1,720,981 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
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
Méthodes hybrides d'ordre élevé pour la mécanique des solides non-linéaire
No full textIn this thesis, we are interested in the devising of Hybrid High-Order (HHO) methods for nonlinear solid mechanics. HHO methods are formulated in terms of face unknowns on the mesh skeleton. Cell unknowns are also introduced for the stability and approximation properties of the method. HHO methods offer several advantages in solid mechanics: \textit{(i)} primal formulation; \textit{(ii)} free of volumetric locking due to incompressibility constraints; \textit{(iii)} arbitrary approximation order ; \textit{(iv)} support of polyhedral meshes with possibly non-matching interfaces; and \textit{(v)} attractive computational costs due to the static condensation to eliminate locally cell unknowns while keeping a compact stencil. In this thesis, primal HHO methods are devised to solve the problem of finite hyperelastic deformations and small plastic deformations. An extension to finite elastoplastic deformations is also presented within a logarithmic strain framework. Finally, a combination with Nitsche's approach allows us to impose weakly the unilateral contact and Tresca friction conditions. Optimal convergence rates of order are proved in the energy-norm. All these methods have been implemented in both the open-source library DiSk++ and the open-source industrial software code_aster. Various two- and three-dimensional benchmarks are considered to validate these methods and compare them with -conforming and mixed finite element methods.Dans cette thèse, nous nous intéressons aux développements des méthodes hybrides d'ordre élevé (Hybrid High-Order, HHO, en anglais) pour la mécanique des solides non-linéaire. Les méthodes HHO sont formulées en termes d'inconnues de face portées par le squelette du maillage et d'inconnues dans les cellules qui sont ajoutées pour des raisons d'approximation et de stabilité de la méthode. Ces méthodes présentent de nombreux avantages dans le cadre de la mécanique des solides~: \textit{(i)} formulation primale~; \textit{(ii)} suppression du verrouillage numérique dû aux problèmes d'incompressibilité~; \textit{(iii)} ordre d'approximation arbitraire ~; \textit{(iv)} utilisation de maillages polyédriques avec des interfaces possiblement non-conformes~; et \textit{(v)} coûts numériques attractifs grâce à la condensation statique qui permet d'éliminer les inconnues portées par les cellules tout en maintenant un stencil compact. Dans cette thèse, des méthodes HHO en version primale sont développées pour résoudre le problème des grandes déformations hyperélastiques et des petites déformations plastiques. Une extension aux grandes déformations plastiques est ensuite présentée en utilisant le cadre des déformations logarithmiques. Enfin, un couplage avec une approche de type Nitsche a permis de traiter le problème du contact unilatéral de Signorini avec frottement de Tresca. Des taux de convergence optimaux en ont été prouvés en norme d'énergie. L'ensemble de ces méthodes ont été implémentées à la fois dans la librairie open-source DiSk++ et dans le code de calcul industriel open-source code_aster. De nombreux cas-tests bi- et tridimensionnels ont été réalisés afin de valider ces méthodes et de les comparer par rapport aux méthodes éléments finis -conformes et mixtes
Méthodes hybrides d'ordre élevé pour la mécanique des solides non-linéaire
Full text linkIn this thesis, we are interested in the devising of Hybrid High-Order (HHO) methods for nonlinear solid mechanics. HHO methods are formulated in terms of face unknowns on the mesh skeleton. Cell unknowns are also introduced for the stability and approximation properties of the method. HHO methods offer several advantages in solid mechanics: \textit{(i)} primal formulation; \textit{(ii)} free of volumetric locking due to incompressibility constraints; \textit{(iii)} arbitrary approximation order ; \textit{(iv)} support of polyhedral meshes with possibly non-matching interfaces; and \textit{(v)} attractive computational costs due to the static condensation to eliminate locally cell unknowns while keeping a compact stencil. In this thesis, primal HHO methods are devised to solve the problem of finite hyperelastic deformations and small plastic deformations. An extension to finite elastoplastic deformations is also presented within a logarithmic strain framework. Finally, a combination with Nitsche's approach allows us to impose weakly the unilateral contact and Tresca friction conditions. Optimal convergence rates of order are proved in the energy-norm. All these methods have been implemented in both the open-source library DiSk++ and the open-source industrial software code_aster. Various two- and three-dimensional benchmarks are considered to validate these methods and compare them with -conforming and mixed finite element methods.Dans cette thèse, nous nous intéressons aux développements des méthodes hybrides d'ordre élevé (Hybrid High-Order, HHO, en anglais) pour la mécanique des solides non-linéaire. Les méthodes HHO sont formulées en termes d'inconnues de face portées par le squelette du maillage et d'inconnues dans les cellules qui sont ajoutées pour des raisons d'approximation et de stabilité de la méthode. Ces méthodes présentent de nombreux avantages dans le cadre de la mécanique des solides~: \textit{(i)} formulation primale~; \textit{(ii)} suppression du verrouillage numérique dû aux problèmes d'incompressibilité~; \textit{(iii)} ordre d'approximation arbitraire ~; \textit{(iv)} utilisation de maillages polyédriques avec des interfaces possiblement non-conformes~; et \textit{(v)} coûts numériques attractifs grâce à la condensation statique qui permet d'éliminer les inconnues portées par les cellules tout en maintenant un stencil compact. Dans cette thèse, des méthodes HHO en version primale sont développées pour résoudre le problème des grandes déformations hyperélastiques et des petites déformations plastiques. Une extension aux grandes déformations plastiques est ensuite présentée en utilisant le cadre des déformations logarithmiques. Enfin, un couplage avec une approche de type Nitsche a permis de traiter le problème du contact unilatéral de Signorini avec frottement de Tresca. Des taux de convergence optimaux en ont été prouvés en norme d'énergie. L'ensemble de ces méthodes ont été implémentées à la fois dans la librairie open-source DiSk++ et dans le code de calcul industriel open-source code_aster. De nombreux cas-tests bi- et tridimensionnels ont été réalisés afin de valider ces méthodes et de les comparer par rapport aux méthodes éléments finis -conformes et mixtes
Author-wise bibliometric analysis based on entropy.
No full textAuthor-wise bibliometric analysis based on entropy.</p
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