1,720,988 research outputs found
Valutazione della capacità portante residua di sezioni rettangolari in c.a. pressoinflesse sottoposte ad incendio
No full textUn approccio integrato per un miglior controllo della contaminazione in contesti ospedalieri
No full textLa disinfezione degli ambienti ospedalieri è un elemento essenziale nelle strategie di intervento per ridurre il rischio di infezioni correlate all’assistenza. Numerosi studi dimostrano che la pulizia standard non è sufficiente a garantire una corretta disinfezione degli ambienti sanitari e che l’aggiunta di tecnologie no-touch, come i raggi ultravioletti, può restituire un’igiene più approfondita. Lo studio si propone di verificare quanto l’applicazione di raggi ultravioletti, dopo la sanificazione standard, contribuisca ad un aumento del livello di igiene. Nel periodo tra dicembre 2019 ed agosto 2020 è stato condotto uno studio trasversale analitico in stanze di degenza riabilitativa in una clinica privata convenzionata “Rugani Hospital” sita a Monteriggioni (SI). Lo studio è stato condotto secondo il seguente protocollo: i) quantizzazione della contaminazione di 12 punti target scelti nella stanza; ii) attribuzione ai punti di una probabilità di rischio contaminazione; iii) campionamento di un sotto-insieme di 6 punti con assegnamento probabilistico; iv) valutazione dell’igiene
ambientale pre-post disinfezione tramite un sistema UV-C. Per l’analisi statistica pre-post è stato usato il test non parametrico di Wilcoxon; per verificare il ruolo di diversi confondenti è stata usata l’analisi multivariata MANOVA con eventuale test post hoc di
Bonferroni. La stima probabilistica dei punti più contaminati ha permesso di ridurre al minimo il numero di punti campionati, per verificare che l’applicazione del device a raggi UVC riducesse la contaminazione in maniera statisticamente significativa (p < 0,01) nel
confronto tra pre- e post-esposizione con un tempo di irraggiamento minore rispetto a quello indicato dal produttore del device.Disinfection of hospital environments is a cornerstone of intervention strategies to reduce the risk of hospital-associated infections. Many studies show that standard cleaning procedures are not sufficient for proper disinfection of hospital environments and that the addition of no-touch technologies, such us ultraviolet light, can provide deeper sanitisation. This study aims to test whether the application of ultraviolet light after standard procedures improves hygiene levels in the shortest possible time and shows the degree of contamination before and after irradiation. A cross-sectional study was conducted in a real clinical setting in rehabilitation rooms of a contracted clinic “Rugani Hospital” in Monteriggioni (SI), Italy, between December 2019 and August 2020.the study was carried out according to the following protocol: i) quantization of contamination of 12 selected target points in room; ii) attribution to the points of a probability of contamination risk; iii) sampling of a subset of 6 points with probabilistic assignment; iv) evaluation of the pre-post disinfection environmental hygiene using a UV-C system. For the pre-post statistical analysis the non-parametric Wilcoxon test was used; the multivariate MANOVA was used to verify the role of different confounders, with post hoc Bonferroni test.
Probabilistic calculations minimised the samplings required to conclude that the application of the ultraviolet light device reduced the level of contamination in a statistically significant manner (p < 0.01) when comparing pre- and post-exposure, with less irradiation time than indicated by the manufacturer
Improvement and standardization of disinfection in hospital theatre with ultraviolet-C technology
No full textBackground: The level of disinfection between operating sessions is important to prevent cross-contamination risk in operating theatres. Aim: To assess the difference in microbial contamination between different disinfection levels, before (T0) and after (T1) application of a UVC device (UVC-D). Methods: A cross-sectional study was conducted between December 2019 and August 2020 in a clinic. Three disinfection levels - no disinfection after surgery, after in-between cleaning, and after terminal cleaning - were compared to assess the reduction of microbial presence at T0 and T1 according to the use of UVC-D for 3-5 min per bedside. A total of 260 Petri dishes, divided into a preliminary phase followed by a probabilistic model-driven experiment, were used in three operating theatres, and colony-forming units (cfu) were counted. The Mann-Whitney test was performed in the preliminary phase to establish UVC exposure time. Using the probabilistic model, descriptive statistics and percentage and log10 reduction were calculated. The multivariate analysis of variance (MANOVA) for repeated measures was performed to verify the 95% statistical difference between T0 and T1, combined with the disinfection levels and different operating theatres. Findings: The Mann-Whitney test showed no cfu difference between 3 and 5 min of UVC exposure time; the MANOVA test showed no significant difference between disinfection levels in T0 - T1 cfu reduction with a mean cfu reduction of 72% (95% confidence interval: 61.7-84.9) regardless of the disinfection level applied previously. Conclusion: UVC-D has improved environmental disinfection in all initial conditions. Together with the classic sanitizing procedures already present, it improves and standardizes the level of environmental hygiene. (c) 2022 The Healthcare Infection Society. Published by Elsevier Ltd. All rights reserved
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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