1,720,974 research outputs found
Calcolabilità e probabilità. Per discutere di “incontrollabile soggettivismo della decisione”
No full textChe ha da vedere il diritto con il calcolo del futuro, con la possibilità che un fatto accada o non accada? Ecco l'interrogativo che si sono posti gli studiosi che hanno contribuito a questo volume: filosofi, giuristi e matematici finanziari riuniti insieme, che qui dialogano e riflettono sulla disgiunzione tra il «sapere tecnico-economico» e il «sapere giuridico», oltre che sui problemi connessi al valutare, al prevedere, al giudicare. Le loro riflessioni ruotano attorno al tema della calcolabilità giuridica, che Max Weber individua come un fattore costitutivo del capitalismo occidentale, cui si contrappone il rischio di un «diritto incalcolabile». Con scritti di Guido Alpa, Giovanni Canzio, Alessandra Carleo, Massimo De Felice, Giorgio De Nova, Andrea Di Porto, Natalino Irti, Giovanni Legnini, Franco Moriconi, Carlo Mottura, Mario Nuzzo, Valerio Onida, Filippo Patroni Griffi, Alberto Quadrio Curzio, Pietro Rossi
On matrix exponential distribution in risk theory
No full textIn this paper, a particular class of matrix-exponential distributions is described, also with respect to its use in risk theory, namely phase-type distributions. Phase-type distributions have the important advantage of being suitable for approximating most of other distributions as well as being mathematically tractable.
After a review on phase-type distributions and their properties, a possible use in risk theory is illustrated. Modelling both interarrival claim times and individual claim sizes with this class of distributions an explicit formula for the probability of ultimate ruin is given
The mathematical framework underlying the “scenarios" approach for derivate transactions by Italian local Authorities
No full text"\"On September, 2009 the Italian Ministry of Economy and Finance issued a proposal for the. regulation of derivatives contracts that Italian local Authorities are allowed to subscribe. The proposal. outlines the information that should be provided in the contracts in order to assure an appropriate. level of disclosure. Moreover, the proposal has introduced an approach based on so-called \"scenarios\". which are used to compare the effectiveness of the use of derivatives.. We have analysed the mathematical framework underlying the above \"scenarios\" approach, showing. that it is suited to treat - in a mathematical consistent way - the comparison between the original. liability and the liability after the subscription of the derivative only for a very particular set of cases.\"
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
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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