1,720,959 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
Potentially harmful microalgal distribution in an area of the NW Adriatic coastline: sampling procedure and correlations with environmental factors
Full text linkDispelling 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
Monitoraggio spazio-temporale di fitoplancton potenzialmente tossico in un’area della costa marchigiana: correlazione con i parametri chimico-fisici e biologici delle acque
Full text linkIn questo lavoro è stato studiato il trend di popolazioni fitoplanctoniche tossiche o HABs (Harmful Algal Blooms) lungo un’area della costa marchigiana durante un anno di attività di monitoraggio costiero. La composizione e la distribuzione spazio-temporale delle specie fitoplanctoniche HAB sono state correlate con i fattori meteorologici, chimico-fisici ed eutrofici delle acque. Nel periodo compreso tra Novembre 2001 e Novembre 2002 sono state monitorate mensilmente 4 stazioni di campionamento. Il contributo fitoplanctonico delle specie HAB analizzate è stato del 10% rispetto al fitoplancton totale. Tra le specie tossiche appartenenti alla classe dei Dinoflagellati oggetto di studio, quelle presentatesi con più frequenza sono state: Lingulodinium polyedrum (concentrazione massima = 83 cellule/2ml di retinata lungo la colonna d’acqua) e tutte le specie appartenenti al genere Dinophysis (concentrazione massima = 24 cellule/2ml di retinata lungo la colonna d’acqua); mentre nella classe delle Diatomee il genere Pseudonitzschia, che contiene alcune specie potenzialmente tossiche, era presente ad alte densità cellulari (concentrazione massima = 5381 cellule/2ml di retinata lungo la colonna d’acqua). Le correlazioni effettuate tra la distribuzione delle popolazioni HAB ed i parametri eutrofici e chimico-fisici hanno dimostrato che in condizioni di valori elevati di TRIX le specie algali tossiche si presentavano in maggiore abbondanza (p = 0.018 con densità algale > 103 cellule/2ml di retinata lungo la colonna d’acqua). Il fosforo totale è risultato essere il fattore limitante per la crescita del fitoplancton tossico (p = 0.014). Inoltre, esiste un’elevata correlazione tra l’andamento della salinità misurata a metà colonna d’acqua e l’abbondanza delle specie tossiche (p = 0.075). In particolare, i cinque taxa algali tossici oggetto di studio sono risultati essere presenti in maggiore quantità con un abbassamento della salinità. Dato che tale parametro si è presentato più elevato in profondità rispetto alla superficie, risulta che tali microrganismi prediligono ambienti meno salati e quindi tenderebbero a migrare verso gli strati superficiali, disponendosi al di sopra dell’aloclino e nei pressi di foci fluviali
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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