1,720,981 research outputs found
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
PERCUTANEOUS US (ULTRA SOUND) GUIDED FINE NEEDLE ASPIRATION (FNA) OF ENDOTHORACIC NEOPLASM
No full textIntroduction: Ultrasound (US)-guided fine needle aspiration (FNA) of percutaneous, transparietal endothoracic lesions, is a useful method in the diagnostic process for anatomopathological characterization. This sampling is a minimally invasive procedure, with a low complication rate and can be performed under loco-regional anesthesia
Material and methods: We retrospectively studied (2009 to 2019) the utility of US guided transthoracic FNA in the diagnosis of suspected endothoracic lesions on 54 patients (34 men and 20 women), aged between 44 and 79 years, with pleural, pulmonary or mediastinal neoplasm viewable with an US examination.
Results: The definitive diagnosis of malignant or benign neoplastic disease was obtained by the pathological examination of the material obtained through the US-guided FNA or by other procedures performed subsequently: biopsies/surgery and clinical information, associated with clinical follow-up. The accuracy of the US guided FNA was 94.4% (51/54) with a sensitivity of 93.8% (93.8) and specificity of 100% (5/5); multiple FNA were performed in 24% of cases (13/54).
Conclusions: US-guided FNA is a procedure that can be performed in one day surgery and allows a significant reduction in healthcare costs and has a particularly high diagnostic accuracy with good patient compliance
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
ULTRASOUND (US) GUIDED DIAGNOSTIC PROCEDURES AND MALIGNANT PLEURAL EFFUSIONS
No full textIntroduction: Malignant pleural effusion (PE) is a rather frequent complication of several intrathoracic and extrathoracic tumors and has an incidence of about 660 patients per million inhabitants per year.
Materials and methods: We retrospectively studied (2000 to 2018) the utility of US guided percutaneous puncture (PP) of PE, in the diagnosis/therapy of 121 patients (67 women and 54 men) with PE and suspected malignant neoplasm, mean age 52 years (39-78 years),
Results: The diagnostic accuracy of the US guided PP fluid examination, (diagnoses of malignant PE), was 91.7% (111/121), with sensitivity of 89.5% (86/96) and specificity of 100%. (25/25). 10 patients did not have confirmation of malignant PE with US guided PP; the malignancy diagnosis was obtained by biopsy with other surgical procedure.
Conclusions: The use of chest US has allowed us to reduce procedure time, hospital stay, with a significant reduction in healthcare costs, and to obtain a particularly high diagnostic accuracy with good patient compliance. We did not observe major complications during US guided PP; minor complications were found in 16.9% (14 cases) with the presence of mild chest pain
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
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