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ANNUAL AVERAGE AND SEASONAL VARIATIONS OF RESIDENTIAL RADON CONCENTRATION FOR ALL THE ITALIAN REGIONE
No full textA representative National Survey to evaluate the exposure to natural sources of ionizing radiation in dwellings was conducted in all the 21 Italian Regions from 1989 to 1998, and the complete results are reported in this paper. Radon concentration was measured for two consecutive 6-month periods (generally covering the spring–summer and autumn–winter seasons) in one room, usually the main bedroom, of each surveyed dwelling. Validated radon concentration measurements were obtained for a total of 5631 dwellings, distributed in 232 towns (all the 50 towns with more than 100,000 inhabitants and 182 randomly sampled smaller towns). The national average, weighted by the population of each Region, of the annual radon concentration is View the MathML source, the geometric mean is View the MathML source, and the geometric standard deviation is 2.1. The fraction of dwellings with a radon concentration exceeding the reference levels of 150, 200, 400, and View the MathML source are 7.7%, 4.1%, 0.9%, and 0.2%, respectively. Regional averages ranged from about View the MathML source to about View the MathML source. The uncertainty of regional values can be relevant in the case of small Regions, where few small towns were sampled, however such uncertainties do not affect national values significantly. A log-normal model underestimates the fraction of dwellings with high radon concentration and needs to be adjusted to obtain a better fitting. Two complete 6-month measurements were obtained for 4742 dwellings. The regional values of the geometric mean and of the geometric standard deviation of the winter/summer ratio ranged from 0.81 to 2.58 and from 1.32 to 1.88, respectively. The corresponding national values were 1.23 and 1.71, respectively. These results and their implications are discussed in the paper
Un secolo di urbanistica a Milano
No full textlo sviluppo urbanistico di Milano costituisce uno degli esempi piùinteressanti e paradigmatici del rapporto complesso che si crea tra le forze del regime immobiliare e la trasformazione della città. particolare attenzione è data all'analisi del rapporto tra la trasformazione del territorio e gli strumenti urbanistici e di pianificazione così da individuare una chiave di interpretazione delle realtà urban
Going Beyond Counting First Authors in Author Co-citation Analysis
Get PDFThe 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
Get PDF“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
Get PDFWe 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
Dinamiche insediative e istanze di trasformazione, in C. Giannino, M.L. D'Anna (a cura di), Aree industriali e politiche di piano
No full textIl testo affronta le tematiche connesse alle dinamiche insediative delle attività produttive a Roma, e le istanze che sono emerse nella fase di crescita e di trasformazione della città moderna e contemporanea, strettamente legate allo sviluppo e alla riconversione industriale. Il testo ripercorre, con questa chiave di lettura, le dinamiche insediative che hanno interessato la Capitale nella fase della “prima modernizzazione urbana”, della “espansione urbana”, della “trasformazione urbana” e della “metropolizzazione del territorio”, utilizzando quindi come chiave di lettura le generazioni urbanistiche individuate da G. Campos Venuti (G. Campos Venuti, 1987; F. Oliva, 2010), al fine di esplicitare le problematiche e le potenzialità del sistema insediativo industriale pianificato e spontaneo/abusivo e gli strumenti di pianificazione messi in campo per soddisfare le istanze di espansione e trasformazione urbana
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