1,721,009 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
Morphodynamique d'un banc de galets en rivière aménagée lors de crues
No full textThis work deals with the morphodynamics of a gravel bar in an engineered mountain stream, the River Arc (France). The analysis is based on field measurements during three reservoir releases and a natural high flow event. Original methods have been used and improved (LS-PIV and analysis of aerial pictures). The evolution of suspended sediments along the river is described according to observations during flushing flows. Morphological changes of the studied gravel bar were analysed for the four events, and for in-between time periods. Over the time of the study, the bar was strengthened, even if the flushings and the flood induced opposit changes and transverse channels were deeply eroded. Deposits of fine sediments have been estimated on the entire surface of the gravel bar.Moreover numerical modelling owing to Rubar20TS has been performed to calculate flow fields and sediment transport during a flushing event and during the flood. Qualitatively, calculated morphological changes agree with measurements.Ce travail porte sur la morphodynamique d'un banc de galets en rivière de montagne aménagée, l'Arc (Maurienne, France). L'analyse s'appuie sur des observations de terrain détaillées menées lors de trois chasses de dégravage et d'une crue naturelle. Des méthodes de suivi innovantes ont été exploitées et améliorées (LS-PIV et analyse de photographies aériennes). A partir des observations expérimentales, une description du transfert des matières en suspension dans le cours d'eau est proposée pour les chasses. Les modifications morphologiques du banc de galets sont interprétées sur les quatre épisodes de débit important, mais aussi sur les périodes inter-événements. Au cours du temps, un renforcement du banc est observé, malgré les effets d'érosion/dépôt antagonistes des événements, crue ou chasse, et des érosions marquées de chenaux de jonction transversaux à la surface du banc. Les dépôts de sédiments fins à la surface du banc ont été évalués. D'autre part, des modélisations numériques bidimensionnelles avec le code Rubar20TS ont étéutilisées pour modéliser les écoulements hydro-sédimentaires pour une chasse et une crue naturelle. Les modifications morphologiques calculées pour une chasse sont qualitativement proches de celles observées
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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