1,721,143 research outputs found
L'illumunazione di emergenza negli edifici pregevoli per arte e/o storie: problematiche aperte ad esempi di soluzioni
No full text
Leakage in root canal system during and after treatment: A review
No full textDuring and after a canal treatment any ingress of germs in the pulp space should be avoid because they are responsible for pulpal and periradicular diseases. Often this treatment is performed in more than one visit and amongst those visits a temporary restoration should impede the re-infection. Initially a pre-treatment (build-up) is required in order to prevent fluid leakage and allow a better isolation by rubber dam and a stabilised clamp. Several restorative materials are on the market and a correct choice is crucial to avoid failure considering several factors such as canal dressing medication, number of day between visits, extension of restoration, occlusal load, presence of parafunctions etc. In filled root canals bacteria are able to colonize even small gaps between the canal walls and the gutta-percha. When the root canal treatment is concluded by the final restoration the risk of leakage is not eliminated in fact a new caries, a loss of adhesion, a crown or root fracture might occur. Even dough the final post endodontic restoration is the last step performed to prevent a coronal leakage this unwanted phenomena unfortunately can append any time and from the initial steps during a root canal treatment. Just a standardized follow up can discover those dangerous conditions which may lead to a silent periradicular disease
La percezione della qualità dei prodotti agro-alimentari attraverso i marchi presenti in etichetta: un'analisi sui consumatori
No full textThe article provides some empirical evidence on consumers'ability to interpret the information on the markets in relation to specific attributes of agricultural and food products certified by European quality labels as organic farming, protected designation of origin, protected geographical indication, traditional specialty guaranteed. On the basis of results from studies carried out on consumers, we put forward the hypothesis that consumers have considerable difficulty in finding the link between information received and the specific attribute information refers to and in evaluating the degree of reliability of information itself. These difficulties are linked to a series of factors about which this article proposes some reflections
Irrigants in endodontics: A review
No full textAim. The purpose of this paper was to review different endodontic irrigants use in endodontics. Background. Many areas inside the canals are inaccessible to mechanical instrumentation, the presence of lateral and accessory canals makes root canal preparation even more difficult. The complete smear layer removal from the root canals depends consequently on both the irrigant solutions and the instrumentation phase. Review consults. Irrigants play a very important role in disinfecting the root canals thus the use of specific solutions has been performed in conjunction with mechanical instrumentation for many years. Combination of several irrigants can increase the capability to penetrate inside the tubules improving the final effect against resistant germs like Enterococcus faecalis that plays an important role in the failure of root canal treatment. Conclusion. The ideal irrigant solution should be microbiocidal, dissolve organic tissues and provide a mechanical flushing action without damaging the periradicular tissues in case of extrusion into the periodontium. Clinical significance. Future research on irrigants needs to focus on finding a single unique solutions that should have all those properties
Attitude and awareness of EU quality labels: an analysis of Italian consumers
No full textLo studio analizza l'interesse per le "cues" che rivelano informazioni sugli attributi del prodotto, con lo scopo di identificare quelle che sono maggiormente ricercate per le informazioni su specifiche caratteristiche di qualità e tali da influenzare rispettivamente le decisioni di acquisto e le abitudini alimentari. Un aprticolare attenzione è stata riservata a due differenti fonti di informazione: la marca e la certificazione di qualità nell'Unione Europea (marchi DOP, IGP, Agricoltura Biologica), al fine di determinare il tipo di informazione ricavata dal consumatore. L'indagine è stata condotta in due delle principali città italiane (Milano e Napoli) ed ha interessato un campione di 200 consumatori responsabili di acquisto. I dati sono stati elaborati in due fasi. La prima, è un'analisi descrittiva basata sulla costruzione delle tavole di contingenza. Nella seconda fase si è proceduto alla individuazione, mediante analisi fattoriale e cluster, di differenti gruppi di consumatori sulla base della loro conoscenza relativa alla informazione trasmessa dai marchi di qualità europea
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
- …
