm), polymodal grain-size distribution, strong local thickness (>5 m), limited extension, high carbonate content and abundant bioturbation. This results from the persistence of a shrub vegetal cover during the coldest and driest phases of the Last Glacial that allowed for trapping the saltating and suspended particles close to the alluvial sources. At the European scale, the geochemical composition of loess changes according to regions, but remains consistent within each catchment. Such variability is mostly related to the composition of rocks outcropping in glaciated areas within the respective catchments. A sedimentological and chronostratigraphic investigation was carried out on two loess-palaeosols sections: the Collias section (~8 m thick), which records the whole last climatic cycle, and the Lautagne section (4 m thick), which provides a detailed record of the Upper Pleniglacial. At a regional scale, the time of loess deposition ranges from 37.5 ka to 12 ka, with a peak at ~28–24 ka, overlapping the maximal advance of the Alpine Ice Sheet. This strongly suggests that regional glacier dynamics was the main driver of loess sedimentation by modulating the production of particles likely to be transported by deflation
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