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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
Anomalies magnétiques et tectonique des plaques de la plaque Caraïbe et du golfe du Mexique
No full textThe origin of the Caribbean plate - Pacific or intra-American - is still under debate. We produced a magnetic map from our compilation of marine magnetic data in the Caribbean plate and the Gulf of Mexico (GoM) in order to perform a magnetic interpretation which could contribute to the debate. In the GoM, we relate a set of fan-like long-wavelengthmagnetic anomalies with seafloor spreading. We interpret these anomalies by comparing them to filtered polarity time scales and identify the fossil ridge axis. We then carry out plate tectonic reconstruction to establish the initial tectonic framework and evolution of the GoM. The GoM opened asymmetrically in two stages, starting during the Kimmeridgian and ceasing in the Berriasian. We interpret the strong magnetic anomalies and neighboring smoothed magnetic anomalies extending from South to North in the Colombian Basin as Chrons 33 and 33r and the younger part of the CQZ. Comparing the width of magnetic anomalies 33 and 33r in the Colombia Basin, Atlantic and Pacific Oceans shows a similarity between those in the Colombian Basin and the Pacific Ocean. Forward modelling in the Colombian Basin allowed to propose a paleo-latitude of ∼10°S and a spreading rate of ∼3.6 cm/yr. The crust in the Venezuela Basin shows North-South fracture zones and stronger magnetic variations that would be older, belonging to the middle part of the CQZ. The Caribbean plate more likely formed on the Pacific-Farallón spreading center.El origin de la placa Caribe - Pacífico o intra-América - está todavía dentro de debate. En esta investigación se produjo un mapa magnético a partir de nuestra compilación de datos magnéticos marinos en la placa Caribe y el Golfo de México (GoM) con el objetivo de realizar una interpretación magnética que sirva de contribución al debate. En el Golfo de México, relacionamos al conjunto de anomalías en abanico y de longitud de onda larga con la expansión del piso oceánico. La interpretación de estas anomalías se realizó mediante su comparación con diferentes escalas de tiempo de la polaridad geomagnética filtradas y mediante la posterior identificación de la cresta de la dorsal fósil. A partir de esos resultados, realizamos la reconstrucción de placas tectónicas para establecer el marco tectónico inicial y la evolución del GoM. El piso oceánico del GoM se expandió asimétricamente en dos estadios de rotación, comenzando durante el Kimmeridgiense y cesando en el Berriasiense. Desde el Sur al Norte de la cuenca de Colombia, son observadas una secuencia de anomalías fuertes y otra secuencia de anomalías suaves las cuales son interpretadas como los Cronos 33 y 33r y parte del Cretácico Quieto Temprano. La comparación del ancho de las anomalías magnéticas 33 y 33r en la cuenca de Colombia con anomalías en los océanos Pacífico y Atlántico permitió establecer la similaridad entre las mismas con las anomalías en el Océano Pacífico. El modelado directo en la cuenca de Colombia permitió proponer una paleo-latitud de ∼10°S y una velocidad de expansión de ∼3.6 cm/yr. La corteza en la cuenca de Venezuela presente zonas de fractura en dirección Norte-Sur y variaciones magnéticas fuertes que podrían ser más antiguas, siendo su edad correspondiente al período intermedio del Cretácico Quieto. La placa Caribe podría haberse formado sobre el centro de expansión Pacífico-Farallón.L’origine Pacifique ou intra-Américaine de la plaque Caraïbe est toujours en débat. Nous avons produit une carte magnétique à partir de la compilation des données magnétiques marines de la plaque Caraïbes et du golfe du Mexique (GoM) afin de contribuer au débat. Dans le GoM, nous interprétons un ensemble d’anomalies magnétiques en éventail de grande longueur d’onde comme liées à l’expansion des fonds océaniques. Nous les identifions par comparaison avec de versions filtrées de l’échelle des inversions de polarité magnétique et localisons l’axe d’expansion fossile. Nous effectuons des reconstructions paléogéographiques pour établir le cadre tectonique initial et l’évolution du GoM, ouvert asymétriquement entre le Kimmeridgien et le Berriasien. Nous interprétons les fortes anomalies magnétiques et puis celles, plus lisses, observées du Sud au Nord dans le bassin de Colombie comme les Chrons 33 et 33r et la partie la plus récente de la Période Magnétique Calme du Crétacé (CQZ). Nous comparons la largeur des anomalies magnétiques 33 et 33r du bassin de Colombie et des océans Atlantique et Pacifique pour remarquer une similitude entre bassin de Colombie et océan Pacifique. La modélisation directe dans le bassin de Colombie conduit à une paléolatitude de ∼10°S et un taux d’expansion de ∼3,6 cm/an. Le bassin du Venezuela présente des zones de fracture Nord-Sud et des variations magnétiques de plus forte amplitude qui serait plus anciennes, reflétant la partie médiane du CQZ. La plaque Caraïbe s’est formée au centre d’expansion Pacifique-Farallón, et la province magmatique Caraïbe (CLIP) serait liée au point chaud des Galápagos
« L’une des raisons qui m’a amenée jusqu’ici a été ma passion pour la science et mes convictions »
No full textOriginaire du Venezuela, Andreina Garcia Reyes est spécialisée dans les sciences de la Terre (géophysique), et dans la modélisation des anomalies gravimétriques sur des bassins structuraux et dans la caractérisation magnétique de la croûte terrestre et la reconstruction des plaques tectoniques à partir des anomalies magnétiques. Elle a travaillé au ministère de Sciences, de la technologie et de l’innovation du Venezuela et elle est partie en France pour poursuivre ses études doctorales. Une fois rentrée dans son pays, ses conditions de vie personnelles et professionnelles se sont aggravées de telle sorte qu’elle a dû repartir en France
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
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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