1,721,254 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
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
Maschera laringea vs tubo tracheale in ventilazione meccanica in anestesia pediatrica [Laryngeal mask vs tracheal intubation during mechanical ventilation in pediatric anesthesia]
No full textAIM: The aim of this study was to evaluate and compare the parameters for mechanical respiration in pediatric patients undergoing controlled ventilation with a laryngeal mask (LM) and an uncuffed orotracheal tube. METHODS: The study examined 100 ASA 1 patients undergoing general anesthesia with myoresolution and mechanical ventilation using a Servo Ventilator 900 (constant flow, 25% insufflation, 10% teleinspiratory pause, tidal volume 10 ml/kg). All patients were divided into 2 groups matched for age and weight. An uncuffed orotracheal tube was used in one group (Group T) and a laryngeal mask (LM) in the other (Group M). The following parameters were measured: peak and pause pressure in the respiratory passage (Paw), total inspiratory resistance (R tot), compliance (C) and air loss expressed as a fraction of inspired volume (Vi-Ve/Vi). The statistical analysis of results was performed using Student's "t"-test and the level of significance was p < 0.05. RESULTS: Peak pressures were comparable in the two groups and were lower than the pressure needed to open the lower esophageal sphincter. These values could be further reduced by the extension of insufflation time achieved by abolishing the teleinspiratory pause included in the study to measure air resistances and compliance. Air losses were also similar in both groups, being respectively 13 and 11%. This means that environmental pollution using LM was not greater than with the uncuffed tube and confirms that, even with the latter, the protection of the airways cannot be regarded as absolute. Total inspiratory resistances were respectively 16.1 cm H2O/l/sec in group T and 15.1 cm H2O/l/sec in group M. This occurred in spite of the fact that the latter showed an in vitro capacity to oppose lower resistances compared to the corresponding tubes given that it was shorter with a larger diameter. Studies using the mechanical model did not include the laryngeal mask--larynx connection which may cause increased resistance owing to the variable position of the epiglottis, although this cannot be identified clinically. CONCLUSIONS: The laryngeal mask allows mechanical ventilation with low pressure in the respiratory passage and reduced air losses compared to the uncuffed tracheal tube. The risk of gastroesophageal insufflation is therefore minimal and artificial ventilation is reliable, if correctly performed. Lower levels of inspiratory resistance might be an advantage in spontaneous breathing owing to the consequent reduction of respiratory effort, but they do not appear to be significantly lower than with the tracheal tube
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