1,720,959 research outputs found
Ottimizzazione sperimentale e numerica di una voluta a spirale di un ventilatore centrifugo mediante l’uso di algoritmi evolutivi e strutture adattative
No full textOTTIMIZZAZIONE NUMERICA DI UN COMPRESSORE ASSIALE MEDIANTE L'IMPIEGO DI ALGORITMI EVOLUTIVI E METODI DI ANALISI STATISTICA
No full textThree-dimensional inverse design of axial compressor stator blade using neural-networks and direct Navier-Stokes solver
No full text
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
Comparison of Body-Fitted and Fictitious Domain approach for CFD prediction of geometric incertanties by Polynomial Chaos using modeFRONTIER
No full textOptimization of a Boomerang shape using modeFRONTIER
No full textThe paper describes the optimization of a boomerang, simulating its trajectory by a dynamic model coupled to CFD analysis to compute aerodynamic coefficients. The optimization process flow and formulation is built within the commercial process integration and optimization software modeFRONTIER. The design variables involved are primarily the geometric parameters to change the shape of the boomerang. To steer the complete process of optimization, from variables variation to performance evaluation, modeFRONTIER is coupled to Catia v5 software for geometry modification and mass properties evaluation, to MATLAB for dynamic simulation, and to the commercial Computational Fluid Dynamics (CFD) tool Star-CCM+ for aerodynamic analysis. In addition, dedicated RSM (Response Surfaces Methods), available in modeFRONTIER, are used to extrapolate the aerodynamic coefficients as a function of the angle of incidence and velocity, as required by the dynamic model, through a reduced number of CFD analyses (database) for each geometric configuration. Different design simulations are therefore executed automatically by modeFRONTIER following a dedicated optimization strategy, until the optimal configuration of the boomerang is found, accordingly to the specified requirements, such as minimum energy required for the launch, maximum accuracy in returning, and a guaranteed minimum range. The physical complexity of this, apparently simple, problem, and the not standard application case, has been selected as an interesting benchmark that can be disclosed in full to test the multi-objective and multi-disciplinary capabilities of the optimization environment modeFRONTIER
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