1,721,007 research outputs found
Aggregati artificiali dal riciclaggio di imballaggi PET
No full textIn questo contributo si espongono le caratteristiche fisiche, le prestazioni meccaniche e il processo produttivo di aggregati leggeri di polietilentereftalto denominati alPET, ricavati principalmente dal riciclaggio di imballaggi per bevande. Attraverso l'analisi delle loro proprietà, si evidenzia la possibilità d'impiegare questi aggregati per la produzione di conglomerati bituminosi e cementizi destinati a componenti strutturali portanti dei viadotti stradali
Irrigation monitoring from satellite at hyper-high resolution: Paving the way for remote-sensing-based agricultural water management support services
No full textRecent advances in satellite retrievals of key hydrological variables have fostered the development of approaches for tracking the irrigation footprint on water resources. Nevertheless, constraints due to the native spatial and temporal resolutions of remotely sensed data still limit the building of supporting systems for agricultural water management relying on Earth Observation. This work aims at filling this gap by applying well-established irrigation mapping and quantification techniques with multiresolution satellite data as input to reproduce irrigation dynamics at the unprecedented spatial sampling of 10 m. Results are validated across different scales of interest for water allocation managers, i.e., from the consortium to the single farm level. The irrigation quantification experiment, carried out through the SM-based (Soil-Moisture-based) inversion approach, provides satisfactory results especially in light of the scarcity of ancillary information for refining the estimates. Percentage errors aggregated at the consortium and the farm scales equal to −24 % and to −14 %, respectively, are found. Such results are achieved without considering losses due to irrigation efficiency, as this information is not explicitly available. The irrigation mapping experiment, carried out by leveraging the TSIMAP (Temporal Stability derived Irrigation MAPping) method, is validated at the farm scale only. An overall accuracy of 93 % is reached, corresponding to two agricultural fields misreproduced as non-irrigated out of the total number equal to twenty-eight. The outcomes of this study show the potential of hyper-high resolution implementations of the considered irrigation mapping and quantification techniques for supporting agricultural water managers, highlighting improvements needed to further meet potential users’ requirements
Tecnologie e materiali innovativi per il restauro strutturale di edifici in c.a. di interesse storico – il teatro Finocchiaro a Palermo
No full textLa premessa fondamentale per la redazione di un progetto di restauro è la conoscenza del fabbricato, oggetto di intervento, delle sue evoluzioni nel tempo, dei materiali e delle tecnologie impiegate durante la sua realizzazione. Soltanto l’approfondimento di questa fase preliminare salvaguarda il progettista dal commettere errori e valutazioni sbagliate circa i materiali e le tecnologie da impiegare nel rapporto di compatibilità con l’esistente che si va a modificare, spesso integrare, comunque alterare. Per il teatro Finocchiaro a Palermo si è resa necessaria un’attenta e minuziosa indagine preliminare, culminata nel rilievo geometrico della fabbrica, con particolare attenzione alla valutazione della struttura portante mista in muratura e calcestruzzo armato
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
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
koamabayili/VECTRON-author-checklist: VECTRON author checklist
No full textWe have done our best to complete the author checklist relating to the use of animals in the hut study. Note that the objective for the hut study was to evaluate the IRS treatment applications for residual efficacy against Anopheles mosquitoes, including the local An. coluzzii mosquito population. Cows were only used to attract mosquitoes into the huts and no tests were carried out directly on the cows. The author checklist is intended for use with studies where experiments are carried out on animals, which is why we have had such difficulty in completing this for the hut study, as many of the questions do not relate to how the cows were used
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