1,721,152 research outputs found
Numerical modelling of unsteady spray behaviour in moderately high-pressure regime
No full textThe present study is mainly motivated to develop an unsteady computational code that simulates a transient behaviour of the spray injected into a moderately high-pressure environment. The moderately high-pressure regime is introduced to minimize some of the complexities that arise from considering the high pressure. In order to represent the spray development, the DDM (discrete droplet model), which is often identified as the PSIC (particle-source-in-cell) model, is employed among the SF (separate flow) models. Here, the Eulerian-Lagrangian formulation is used to analyse the two-phase interactions. For an accurate prediction of droplet evaporation rate in a high-pressure environment, a proper high-pressure evaporation model is applied using thermodynamic and phase equilibrium conditions. Also, the effects of high pressure as well as high temperature are considered in the calculation of liquid and gas properties. Throughout the numerical simulation, a transient thermo-fluid mechanical behaviour of spray in a high-pressure environment is traced and visualized while its physical meaning is discussed in comparison with the case for normal pressure. Regarding the evaporation of spray, the effect of interactions between droplets is examined in comparison with the case for single droplet.This work was supported by grant No. R01-2006-000-11311-0 from the Basic Research Program of the Korea Science & Engineering Foundation
Numerical Analysis on the DeNox Characteristics of NH3-SCR Diesel After-Treatment System
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
Prediction of Regenerating Characteristics in Diesel Particulate Filter - Numerical Analysis of Diesel Particulate Filter Performance
No full textIntravitreal injection of bevacizumab and gas for diabetic premacular hemorrhage with active fibrovascular proliferation.
No full textVariations 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
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