1,721,527 research outputs found
Dataset supporting the publication "Effects of surface roughness on the propulsive performance of pitching foils"
No full textThis dataset is supporting the publication Vilumbrales Garcia, R et al (2024) "Effects of surface roughness on the propulsive performance of pitching foils" Journal of Fluid Mechanics. https://doi.org/10.1017/jfm.2023.1009
The dataset contains the excel files that relate to each of the figures within the paper:
Fig2, Fig3, Fig4, Fig5, Fig6, Fig7
The data highlight that the effect of roughness on dynamic systems is very different than that on static systems, thereby, cannot be accounted for by only using information obtained from static cases. This also indicates that the performance of unsteady, flapping systems is more robust to the changes in surface roughness.
The data is accessible via license CC BY
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Naturalization record of Garcia, Rodrigo
No full textThe naturalization certificate for Rodrigo Garcia of Cuba. Signed by Judge Barron Phillips
Flow past flapping foils: Surface texture and unsteadiness effects
No full textEvolution has lead to extremely efficient biological swimmers and flyers. Animals are able to use the surrounding flow to obtain performance gains, like in the fish-schooling operation. Although nowadays their way of traveling is being replicated in mechanical systems, such as Micro Air Vehicles or energy harvesters, we are still far from achieving their efficiency. In this thesis we aim to advance towards more efficient propulsive methods. We mimic the fish-schooling operation by the use of tandem flapping foils, and we explore real-life aspects that could influence the hydrodynamics performance. Do animals present surface texture for propulsive performance reasons? How does the unsteadiness in the surrounding flow affect the performance of a flapping foil? In this thesis we aim to answer those questions by conducting numerical simulations and experiments. We find that the addition of surface texture (36\% and 70\% coverage area) is prejudicial for a pure pitching foil. As for the second question, we explore the importance of adding physically relevant inputs to recover the dynamics of a flapping foil submerged inside unsteady incoming flow, and executing transitions in its motion. We later use the recovered force model to predict the path that maximises its propulsive performance. We finish by focusing on more efficient ways of developing the transition motion, finding that the optimal manoeuvre is associated with a more efficient evolution of the transition velocities
REQUESENS, Lluís de, Bernat MIQUEL, Martí GARCIA, Rodrigo DIES, Lluís de VILA-RASA, Francesc SUNYER: Sis poetes del regnat d'Alfons el Magnànim, Jaume Torró (ed.), Barcelona: Editorial Barcino, 2009; «Els Nostres Clàssics», B29
No full textObra ressenyada: Lluís de REQUESENS, Bernat MIQUEL, Martí GARCIA, Rodrigo DIES, Lluís de VILA-RASA, Francesc SUNYER, Jaume TORRÓ (ed.), Sis poetes del regnat d'Alfons el Magnànim. Barcelona: Editorial Barcino, 2009
REQUESENS, Lluís de, Bernat MIQUEL, Martí GARCIA, Rodrigo DIES, Lluís de VILA-RASA, Francesc SUNYER: Sis poetes del regnat d'Alfons el Magnànim, Jaume Torró (ed.), Barcelona: Editorial Barcino, 2009; «Els Nostres Clàssics», B29
Get PDFObra ressenyada: Lluís de REQUESENS, Bernat MIQUEL, Martí GARCIA, Rodrigo DIES, Lluís de VILA-RASA, Francesc SUNYER, Jaume TORRÓ (ed.), Sis poetes del regnat d'Alfons el Magnànim. Barcelona: Editorial Barcino, 2009
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
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