1,721,049 research outputs found
Ascite.
No full textL’ascite, cioè l’accumulo di liquidi nella cavità
peritoneale, rappresenta la complicanza più frequente
della cirrosi, giacché si sviluppa in circa il
60% dei pazienti entro 10 anni dal momento della
diagnosi di cirrosi. L’insorgenza di ascite ha un significato
prognostico negativo: infatti la sopravvivenza
a due anni dei pazienti con ascite è intorno
al 50%. Inoltre la presenza di ascite può favorire
la comparsa di ulteriori complicanze quali
squilibri idroelettrolitici, insufficienza renale,
compresa la sindrome epatorenale e la peritonite
batterica spontanea. In alcuni pazienti, l’ascite si
può associare alla presenza di versamento pleurico,
in genere destro (idrotorace epatico)
Il caso di Imola
No full textIl capitolo descrive l'esempio di attuazione del Piano per la salute nella realtà di Imola e ne sottolinea la ampia partecipazione e l'innovativa struttura democratica utilizzata
Sperimentazione e modellazione di calcestruzzi fibrorinforzati
No full textL’aggiunta di fibre in malte e calcestruzzi sta diventando una tecnologia sempre più diffusa. Per permettere che ciò avvenga nel modo migliore si sono sviluppate negli ultimi anni norme e linee guida mirate alla caratterizzazione meccanica di questi materiali compositi. In ambito nazionale nel 2003 è stata emanata la norma UNI 11039, documento che definisce le caratteristiche ed i requisiti del calcestruzzo rinforzato con fibre di acciaio.
L’inclusione di tali fibre in un materiale tipicamente fragile permette di incrementarne la duttilità aumentando l’assorbimento di energia e controllando allo stesso tempo il fenomeno di propagazione della fessura. Per garantire questi comportamenti le fibre possono intervenire in modo non univoco: il meccanismo desiderato, quello cioè in grado di assorbire una maggiore quantità di energia, è lo sfilamento, detto anche pull out.
I materiali così costituiti risultano quindi dotati di una discreta duttilità e di una buona capacità plastica, presentando quindi un miglior comportamento strutturale.
Tramite questa nota sono state descritte le varie fasi dell’analisi delle caratteristiche di tali compositi cementizi fibrorinforzati. Oltre alle prove descritte dalla UNI 11039, sono state condotte prove sperimentali classiche quali prove di trazione indiretta, di compressione ed indagini ultrasoniche. Queste prove “accessorie”, non esplicitamente previste cioè dalla UNI 11039, sono servite per poter avere dati più precisi sugli SFRC (steel fibers reinforced concrete) e riferimenti esatti per la successiva fase di analisi e elaborazione dei risultati tramite il modello analitico proposto.
Mediante l’analisi e il confronto di calcestruzzi rinforzati con fibre di due diverse lunghezze e in diversi dosaggi si è cercato di comprendere meglio questi materiali e trovare un riscontro pratico ai comportamenti descritti in teorie ormai diffuse e consolidate.
Il modello analitico, validato sui dati sperimentali ottenuti, è stato sviluppato in modo tale da poter ottenere tutte le curve indicate e prescritte dalla UNI 11039 riducendo il numero dei parametri e delle grandezze acquisite
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
Prevention of work related eye injuries: long term assessment of the effectiveness of a multicomponent intervention among metal workers
No full textBackground: Systematic assessments of the effectiveness of interventions to prevent work related eye injuries are needed. Aim: To investigate the long term effectiveness of a multicomponent prevention campaign. Methods: The campaign (conducted in collaboration with the local Employers' Association and Trade Unions) targeted all 237 metal-ware factories in the district of Imola, Italy. Based on preliminary inspections, the main intervention included distribution to all factories of specific educational brochures and broadcasting/publication of television/radio programmes and local newspaper articles containing expert advice on the subject. This was followed by a four year "post-intervention reinforcement" period of unannounced official inspections. Main outcome measures analysed were eye injury rates (versus non-eye injury rates) among metal workers during "pre-intervention" (1988-90), "peri-intervention" (1991-92), "post-intervention reinforcement" (1993-96), "late post-intervention" (1997-2000), and "very late post-intervention" (2001-03) periods with respect to two comparison sectors (construction and wood/ceramics). Results: A Poisson regression in which the eye injury rates were modelled for each sector, period, and interaction, adjusting for non-eye injury rates, was chosen. The periods did not by themselves determine an overall reduction in eye injuries. The period/sector interaction terms were related to significant reductions for the metal sector when crossed with the "post-intervention reinforcement" (IRR = 0.77, 95% Cl 0.61 to 0.97;% decline = 23.4), the "late post-intervention" (IRR = 0.63, 95% Cl 0.50 to 0.79;% decline = 37.4), and the "very late post-intervention" (IRR= 0.58, 95% Cl 0.43 to 0.77;% decline = 42.4) periods, suggesting a sustained reduction in eye injury risk following the main intervention. Conclusion: Results suggest that a carefully coordinated, extensive, multicomponent intervention can lead to lasting reductions in the burden of eye injuries
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