1,720,957 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
Vers la radiodétection autonome des rayons cosmiques de très haute énergie
Get PDFThe radiodetection of extensive air showers, investigated for the first time in the 1960's, obtained promising results but plagued by the technical limitations. At that time, H.R. Allan summed up the state of the art in an extensive review article whose conclusions and predictions are still used today. Set up in 2001 at the Nancay Observatory, the CODALEMA experiment was built first as a demonstrator and successfully showed the feasibility of the radiodetection of extensive air showers. Radically modified in 2005, it allowed to obtain a clear energy correlation, and put in evidence an unambiguous signature of the geomagnetic origin of the electric field emission process associated to the air shower. The switch towards large areas is the next step of the technique's development. Therefore, the autonomy of the detectors becomes essential. After test prototypes installed in 2006 at the Pierre Auger Observatory, a generation of new autonomous detectors was developed. Their first results will be presented. This work is also dedicated to the issues related to the radiodetection technique : the antenna response, the sensitivity, the surrounding effects, the monitoring of a big array. The determination of the shower characteristics independently of other detectors such as the lateral distribution, the energy correlation and the frequency spectrum of the radio transient will be discussed.Étudiée pour la première fois dans les années 60, la technique de radiodétection des gerbes atmosphériques montra des résultats prometteurs mais limités par les capacités techniques de l'époque. H.R.Allan synthétisa alors l'ensemble des connaissances dans une revue extensive dont les conclusions et les prédictions font encore référence aujourd'hui. L'expérience CODALEMA a été conçue en 2001 à l'observatoire de Nançay, d'abord comme un démonstrateur de la faisabilité de la technique de radiodétection des rayons cosmiques. Modifiée en profondeur en 2005, elle a permis de mettre en place une première corrélation en énergie et de prouver sans ambiguïté la prépondérance du champ magnétique terrestre dans l'émission radio de la gerbe. Le passage à de grandes surfaces de détection est la prochaine étape du développement de la technique. L'autonomie des détecteurs devient alors un élément crucial. Précédée de prototypes de tests installés en 2006 au sein de l'observatoire Pierre Auger, une nouvelle génération de détecteurs a depuis été développée et ses résultats sont détaillés. Cette thèse traite également des différentes problématiques liées à la technique de radiodétection : réponse d'antenne, sensibilité, impact de l'environnement, surveillance d'une expérience à grande échelle. La détermination, indépendamment d'un autre détecteur, des caractéristiques de la gerbe est discutée notamment la distribution latérale, la corrélation en énergie et la composition en fréquence du signal radio
Vers la radiodétection autonome des rayons cosmiques de très haute énergie
No full textThe radiodetection of extensive air showers, investigated for the first time in the 1960's, obtained promising results but plagued by the technical limitations. At that time, H.R. Allan summed up the state of the art in an extensive review article whose conclusions and predictions are still used today. Set up in 2001 at the Nancay Observatory, the CODALEMA experiment was built first as a demonstrator and successfully showed the feasibility of the radiodetection of extensive air showers. Radically modified in 2005, it allowed to obtain a clear energy correlation, and put in evidence an unambiguous signature of the geomagnetic origin of the electric field emission process associated to the air shower. The switch towards large areas is the next step of the technique's development. Therefore, the autonomy of the detectors becomes essential. After test prototypes installed in 2006 at the Pierre Auger Observatory, a generation of new autonomous detectors was developed. Their first results will be presented. This work is also dedicated to the issues related to the radiodetection technique : the antenna response, the sensitivity, the surrounding effects, the monitoring of a big array. The determination of the shower characteristics independently of other detectors such as the lateral distribution, the energy correlation and the frequency spectrum of the radio transient will be discussed.Étudiée pour la première fois dans les années 60, la technique de radiodétection des gerbes atmosphériques montra des résultats prometteurs mais limités par les capacités techniques de l'époque. H.R.Allan synthétisa alors l'ensemble des connaissances dans une revue extensive dont les conclusions et les prédictions font encore référence aujourd'hui. L'expérience CODALEMA a été conçue en 2001 à l'observatoire de Nançay, d'abord comme un démonstrateur de la faisabilité de la technique de radiodétection des rayons cosmiques. Modifiée en profondeur en 2005, elle a permis de mettre en place une première corrélation en énergie et de prouver sans ambiguïté la prépondérance du champ magnétique terrestre dans l'émission radio de la gerbe. Le passage à de grandes surfaces de détection est la prochaine étape du développement de la technique. L'autonomie des détecteurs devient alors un élément crucial. Précédée de prototypes de tests installés en 2006 au sein de l'observatoire Pierre Auger, une nouvelle génération de détecteurs a depuis été développée et ses résultats sont détaillés. Cette thèse traite également des différentes problématiques liées à la technique de radiodétection : réponse d'antenne, sensibilité, impact de l'environnement, surveillance d'une expérience à grande échelle. La détermination, indépendamment d'un autre détecteur, des caractéristiques de la gerbe est discutée notamment la distribution latérale, la corrélation en énergie et la composition en fréquence du signal radio
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
- …
