5,641 research outputs found
Neurophysiological correlates of sleep leg movements in acute spinal cord injury
No full textAbstract not availableRaffaele Ferri, Paola Proserpio, Francesco Rundo, Andrea Lanza, Katrina Sambusida, Tiziana Redaelli, Fabrizio De Carli, Lino Nobil
HILLARY CLINTON. EMAILS TIMELINE
No full textThe text presents a chronology of the facts concerning the Hillary Clinton's email scandal. The American artist Kenneth Goldsmith uses the techniques of appropriation and collage he theorized and prints all the emails sent from that private domain between 2009 and 2013.
The the printed emails were exposed in the form of installation in the exhibition "Hillary. The Hillary Clinton emails" curated by the curatorial duo Francesco Urbano Ragazzi that took place in Venice (9 May-24 November 2019) in the framework of the 58. Biennale Arte
Rivoluzione islamica e ritorno: le speranze deluse della repubblica iraniana
No full textThis essay analyses the history of the Islamic Republic of Iran from its beginning in 1979 to the current political difficulties and delusions. It underlines how the regime has wasted most of its popular support and how the hopes for a real change are disappearing in Iran toda
Computer Modeling of Valve Disease: A New Old Technique to Understand and Predict Outcomes
No full textOptimizing the demand captured by a railway system with a regular timetable
No full textThe railway systems in various European countries adopt regular timetables, in which the trains arrive and depart at constant intervals. In fact, their simple structure provides several advantages both to the passengers and to the management of the service. The design of such timetables has recently received a certain attention in the literature, but the standard model aims to optimize the service for a fixed demand. We relax this unrealistic assumption, taking into account the reciprocal influence between the quality of the timetable and the amount of transport demand captured by the railway. This results into a mixed-integer non linear model with a non-convex continuous relaxation. We solve it by a branch-and-bound algorithm based on a piecewise-linear overestimate of the objective function and a heuristic algorithm which iteratively applies the standard fixed-demand model and a demand-estimation model, feeding each one with data based on the solution obtained from the other one at the previous iteration. The computational results presented concern both random instances and a real-world regional network located in Northwestern Italy
La guerra mondiale "a pezzi" tra incubo e speranza
No full textUna riflessione corale sul concetto di papa Francesco circa la "terza guerra mondiale a pezzi
On nonlinear systems of PDEs arising in the theory of large population differential games
No full textThis thesis is concerned with the study of stochastic differential games with many players, under structural hypotheses that differ from the classic ones of Mean Field Game theory. We focus on Nash equilibria and the systems of partial differential equations that describe them, within two main settings, namely games with sparse interactions and Generalised Mean Field Games.
In the first part of the thesis, we deal with network games with interactions between players governed by sparse graphs. We introduce the concept of unimportance of distant players and provide two precise declinations of it, one for open-loop and one for closed-loop games. Related implications are also investigated.
The main character of the second part is the Nash system, of parabolic equations of Hamilton-Jacobi-Bellman type, describing closed-loop equilibria. We make use of structural assumptions inspired by the unimportance of distant players to prove existence and uniqueness for a class of Nash systems in infinitely many dimensions.
Afterwards, we enter the framework of Generalised Mean Field Games and, for some N-player nonsymmetric Nash systems under hypotheses of semimonotonicity, we prove certain a priori estimates historically known to be both hard to obtain and crucial for a rigorous derivation of the Master Equation directly from of the Nash system as N diverges. Making use of such estimates in this bottom-up approach to the large population limit of the Nash system, we conclude by proving that in our context suitable generalisations of both the Mean Field system and a weak form of the Master Equation can be obtained
Functional and Biomechanical Effects of the Edge-to-Edge Repair in the Setting of Mitral Regurgitation: Consolidated Knowledge and Novel Tools to Gain Insight into Its Percutaneous Implementation
No full textMitral regurgitation is the most prevalent heart valve disease in the western population. When severe, it requires surgical treatment, repair being the preferred option. The edge-to-edge repair technique treats mitral regurgitation by suturing the leaflets together and creating a double-orifice valve. Due to its relative simplicity and versatility, it has become progressively more widespread. Recently, its percutaneous version has become feasible, and has raised interest thanks to the positive results of the Mitraclip(®) device. Edge-to-edge features and evolution have stimulated debate and multidisciplinary research by both clinicians and engineers. After providing an overview of representative studies in the field, here we propose a novel computational approach to the most recent percutaneous evolution of the edge-to-edge technique. Image-based structural finite element models of three mitral valves affected by posterior prolapse were derived from cine-cardiac magnetic resonance imaging. The models accounted for the patient-specific 3D geometry of the valve, including leaflet compound curvature pattern, patient-specific motion of annulus and papillary muscles, and hyperelastic and anisotropic mechanical properties of tissues. The biomechanics of the three valves throughout the entire cardiac cycle was simulated before and after Mitraclip(®) implantation, assessing the biomechanical impact of the procedure. For all three simulated MVs, Mitraclip(®) implantation significantly improved systolic leaflets coaptation, without inducing major alterations in systolic peak stresses. Diastolic orifice area was decreased, by up to 58.9%, and leaflets diastolic stresses became comparable, although lower, to systolic ones. Despite established knowledge on the edge-to-edge surgical repair, latest technological advances make its percutanoues implementation a challenging field of research. The modeling approach herein proposed may be expanded to analyze clinical scenarios that are currently critical for Mitraclip(®) implantation, helping the search for possible solutions
Task scheduling with conguration prefetching and anti-fragmentation techniques on dynamically recongurable systems
No full textPer uno studio contrastivo italiano-spagnolo delle interiezioni nei Promessi Sposi: il caso di eh
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