Search results for "riso"
showing 10 items of 1451 documents
From ‘Prisoner's Dilemma’ to Reluctance to Use Judicial Discretion: The Enemies of Cooperation in European Cross-Border Cases
2017
This article will focus on Articles 41–44 of the Recast European Insolvency Regulation (Regulation 2015/848) and the dynamic of cooperation and communication between courts and insolvency practitioners. Two main ideas will be maintained. The first is that cooperation requires a legal framework which is certain—otherwise, prescriptions imposing duties of cooperation and communication might produce ‘prisoner's dilemmas’ and, paradoxically, unwillingness to cooperate. The second idea is that prescriptions imposing duties of cooperation and communication have an intrinsic open texture—this characteristic ontologically requires courts and insolvency practitioners to make choices between differen…
L'ex convento e carcere di San Vito di Agrigento. Studi e proposte per la sua conservazione
2020
Il saggio “L’ex convento carcere di San Vito di Agrigento. Studi sulle trasformazioni e proposte per la sua conservazione” indaga l’antico convento dei frati Minori di Agrigento, trasformato nel sec. XIX in carcere di Agrigento. Il convento, costruito fuori le mura della città, era costituito dalla chiesa, dal chiostro e dal convento con le celle e gli spazi comuni dei frati. La nuova destinazione a carcere, con i lavori effettuati tra la metà del sec. XIX, primi e metà del sec. XX, ha in parte distrutto e occultato il convento medievale. Nell’Anno Accademico 2011-2012, i due corsi di Laboratorio di Restauro e Teoria e Storia del Restauro, del Corso di laurea in Architettura, sede di Agrige…
Empirical model evaluation and hypothesis testing
2016
Chapter 5 deals with the empirical model evaluation and the testing of hypotheses. It starts out with the evaluation of the measurement and the structural models, using the PLS algorithm. After the evaluation of the complete model, moderating effects are examined by conducting group comparisons (section 5.4.1) and by investigating interaction effects (5.4.2). After that, selected constructs are further examined by exploratory data analysis (section 5.5).
Finding k -dissimilar paths with minimum collective length
2018
Shortest path computation is a fundamental problem in road networks. However, in many real-world scenarios, determining solely the shortest path is not enough. In this paper, we study the problem of finding k-Dissimilar Paths with Minimum Collective Length (kDPwML), which aims at computing a set of paths from a source s to a target t such that all paths are pairwise dissimilar by at least \theta and the sum of the path lengths is minimal. We introduce an exact algorithm for the kDPwML problem, which iterates over all possible s-t paths while employing two pruning techniques to reduce the prohibitively expensive computational cost. To achieve scalability, we also define the much smaller set …
Anti-powers in infinite words
2018
In combinatorics of words, a concatenation of $k$ consecutive equal blocks is called a power of order $k$. In this paper we take a different point of view and define an anti-power of order $k$ as a concatenation of $k$ consecutive pairwise distinct blocks of the same length. As a main result, we show that every infinite word contains powers of any order or anti-powers of any order. That is, the existence of powers or anti-powers is an unavoidable regularity. Indeed, we prove a stronger result, which relates the density of anti-powers to the existence of a factor that occurs with arbitrary exponent. As a consequence, we show that in every aperiodic uniformly recurrent word, anti-powers of ev…
Qualitative Comparison of Community Detection Algorithms
2011
Community detection is a very active field in complex networks analysis, consisting in identifying groups of nodes more densely interconnected relatively to the rest of the network. The existing algorithms are usually tested and compared on real-world and artificial networks, their performance being assessed through some partition similarity measure. However, artificial networks realism can be questioned, and the appropriateness of those measures is not obvious. In this study, we take advantage of recent advances concerning the characterization of community structures to tackle these questions. We first generate networks thanks to the most realistic model available to date. Their analysis r…
Detecting informative higher-order interactions in statistically validated hypergraphs
2021
Recent empirical evidence has shown that in many real-world systems, successfully represented as networks, interactions are not limited to dyads, but often involve three or more agents at a time. These data are better described by hypergraphs, where hyperlinks encode higher-order interactions among a group of nodes. In spite of the large number of works on networks, highlighting informative hyperlinks in hypergraphs obtained from real world data is still an open problem. Here we propose an analytic approach to filter hypergraphs by identifying those hyperlinks that are over-expressed with respect to a random null hypothesis, and represent the most relevant higher-order connections. We apply…
Imputation Procedures in Surveys Using Nonparametric and Machine Learning Methods: An Empirical Comparison
2020
Abstract Nonparametric and machine learning methods are flexible methods for obtaining accurate predictions. Nowadays, data sets with a large number of predictors and complex structures are fairly common. In the presence of item nonresponse, nonparametric and machine learning procedures may thus provide a useful alternative to traditional imputation procedures for deriving a set of imputed values used next for the estimation of study parameters defined as solution of population estimating equation. In this paper, we conduct an extensive empirical investigation that compares a number of imputation procedures in terms of bias and efficiency in a wide variety of settings, including high-dimens…
The Max-Product Algorithm Viewed as Linear Data-Fusion: A Distributed Detection Scenario
2019
In this paper, we disclose the statistical behavior of the max-product algorithm configured to solve a maximum a posteriori (MAP) estimation problem in a network of distributed agents. Specifically, we first build a distributed hypothesis test conducted by a max-product iteration over a binary-valued pairwise Markov random field and show that the decision variables obtained are linear combinations of the local log-likelihood ratios observed in the network. Then, we use these linear combinations to formulate the system performance in terms of the false-alarm and detection probabilities. Our findings indicate that, in the hypothesis test concerned, the optimal performance of the max-product a…
Synergetic and redundant information flow detected by unnormalized Granger causality: application to resting state fMRI
2015
Objectives: We develop a framework for the analysis of synergy and redundancy in the pattern of information flow between subsystems of a complex network. Methods: The presence of redundancy and/or synergy in multivariate time series data renders difficult to estimate the neat flow of information from each driver variable to a given target. We show that adopting an unnormalized definition of Granger causality one may put in evidence redundant multiplets of variables influencing the target by maximizing the total Granger causality to a given target, over all the possible partitions of the set of driving variables. Consequently we introduce a pairwise index of synergy which is zero when two in…