1,720,974 research outputs found
Correlation between the direct IgG MAR test (Mixed Antiglobulin Reaction test) and seminal analysis in men from infertile couples”
No full textThe direct IgG mixed antiglobulin reaction (IgG MAR) test was carried out in 395 male subjects from infertile couples, selected on the basis of their seminal characteristics (sperm concentration greater than 10 X 10(6)/ml, sperm motility greater than 10%); attempts were made to correlate results with the seminologic aspects of the ejaculate. A significant correlation was observed between a positive MAR test and spontaneous sperm autogglutination. No correlation was observed, however, between test positivity and concentration, motility and sperm morphologic features, the macroscopic aspects studied (viscosity, fluidification), or increased concentration of leukocytes
Remodeling of the vascular channels in retinal angiomatous proliferations treated with intravitreal triamcinolone acetonide and photodynamic therapy
No full textAbstract Background: The objective was to describe the remodeling of
the vascular channels in stage II retinal angiomatous proliferation
(RAP) treated by intravitreal injections of triamcinolone acetonide (TA)and subsequent photodynamic therapy(PDT).
Methods: Stage II RAP secondary to age-related macular degeneration was documented by dynamic digital fluorescein and
indocyanine green angiography in 3 consecutive patients (3 eyes). All eyes were treated with intravitreal injection of TA (4 mg, 0.1 ml) followed by PDT 5–10 days later.
Results:Indocyanine green angiography(ICGA) revealed a complete remodeling of the vascular structure of the three RAPs after treatment. The feeding retinal artery, which shunted a major part of the blood flow from the original arteriole toward the intraretinal
neovascular complex before treatment, regained a normal appearance
after treatment. With RAP closure, the blood flow was again
directed through the original retinal arteriole, and the connection to the RAP was no longer visible.
Conclusions: Stage II RAPs are difficult lesions to treat. A real
remodeling of the vascular lesion is achieved with the combined use of
intravitreal TA and PDT. This finding corroborates the need for
randomized clinical trials currently under way to evaluate this combinationtreatment in wet, age-related macular degeneration
Uncertainty and compatibility analysis of acoustic power determination by intensity and pressure measurement techniques
No full text“Sperm antibodies in infertile women: a comparison of 3 methods for handling the cervical mucus for extraction of immunoglobulins”.
No full textee procedures commonly employed in the extraction of soluble proteins from cervical mucus, for the application of the technique for the detection of sperm antibodies also in this biological fluid, were compared in order to establish which provided the highest yield. Studies were therefore carried out on 125 women with primary and secondary sterility characterized by good rheologic qualities of their mid-cycle cervical mucus and in presence of repeatedly poor PCTs, not justified by the seminal characteristics of their partners. The laboratory results and the statistical analysis have shown that as far as concerns IgG, liquefaction with bromelin and solubilization with Baker's buffer provide a better yield than ultracentrifugation; while bromelin alone has the best yield with IgA
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
Dispelling the Myths Behind First-author Citation Counts
Full text linkWe conducted a full-scale evaluative citation analysis study of scholars in the XML research field to explore just how different from each other author rankings resulting from different citation counting methods actually are, and to demonstrate the capability of emerging data and tools on the Web in supporting more realistic citation counting methods. Our results contest some common arguments for the continued
use of first-author citation counts in the evaluation of scholars, such as high correlations between author rankings by first-author citation counts and other citation
counting methods, and high costs of using more realistic citation counting methods that are not well-supported by the ISI databases. It is argued that increasingly available digital full text research papers make it possible for citation analysis studies to go beyond what the ISI databases have directly supported and to employ more
sophisticated methods
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