1,720,955 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
Régime Alimentaire Des Poussins De L’aigrette Garzette (egretta Garzetta) Dans La Lagune De Boughrara (sud-est Tunisien) : Sélection Des Proies Et Effet De L’âge Des Poussins
No full textCe travail avait pour but d\u27étudier le régime alimentaire des poussins de l\u27Aigrette garzette (Egretta garzetta) dans une colonie de nidification au niveau de la lagune de Boughrara, dans le sud-est de la Tunisie. A l\u27aide de la méthode d\u27analyse des régurgitats, nous avons décrit la diversité des proies consommées par les poussins. Nous avons également échantillonné les proies disponibles dans les zones de chasse des aigrettes adultes, ce qui nous a permis de comparer la composition du régime alimentaire des poussins avec la gamme des proies disponibles dans le milieu. Nos résultats montrent que les poussins sont exclusivement nourris de petits poissons, principalement des jeunes marbrés et loups. Ces deux proies sont plus abondamment consommées que ce qui est prédit par leur disponibilité, ce qui suggère qu\u27elles sont des proies préférentielles. Cependant, des analyses plus approfondies suggèrent que ce processus de sélection alimentaire est lié à la taille des proies. En effet, nous avons constaté qu\u27un poisson devrait avoir un poids inférieur à 14,74 g pour être une proie potentielle pour les poussins. Les jeunes marbrés et loups sont les poissons les plus consommés simplement parce que leur taille est inférieure à ce seuil, ce qui fait d\u27eux des proies bien adaptées à la taille des poussins. Ceci est également soutenu par les relations positives trouvées entre le poids des proies consommées et l\u27âge des poussins. Au fur et à mesure que les poussins grandissent, leurs parents les nourrissent avec des proies plus grosses. Des observations directes sur le comportement de chasse des aigrettes adultes seraient nécessaires pour aborder d\u27une façon lus approfondie la question de la sélection des proies destinées aux poussins
Sibling competition in the broods of Little Egrets Egretta garzetta in a southern Tunisian breeding colony
No full textAsynchronous hatching is a common hatching pattern in the Little Egret Egretta garzetta, however, its role in maintaining dominance relationships and feeding hierarchy among siblings remains poorly studied. In this study, we investigated this issue using data on feeding and aggressive behaviours of Little Egrets nestlings in a southern Tunisian breeding colony. We found that senior nestlings were the first to access the food brought by their parents, and they ingested more food than their younger siblings did. Intermediate nestlings engaged the most frequently in aggression. The youngest nestlings showed a more resigned and less aggressive behaviour, therefore receiving a little less food, but much fewer pecks and injuries than their elders do. These findings stress the importance of hatching order in establishing a feeding hierarchy among Little Egret siblings. Moreover, they suggest that access to food may not be the unique factor that shapes nestlings’ feeding behaviour and competitiveness, as the avoidance of injuries caused by siblings’ attacks may be important. Finally, adult birds appeared to adopt a ‘laissez faire’ strategy, showing no feeding favouritism to counteract or reinforce the effects of hatching asynchrony on their offspring.
French title: Compétition au sein des fratries d’Aigrettes garzettes Egretta garzetta dans une colonie de nidification au sud de la Tunisie
Bien que l’éclosion asynchrone soit de règle chez l’Aigrette garzette Egretta garzetta, son rôle dans le maintien des relations de dominance entre frères et sœurs reste mal connu. Dans ce travail, nous avons abordé cette question en utilisant des données sur des nichées d’aigrettes garzettes dans une colonie de reproduction au sud de la Tunisie. Nous avons constaté que les poussins aînés étaient les premiers à accéder à la nourriture apportée par les parents, ingérant plus d’aliments que leurs frères et sœurs. Les poussins intermédiaires se livraient plus fréquemment à des interactions agressives, alors que les plus jeunes poussins montraient un comportement plus résigné recevant un peu moins de nourriture mais beaucoup moins de coups. Globalement, ces résultats soulignent l’importance du rang d’éclosion dans l’établissement d’une hiérarchie intra-nichée. Ils suggèrent également que l’accès à la nourriture ne serait pas le facteur unique qui intervient dans le façonnement du comportement alimentaire des poussins, dans la mesure où l’évitement des blessures causées par les combats semble compter aussi. Nous soulignons par ailleurs que les parents des nichées étudiées semblaient adopter une stratégie de «laisser-faire», ne montrant aucun favoritisme alimentaire pour contrer ou renforcer les effets de l’éclosion asynchrone sur leur progéniture.
Keywords: aggressive competition, food sharing, hatching order, nestling
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
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