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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
University of Southampton Fluid-Structure Interactions Group OpenFOAM research
No full textAn overview is given of current research in maritime CFD using the open source flow solver OpenFoam through examples of unsteady propulsors representations, free surface capture and hull-propulsor-rudder interaction for energy efficient shipping. Fundamental unsteady flow as hydroacoustic sources on a 2D foil is also solved
Using an inflow turbulence generator for leading edge noise predictions
No full textInflow turbulence noise is often the dominant noise mechanism in turbomachines. It has been shown that the sound pressure level is related to the intensity and integral length scale of the turbulence. We utilise a methodology for generating turbulence with prescribed intensity and length scales within a detached eddy simulation. This is applied to a case of homogeneous isotropic turbulence impinging on a non-symmetric aerofoil at high Reynolds number (210000). The sound pressure level is estimated using Curle’s compact acoustic analogy, and compared to experimental data and analytical estimates. The intensity of the inflow turbulence is higher than expected, though it exhibits approximately homogeneous and isotropic characteristics. While the general shape of the predicted noise spectrum is correct, the magnitude differs from the experimental results by up to 17 dB. Reasons for this are elaborated, and improved predictions based on a flat plate are presented
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
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