1,720,961 research outputs found
Le rôle des modèles judiciaires dans l'élaboration du discours balzacien
No full textFarrant T. J. Le rôle des modèles judiciaires dans l'élaboration du discours balzacien. In: Cahiers de l'Association internationale des études francaises, 1992, n°44. pp. 177-189
A cell boundary element method applied to laminar vortex-shedding from arrays of cylinders in various arrangements
No full textA cell boundary element method is used to solve the two-dimensional incompressible Navier–Stokes equation for vortex-shedding flows around arrays of cylinders. The method is a hybrid scheme using a boundary element method in each fluid cell discretization with a finite element procedure to solve for the global fluid problem. Computations are presented of two-dimensional flow characteristics and interactive forces associated with flows around four equispaced cylinders of equal diameter, and two cylinders, one with circular cross-section and the other elliptical. It was found that behaviour such as in-phase vortex-shedding, anti-phase vortex shedding and synchronized vortex shedding, which are well-known characteristics for flows past arrangements of two circular cylinders, were also present in these more complicated flows. The application of the cell boundary element method to these flow problems, using an unstructured fluid domain mesh idealization, proved straightforward and required no modification for variation of the number of bodies or their shape
Detection of change in shape and its relation to part structure
No full textUsing a change detection paradigm (Barenholtz, E., Cohen, E. H., Feldman, J., & Singh, M. (2003). Detection of change in shape: An advantage for concavities. Cognition, 89(1) 1-9), we measured sensitivity to the changes of shapes and in particular the difference between detecting a new convex or concave vertex. We conclude that concave vertices per se are not more salient, but changes in the sequence of convexities and concavities along a contour are salient. We argue that these changes are likely to signal a change in perceived part structure. © 2005 Elsevier B.V. All rights reserved
A cell boundary element method applied to laminar vortex shedding from circular cylinders
Full text linkThe two-dimensional unsteady incompressible Navier–Stokes equations are solved for flows around arrangements of circular cylinders at Reynolds number 100 and 200. A hybrid boundary element/finite element method is used to discretise the spatial domain together with a second order implicit finite difference approximation in time. The numerical scheme of study is validated for a uniform stream past an isolated circular cylinder by comparing findings with experimental and numerical studies. Both steady state and time dependent solutions were predicted with good agreement. The numerical approach, known here as the cell boundary element method (cell BEM), was also used to solve flows around two cylinders of equal diameter side by side and in tandem. It was found that no modifications to the method were needed to compute the flow field for these connected domains. In-phase and anti-phase vortex shedding modes were found to exist in the flow simulation. These simulations were in excellent agreement with phenomena observed in experiments. Particle simulations, generated from the cell BEM velocity fields, were found to have great similarity with smoke visualisations from experiment
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
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