1,721,114 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
Surgical treatment of hypertension: Preoperative work-up and surgical treatment of primary aldosteronism in current daily practice
No full textPrimary aldosternism (PA) is the most common cause of secondary hypertension and is due to an inappropriate production of aldosterone by one or both adrenal glands. Approximately 5% of patients with hypertension suffers from PA which equals 1% of the worldwide adult population. PA is characterized by severe hypertension not responding to antihypertensive medications. Through fibrosis of vessels, hearth and kidneys PA leads to diseases such as heart attacks, hearth failure or kidney failure. PA can be treated with a relatively small and safe operation. Current literature however lacks valid data on the precise benefits of this operation in terms of reduction of blood pressure and/or antihypertensive medications. Within this dissertation we focused on complementing this lacuna in literature. The results of our research showed an evident reduction in blood pressure and/or antihypertensive medications in more than 90% of the patients. More than 25% of patients was completely cured from hypertension and therefore were free of antihypertensive medications. Moreover, an additional 31% of patients became normotensive on equal or lower antihypertensive medications. Therefore, this dissertations shows high benefits of surgery in patients with PA
Metabolic consequences of adipose tissue dysfunction
No full textThis thesis focuses on the consequences of adipose tissue dysfunction (ATD), which is defined as the imbalance of pro- and anti-inflammatory adipocytokines produced by adipose tissue. ATD leads to the development of the metabolic syndrome, cardiovascular diseases and diabetes. Although the quantity of adipose is an important factor in the pathogenesis of ATD, the existence of metabolically healthy obese and normal weight metabolically unhealthy individuals proves that quality of adipose tissue is important. Therefore, diagnosis of ATD in both obese and normal weight individuals might lead to better risk stratification and contribute to better prevention of cardiovascular diseases and diabetes. Diagnosing ATD on an individual level is currently best done by determining metabolic syndrome criteria. Other options for diagnosing ATD are explored in this thesis, such as examining free fatty acid composition of adipose tissue in lean and obese individuals, measured with Magnetic Resonance Spectroscopy (MRS). After ensuring adequate reproducibility of this relatively new technique in adipose tissue, it was shown that individuals with metabolic syndrome differ from those without metabolic syndrome regarding their free fatty acid composition in visceral adipose tissue. Moreover, the handling of an oral fat challenge by the visceral adipose tissue is different between individuals with and without the metabolic syndrome. Another option for diagnosing ATD explored in this thesis is measuring adipokine levels. Higher adipokine levels are associated with (components of) the metabolic syndrome and blood pressure. Combining adipokines into an adipokine profile (since the interplay between different adipokines and not single adipokine levels are likely to determine ATD) was also related to the metabolic syndrome. The second part of the thesis covers the treatment of obesity related hypertension. Patients with obesity-related hypertension are best treated with RAAS-blockers, possibly due to the ability of excess adipose tissue to produce angiotensin II and aldosterone. None of the possible three pathophysiological mechanisms (RAAS activation, sympathetic activity and sodium retention behind obesity-related hypertension could be pointed as the most important one. Diagnosing ATD rather than identifying those with overweight or obesity should become the focus of prevention of cardiovascular disease and diabetes. The diagnosis of ATD could trigger more intensified follow-up and early treatment of hypertension and dyslipidemia. For those being overweight or obese with ATD, there is more urgency of weight reduction than in those without ATD, possibly leading to risk reduction
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
The Way to a Man's Stomach Is Through His Heart? The Relation Between Natriuretic Peptide Levels and Adipose Tissue Distribution∗
No full text- …
