1,720,965 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
Aspects non-perturbatifs des petites théories des cordes
No full textString theory is a well-established framework for describing quantum gravity, and it also provides insights into supersymmetric gauge theories. A common approach involves studying the low-energy limit of the worldvolume theory of a stack of D-branes, resulting in, for instance, four-dimensional gauge theories. Alternatively, string theory predicts the existence of non-local non-gravitational theories in six-dimensions which are known as little string theories. These theories provide a rich framework for investigating string theory and gauge theories as non-local extensions of supersymmetric gauge theories. This thesis focuses on the non-perturbative aspects of a specific class of little string theories, known as A-type little string theories. We demonstrate that their BPS partition function, which encodes the non-perturbative information of the theory, can be decomposed into modular building blocks. This decomposition facilitates the study of particular limits of the partition function, revealing recursive structures. Furthermore, we identify non-trivial symmetries of the partition function that do not respect the non-perturbative expansion. These symmetries are derived by examining the extended Kähler moduli space of the theory and are validated using the vertex operator algebraic reformulation of the partition function. The partition function can be further extended to include codimension-2 surface defects. We construct the defect partition function and show that it preserves the same symmetries as the defect-free case. Additionally, we investigate the regularity of the defect partition function and demonstrate its factorization in the Nekrasov-Shatashvili limit. Finally, we study the Seiberg-Witten curves associated with a different class of little string theories, the D-type little string theories. By leveraging symmetry and modularity arguments, we constrain the possible forms of these curves and explore their properties and dualities with other theories.La théorie des cordes est un cadre bien établi pour décrire la gravité quantique, et elle fournit également des informations sur les théories de jauge supersymétriques. Une approche courante consiste à étudier la limite basse énergie de la théorie contenu dans un empilement de D-branes, ce qui donne lieu, par exemple, à des théories de jauge en quatre dimensions. Alternativement, la théorie des cordes prédit l'existence de théories non locales non gravitationnelles en six dimensions, connues sous le nom de petites théories des cordes. Ces théories offrent un cadre riche pour explorer la théorie des cordes et les théories de jauge comme des extensions non locales des théories de jauge supersymétriques. Cette thèse se concentre sur les aspects non perturbatifs d'une classe spécifique de théories des petites cordes, connues sous le nom de théories des petites cordes de type A. Nous démontrons que leur fonction de partition BPS, qui encode les informations non perturbatives de la théorie, peut être décomposée en blocs modulaires. Cette décomposition facilite l'étude de limites particulières de la fonction de partition, révélant des structures récursives. D'autre part, nous identifions des symétries non triviales de la fonction de partition qui ne respectent pas le développement non perturbatif. Ces symétries sont dérivées en examinant l'espace des modules de Kähler étendu de la théorie et sont validées à l'aide d'une reformulation algébrique en terme d'opérateurs vertex de la fonction de partition. La fonction de partition peut être étendue pour inclure des défauts de surface de codimension 2. Nous construisons la fonction de partition avec défauts et montrons qu'elle préserve les mêmes symétries que dans le cas sans défauts. D'autre part, nous examinons la régularité de la fonction de partition avec défauts et démontrons sa factorisation dans la limite de Nekrasov-Shatashvili. Enfin, nous étudions les courbes de Seiberg-Witten associées à une autre classe de petites théories des cordes, les petites théories des cordes de type D. En exploitant des arguments de symétrie et de modularité, nous contraignons les formes possibles de ces courbes et explorons leurs propriétés ainsi que leurs dualités avec d'autres théories
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
Aspects non-perturbatifs des petites théories des cordes
No full textString theory is a well-established framework for describing quantum gravity, and it also provides insights into supersymmetric gauge theories. A common approach involves studying the low-energy limit of the worldvolume theory of a stack of D-branes, resulting in, for instance, four-dimensional gauge theories. Alternatively, string theory predicts the existence of non-local non-gravitational theories in six-dimensions which are known as little string theories. These theories provide a rich framework for investigating string theory and gauge theories as non-local extensions of supersymmetric gauge theories. This thesis focuses on the non-perturbative aspects of a specific class of little string theories, known as A-type little string theories. We demonstrate that their BPS partition function, which encodes the non-perturbative information of the theory, can be decomposed into modular building blocks. This decomposition facilitates the study of particular limits of the partition function, revealing recursive structures. Furthermore, we identify non-trivial symmetries of the partition function that do not respect the non-perturbative expansion. These symmetries are derived by examining the extended Kähler moduli space of the theory and are validated using the vertex operator algebraic reformulation of the partition function. The partition function can be further extended to include codimension-2 surface defects. We construct the defect partition function and show that it preserves the same symmetries as the defect-free case. Additionally, we investigate the regularity of the defect partition function and demonstrate its factorization in the Nekrasov-Shatashvili limit. Finally, we study the Seiberg-Witten curves associated with a different class of little string theories, the D-type little string theories. By leveraging symmetry and modularity arguments, we constrain the possible forms of these curves and explore their properties and dualities with other theories.La théorie des cordes est un cadre bien établi pour décrire la gravité quantique, et elle fournit également des informations sur les théories de jauge supersymétriques. Une approche courante consiste à étudier la limite basse énergie de la théorie contenu dans un empilement de D-branes, ce qui donne lieu, par exemple, à des théories de jauge en quatre dimensions. Alternativement, la théorie des cordes prédit l'existence de théories non locales non gravitationnelles en six dimensions, connues sous le nom de petites théories des cordes. Ces théories offrent un cadre riche pour explorer la théorie des cordes et les théories de jauge comme des extensions non locales des théories de jauge supersymétriques. Cette thèse se concentre sur les aspects non perturbatifs d'une classe spécifique de théories des petites cordes, connues sous le nom de théories des petites cordes de type A. Nous démontrons que leur fonction de partition BPS, qui encode les informations non perturbatives de la théorie, peut être décomposée en blocs modulaires. Cette décomposition facilite l'étude de limites particulières de la fonction de partition, révélant des structures récursives. D'autre part, nous identifions des symétries non triviales de la fonction de partition qui ne respectent pas le développement non perturbatif. Ces symétries sont dérivées en examinant l'espace des modules de Kähler étendu de la théorie et sont validées à l'aide d'une reformulation algébrique en terme d'opérateurs vertex de la fonction de partition. La fonction de partition peut être étendue pour inclure des défauts de surface de codimension 2. Nous construisons la fonction de partition avec défauts et montrons qu'elle préserve les mêmes symétries que dans le cas sans défauts. D'autre part, nous examinons la régularité de la fonction de partition avec défauts et démontrons sa factorisation dans la limite de Nekrasov-Shatashvili. Enfin, nous étudions les courbes de Seiberg-Witten associées à une autre classe de petites théories des cordes, les petites théories des cordes de type D. En exploitant des arguments de symétrie et de modularité, nous contraignons les formes possibles de ces courbes et explorons leurs propriétés ainsi que leurs dualités avec d'autres théories
Author-wise bibliometric analysis based on entropy.
No full textAuthor-wise bibliometric analysis based on entropy.</p
- …
