1,720,991 research outputs found
A new treatment of acute hypoxemic respiratory failure: noninvasive pressure support ventilation delivered by helmet: a pilot controlled study
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Noninvasive positive ventilation vs conventional oxygen supplementation in hypoxemic patients undergoing diagnostic bronchoscopy
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Effect on neurotrophil chemiluminescence of middle molecular weight substances present in peritoneal dialysis fluid in patients with acute renal failure
No full textEffect on neurotrophil chemiluminescence of middle molecular weight substances present in peritoneal dialysis fluid in patients with acute renal failur
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
Effect of neurotrophil chemiluminescence of middle molecular weight substances present in peritoneal dialysis fluid of patients with acute renal failure
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A physiologic comparison of proportional assist ventilation with load-adjustable gain factors (PAV+) versus pressure support ventilation (PSV).
No full textPURPOSE: To compare patient-ventilator interaction during PSV and PAV+ in
patients that are difficult to wean.
METHODS: This was a physiologic study involving 11 patients. During three
consecutive trials (PSV first trial--PSV1, followed by PAV+, followed by a second
PSV trial--PSV2, with the same settings as PSV1) we evaluated mechanical and
patient respiratory pattern; inspiratory effort from excursion Pdi (swing(Pdi)),
and pressure-time products of the transdiaphragmatic (PTPdi) pressures.
Inspiratory (delay(trinsp)) and expiratory (delay(trexp)) trigger delays, time of
synchrony (time(syn)), and asynchrony index (AI) were assessed.
RESULTS: Compared to PAV+, during PSV trials, the mechanical inspiratory time
(Ti(flow)) was significantly longer than patient inspiratory time (Ti(pat)) (p <
0.05); Ti(pat) showed a prolongation between PSV1 and PAV+, significant comparing
PAV+ and PSV2 (p < 0.05). PAV+ significantly reduced delay(trexp) (p < 0.001).
The portion of tidal volume (VT) delivered in phase with Ti(pat)
(VT(pat)/VT(mecc)) was significantly higher during PAV+ (p < 0.01). The time of
synchrony was significantly longer during PAV+ than during PSV (p < 0.001).
During PSV 5 patients out of 11 showed an AI greater than 10%, whereas the AI was
nil during PAV+.
CONCLUSION: PAV+ improves patient-ventilator interaction, significantly reducing
the incidence of end-expiratory asynchrony and increasing the time of synchrony
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
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