1,721,052 research outputs found
Numerical study of transition between the two operating modes of dual bell nozzles, AIAA Paper 2002-3989
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Effect of Wall Shape and Real Gas Properties on Dual Bell Nozzle Flowfield, AIAA Paper 2005-3943
No full textNumerical Investication of Chemical Kinetics Effects In Nozzles for Winged Launchers
No full textThe nozzle performances in many air breathing propulsive devices proposed for
high speed flight are strongly influenced by the nonequilibrium phenomena. In
particular the two-dimensional gasdynamic effects have an important role, since
they may significantly affect the evolution of the reaction mechanism, and thus
determin the prediction of the chemical energy released to the flow and
available for thrust.
In this paper axisymmetric plug nozzles are analyzed by means of a
nonequilibrium flow model. They display strong unsymmetrical flow behaviours,
which yield very peculiar consequences on the evolution of chemical kinetics.
Significant displacements are reported between the prediction of the propulsive
parameters obtained by using a non-reacting flow model with respect to the
chemical nonequilibrium model
Numerical study of transition between the two operating modes of dual bell nozzles, AIAA Paper 2002-3989
No full textEffect of Wall Shape and Real Gas Properties on Dual Bell Nozzle Flowfield, AIAA Paper 2005-3943
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
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