1,721,082 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
Direct and large-eddy simulation of turbulent wall-bounded flows : further development of a parallel solver, improvement of multiscale subgrid models and investigation of vortex pairs in ground effect
No full textThis thesis is devoted to the numerical simulation of turbulent wall-bounded flows. Their accurate prediction is still challenging because of the nature of turbulence which is characterized by a very broad range of time and length scales. Therefore, fully resolved simulations of turbulent flows, called Direct Numerical Simulations (DNS), are unaffordable for practical applications but are an important research tool, since they provide a detailed insight into the physics of turbulence at moderate Reynolds numbers. In this thesis, direct simulations are used to study the interaction of a vortex pair with a wall and, more specifically, the development of instabilities which eventually lead to the turbulent decay of the system. That study is part of an important research effort devoted to aircraft wake vortices. The Reynolds number of the DNS is however much lower than that of aircraft wake vortices. This calls for investigations at higher Reynolds numbers using the Large-Eddy Simulation (LES) technique, which consists in simulating as small turbulent structures as the grid allows while modeling the effect of the unresolved scales using a subgrid-scale model. Performing LES of wake vortices in ground effect requires a subgrid-scale model that can handle both vortical flows and wall-bounded flows. The second part of this thesis deals with the development of such models. The proposed approach is based on the Regularized Variational Multiscale (RVM) model which is known to handle properly vortical flows thanks to its good spectral behavior. It is however shown in this thesis that the existing RVM model is not suitable for wall-bounded flows. New wall-adapting multiscale models are here obtained by using wall-adapting viscosity scalings in the regularized multiscale formalism. These models are successfully assessed in a turbulent channel flow and in a more complex test case consisting in a turbulent half channel with blowing and suction, in order to generate a non-uniform pressure gradient in the streamwise direction.(FSA 3) -- UCL, 200
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
Aérodynamique d’une voiture transportant un vélo muni d’une housse de protection
No full textLe transport de vélos par des particuliers sur de longues distances se fait actuellement principalement en voiture. De nombreux systèmes permettant d’attacher des vélos à l’extérieur d’un véhicule existent sur le marché, ainsi que des housses de protection pour préserver ceux-ci des intempéries. La société SnakeSkin, fondée par M. Floymont et M. Théate, prévoit de concevoir et produire des housses de protection de vélo haut de gamme pour leur transport en voiture. Ayant déjà un prototype (figure 1), ils sont intéressés à l’étude du transport d’un vélo de course muni d’une de leurs bâches, attaché à un porte-vélo venant se fixer sur le dispositif d’attelage de la voiture. Leur but est de pouvoir quantifier les efforts que subit le porte-vélo, ainsi que d’avoir une estimation de la traînée additionnelle que provoque le transport de ce vélo bâché. Ce mémoire vise donc à calculer les forces et moments en jeu, et à analyser l’influence qu’ont plusieurs paramètres choisis sur ces efforts. Premièrement la distance entre le vélo et la voiture. Les porte-vélos sur le marché ont souvent plusieurs positions disponibles pour fixer le vélo. Quel impact la distance entre la voiture et le vélo a-t-elle ? Trois positions sur le porte-vélo ont été mesurées sur un modèle existant et sont étudiées. Ensuite la vitesse de la voiture : Comment la diminution de celle-ci impacte-t-elle les forces subies par le vélo et la voiture ? Enfin à quel point le modèle de la voiture influence-t-il les résultats ? L’étude s’est penchée sur trois types de véhicules différents : — Un SUV (Audi SQ5 2013). — Une citadine (VW Golf 2016) — Une berline (Toyota Corolla 2016) Afin d’étudier l’écoulement autour des corps que sont la voiture et la housse de protection, des simulations en deux dimensions ont tout d’abord été réalisées avec le logiciel ANSYS Fluent. Peu chères en temps de calcul, elles permettent une première étude des efforts en jeu par unité de profondeur. Des simulations en trois dimensions ont ensuite été produites avec le même logiciel. Celles-ci sont beaucoup plus coûteuses mais elles produisent des résultats beaucoup plus réalistesMaster [120] : ingénieur civil mécanicien, Université catholique de Louvain, 201
Author-wise bibliometric analysis based on entropy.
No full textAuthor-wise bibliometric analysis based on entropy.</p
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