1,720,967 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
Strong automorphisms of regular Courant algebroids
No full textLes algébroïdes de Courant ont été introduits par T. J. Courant dans sa thèse portant sur l’intégrabilité des structures de Dirac. Ils sont devenus d’importants objets en géométrie différentielle depuis le travail de Z.-J. Liu, A. Weinstein et P. Xu sur les bigébroïdes de Lie. Ils jouent un rôle grandissant en physique théorique ainsi qu’en mathématiques. Dans cette thèse, on s’intéresse à décrire les automorphismes forts d’un algébroïde de Courant régulier. Dans une première partie des rappels sont faits sur les algébroïdes de Lie. Dans une seconde partie, on étudie les algébroïdes de Courant. Dans une troisième partie, après introduction de la notion de dissection, nous explicitons le groupe des automorphismes forts d’un algébroïde de Courant régulier relativement à une dissection, et calculons l’algèbre de Lie des automorphismes infinitésimaux relativement à cette dissection. De cette étude sont apparues de nouvelles symétries qui pourraient s’avérer utiles en physique théorique.Courant algebroids have been introduced by T. J. Courant in his PhD thesis concerning the integrability of Dirac structures. They have become important objects in differential geometry since the seminal work of Z.-J. Liu, A. Weinstein and P. Xu on Lie bialgebroids. They play an increasing role in theoretical physics as well as inmathematics. In this thesis, we are interested by describing strong automorphisms of a regular Courant algebroid. In a first part, we review Lie algebroids. In a second part, we study Courant algebroids. In a third part, after introducing the notion of dissection, we compute the automorphism group of a regular Courant algebroid with respect to a dissection of it, and then compute the Lie algebra of infinitesimal automorphisms with respect to this dissection. From this work appeared new symmetries that could be useful in theoretical physics
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
Automorphismes forts des algébroïdes de Courant réguliers
No full textCourant algebroids have been introduced by T. J. Courant in his PhD thesis concerning the integrability of Dirac structures. They have become important objects in differential geometry since the seminal work of Z.-J. Liu, A. Weinstein and P. Xu on Lie bialgebroids. They play an increasing role in theoretical physics as well as inmathematics. In this thesis, we are interested by describing strong automorphisms of a regular Courant algebroid. In a first part, we review Lie algebroids. In a second part, we study Courant algebroids. In a third part, after introducing the notion of dissection, we compute the automorphism group of a regular Courant algebroid with respect to a dissection of it, and then compute the Lie algebra of infinitesimal automorphisms with respect to this dissection. From this work appeared new symmetries that could be useful in theoretical physics.Les algébroïdes de Courant ont été introduits par T. J. Courant dans sa thèse portant sur l’intégrabilité des structures de Dirac. Ils sont devenus d’importants objets en géométrie différentielle depuis le travail de Z.-J. Liu, A. Weinstein et P. Xu sur les bigébroïdes de Lie. Ils jouent un rôle grandissant en physique théorique ainsi qu’en mathématiques. Dans cette thèse, on s’intéresse à décrire les automorphismes forts d’un algébroïde de Courant régulier. Dans une première partie des rappels sont faits sur les algébroïdes de Lie. Dans une seconde partie, on étudie les algébroïdes de Courant. Dans une troisième partie, après introduction de la notion de dissection, nous explicitons le groupe des automorphismes forts d’un algébroïde de Courant régulier relativement à une dissection, et calculons l’algèbre de Lie des automorphismes infinitésimaux relativement à cette dissection. De cette étude sont apparues de nouvelles symétries qui pourraient s’avérer utiles en physique théorique
Author-wise bibliometric analysis based on entropy.
No full textAuthor-wise bibliometric analysis based on entropy.</p
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