1,721,106 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
Serum bile acids in dyslipidaemic patients
No full textThe sensitivity of total serum bile acid concentration as an index of hepatic damage has long been recognised. In addition serum bile acid measurement is significantly more specific than conventional hepatic function tests. However, the concentration might be affected by factors other than hepatic dysfunction. Several authors have reported variations in the synthesis of serum bile acids in dyslipidaemic patients. This might potentially reduce the value of concentration measurement in the diagnosis of hepatic diseases, especially considering the relative prevalence of hyperlipidaemia. The present article reports on radioimmunological serum bile acid measurement before and after meals in 10 patients with dyslipidaemia and in 22 controls. No difference was revealed between the two groups. Therefore dyslipidaemia appears not to affect the specificity of the test nor does it invalidate the use of radioimmunological measurement of total serum bile acids in the study of hepatic function
ACR70-disease activity score remission achievement from switches between all the available biological agents in rheumatoid arthritis: a systematic review of the literature.
No full textSerum lipid pattern and apolipoproteins (A1 and B100) in active rheumatoid arthritis
No full textCardiovascular diseases and atherosclerotic manifestations have been reported to be the most common causes of death in rheumatoid arthritis (RA). In the present investigation the levels of serum lipids, apolipoproteins (A1 and B100), total proteins, and albumin were studied in 35 female patients affected by active RA. Apolipoproteins A1 and B100 were significantly lower in RA patients than in controls. No significant difference was observed in total cholesterol, LDL cholesterol, or triglycerides. In contrast, HDL cholesterol and serum albumin were significantly lower in RA patients compared to controls. The finding of reduced apolipoproteins and HDL-cholesterol levels may represent an important factor in the etiology of cardiovascular and atherosclerotic disease in RA. Reduced levels of albumin in active RA may indicate a reduced rate of proteins like lipoproteins in the liver
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