1,721,230 research outputs found
Proporzionamento geometrico e tracciati regolatori "ad quadratum" nella trattatistica architettonica di età moderna (Tesi di dottorato, XVIII ciclo)
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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
Undifferentiated connective tissue diseases (UCTD): a new frontier for rheumatology
No full textPatients with signs and symptoms suggestive of a systemic autoimmune disease but not fulfilling the classification criteria for defined diseases are common in clinical practice. Such conditions have been defined as undifferentiated connective tissue diseases (UCTDs). Since the 1980s, many studies have analyzed different aspects of the UCTDs -- their frequency and epidemiological characteristics, the rate of evolution to defined CTD, and their clinical and serological characteristics. It is agreed that UCTDs represent around 60% of diseases with an undifferentiated onset, that they are systemic autoimmune diseases characterized by simplified clinical and serological profiles, and that they have a good prognosis. Although many aspects of these conditions have been studied and clarified, there is still no agreement on how best to identify UCTD patients after the onset of their disease. However, such identification is of paramount importance, and further analysis is necessary to improve the sensitivity and specificity of the proposed classification criteria
A case of undifferentiated connective tissue disease: is it a distinct clinical entity?
No full textBACKGROUND:
In November 2001, a 24-year-old woman with thrombocytopenia and Raynaud's phenomenon presented to our clinic. Her physical examination was unremarkable except for bruising on her legs and arms.
INVESTIGATIONS:
Laboratory assays detected the presence of antinuclear and anti-ribonucleoprotein antibodies. Tests for antibodies to double-stranded DNA and for antiphospholipid (lupus anticoagulant and anticardiolipin), anticentromere, anti-Scl-70, and antiplatelet antibodies were negative, as was a Coombs test. An echocardiogram, chest X-ray, and abdominal scan showed no abnormalities. Nailfold digital capillaroscopy revealed minor capillary changes not specific for scleroderma.
DIAGNOSIS:
Undifferentiated connective tissue disease.
MANAGEMENT:
The patient was successfully treated initially with high doses of corticosteroids and azathioprine, followed by rapid dose tapering. Therapy was continued for 2 years and then stopped. Over the next 4 years the patient's disease history was unremarkable, apart from mild Raynaud's phenomenon of the hands and the presence antinuclear and anti-ribonucleoprotein antibodies. The diagnosis of undifferentiated connective tissue disease was confirmed at her most-recent assessment, in October 2007
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
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