1,720,983 research outputs found
Éditorial
No full textPittet Christophe. Éditorial. In: Revue des sciences sociales, N°42, 2009. Étrange étranger. p. 1
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
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
Ergodic theorems, group actions and unitary representations
No full textDans cette thèse, nous étudions d'abord la notion de discrépance, qui mesure le taux de convergence des moyennes ergodiques. Nous démontrons des estimations pour la discrépance d'actions sur la sphère, le tore et le shift de Bernoulli, ainsi que pour des actions de groupes localement compacts ; nous démontrons une inégalité qui permet de situer la discrépance dans le cas des actions de groupes dans le cadre général des méthodes de Monte-Carlo. Nous considérons ensuite l'action du groupe libre sur le bord de l'arbre de Cayley qui lui est associé. Nous démontrons un théorème ergodique pour certaines moyennes pondérées pour cette action, qui ne préserve que la classe des mesures naturelles sur ce bord. Nous retrouvons ainsi l'irréductibilité de la représentation unitaire associée à l'action. La troisième thématique concerne la propriété de Howe-Moore. Les groupes qui la vérifient ont la propriété que toutes leurs actions ergodiques sont automatiquement mélangeantes, mais cette propriété n'est pas stable par produit direct. Nous proposons une généralisation de la propriété de Howe-Moore, qui passe par une axiomatisation du phénomène de Mautner, qui permet d'étudier le cas des produits. Enfin, nous montrons que tous les réseaux héritent de la propriété de décroissance rapide radiale, et nous donnons l'exemple explicite d'un groupe discret, muni d'une fonction de longueur naturelle, quasi-isométrique à une longueur des mots, qui possède la propriété RRD, mais pas la propriété RDIn this thesis, we first study the notion of discrepance, which measures the rate of convergence of ergodic means. We prove estimations for the discrepancy of actions on the sphere, the torus and the Bernoulli shift, as well as for actions of locally compact groups. Moreover, we prove an inequality that allows us to locate these discrepancies in the larger framework of the Monte-Carlo method. We consider the action of the free group on the boundary of its Cayley tree. We prove a convergence theorem of some means associated with this action, that only preserves the class of the natural measures on this boundary. We recover the previously known result that the unitary representation associated to it is irreducible. We then investigate the Howe-Moore property. Groups that satisfy it have the property that whenever they act ergodically on some probability space, then the action is mixing ; unfortunately, this property is not stable by direct products. We formulate a generalization of the Howe-Moore property, relying on an axiomatization of the Mautner phenomenon, that allows us to treat the case of products. Finally, we prove that every lattice inherits the radial rapid decay property, and give an explicit example of a discrete group, endowed with a natural length function which is quasi-isometric to a word-length, that has RRD but doesn't have R
On some aspects of property RD for Poisson-Furstenberg boundary representations.
No full textNous étudions la propriété RD en terme de décroissance de coefficients matriciels de représentations unitaires. Nous nous concentrons en particulier sur des représentations provenant de l'action des groupes de Lie et de groupes discrets sur un "bord" approprié. Ces actions produisent des rerésentations unitaires à normalisation prés. Nous utilisons des techniques d'analyse harmonique et de théorie ergodique pour amorcer une nouvelle approche de la conjecture de Valette.We study property RD in terms of decay of matrix coefficients for unitary representations. We focus our attention on unitary representations arising from action of Lie groups and discrete groups of isometries of a CAT(-1) space on their appropriate boundary. We use some techniques of harmonic analysis, and ergodic theory to start a new approach of Valette's conjectur
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