1,721,141 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
Author-wise bibliometric analysis based on entropy.
No full textAuthor-wise bibliometric analysis based on entropy.</p
Estimació quantitativa de precipitació amb radar: estudi del producte SRI
No full textMàster Oficial en Meteorologia, curs 2007-2008L'estimació quantitativa de precipitació amb radar és d'importància cabdal en una gran quantitat d'aplicacions hidrometeorològiques. La complexitat de tots els factors que contribueixen per una banda en els propis processos de precipitació i per altra en el comportament del feix d'energia emès pel radar en el seu recorregut a través de l'atmosfera, fan que les estimacions actuals tot sovint difereixin de la precipitació observada en superfície. En aquest treball s'ha analitzat un mètode d'estimació de la precipitació amb radar consistent en l'aplicació d'una correcció d'un perfil vertical de reflectivitat (PVR) teòric amb dades del Servei Meteorològic de Catalunya. El PVR té en compte l'altura del nivell de congelació per fer una correcció en zones afectades pel fenomen conegut com a banda brillant. Les estimacions de precipitació obtingudes amb aquest mètode s'han comparat amb altres mètodes actualment operatius per cinc casos representatius de precipitació estratiforme i convectiva obtenint-se bons resultats. Encara que es tracta d'una valoració preliminar que caldria completar amb més casos, el mètode examinat presenta bones perspectives per usar-se operativament
Implementació i verificació d'un model de radiació solar a Catalunya
No full textMàster Oficial en Meteorologia, Departament d'Astronomia i Meteorologia (DAM), Facultat de Física, Universitat de Barcelona, Any: 2013, Director: Joan Bech RustulletResum (cat):
En aquest treball s'ha implementat un model de radiació solar que permet obtenir un valor teòric per cel serè de la radiació incident en un punt qualsevol de la superfície de la Terra. Posteriorment, s'ha realitzat una verificació d'aquest model mitjançant la comparació dels valors teòrics obtinguts amb les mesures d'un període de 5 anys (2008-2012) de l'estació automàtica de l'Observatori Fabra (Barcelona) gestionada pel Servei Meteorològic de Catalunya. Els resultats obtinguts indiquen que les variacions habituals en les condicions atmosfèriques no modelitzades indueixen errors inferiors al 9% en el càlcul de la radiació teòrica per cel serè.
Abstract (eng):
In this academic paper a solar radiation model has been implemented, which allows us to obtain a theoretical value of solar radiation in clear sky conditions at any point on Earth's surface. After implementation, a verification of the model has been conducted by comparing the obtained values over a period of 5 years (2008-2012) with data from the automatic meteorological station of Observatori Fabra (Barcelona) managed by the Meteorological Service of Catalonia. Obtained results indicate that usual variations in atmospheric conditions not modeled produce errors which are inferior to 9% in the calculation of the theoretical value of solar radiation for clear sky
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