1,721,099 research outputs found
Optical contrast determination of the thickness of SiO2 film on Si substrate partially covered by two-dimensional crystal flakes
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Confined Acoustic Phonons in Colloidal Nanorod Heterostructures Investigated by Nonresonant Raman Spectroscopy and Finite Elements Simulations
No full textLow-Frequency Shear and Layer-Breathing Modes in Raman Scattering of Two-Dimensional Materials
No full textRaman characterization of AB- and ABC-stacked few-layer graphene by interlayer shear modes
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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
The antiemetic prophylaxis of dexamethasone improved the anesthetic efficacy of sevoflurane in spontaneously breathing patients undergoing outpatient anorectal surgery
No full textABSTRACT
Purpose: Dexamethasone provides potent analgesic and antiemetic effects. Sevoflurane are associated with an increased incidence of postoperative nausea and vomiting (PONV) and delayed patient discharge compared to propofol. This study was designed to evaluate whether the prophylatic use of dexamethasone with sevoflurane could minimize the incidence of PONV and facilitate early recovery after outpatient anorectal surgery.
Methods: Forty outpatients undergoing anorectal surgery were randomly assigned to receive either dexamethasone (5 mg IV; n=20) or an equal volume of saline (n=20) before the induction of anesthesia. Anesthesia was induced with sevoflurane 8% and N2O 67% in oxygen (at 6 L/min) followed by placement of laryngeal mask. Anesthesia was maintained with sevoflurane 2-4% end-tidal in combination with N2O 50% in oxygen 3 L/min. All patients were allowed to breathe spontaneously during the operation. The postoperative nausea and vomiting (PONV), VAS pain score and patient satisfaction were recorded.
Results: The incidence of PONV and VAS pain score were significant lower in dexamethasone-treated patients compared with saline-treated ones. The time required for discharge was significantly shorter in dexamethasone-treated patients. Above all, the dexamethasone-treated patients expressed higher satisfaction index. There was no significant difference in recovery time for eye opening, response to commands, orientation, and ambulatory.
Conclusions: The prophylactic administration of dexamethasone reduces the incidence of PONV andVAS pain score, promotes recovery to home readiness, and improves the satisfaction after the anesthesia with spontaneously breathing of sevoflurane through laryngeal mask in outpatients undergoing anorectal surgery
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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