1,721,097 research outputs found
E-selectin expression and BRAF status in papillary thyroid carcinomas: Correlation with clinicopathologic features
No full textMinimally invasive video-assisted thyroidectomy: an analysis of results and a revision of indications
No full textBACKGROUND: The first report of minimally invasive video-assisted thyroidectomy (MIVAT) was published in 1999, and the indications were progressively implemented: from cytologically undetermined thyroid nodules to intermediate-risk differentiated thyroid cancers. The aim of this study was to review the entire series of patients who underwent a MIVAT, critically analyzing its indications and contraindications and trying to figure out how the indications might be extended.
METHODS: From 1998 to 2009, a total of 1,946 patients (1,659 females, 287 males; mean age = 40.2 years) underwent MIVAT in our department. Inclusion criteria were benign thyroid nodules <35 mm, malignant nodules <20 mm, and an ultrasonographically estimated thyroid volume (ETV) <25 cc. The presence of suspicious or metastatic lymph nodes and the presence of severe thyroiditis were considered a contraindication for MIVAT.
RESULTS: A total thyroidectomy was performed in 1,435 patients (72.3%). A total lobectomy was performed in 511 cases (26.3%), and a central neck node sampling was associated with total thyroidectomy in 104 cases. Final histology revealed benign disease in 979 cases (51.5%) and a malignancy was diagnosed in 915 cases (48.5%). Unexpected thyroiditis was found on final histology in 17.9% of the patients with benign disease and 30.9% of patients with malignancy. The incidence of thyroiditis was significantly different in these two populations (p < 0.0001).
CONCLUSION: Our data confirm the validity of the traditional indications for MIVAT: low-risk differentiated thyroid cancer (DTC), cytologically undetermined nodules, and small-volume benign thyroid disease. The indications may be further and safely extended to those patients with associated thyroiditis and those with intermediate-risk DTC. MIVAT can be proposed on a much larger scale than it was at its onset and cannot be considered an option for only a limited number of patients
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
koamabayili/VECTRON-author-checklist: VECTRON author checklist
No full textWe have done our best to complete the author checklist relating to the use of animals in the hut study. Note that the objective for the hut study was to evaluate the IRS treatment applications for residual efficacy against Anopheles mosquitoes, including the local An. coluzzii mosquito population. Cows were only used to attract mosquitoes into the huts and no tests were carried out directly on the cows. The author checklist is intended for use with studies where experiments are carried out on animals, which is why we have had such difficulty in completing this for the hut study, as many of the questions do not relate to how the cows were used
Author-wise bibliometric analysis based on entropy.
No full textAuthor-wise bibliometric analysis based on entropy.</p
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