1,720,965 research outputs found
3D hydrogeological reconstruction of the fault-controlled Euganean Geothermal System (NE Italy)
Get PDFData for geothermics paper submission (Article title: 3D hydrogeological reconstruction of the fault-controlled Euganean Geothermal System (NE Italy) DOI: https://doi.org/10.1016/j.enggeo.2020.105740
Numerical modelling as a tool to improve conceptual models: the case study of a regional hydrothermal system in NE Italy
No full textThe construction of a reliable conceptual model is a crucial aspect in modern hydrogeology. A detailed conceptual
model can be used as a starting point for a subsequent numerical model aimed to plan a sustainable utilization of the
hydrogeological resource. Usually, conceptual modelling of a regional, deep hydrothermal system is puzzling due to its
geological complexity or the lack of exhaustive data over a wide area. In this peculiar case, numerical modelling can be
used to validate the conceptual model evaluating some aspects of the flow. The Euganean Geothermal System in
Veneto Region (NE Italy) is the subject of still ongoing studies because the naturally emerging thermal water
(temperature from 65°C to 86°C) represents a profitable resource for the touristic industry, impacting the regional
economy. The thermal water is of meteoric origin, and infiltrates in Veneto Prealps to the north of the main
geothermal area (i.e., Euganean Geothermal Field, EGF). The water flows for 100 km in the subsurface of the central
Veneto heating up to 100°C by the crustal heat flux. The conduits hosting the fluid flow are identified in the damage
zones of the Schio-Vicenza fault system (SVFS), while the outflow in the EGF is associated to an interaction zone
between the SVFS faults. The stress concentration produces a localized high secondary permeability, maintaining the
aperture of the fractures. This work aims to validate this conceptual model through 3D coupled flow and heat
transport numerical simulations unravelling the impact of fracture networks on the regional-to-local groundwater
circulation. A reconstruction of the geological setting, including the high permeable zones, is performed. The
distribution of the hydraulic and thermal properties is reproduced using the equivalent porous medium approach and
discrete elements. The modelled temperature in the EGF reservoir results higher than in the surrounding areas,
according to the measured temperature distribution. This local increase is produced by the rising of deep-seated
groundwater driven by the local fractures. The results validate the proposed conceptual model. In addition, they
suggest that the temperature in the deeper part of the reservoir could be higher than the expected value, opening a
new scenario for the utilization of the thermal resource
Definition of the renewability degree of the faults-controlled Euganean Geothermal System (NE Italy)
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Going Beyond Counting First Authors in Author Co-citation Analysis
Get PDFThe 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
Get PDF“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
Get PDFWe 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
Numerical modeling as a tool for evaluating the renewability of geothermal resources: the case study of the Euganean Geothermal System (NE Italy)
Get PDFRenewability assessment; Geothermal system modeling; Unstructured mesh; Hydrogeological reconstruction; Euganean Geothermal Syste
Dispelling the Myths Behind First-author Citation Counts
Get PDFWe 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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