1,721,000 research outputs found
La criminalità minorile metropolitana: le tendenze recenti
No full textL’analisi delle dinamiche e delle tendenze della devianza minorile è stata concentrata, in ottica comparativa, sulle quattordici aree metropolitane presenti nel nostro Paese, in quanto i grandi centri urbani rappresentano i territori ove maggiormente si concentrano gli eventi delittuosi che vedono i minori come protagonisti. In questo capitolo, sarà analizzata la serie storica (2004-2022) delle denunce a carico di minori nelle aree metropolitane italiane. Lo studio di un periodo di tempo così consistente offre la possibilità di rilevare non solo le variazioni percentuali per le singole categorie di reato, ma di esaminarne l’andamento su un lasso di tempo più esteso, in modo da individuare picchi, regolarità le tendenze che non siano suscettibili di variazioni avvenute in una singola annualità
'Un Mecenate che distribuisce premij ai virtuosi' : The re-found portrait of the Marquis Niccolò Maria Pallavicini by Andrea Procaccini
No full textIn 2016, the Nationalmuseum in Stockholm received a bequest from the Swedish Office of Cadastral Survey. The bequeathed painting resulted to be the well-known but up to now lost portrait of the Marquis Niccolò Maria Pallavicini (1650-1714) painted by the Maratti pupil Andrea Procaccini (1671-1734) in 1707. The painting, well-known to the scholars in the field, was conceived as a pendent to the portrait of the Marquis by the very same Maratti, namely the Marchese Niccolò Maria Pallavicini guided to the Temple of Virtue by Apollo with a Self-Portrait of the Artist, part of the Hoare Collection/National Trust and displayed at Stourhead in Wiltshire. The recovery of the Stockholm portrait enables to complete the recent scholarship on Pallavicini as patron of the arts and to restore an important art work to the field of study on Settecento Rome.</p
GaussDCA.jl - First release
No full text<p>This is the code which accompanies the paper "Fast and accurate multivariate Gaussian modeling of protein families: Predicting residue contacts and protein-interaction partners" by Carlo Baldassi, Marco Zamparo, Christoph Feinauer, Andrea Procaccini, Riccardo Zecchina, Martin Weigt and Andrea Pagnani, (2014) PLoS ONE 9(3): e92721. doi:10.1371/journal.pone.0092721</p>
<p>This version contain minor bugfixes with respect to what was described in the paper.</p>
Phenomenology of doubly special relativity
No full textInvestigations of the possibility that some novel "quantum" properties of space-time might induce a Planck-scale modification of the energy/momentum dispersion relation focused at first on scenarios with Planck-scale violations of Lorentz symmetry, with an associated reduced n-parameter (n < 6) rotation-boost symmetry group. More recently several studies have also considered the possibility of a "doubly special relativity," in which the modification of the dispersion relation emerges from a framework with both the Planck scale and the speed-of-light scale as characteristic scales of a 6-parameter group of rotation-boost symmetry transformations (a deformation of the Lorentz transformations). For the schemes with broken Lorentz symmetry at the Planck scale there is a large literature on the derivation of experimental limits. Here we show that the analysis of the experimental limits could be significantly different in a doubly-special-relativity framework. We find that the study of photon stability, synchrotron radiation, and threshold conditions for particle production in collision processes, the three contexts which are considered as most promising for constraining the broken-Lorentz-symmetry scenario, should not provide significant constraints on a doubly-special-relativity parameter space. However, certain types of analyses of gamma-ray bursts should be sensitive to the symmetry deformation. A key element of our study is an observation that removes a possible sign ambiguity for the doubly-special-relativity framework. This result also allows us to characterize more sharply the differences between the doubly-special-relativity frame,work and the framework of kappa-Poincare Hopf algebras, two frameworks which are often confused with each other in the literature
A glimpse at the flat-spacetime limit of quantum gravity using the bekenstein argument in reverse
Full text linkAn insightful argument for a linear relation between the entropy and the area of a black hole was given by Bekenstein using only the energy-momentum dispersion relation, the uncertainty principle, and some properties of classical black holes. Recent analyses within String Theory and Loop Quantum Gravity describe black-hole entropy in terms of a dominant contribution, which indeed depends linearly on the area, and a leading log-area correction. We argue that, by reversing the Bekenstein argument, the log-area correction can provide insight on the energy-momentum dispersion relation and the uncertainty principle of a quantum-gravity theory. As examples, we, consider the energy-momentum dispersion relations that recently emerged in the Loop Quantum Gravity literature and the Generalized Uncertainty Principle that is expected to hold in String Theory
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
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