1,720,985 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
Influence of a family history of type II diabetes on fasting leptin and adiponectin plasma levels
No full textFamily history of type II diabetes appears to increase the risk of type II diabetes and of coronary heart disease. The aim of this study was to evaluate the effect of a first-degree family history of type II diabetes on fasting plasma concentrations of leptin and
adiponectin in an outpatient clinical setting.
Methods and results The study included 46 nondiabetic premenopausal overweight and obese women, aged 22–50
years. A total of 22 subjects had no family history of type II diabetes until the third generation (FH−) and 24 subjects had a family history of type II diabetes (FH+), defined as having one or both parents with type II diabetes. Fasting plasma leptin and adiponectin were measured by radioimmunoassay.
Leptin concentrations were significantly higher (p < 0.05) in FH+ than in FH− subjects. Moreover, after multiple regression analyses, both leptin (positively, p < 0.01) and adiponectin (negatively, p < 0.05) maintained a significant
association with family history of diabetes, independently of age, body mass index, insulin resistance (estimated by
homeostasis model assessment, HOMAIR), glucose, lipids,
and blood pressure levels.
Conclusions This study indicated that a genetic predisposition
to type II diabetes is associated with higher leptin
concentrations and lower adiponectin levels independently of insulin resistance, blood pressure and metabolic
parameters, which thus possibly contribute to the higher risk of type II diabetes and cardiovascular disease in subjects with a family history of type II diabetes
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
Current Views About the Link between SARS-CoV-2 and the Liver: Friends or Foe?
No full textThe emergence of the novel coronavirus and the pandemic resulting from its spread have led to significant negative impacts on health, economy, relationships, and others. Particularly in the field of hospital care, the need for a greater number of patients has led to a breakdown of the system. Gastrointestinal manifestations are common in SARS-COV 2 patients, while 10% of those who are sick exhibit symptoms only from gastrointestinal without any manifestation on the part of the respiratory tract. The main manifestations are nausea, vomiting, diarrhoea, and anorexia. It is also interesting to note that biochemical liver disorder is a frequent finding and is associated with a worse prognosis and higher probability admission to intensive care. It was also observed that RNA from the virus was found in the stool several days after the tests came back negative pulmonary secretions, while rectal swab virus detection methods were used with a lower but comparable sensitivity to that of nasal swabs. Gastrointestinal symptoms in SARS-COV 2 infection are common and their search should be part of the initial diagnosis approach and have a connection with the gut microbiota dysbiosis and this can lead to an alteration of the gut/liver axis
Intestinal microbiota: the explosive mixture for inflammatory bowel disease pathogenesis?
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