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Going Beyond Counting First Authors in Author Co-citation Analysis
Get PDFThe 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
Familial Aorto-Cervicocephalic Arterial Dissections and Congenitally Bicuspid Aortic Valve
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Background
A primary arteriopathy is often implicated in the etiology of spontaneous cervicocephalic arterial dissections, but its exact nature usually remains unknown. We describe the familial occurrence of spontaneous arterial dissections and congenitally bicuspid aortic valve (BAV) and propose a common developmental defect in these families.
Summary of Report
In the first family, a 63-year-old man suffered an extracranial internal carotid artery (ICA) dissection, and his 43-year-old cousin with BAV suffered an intracranial vertebral artery (VA) dissection. Two other family members had pathologically proven BAV. In the second family, a 31-year-old woman suffered bilateral extracranial ICA and VA dissections. Her father, at age 46, suffered an aortic dissection associated with cystic medial necrosis and BAV. Her paternal uncle died from an aortic dissection at age 59. In the third family, a 39-year-old woman suffered extracranial ICA and VA dissections, and her brother died at age 48 from an aortic dissection associated with a BAV.
Conclusions
The familial occurrence of spontaneous arterial dissections and BAV suggests a common developmental defect. The aortic valvular cusps and the arterial media of the aortic arch and its branches are derived from neural crest cells, suggesting that a neural crest defect may be the underlying abnormality in these families.
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Variations on the Author
Get PDF“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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