1,721,309 research outputs found
Clinical features and prognosis of primary biliary cirrhosis associated with systemic sclerosis
No full textFrom scleroderma to AL amyloidosis: disease progression or coincidence? Review of the literature
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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
Pigment Epithelium Derived Factor Secreted By Activated Fibroblasts Can Contribute To Impaired Angio and Vasculogenesis In Scleroderma.
No full textClinical risk assessment of organ manifestations in systemic sclerosis – a report from the EULAR Scleroderma Trials and Research (EUSTAR) group data base.
No full textVariations 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
Systemic sclerosis vasculopathy: exploration in transgenic mice
No full textVascular disease in systemic sclerosis (SSc) leads to significant morbidity and mortality. No robust animal model of vasculopathy in SSc has been described. The hypothesis underpinning work described in this thesis is that a primary defect in TGFβ signalling is sufficient to generate the fibrotic, vascular and inflammatory phenotype of this condition. This is explored using a novel transgenic mouse model of SSc (TβRIIΔk-fib). The transgenic mouse strain TβRIIΔk-fib carries a kinase-deficient type II TGFβ receptor which is expressed under the control of a fibroblast specific promoter leading to balanced ligand-dependent upregulation of TGFβ signalling. Consequent increased TGFβ ligand in the peri-fibroblast microenvironment modulates other cell types. The phenotype is one of ubiquitous skin and gut fibrosis and increased susceptibility to severe and persistent fibrosis in response to epithelial lung injury. In this thesis, a cardiovascular phenotype is characterised for the first time, with adventitial fibrosis and medial attenuation within the large elastic arteries of the systemic circulation resulting in systemic hypertension with cardiac fibrosis. Within the pulmonary arterial circulation, there is ubiquitous medial hypertrophy, perivascular inflammation and mild pulmonary hypertension. In both circulations, the phenotype can be exaggerated additional vascular stress: NO synthase inhibition results hypertensive renal stress and VEGFR2 inhibition results in obliterative vascular changes representative of pulmonary arterial hypertension. This thesis demonstrates a unique phenotype that is strikingly relevant to that of human SSc vasculopathy, providing compelling evidence for the role of altered TGFβ signaling in systemic and pulmonary vasculopathy and for the role of altered cell interactions and responses to injury in the development of vascular consequences. A paradigm in which a background TGFβ dependent vasculopathy renders mice susceptible to injury leading to hallmark features of SSc vasculopathy is suggested. This model provides mechanistic insight and a potential platform for preclinical interventional studies in these important complications of SSc
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