1,720,967 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
Etude expérimentale de la turbulence intégrable en eau peu profonde
Get PDFIn the present PhD program, we will focus on the case of 1D surface gravity waves. This situation is related to the case of the swell observed in the ocean that shows usually a quasi unidirectional propagation. Wave turbulence in 1D shows fundamental particularities that are somewhat exotic depending on whetherthe wave propagation is uni or bi directional. Energy can cascade towards small scales or in contrast to large scales;weak turbulence can become unstable and lead to formation of solitons... Wave turbulence in 1D is a potentially veryrich framework related to oceanic issues.During this PhD, the graduatestudent will have to setup experiments in the 1D wave flume of theLEGI. This flume is 36 m long and it is currently used to study the sedimentdynamics in the vicinity of the shore(see picture). The student willdevelop a new scheme to generate and control the waves and a 2Dimagingsystem to record the free surface displacementin a way that isresolved both in time and space. For control purposes, additional ultrasoniclocal measurements of the surface displacement will be performed. Itwill then be possible to study in a very fine way, the weak or strong non-linearcouplings between waves, and perform advanced comparisons betweentheory and experiments. The student will also be associated to the otherstudies of the WATU project, in particular to share the measurement and data analysis techniques and so that to compare results among various configurations.La turbulence d'onde est un état statistique impliquant un grand nombre d'ondes couplées par effet non linéaire. Cet état générique est potentiellement décrit, dans la limite de faible non linéarité, par la théorie de la turbulence faible. Cette théorie prédit un phénoménologie proche de celle de la turbulence hydrodynamique avec en particulier une cascade d'énergie au travers des échelles. La thèse de doctorat se concentrera sur le cas d'ondes de gravité-capillarité à la surface d'un fluide dans la limite des grandes longueurs d'onde. Ce système est potentiellement représentatif d'états de mer lorsque la houle est développée. Des expériences seront menées dans le canal à Houle 1D de 36m du LEGI. Le cas des ondes unidirectionnelles est assez particulier dans le cadre général de la théorie de la turbulence faible. En effet il est prédit que la turbulence faible est instable dans ces conditions et que l'on devrait observer plutôt l'apparence de structures cohérentes de type soliton. Au cours de cette thèse, on testera différentes conditions de forçage pour tester les prédictions théoriques concernant les cascades d'énergie et de quantité de mouvement. On sortira également du cadre strict de la théorie pour étudier des régimes de forçage fort ou de faible profonde
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
Experimental study of integrable turbulence in shallow water
No full textLa turbulence d'onde est un état statistique impliquant un grand nombre d'ondes couplées par effet non linéaire. Cet état générique est potentiellement décrit, dans la limite de faible non linéarité, par la théorie de la turbulence faible. Cette théorie prédit un phénoménologie proche de celle de la turbulence hydrodynamique avec en particulier une cascade d'énergie au travers des échelles. La thèse de doctorat se concentrera sur le cas d'ondes de gravité-capillarité à la surface d'un fluide dans la limite des grandes longueurs d'onde. Ce système est potentiellement représentatif d'états de mer lorsque la houle est développée. Des expériences seront menées dans le canal à Houle 1D de 36m du LEGI. Le cas des ondes unidirectionnelles est assez particulier dans le cadre général de la théorie de la turbulence faible. En effet il est prédit que la turbulence faible est instable dans ces conditions et que l'on devrait observer plutôt l'apparence de structures cohérentes de type soliton. Au cours de cette thèse, on testera différentes conditions de forçage pour tester les prédictions théoriques concernant les cascades d'énergie et de quantité de mouvement. On sortira également du cadre strict de la théorie pour étudier des régimes de forçage fort ou de faible profondeuIn the present PhD program, we will focus on the case of 1D surface gravity waves. This situation is related to the case of the swell observed in the ocean that shows usually a quasi unidirectional propagation. Wave turbulence in 1D shows fundamental particularities that are somewhat exotic depending on whetherthe wave propagation is uni or bi directional. Energy can cascade towards small scales or in contrast to large scales;weak turbulence can become unstable and lead to formation of solitons... Wave turbulence in 1D is a potentially veryrich framework related to oceanic issues.During this PhD, the graduatestudent will have to setup experiments in the 1D wave flume of theLEGI. This flume is 36 m long and it is currently used to study the sedimentdynamics in the vicinity of the shore(see picture). The student willdevelop a new scheme to generate and control the waves and a 2Dimagingsystem to record the free surface displacementin a way that isresolved both in time and space. For control purposes, additional ultrasoniclocal measurements of the surface displacement will be performed. Itwill then be possible to study in a very fine way, the weak or strong non-linearcouplings between waves, and perform advanced comparisons betweentheory and experiments. The student will also be associated to the otherstudies of the WATU project, in particular to share the measurement and data analysis techniques and so that to compare results among various configurations
Author-wise bibliometric analysis based on entropy.
No full textAuthor-wise bibliometric analysis based on entropy.</p
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