1,720,972 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
ATP1A3 mutant patient with alternating hemiplegia of childhood and brain spectroscopic abnormalities.
No full textAlternating hemiplegia of childhood (AHC) is a rare and severe disorder characterized by episodes of hemiplegia and dystonia alternating in laterality, possibly associated with seizures, abnormal ocular movements, headache and hypotonia. AHC is caused by dominant mutations in the ATP1A3 gene [4, encoding a neuron specific Na+-K+-ATPase pump, which has a crucial role in excitability of neurons and muscles.We present an unreported AHC patient with ATP1A3 gene mutation, who received an unusually long clinical follow-up (44 years) and underwent brain 1H magnetic resonance spectroscopy (MRS) to understand the etiology of neurological deterioration with age
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
Neuromuscular transmission abnormalities in myotonic dystrophy type 1: A neurophysiological study
No full textObjectives: Weakness and fatigue are frequent symptoms in myotonic dystrophy type 1 (DM1), mainly as a result of muscle impairment. However, neuromuscular junction (NMJ) abnormalities could play an additional role in determining these manifestations. We aimed to document the possible NMJ involvement in DM1.Patients and methods: In order to substantiate this hypothesis we performed low rate repetitive nerve stimulation (RNS) and single fiber electromyography (SFEMG), in 14 DM1 subjects.Results: RNS resulted abnormal in four patients while SFEMG revealed a pathological jitter in ten. A significative correlation was found between jitter values and decrementing response (p < 0.000311; r= 0.822).Conclusion: These results suggest a possible involvement of NMJ in DM1. (C) 2016 Elsevier B.V. All rights reserved
Miopatia e Miastenia Gravis associate a Lupus Eritematoso Sistemico. Atti 96° Congresso Nazionale della Società Italiana di Medicina Interna, 112, 1995, Roma.
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Mapping of the Emery-Dreifuss gene through reconstruction of crossover points in two Italian pedigrees
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