1,721,003 research outputs found
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
koamabayili/VECTRON-author-checklist: VECTRON author checklist
No full textWe have done our best to complete the author checklist relating to the use of animals in the hut study. Note that the objective for the hut study was to evaluate the IRS treatment applications for residual efficacy against Anopheles mosquitoes, including the local An. coluzzii mosquito population. Cows were only used to attract mosquitoes into the huts and no tests were carried out directly on the cows. The author checklist is intended for use with studies where experiments are carried out on animals, which is why we have had such difficulty in completing this for the hut study, as many of the questions do not relate to how the cows were used
Author-wise bibliometric analysis based on entropy.
No full textAuthor-wise bibliometric analysis based on entropy.</p
Flame transfer function and disturbance energies in gaseous reacting flows
Get PDFThe general objective of this thesis is to extend the understanding of combustion instabilities by testing models, physical concepts and numerical procedures, and by providing new numerical post-processing tools to do so. Flame transfer function (FTF) : four different methods for the determination of flame transfer functions (FTFs) in LES have been tested. A new method based on the forcing of the flame by a filtered white noise is used to obtain the FTF at all frequencies with only one unsteady LES. Disturbance energies and stability criteria in reacting flows : two stability criteria in reacting flows are derived. The first one extends teh Rayleigh criterion by taking into account the influence of the heat flux fluctuation. The second criterion is nonlinear and is based on the analysis of the budjet of a newly derived nonlinear disturbance energy during a controled thermo-acoustic instabilit
Modélisation de la turbulence et de l'acoustique dans les écoulements compressibles complexes à l'aide de la théorie, la simulation aux grandes échelles et l'apprentissage automatique.
No full textChapter 3 : Combustion noise modeling: This chapter describes in more details my contributions regarding combustion noise. The question of the modeling of the Flame Transfer Functions (FTF) for the analysis of thermoacoustic stability maps is first adressed. Results concerning the analytical modeling of indirect combustion noise as well as the optimal design implications are then presented. Finally, the work devoted to the derivation and analysis of disturbance energies in reacting flows is summarized.Chapter 4 : Broadband rotor noise modeling: Fan noise sources are presented as well as the LMFA testing facility hosting the ECL5 Fan/OGV stage configuration. After a quick summary of the numerical setup for LES, the numerous results obtained through numerical analysis are described. Namely, the impact on the acoustics of a recirculation bubble is presented. The tip gap region is analyzed through its peculiar aerodynamic and aeroacoustic behavior. Finally, the 360 results are confronted to the experiments.Chapter 5 : Turbulence in dense gas flows modeling: In this chapter, after a brief introduction to the specifics of dense gas flows, DNS of academic flows involving dense gases are presented. The peculiar features of turbulence in Homogeneous Isotropic Turbulence (HIT) and compressible mixing layer are analyzed. The behavior of SubGrid-Scale (SGS) terms is explored through a-priori filtering and through the analysis of the performance of existing SGS model. New SGS models are developed using machine learning techniques (especially Artificial Neural Networks). Their merits are analyzed a-priori and a-posteriori using experimental results from Cambridge University
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