1,721,105 research outputs found
Unusual case of benign neoplasm of the breast mimicking a carcinoma: granular cell tumor. Case report
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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
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
Scintimammography with dedicated breast camera in unifocal and multifocal/multicentric primary breast cancer detection: a comparative study with SPECT
No full textThe aim of this study was to assess the usefulness of planar scintimammography (SM) with a high-resolution dedicated breast camera (DBC) compared to SPECT in unifocal and multifocal/multicentric primary breast cancer (BC) detection. DBC planar SM and conventional SPECT were acquired using 99mTc-tetrofosmin as radiotracer in 85 consecutive patients suspect for BC at conventional imaging and clinical examination. Scintigraphic data were related to histology in all cases. BC was proven in 74/85 patients, unifocal in 56/74 cases and multifocal/multicentric in 18/74; 90 carcinomas were ascertained. Benign lesions were found in 12 cases, including one who also had BC in the contralateral breast. DBC planar SM and SPECT were true-positive in 72/74 and in 70/74 BC patients, respectively, and globally detected 96.7% and 92.2% of carcinomas. DBC and SPECT sensitivity were, respectively, 90.3% and 80.6% in <or=10-mm carcinomas and 100% and 98.3% in larger ones; sensitivity values in non-palpable carcinomas were 92.6% and 77.8%, respectively, and 98% for both procedures in palpable ones. DBC planar SM and SPECT correctly assessed multifocality/multicentricity in 91.7% and 83.3% of cases, respectively. Sensitivity differences were not significant. Both procedures showed only a false-positive result. DBC planar SM and SPECT proved highly sensitive and specific in BC detection, representing a useful complementary tool to mammography. However, DBC planar SM showed technical advantages and better clinical performance than SPECT in both subcentrimetric carcinoma detection and multifocal/multicentric disease assessment. Thus, DBC planar SM should be preferred, but SPECT remains a useful alternative when DBC is unavailable
Appropriate 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
The clinical impact of Molecular Breast Imaging (MBI) with high resolution dedicated breast camera (DBC) in the diagnosis of breast cancer (BC): incremental value versus mammography (Mx)
No full textTrattamento chirurgico del carcinoma mammario dopo chemioterapia neo-adiuvante. 103° Congresso della società italiana di chirurgia. Bologna, 28-31 ottobre, 2001. Abstract book.
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