1,720,983 research outputs found
Il trattamento riabilitativo nelle gravi cerebrolesioni vascolari in fase acuta: uno stadio preliminare
No full textUtilità di un precoce intervento riabilitativo nei soggetti con disfagia orofaringea in esiti di stroke.
No full textCon questo studio ci siamo proposti di valutare in un campione
di soggetti disfagici in esiti di primo ictus cerebrale per un periodo
di 3 mesi i seguenti aspetti: a) l’incidenza di infezioni polmonari, b)
l’epoca di comparsa dell’infezione rispetto all’evento acuto, c) i
segni clinici maggiormente predittivi di aspirazione e di complicanze
polmonari, d) tempi di recupero dell’autonomia deglutitoria
Pneumonia in stroke patients with oropharyngeal dysphagia: a six-month follow-up study
No full textAbstract
The aim of the study was to estimate the frequency of pneumonia and to determine the risk factors for this complication in poststroke patients with oropharyngeal dysphagia (OD). We prospectively followed up 67 patients (mean age 72.9+/-12.2 years) in the first 6 months after stroke, during which time we recorded gender, stroke side, type of lesion, diabetes, history of chronic obstructive pulmonary disease (COPD), smoking, level of consciousness, functional outcome, dietary history, occurrence of chest infection, and death. Degree of OD and presence/absence of reflex cough was assessed by Fiberoptic Endoscopic Evaluation of Swallowing. Sixty patients showed complete recovery of prestroke swallowing; 9 (13.4% IC 95%=5-20%) developed pneumonia, two of whom died. The first episode of pneumonia occurred in all nine patients within the first month after stroke onset. The pneumonia was associated with absence of reflex cough after swallow, COPD, and severe impairment of consciousness and poor functional outcome
Performance evaluation of a Shottcky SiC power diode in a boost PFC application
No full textThe performance of a 600 V, 4 A silicon carbide (SiC) Schottky diode (Infineon SDP04S60) is experimentally evaluated. A 300 W boost power factor corrector with average current mode control (PFC) is considered as a key application. Measurements of overall efficiency, switch and diode losses and conducted electromagnetic interference (EMI) are performed both with the SiC diode and with two ultra-fast, soft-recovery, silicon power diodes, namely the RURD460 and the recently presented STTH5R06D. The paper compares the results to quantify the impact of the recovery current reduction provided by SiC diode on these key aspects of the converter behavior
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
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