1,720,972 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
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
A uniqueness result for a translation invariant problem in the calculus of variations
No full textWe present a uniqueness result of uniformly continuous solutions for a general minimization problem in the Calculus of Variations. We minimize the functional I λ (u) := Ω φ(∇u)+λu with φ a convex but not necessarily strictly convex function, Ω an open set of R N with N ∈ N * and λ ∈ R. The proof is based on the two following main points : the functional I λ is invariant under translations and we assume that the function φ is not affine on any non-empty open set. This provides a shorter proof and/or an extension for some already known uniqueness results for functionals of the type I λ that are presented in the article
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
Propriétés qualitatives de solutions de problèmes dégénérés et/ou singuliers en calcul des variations
No full textThis thesis belongs in the fields of calculus of variations, elliptic partial differential equations and geometric measure theory. In the first chapter, we prove a uniqueness result for the solutions of a minimization problem of the form ʃΩφ(∇u)-λu with λ a constant function. The autonomy of this functional allows us to use translations of solutions as in [29] to prove that there is at most one uniformly continuous minimizer. In the second chapter, we consider a convex function φ as the one in [8] which is not differentiable at the origin and λ a Lipschitz continuous function. The proof of the uniqueness in this case relies on a study of the regularity of level sets. In the third chapter, we work with another φ introduced in [41] which is not strictly convex on several sets. We prove a uniqueness result in dimension two based again on a study of level lines and on a maximum principle for ∇φ(∇u) with u a minimizer. In the fourth chapter, we are interested in the regularity of weak solutions of degenerate elliptic partial differential equations of the form div G(∇u) = ƒ. In dimension two when ƒ is a constant we present some results on the continuity of G(∇u) under various growth assumptions on G. We also establish an extension of [57] by enlarging the degeneracy zone of G.Cette thèse s'inscrit dans les domaines du calcul des variations, des équations aux dérivées partielles elliptiques et de la théorie géométrique de la mesure. Dans le premier chapitre, nous prouvons un résultat d'unicité des solutions pour un problème de minimisation de la forme ʃΩφ(∇u)-λu avec λ une fonction constante. L'autonomie de cette fonctionnelle nous permet d'effectuer des translations de solutions comme dans [29] pour montrer qu'il existe au plus un minimiseur uniformément continu. Dans le deuxième chapitre, nous considérons une fonction convexe φ comme celle présente dans [8] n'étant pas différentiable à l'origine et λ une fonction lipschitzienne. La preuve de l'unicité dans ce cas là repose sur une étude de la régularité des ensembles de niveau. Dans le troisième chapitre, on travaille avec un autre φ introduit dans [41] qui n'est pas strictement convexe sur plusieurs ensembles. Nous prouvons un résultat d'unicité en dimension deux reposant encore une fois sur une étude des lignes de niveau et sur un principe du maximum pour ∇φ(∇u) avec u un minimiseur. Dans le quatrième chapitre, nous nous intéressons à la régularité des solutions faibles d'équations aux dérivées partielles elliptiques dégénérées de la forme div G(∇u) = ƒ. En dimension deux quand ƒ est une constante nous présentons des résultats sur la continuité de G(∇u) sous diverses hypothèses de croissance sur G. Nous établissons aussi une extension de [57] en élargissant la zone de dégénérescence de G
Author-wise bibliometric analysis based on entropy.
No full textAuthor-wise bibliometric analysis based on entropy.</p
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