1,720,967 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
Angiosarcoma and Vascular Surgery A Case Report and Review of the Literature to Focus on a Possible Risk Factor
No full textIntroduction: Angiosarcomas (AS) are rare and aggressive neoplasms originating from the endothelium: they represent less than 2% of all soft tissue sarcomas and usually have a poor prognosis. Although more often primary, different risk factors have been described and some cases are associated with vascular surgery. Materials and Methods: We present the case of an 84-year-old man who developed an AS on his thigh 3 years after a popliteal bypass with autologous saphenous vein. We performed a thorough review of the literature describing the main characteristics of the 25 cases (including ours) of AS associated with vascular surgery reported from 1981 to 2022. Results: Most of the patients were males (21 men vs 4 women) with a range age of 50-84 years. Most of AS are associated with Dacron grafts (12 cases), the overall mean time to onset is 7.8 years after surgery. The most common presenting symptoms are pain (20 cases) and weight loss (10 cases), while cutaneous presentation is uncommon; indeed, violaceous and painful papules, plaques, nodules, and skin ulceration have been found in 3 cases only. Due to unspecific symptoms, differential diagnosis is often difficult and a biopsy for histological confirmation is mandatory. Conclusion: Even if it seems to be a very rare complication, AS should always be considered in patients with compatible symptoms and who have undergone vascular surgery in the past
Uncombable hair syndrome, mental retardation, single palmar crease and arched palate in a patient with neurofibromatosis type I
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
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