1,721,056 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
Non-invasive haemodynamic effects of two nasal positive pressure ventilation modalities in stable chronic obstructive lung disease patients.
No full textThe aim of this study was to compare the haemodynamic effects of a 45-min session of two modalities of non-invasive positive pressure ventilation (nPPV), by means of cardiac echo-Doppler and right heart catheterization, in chronic obstructive lung disease (COPD) patients with chronic respiratory insufficiency. Fourteen patients with stable COPD (11 males, mean age 62.9 +/- 9.8 years) underwent right heart catheterization using a floating Grandjean catheter and simultaneous echo-Doppler measurements before and during two randomly applied 45-min ventilatory sessions, consisting of nasal intermittent positive pressure ventilation in assist/control mode (nIPPV) and nasal pressure support ventilation (nPSV). Blood gases improved significantly during both modalities of ventilation. A significant increase during ventilatory sessions was found in invasive pulmonary right atrial pressure and cardiac output. A statistically significant decrease was found in the flow velocity peak of the superior vena cava and hepatic vein, and in systodiastolic flow velocity integral of the superior vena cava and hepatic vein. The inferior vena cava collapsibility index also decreased significantly during both ventilations. Right atrium diameter and area significantly decreased while right ventricular diameter significantly increased. The echo-Doppler cardiac output decreased significantly while systolic pulmonary artery pressure increased. A short session of both nIPPV and nPSV even without PEEP can induce significant haemodynamic changes in patients with stable COPD. Two-dimensional Doppler echocardiography is a non-invasive device with sufficient reliability to monitor the haemodynamic effects of nPPV. Further studies are needed to assess the effects of nPPV on vascular peripheral flows
Smart textile. Materiali tradizionali e tecnologie digitali
No full textIl saggio esplora il background teorico e il processo iterativo di progettazione che ha portato allo sviluppo di un'interfaccia da incorporare all’interno di materiali tessili, rendendo lo stesso tessuto una superficie interattiva.
In un segmento di mercato in cui gli assistenti vocali rappresentano l’attuale standard, si è progettata un’interfaccia integrata nello smart textile che combina e-textile (trigger) e processori (calcolo) per innescare interazioni, discrete, immediate e coinvolgenti
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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