Ca' Foscari University of Venice

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    La Passione alla maniera di Euripide. La ripresa della tragedia classica nel Christus Patiens.

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    L’intervento si propone di indagare le forme di ripresa della tragedia classica e in particolare di quella euripidea all’interno del Christus Patiens e di valorizzare il tentativo di riproposizione della grande tragedia antica nell'età bizantina. Il Christus Patiens è una cronaca della Passione di Cristo redatta, secondo quanto dichiara l’anonimo autore, «alla maniera di Euripide», traendo cioè interi versi o emistichi dalla tradizione tragica dell’Atene del V secolo, integrandoli insieme a partire da tragedie diverse e facendoli confluire in un’opera nuova, dall’impianto ideologico completamente diverso, che costituisce una rilettura della vicenda di Cristo in chiave tragica. Tra le tragedie riutilizzate nel testo, che si configura come un vero e proprio centone tragico, spiccano soprattutto le euripidee Medea, Baccanti, Ippolito, ma compaiono anche le eschilee Prometeo e Agamennone; proprio per la sua natura di centone, il Christus Patiens ha un’importanza particolare per la filologia, in quanto preservatore di alcuni versi delle Baccanti euripidee, purtroppo pervenuteci multile nel finale. Che si tratti di un’opera ancora tardoantica di IV/V secolo, come sostenuto da Antonio Garzya, o di un testo già pienamente medievale di VIII/IX secolo, secondo l’analisi di Enrica Follieri, il Christus Patiens rappresenta in ogni caso l’espressione di una fortissima volontà di appropriazione degli stilemi e della bellezza incrollabile della letteratura classica, di fusione tra due mondi e due mentalità diverse, ma per nulla inconciliabili, un atto d’amore della cultura cristiana nei confronti di quella pagana

    Extending Abstract Interpretation to Dependency Analysis of Database Applications

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    Dependency information (data- and/or control-dependencies) among program variables and program statements is playing crucial roles in a wide range of software-engineering activities, e.g. program slicing, information flow security analysis, debugging, code-optimization, code-reuse, code-understanding. Most existing dependency analyzers focus on mainstream languages and they do not support database applications embedding queries and data-manipulation commands. The first extension to the languages for relational database management systems, proposed by Willmor et al. in 2004, suffers from the lack of precision in the analysis primarily due to its syntax-based computation and flow insensitivity. Since then no significant contribution is found in this research direction. This paper extends the Abstract Interpretation framework for static dependency analysis of database applications, providing a semantics-based computation tunable with respect to precision. More specifically, we instantiate dependency computation by using various relational and non-relational abstract domains, yielding to a detailed comparative analysis with respect to precision and efficiency. Finally, we present a prototype semDDA, a semantics-based Database Dependency Analyzer integrated with various abstract domains, and we present experimental evaluation results to establish the effectiveness of our approach. We show an improvement of the precision on an average of 6% in the interval, 11% in the octagon, 21% in the polyhedra and 7% in the powerset of intervals abstract domains, as compared to their syntax-based counterpart, for the chosen set of Java Server Page (JSP)-based open-source database-driven web applications as part of the GotoCode project

    205. Pittore veneto, seconda metà del XVI secolo, ritratto d'uomo

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    Scheda di catalogo del dipinto inv. 6788-1B19 del museo di Castelvecchio a Veron

    267. Pittore veronese, seconda metà del XVI secolo, Apostolo (san Pietro?)

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    Scheda di catalogo del dipinto inv. 5380 del museo di Castelvecchio a Verona

    Bias-corrected estimation of the Rudas-Clogg-Lindsay mixture index of fit

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    Rudas, Clogg and Lindsay (1994) introduced the so-called mixture index of fit, also known as pi-star (*), for quantifying goodness-of-fit of a model. It is the lowest proportion of „contamination”, which, if removed from the population or from the sample, makes the fit of the model perfect. The mixture index of fit has been widely used in psychometric studies. We show that the asymptotic confidence limits proposed by Rudas et al. (1994) as well as the jackknife confidence interval by Dayton (2003) perform poorly, and propose a new bias-corrected point estimate, a bootstrap test and confidence limits for the pi-star. The proposed confidence limits have coverage probability much closer to the nominal level than the other methods do. We illustrate that the proposed method is useful in practice by presenting some practical applications to loglinear models for contingency tables

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