1,721,074 research outputs found
Modelli di simulazione del rumore negli ambienti di lavoro: primo round robin test italiano (relazione ad invito)
No full textIn genere la realizzazione di nuovi luoghi di lavoro a carattere industriale o di loro importanti ristrutturazioni avviene senza aver svolto alcuna previsione in merito al rumore che sarà presente una volta avviata la produzione. E ciò anche quando l’attività che si realizza, si trasferisce o si amplia è notoriamente rumorosa. Questa situazione è in conflitto da un lato con l’esigenza, prevista dalla legge, di valutare il problema in fase progettuale per realizzare ambienti che generino la minima rumorosità possibile e dall’altra con l’esigenza di risparmio economico, oggettivamente possibile intervenendo sul rischio rumore in fase progettuale piuttosto che con bonifiche successive.
Per effettuare la previsione del rumore negli ambienti industriali sono oggi disponibili sul mercato software realizzati a partire da modelli matematici simili, ma non eguali, sulla cui affidabilità esistono pochissimi studi, perlopiù realizzati all’estero. Si è quindi pensato di organizzare un Round Robin Test per effettuare una prima verifica concreta dell’affidabilità dei programmi di previsione del rumore attualmente in commercio nel nostro Paese. Lo scopo del test era di ottenere indicazioni quantitative sull’affidabilità delle simulazioni come comunemente eseguite, confrontando diversi programmi ed operatori su di uno stesso caso reale.
Più in generale, la ricerca tende a promuovere metodiche di progettazione degli stabilimenti industriali che sin dalle prime fasi siano acusticamente orientate per la realizzazione di ambienti di lavoro a minor rischio rumore ai costi più bassi possibili, come del resto raccomandato dalla UNI EN ISO 11690-3
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
Recenti acquisizioni sui meccanismi di sintesi di PCDD/PCDF da incenerimento di rifiuti solidi urbani
No full textVariations 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
- …
