1,721,017 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
Orientations and bijections for toroidal maps with prescribed face-degrees and essential girth
No full textInternational audienceWe present unified bijections for maps on the torus with control on the face-degrees and essential girth (girth of the periodic planar representation). A first step is to show that for d ≥ 3 every toroidal d-angulation of essential girth d can be endowed with a certain 'canonical' orientation (formulated as a weight-assignment on the half-edges). Using an adaptation of a construction by Bernardi and Chapuy, we can then derive a bijection between face-rooted toroidal d-angulations of essential girth d (with the condition that, apart from the root-face contour, no other closed walk of length d encloses the root-face) and a family of decorated unicellular maps. The orientations and bijections can then be generalized, for any d ≥ 1, to toroidal face-rooted maps of essential girth d with a root-face of degree d (and with the same root-face contour condition as for d-angulations), and they take a simpler form in the bipartite case, as a parity specialization. On the enumerative side we obtain explicit algebraic expressions for the generating functions of rooted essentially simple trian-gulations and bipartite quadrangulations on the torus. Our bijective constructions can be considered as toroidal counterparts of those obtained by Bernardi and the first author in the planar case, and they also build on ideas introduced by Despré, Gonçalves and the second author for essentially simple triangulations, of imposing a balancedness condition on the orientations in genus 1
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
Étude unifiée des cartes planaires pondérées par blocs : propriétés combinatoires et probabilistes
No full textCette thèse étudie des classes de cartes planaires avec un poids de Boltzmann u>0 sur certaines composantes, que nous appelons blocs. Avec Fleurat, nous étudions la décomposition des cartes planaires génériques en composantes 2-connexes, révélant ainsi une phase de transition entre la classes d'universalité des cartes (convergeant vers la sphère brownienne) et celle des arbres plans (convergeant vers l'arbre brownien). Dans le cas critique, nous identifions une nouvelle classe d'université avec l'arbre stable de paramètre 3/2 comme limite d'échelle. De plus, nous obtenons des résultats précis sur la taille des blocs dans chaque phase. Ensuite, je montre qu'il est possible d'étudier un grand nombre de schémas de décomposition d'une manière similaire, afin de mettre en évidence une transition de phase. J'explique comment obtenir des résultats énumératifs, les tailles des blocs et les limites d'échelle pour chaque phase. La robustesse de la méthode et son application dans différents cas sont au cœur de mon travail. Enfin, avec Albenque et Fusy, nous avons étudié les cartes boisées aléatoires décomposées en blocs 2-connexes boisés, où un arbre couvrant est tiré en même temps que la carte. Ce modèle, qui présente un intérêt en physique théorique, montre de nouveaux comportements. Malgré la complexité introduite par le fait que les séries génératrices D-finie ou D-algébriques, nous arrivons à déterminer le comportement asymptotique des cartes boisées 2-connexes, et à mettre en évidence une transition de phase, dont nous étudions les propriétésThis thesis focuses on classes of planar maps with a Boltzmann weight u>0 on certain components called blocks. In collaboration with Fleurat, we study the decomposition of generic planar maps into 2-connected components, revealing a transition phase between the universality classes of maps (converging to the Brownian sphere) and plane trees (converging to the Brownian tree). We identify a new class with the stable tree of parameter 3/2 as the scaling limit in the critical case, and obtain precise results on block sizes in each phase. In a subsequent work, I show that it is possible to study a lot of decomposition schemes along similar lines to shed light on a phase transition. I explain how to obtain enumerative results, block sizes and scaling limits for each phase. Indeed, the robustness of the method and its application in different cases is a main focus of my work. Finally, with Albenque and Fusy, we studied tree-rooted random planar maps decomposed into tree-rooted 2-connected blocks, where a spanning tree is drawn simultaneously with the map. This model, which is of interest in theoretical physics, shows new behaviours. Despite the complexity introduced by the generating series being D-finite and D-algebraic, we determine the asymptotic behaviour of 2-connected tree-rooted maps, reveal a phase transition, and study the properties of each phas
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
Author-wise bibliometric analysis based on entropy.
No full textAuthor-wise bibliometric analysis based on entropy.</p
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