1,721,107 research outputs found
Il sistema di contabilità ambientale delle aree marine protette: l'approccio biofisico
No full textSince 2014, 27 Italian Marine Protected Areas (MPAs) are involved in a national programme
devoted to the development and adoption of an environmental accounting system. The main goal of such a
system is the calculation of the ecological and economic value of the MPAs natural capital and of the
ecosystem functions and services generated. Environmental costs as well as the impacts related to human
activities in the MPAs will be also assessed. Finally, an overall balance and the assessment of net benefits
will be calculated. The outcomes of the project will be managed through an operational Web GIS platform
capable of spreading user-friendly information to local managers, policy makers, and other stakeholders
Free levator complex recession in Graves' ophthalmopathy. Our experience
No full textThe use of scleral graft has been suggested in patients with upper lid retraction due to thyroid ophthalmopathy to correct severe cases and to avoid unpredictable results. But this technique is more complicated than others and more time-consuming. The authors have used a free recession technique to deal with the functional and cosmetic problems of these patients. The results of a group of 60 patients (98 eyes) with Graves' ophthalmopathy who were referred to their institute over the last ten years and underwent eyelid surgery were evaluated. Free recession surgery achieved good results in 75% of all cases after one procedure. In spite of careful preoperative evaluation the remaining patients needed additional surgery to achieve a good final result. However, in some cases the outcome of the surgery in upper lid retraction remains unpredictable
Towards a Reappraisal of Crantor’s Role in the History of the Hellenistic Academy
No full textThis article outlines Crantor’s significant contribution to the intellectual and institutional history of the Academy in the first quarter of the 3rd century bce. Drawing on an earlier hypothesis by John Dillon, the author argues that Crantor caused a temporary ‘schism’—soon healed—within Polemo’s Academy by establishing a school of his own in the Asclepieion. He contends that this temporary ‘schism’ was due to disagreements between Crantor and Polemo in the field of ethics: Crantor, who opposed the Stoic idea of ἀπάθεια, did not accept the rigorism that characterised the first phase of Polemo’s ethical philosophy; however, once Polemo adopted a more moderate stance and aligned himself with Crantor, the ‘schism’ ceased to exist. Moreover, Crantor’s focus on human passions was connected to a more general reflection on the origins of evil and suffering and had a significant influence on Arcesilaus and on the sceptical turn of Academy
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
Insurance fraud detection: A statistically validated network approach
No full textFraud is a social phenomenon, and fraudsters often collaborate with other fraudsters, taking on different roles. The challenge for insurance companies is to implement claim assessment and improve fraud detection accuracy. We developed an investigative system based on bipartite networks, highlighting the relationships between subjects and accidents or vehicles and accidents. We formalize filtering rules through probability models and test specific methods to assess the existence of communities in extensive networks and propose new alert metrics for suspicious structures. We apply the methodology to a real database-the Italian Antifraud Integrated Archive-and compare the results to out-of-sample fraud scams under investigation by the judicial authorities
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