1,720,969 research outputs found
Aspetti immunoistochimici e ultrastrutturali della biopsia cutanea nel diabete insulino-dipendente
No full textEffect of sperm morphology and motile sperm count on outcome of intrauterine insemination in oligozoospermia and/or asthenozoospermia
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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
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
Teratozoospermia. Correlazione tra distribuzione immunoistochimica dell’acrosina e vitalità degli spermatozoi umani.
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Fluorescence microscopic detection of acrosin in different morphologic types of human spermatozoa
No full textThe immunoreaction for acrosin in different morphological types of human
spermatozoa was evaluated by light microscopy in the semen of 68 male partners of
infertile couples. The antigen had a cup-shaped distribution in the anterior
region of the head in normal spermatozoa, and in those with an isolated abnormal
mid-piece or tail. On the contrary acrosin was absent, or it did not show a
cup-shaped immunostaining, in most spermatozoa with malformed heads with the
exception of those with a large oval form. The assessment of immunoreaction for
acrosin and of vitality of different morphological types of spermatozoa in the
same ejaculates, suggested that the antigen was intrinsically absent in
abnormal-headed but vital spermatozoa. It is concluded that an inherent lack, or
an abnormal synthesis of acrosin during spermatogenesis is associated to the
abnormal development of the spermatozoa head
Early increase precedes a depletion of VIP and PGP-9.5 in the skin of insulin-dependent diabetics--correlation between quantitative immunohistochemistry and clinical assessment of peripheral neuropathy
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