1,721,003 research outputs found
la gestione delle terre e rocce di scavo - parte 1 (Normativa di Riferimento)
No full textLa corretta gestione delle terre e rocce da scavo (di seguito citate con l’acronimo TRS) rappresenta un aspetto controverso e non completamente definito e normato in modo chiaro all’interno della legislazione ambientale italiana. E’ opportuno richiamare all’importanza che ricopre questo aspetto nella vita dei cantieri edili e infrastrutturali, quali appunto la costruzione di opere sotterranee, in cui vi sia la produzione di ingenti volumi di materiale di scavo la cui gestione può rappresentare un consistente capitolo di spesa, e dove la scelta tra il riutilizzo o lo smaltimento delle TRS in discarica può tradursi in dispendiosi oneri finanziari. Con la presente pubblicazione si vogliono in primo luogo riassumere gli aspetti normativi principali che riguardano la gestione delle TRS anche alla luce dei più recenti aggiornamenti, in modo da indirizzare ed agevolare il lettore all’interno dell’articolata normativa ambientale, ma anche mettere in luce le problematiche che possono sorgere in relazione alla presenza di materiali contaminati ed ai vincoli imposti dalla legislazione verso la sempre più delicata questione dell’inquinamento ambientale. A livello nazionale, la legge “madre” che recepisce la maggior parte delle precedenti normative e Direttive Europee, con continui aggiornamenti dovuti soprattutto all’evoluzione della legislazione comunitaria, è il Decreto Legislativo 3 Aprile 2006 n.152 “Norme in materia ambientale”. Tale norma, come sopra detto, è in continuo aggiornamento: ha già recepito due decreti correttivi, l’ultimo è il D.Lgs. 16 Gennaio 2008 n. 4, e viene integrato attraverso ulteriori modifiche per adeguarsi soprattutto alle esigenze dettate dalle direttive europee. Ai fini di questa pubblicazione la Parte IV (Norme in materia di gestione dei rifiuti e di bonifica dei siti contaminati) del D.Lgs. 152/06 e s.m.i. contiene le linee guida per la gestione delle TRS, dei rifiuti e dei siti contaminati
la gestione delle terre e rocce dascavo parte 2 (Descrizione di un impianto di lavaggio delle terre e rocce da scavo)
No full textThe treatment of contaminated soil could be in many cases the best solution to obtain secondary raw materials and to save money avoiding dump disposal. This article deals with the Soil Washing technology. The aim is to make the reader aware of what this kind of plants can do in the soil remediation field. In a Soil Washing plant the contaminated materials passes through different treatment units carried on by water. The final purpose is to separate pollutants from the natural matrix using chemicals and/or physical processes and to concentrate the contaminated fraction. In this way there are two main outputs from the plants: a major part of “cleaned” soil that could be recovered as a secondary raw material, and a minor part of dried sludge that contain pollutants. A good comprehension of the pollution is required to build an efficient Soil Washing plants. In fact the most suitable treatment units have to be chosen and put in the right sequence to get the purpose of removing contaminants until their concentrations are under the legal thresholds. Even if a great amount of water is requested, almost all of it could be recycled and reused in the same plant. The possibility of building a washing plant on site is another positive aspect of this remediation technology and allows to avoid the transportation of soil and the pollution caused by vehicles. The costs of this technology are covered by the saving of disposal costs and by the recovery of secondary raw materials obtained with the remediation processes. This technology could be applied also to some kind of waste
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
Author-wise bibliometric analysis based on entropy.
No full textAuthor-wise bibliometric analysis based on entropy.</p
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