1,721,070 research outputs found
Dall'Accordo Generale Sulle Tariffe e Sul Commercio all'Organizzazione Mondiale per il Commercio
No full textCALIBRATION OF THE GROUNDWATER FLOW MODEL AND ASSESSMENT OF THE SALTWATER INTRUSION IN A MULTI-LAYERED AQUIFER SYSTEM OF THE IONIAN COASTAL AREA (TARANTO GULF, SOUTHERN ITALY)
Full text linkIn some Mediterranean karst areas, groundwater is often the only available supply for freshwater. Besides the contamination induced by human activities, coastal aquifers often suffer from the saltwater intrusion phenomenon, which can be enhanced by both extensive withdrawals and climatic changes. Establishing an effective set of regulatory and management measures to ensure the sustainability of coastal aquifers requires a deep knowledge about natural and anthropic stresses involved in groundwater dynamics. In this regard, a prior conceptualization of aquifer systems and a deeper characterization of balance terms through mathematical modelling are of paramount importance.
In the gulf of Taranto (southern Italy), these issues are particularly pressing, as the multi-layered, carbonatic aquifer is the only available resource of freshwater and satisfies most of the human water-related activities. Especially during the last decades, proper management plans and decisions seem to be compelling, as the national government included Taranto in the list of the contaminated sites of national importance, due to the presence of highly-polluting activities nearby the Mar Grande and Mar Piccolo seawater bodies, whose relationship with the underground resources is matter of concern, as they host important freshwater springs. Furthermore, the Taranto area is particularly sensitive to the phenomenon of seawater intrusion, both for the specific hydrostratigraphic configuration and for the presence of highly water-demanding industrial activities. These problems, strictly related to the protection and preservation of groundwater quality and quantity, have triggered several actions. Among them, the Flagship Project RITMARE (la Ricerca Italiana per il Mare - the Italian Research for the Sea) took into account criticalities involving several environmental components within the Mar Piccolo ecosystem, including groundwater.
In this thesis, a full charactrization of the multi-layered aquifer system of the whole Province of Taranto is presented, with the purpose of supporting monitoring activities, land-use plans and management decisions. The preliminary outcomes refer to the identification of the conceptual model, namely the reconstruction of the hydrostratigraphic structure of the underground and the qualitative assessment of the groundwater dynamics. The successive development of a numerical model permits to produce a tool for quantifying the hydrogeological balance and simulating the system response to climate or man-induced changes.
Generally speaking, thorough evaluation of model adequacy and/or accuracy is an important step in the study of environmental systems, due to the uncertainties on hydrodynamic properties and boundary conditions and to the scarcity of good-quality field data. This commonly results in groundwater models being calibrated and often leads to the development of many candidate models that can differ in the analysed processes, representation of boundary conditions, distribution of system characteristics, and parameter values. In this framework, calibration of alternative models allowed to identify the main challenges which limit the reliability of model outcomes and test model adequacy while proposing a new calibration methodology, which represents tha major scientific contribution of this thesis
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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