1,720,957 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
Deep neck infections: a study of 365 cases highlighting recommendations for management and treatment.
Get PDFThe aims of this investigation were to review the clinical behavior of deep neck infections (DNIs) treated in our institution in order to identify the predisposing factors of life-threatening complications and propose valuable recommendations for management and treatment. A total of 365 adult patients with DNIs were retrospectively identified. One-hundred and thirty-nine patients (38.1%) underwent surgical drainage. Overall, 226 patients (61.9%) responded effectively to intravenous antimicrobial therapy only. There were 67 patients (18.4%) developing life-threatening complications. Diabetes mellitus (odd ratio 5.43; P < 0.001) and multiple deep neck spaces involvement (odd ratio 4.92; P < 0.001) were the strongest independent predictors of complications. The mortality rate was 0.3%. Airway obstruction and descending mediastinitis are the most troublesome complications of DNIs. In selected patients, a trial of intravenous antibiotic therapy associated with an intensive computed tomography-based wait-and-watch policy may avoid an unnecessary surgical procedure. However, about one-fourth of patients present significant comorbidities, which may negatively affect the course of the infection. In these cases and in patients with large or multiple spaces infections, a more aggressive surgical strategy is mandatory
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
HPV-16 E6 L83V variant in squamous cell carcinomas of the upper aerodigestive tract.
Get PDFPURPOSE: The aim of this prospective case series study was to determine the prevalence of HPV-DNA, analyze the E6 mRNA expression, identify intra-type variation in the E6 oncogene in upper aerodigestive tract (UADT) squamous cell carcinoma (SCC), and correlate the presence of HPV-DNA with several clinical parameters and outcome.
METHODS: Frozen samples of UADT-SCC were analyzed for the presence and characterization of HPV-DNA and RNA sequences by means of polymerase chain reaction (PCR), reverse transcriptase-PCR, and direct sequencing of amplified products.
RESULTS: HPV-DNA sequences were detected in 10% of the tumors, all of which were typed as HPV-16. Positivity for HPV-16 E6/E7 mRNA was observed in five of the eight HPV-positive tumors (62.5%). The HPV-16 E6 L83V variant was present in five cases. Multivariate analysis identified a history of absence of smoking (P = 0.009) as a predictor of HPV-positive tumor. No significant differences in overall and disease free survival curves were observed between patients with HPV-positive tumors and patients with tumors without detectable HPV-DNA.
CONCLUSION: Our findings support the etiological participation of HPV-16 in a subset of UADT-SCCs from patients lacking traditional risk factors. The potential prognostic significance of HPV-16 E6 L83V variant in HPV-16 positive UADT-SCCs should be more extensively investigated
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
Dispelling the Myths Behind First-author Citation Counts
Get PDFWe 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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