1,720,957 research outputs found
Soil and Groundwater Protection and Clean-up: Strategies and Perspectives for Quality Criteria at Italian and European Levels
No full text3rd Symposium “Quality and Management of Water Resources”, Italian-Russian Institute of Education and Ecological Researches, Saint Petersburg Universit
Soil and groundwater quality criteria for contaminated sites: from the Italian experience to the European situation and perspective
No full textDevelopment of quality objectives for contaminated sites: state of the art and new perspectives
No full textLocal soil contamination, mainly associated with industrial facilities (both in operation and after closure), uncontrolled (industrial and/or municipal) waste landfills, mining and diffused leaching underground storage tanks and pipelines, is an actual and relevant environmental priority in Europe. Different approaches have been applied in the European countries during the past few years to develop the quality objectives for contaminated sites according to the following three categories: the limit value criterion for soil and groundwater; the absolute risk analysis for a given contaminated site; and the comparative (or relative) risk analysis among different potentially contaminated sites. The present paper gives, together with a synthetic state of the art of the contaminated site management situation at different EU countries, a view on the current experience, problems and regulatory requirements in Italy on these possible soil and groundwater quality approaches, also with comparative considerations to other significant European and international strategies
Comparative risk analysis for contaminated sites: Italian regional criteria in comparison with international standards
No full textAccording to the Italian regulation on remediation activities (D.M. 471/99), comparative risk analysis plays a fundamental role in the evaluation of the priorities for clean-up actions on contaminated sites and gives important indications on the initial investigation strategy. Based on the US.EPA model "Hazardous Ranking System (MRS)" first developed in 1982 and successively modified, some regional comparative risk analysis criteria have been developed in Italy. A crucial point for the application of comparative risk analysis on a national scale is the development of a unique standard procedure that should include all the regional experiences, giving them a large-scale validity with the introduction of scores tested on site-specific characteristics. In this perspective, the paper presents a critical overview of the most relevant and recent Italian experiences on comparative risk analysis
Environmental quality of primary paper sludge
No full textThe reuse and recycling of waste paper sludge is increasing rapidly as far as the economical and positive environmental benefits are realised. In this study, primary sludge coming from a large production plant, located in the centre of Italy, was collected and the environmental quality of the sludge was assessed through geotechnical, physical and chemical analysis and leaching tests, as required by the Italian regulation on solid waste recovery. The results suggest that primary sludge from paper industry do not represent a major threat for the environment in regard to the heavy metal content. The use of this sludge for in situ applications appears an interesting avenue for an integrated management of waste from the paper industry. (C) 2004 Elsevier B.V. All rights reserved
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
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