1,721,874 research outputs found
A nonparametric framework for water consumption data cleansing: An application to a smart water network in Naples (Italy)
No full textRemote monitoring and collection of water consumption has gained pivotal importance in the field of demand understanding, modelling and prediction. However, most of the analyses that can be performed on such databases could be jeopardized by inconsistencies due to technological or behavioural issues causing significant amounts of missing or anomalous values. In the present paper, a nonparametric, unsupervised approach is presented to investigate the reliability of a consumption database, applied to the dataset of a district metering area in Naples (Italy) and focused on the detection of suspicious amounts of zero or outlying data. Results showed that the methodology is effective in identifying criticalities both in terms of unreliable time series, namely time series having huge amounts of invalid data, and in terms of unreliable data, namely data values suspiciously different from some suitable central parameters, irrespective of the source causing the anomaly. As such, the proposed approach is suitable for large databases when no prior information is known about the underlying probability distribution of data, and it can also be coupled with other nonparametric, pattern-based methods in order to guarantee that the database to be analysed is homogeneous in terms of water uses
Il Trattamento con PRP e osso autologo delle schisi del processo alveolare in pazienti affetti da labiopalatoschisi
No full textGoing 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
Fattore N. Tutto quello che c'è da sapere sull'energia nucleare
No full textIn un momento storico da molti denominato di “rinascimento nucleare”, caratterizzato da un ritorno di interesse a livello internazionale verso l’energia nucleare, il volume si propone di fare il punto su questa importante fonte energetica, in maniera chiara e concisa ma documentata.
Attorno all’energia nucleare sono stati costruiti molti falsi miti e create paure ingiustificate, che il libro cerca di discutere con spirito critico.
Dopo una breve storia dell’energia nucleare, del disastro di Chernobyl e delle sue conseguenze, il libro presenta lo scenario energetico mondiale e il ruolo che il nucleare potrà rivestire nel futuro, anche in relazione alla riduzione delle emissioni di gas climalteranti; è quindi illustrata la recente svolta italiana in materia di energia nucleare.
La seconda parte del libro, più tecnica, anche se comunque caratterizzata da un linguaggio semplice e divulgativo, spiega i principi fisici che sono alla base della reazione nucleare di fissione, tratta il problema dei combustibili nucleari, descrive il principio di funzionamento dei reattori e presenta le innovazioni tecnologiche più recenti, quali i reattori di ultima generazione e le modalità di smaltimento delle scorie radioattive.
Un vero ambientalista, anche in vista dell’esaurimento dei combustibili fossili, deve considerare tutte le fonti a disposizione per la difesa dello sviluppo, nel rispetto dell’ambiente. In questo senso, il libro auspica un’alleanza tra “ambientalisti” e “nuclearisti”, per esaminare insieme programmi alternativi per la salvezza del pianeta
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