1,721,008 research outputs found
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
Miller-Fisher syndrome following vaccination against influenza virus A/H1N1 in an AIDS patient
No full textVaccination against the novel epidemic influenza virus A/H1N1 that appeared in 2009 is associated with a number of neurological complications, including transverse myelitis [1]. The guidelines of the Italian Ministry of Health (23 July 2009) suggest that patients with immunodeficiency syndromes, including human immunodeficiency virus (HIV)-positive individuals, also be vaccinated against this virus. Here we report a case of Miller–Fisher syndrome (MFS) in a patient with acquired immune deficiency syndrome (AIDS) following vaccination against seasonal and pandemic influenza
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
Esame con PCR sul vitreo per la diagnosi di retinite da CMV
No full textLa retinite da CMV è la più comune infezione opportunistica nei pazienti affetti da AIDS. In 10 pz con infezione da HIV che presentavano un quadro oftalmoscopico di retinite emorragica è stato effetuato un prelievo, via pars plana, di 100 microlitri di vitreo con ago 25 gauge. Le modalità di prelievo, con alcune attenzioni, semplici, la specificità elevata dell'esame PCR rendono l'esame del vitreo di indubbia utilità
Associazione tra tubercolosi ed infezione da HIV: programma per uno studio multicentrico
No full textAppropriate Similarity Measures for Author Cocitation Analysis
Get PDFWe 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
- …
