1,721,200 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
Genomic medicine in inflammatory bowel disease
Full text linkInflammatory bowel disease (IBD) is a term for two conditions (Crohn’s disease [CD] and ulcerative colitis [UC]) that are characterised by chronic inflammation of the gastrointestinal tract. Clinical symptoms of IBD include recurrent episodes of abdominal pain, diarrhoea, and weight loss. The exact cause of IBD remains unknown, but IBD is likely to be the result of a defective immune response to enteric bacteria in a genetically susceptibly individual. The first part of this thesis has focused on causal genes for the onset of IBD, and it has been demonstrated that specific intestinal T-cell subsets express these genes. In turn, it is hypothesised that these specific immune cell subsets are detrimental to disease mechanisms, and therefore potential targets for therapeutic intervention. The course IBD takes over time is unpredictable and heterogeneous, and there is a need for better patient stratification to aid clinical decision making. In the second part of this thesis it has been demonstrated that patients with a high genetic risk of disease susceptibility are also at risk of specific clinical aspects of disease such as disease location or disease behaviour. Adverse reactions and therapeutic failure are common in the management of IBD. In the final part of this thesis, several genetic mutations that predict adverse reactions to therapies used in the management of IBD have been identified. It has been demonstrated that if patients were to be genotyped prior to initiation of treatment, subsequent genotype-based therapies would lead to a decrease in adverse reactions
Upper-Extremity Approach for Secondary Access in TAVI-Ready for Standard Clinical Practice?
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
Secondary prevention after acute and chronic coronary syndromes: are we still not there?
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