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
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
Validité et courbe d'apprentissage du simulateur de chirurgie robotique dV-Trainer® : résultats de l'étude multicentrique internationale MED-FRS
No full textObjectifs.— Les simulateurs sont des outils validés en chirurgie
robotique mais aucun standard n’est clairement défini pour leur
utilisation. Le but de cette étude est d’aider au choix des exer cices les plus pertinents pour une évaluation et une formation grâce
à l’analyse de la reproductibilité, des courbes d’apprentissage et
de la validité de tous les exercices disponibles sur le simulateur
dV-Trainer®.
Méthodes.— Évaluation prospective multicentrique internationale
d’avril 2011 à mars 2012, incluant un groupe de chirurgiens robo tiques (plus de 20 interventions) et un groupe de novices (moins
de 2 heures de chirurgie robotique et/ou de simulation). Tous les
exercices (n = 29) et tous les critères (n = 11) proposés sur le simu lateur étaient inclus. La validité subjective, i.e. validité évidente
et validité de contenu était testée à l’aide de questionnaires. La
validité objective, i.e. validité de construction, reproductibilité
des scores et courbes d’apprentissage était analysée à partir des
données extraites du logiciel de simulation.
Résultats.— Vingt et un chirurgiens robotiques et 28 novices, âgés de
26 à 58 ans étaient inclus. La validité subjective était élevée pour la
plupart des exercices. Les scores globaux des chirurgiens robotiques
étaient significativement supérieurs à ceux des novices : 67,8 ± 15 %
versus 54,4 ± 14 % (p < 0,001). Dans l’analyse détaillée, cette dif férence n’était retrouvée que pour 14 exercices et 4 critères. La
reproductibilité des scores était acceptable (coefficient de Pearson,
R > 0,7) pour 15 exercices. Les courbes d’apprentissage retrouvaient
une progression satisfaisante pour 13 exercices.
Conclusion.— Ce travail offre une base de données objective pour
éclairer le choix des exercices d’un futur curriculum de type Fun damentals of Robotic Surgery « FRS » tel qu’il est souhaité par les
sociétés savantes. Sept exercices semblent pertinents pour une éva luation standardisée et 9 pour une formation aux gestes de bases en
chirurgie robotique
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