1,721,015 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
Complexes de fer pour les batteries à circulation avec médiateurs redox : une double approche de criblage expérimental et computationnel
No full textLes batteries à flux redox avec médiateurs sont une alternative émergente à l'architecture traditionnelle des batteries à flux redox qui offrent une densité énergétique améliorée grâce à l'ajout d'un solide électroactif. Cette thèse est centrée sur le criblage de complexes de fer en tant que médiateurs d'oxydoréduction de négolyte dans les systèmes neutres aqueux par une double approche expérimentale et computationnelle. Les complexes de fer(III) ont été caractérisés par voltampérométrie cyclique et spectroscopie UV-Visible. Parmi les complexes synthétisés, huit ont montré un comportement quasiréversible et ont été utilisés pour identifier un protocole DFT pour prédire leurs potentiels de réduction. Le niveau de théorie M02-2X/6-311+G(d)/COSMO-RS a produit les erreurs les plus faibles, avec une erreur moyenne de 0,066 V pour l'ensemble initial de complexes et une erreur moyenne de 0,22 V pour un ensemble généralisé comprenant différents centres métalliques. Le comportement en cyclage du maltolate de fer a été démontré dans une cellule RFB par rapport à l'hexacyanure de fer. La cellule a montré une bonne stabilité lorsqu'elle a été cyclée dans une boîte à gants sous N2 avec une efficacité coulombique de 99,7 % et une diminution de capacité de 1,9 % par jour. La cellule présentait une résistance interne élevée ; la capacité s'affaiblissant de manière réversible lors de cyclages à des densités de courant plus élevées. La stabilité des espèces oxydées et réduites a été vérifiée en introduisant des pauses à la fin de la charge et de la décharge. Enfin, l'encapsulation de NTP à l'aide du frittage par plasma flash et sa réaction ex-situ de ciblage redox avec le complexe de fer-TIRON ont été étudiées dans le cadre d'une étude de prospectiveTargeting redox flow batteries (RTFB) are an emerging alternative to traditional redox flow battery architecture which offer improved energy density via an added electroactive solid. This Ph.D. thesis is centered around the screening for iron(III)-organic complexes as negolyte redox mediators in aqueous neutral RTFBs by a dual experimental-computational screening approach. First, iron(III) complexes were characterized using cyclic voltammetry and UV-Visible spectroscopy. Of the synthesized complexes, eight showed quasireversible behavior and were used to identify a suitable DFT protocol for predicting their reduction potentials. The M02-2X/6-311+G(d)/COSMO-RS level of theory yielded the smallest errors, with an MAE of 0.066 V for the initial set of complexes and an MAE of 0.22 V for a generalized set including different metal centers. The cycling behavior of the iron maltolate complex was demonstrated vs. iron hexacyanide. The cell showed good stability when cycled in an N2 glove box with a CE of 99.7% and a capacity decay of 1.9 % per day. The cell had a high internal resistance, as the capacity reversibly faded upon cycling at higher current densities. The stability of both oxidized and reduced species was verified by introducing holds at the end of charge and discharge. Finally, the encapsulation of sodium titanium phosphate using spark-plasma sintering and its ex-situ redox targeting reaction with the iron TIRON complex was explored as a perspective stud
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
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