1,720,959 research outputs found
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
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
Dispelling the Myths Behind First-author Citation Counts
Full text linkWe 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
Étude d'une micro-décharge à cathode creuse pour la production d'azote atomique Application au dépôt de nitrure de bore
No full textThe aim of the thesis is to contribute to the better understanding of micro-hollow cathode discharges (MHCD) and their application to the production of atomic nitrogen for boron nitride synthesis. First, a parametric study of the MHCD in an argon/nitrogen gas mixture, is performed, with a cross-comparison of both kinetic modeling of the discharge and plasma diagnostics, in order to identify the parameters controlling the production of atomic nitrogen in the hole of the MHCD. Then, ways to extend the plasma volume of the MHCD are studied, the goal being the synthesis of boron nitride over large circular surfaces (5 cm in diameter). Adding a pressure differential between the two sides of the MHCD creates a jet which effectively transports atomic nitrogen over long distances and adding a positive continuous polarization of the substrate allows for a homogenous density of atomic nitrogen over a large surface. Finally, the application to the deposition of boron nitride is studied, exploring the impact of different parameters on the characteristics of deposited films. In particular, amorphous boron nitride films are characterized, and their transferability is studied for their integration in electronic devices.L’objectif de cette thèse est de contribuer à la compréhension du fonctionnement des microdécharges à cathode creuse (MHCD) et leur potentiel d’application à la production d’azote atomique pour le dépôt de nitrure de bore. Dans un premier temps, une étude paramétrique de la source MHCD, fonctionnant en mélange argon/azote, est réalisée, par une approche croisée de modélisation et de diagnostics plasma, afin de déterminer les paramètres contrôlant la production de l’azote atomique dans le trou de la MHCD. Dans une deuxième partie, les possibilités d’expansion du volume plasma de la MHCD sont explorées, dans l’objectif de réaliser des dépôts de nitrure de bore sur de grandes surfaces circulaires (5 cm de diamètre). L’ajout d’un différentiel de pression entre les deux côtés de la MHCD permet de créer un jet qui transporte efficacement les atomes d’azote sur de longue distance et la présence d’une polarisation continue positive dusubstrat permet d’obtenir une densité homogène d’azote atomique sur une grande surface. Enfin, l’application au dépôt de nitrure de bore est étudiée, avec une étude exploratoire des différents paramètres de dépôt et leur impact sur les caractéristiques des films déposés. En particulier, des films de nitrure de bore amorphe sont caractérisés et leur transfert est étudié pour leur intégration dans des dispositifs électroniques
Étude d'une micro-décharge à cathode creuse pour la production d'azote atomique Application au dépôt de nitrure de bore
No full textThe aim of the thesis is to contribute to the better understanding of micro-hollow cathode discharges (MHCD) and their application to the production of atomic nitrogen for boron nitride synthesis. First, a parametric study of the MHCD in an argon/nitrogen gas mixture, is performed, with a cross-comparison of both kinetic modeling of the discharge and plasma diagnostics, in order to identify the parameters controlling the production of atomic nitrogen in the hole of the MHCD. Then, ways to extend the plasma volume of the MHCD are studied, the goal being the synthesis of boron nitride over large circular surfaces (5 cm in diameter). Adding a pressure differential between the two sides of the MHCD creates a jet which effectively transports atomic nitrogen over long distances and adding a positive continuous polarization of the substrate allows for a homogenous density of atomic nitrogen over a large surface. Finally, the application to the deposition of boron nitride is studied, exploring the impact of different parameters on the characteristics of deposited films. In particular, amorphous boron nitride films are characterized, and their transferability is studied for their integration in electronic devices.L’objectif de cette thèse est de contribuer à la compréhension du fonctionnement des microdécharges à cathode creuse (MHCD) et leur potentiel d’application à la production d’azote atomique pour le dépôt de nitrure de bore. Dans un premier temps, une étude paramétrique de la source MHCD, fonctionnant en mélange argon/azote, est réalisée, par une approche croisée de modélisation et de diagnostics plasma, afin de déterminer les paramètres contrôlant la production de l’azote atomique dans le trou de la MHCD. Dans une deuxième partie, les possibilités d’expansion du volume plasma de la MHCD sont explorées, dans l’objectif de réaliser des dépôts de nitrure de bore sur de grandes surfaces circulaires (5 cm de diamètre). L’ajout d’un différentiel de pression entre les deux côtés de la MHCD permet de créer un jet qui transporte efficacement les atomes d’azote sur de longue distance et la présence d’une polarisation continue positive dusubstrat permet d’obtenir une densité homogène d’azote atomique sur une grande surface. Enfin, l’application au dépôt de nitrure de bore est étudiée, avec une étude exploratoire des différents paramètres de dépôt et leur impact sur les caractéristiques des films déposés. En particulier, des films de nitrure de bore amorphe sont caractérisés et leur transfert est étudié pour leur intégration dans des dispositifs électroniques
Author-wise bibliometric analysis based on entropy.
No full textAuthor-wise bibliometric analysis based on entropy.</p
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