1,722,290 research outputs found
Time-consistent policy and politics: does voting matter when individuals are identical?
Get PDFWe consider the implications of a lack of policy commitment when policies are chosen through a political process and individuals are ex-ante identical. We show that politics, by allowing ex-post distributional tensions to shape policy, can make it possible to sustain non-trivial equilibria in which the commitment problem is alleviated or fully eliminated. How effective politics can be at countering collective commitment problems in homogeneous groups depends on the nature of the political process and on the extent to which private choices are public information
[Paolo Perroni (detail), Donato Barcaglia, Cimitero Urbano, Gravedona., funerary sculpture]
No full textFrom Berresford: Paolo Perroni (detail), Donato Barcaglia, Cimitero Urbano, Gravedona.Man sitting on bale of merchandise.Title from Berresford
Il corso di Matematica proposto dal Polo di Trieste del Progetto “I Lincei per una nuova didattica nella scuola: una rete nazionale” nell’a. a. 2019-20
Get PDFCronaca del corso di Matematica proposto dal Polo di Trieste del Progetto “I Lincei per una nuova didattica nella scuola: una rete nazionale” nell’a. a. 2019-20, con qualche riflessione finale
Smooth covers of moduli stacks of Riemann surfaces with symmetry
Get PDFWe construct explicitly a finite cover of the moduli stack of compact Riemann surfaces with a given group of symmetries by a smooth quasi-projective variety
Energy cost and energy sources of an elite female soccer player to Repeated Sprint Ability Test: a case study
Get PDFBackground: Intense physical efforts performed at maximal or near-maximal speeds and the ability to recover among sprint are important characteristics of a soccer player. In the last years, women's soccer has become a rapidly and markedly growing sport (+34% of new players from 2000). Objective: The aim of this case study was to analyse the performance (total time –TT; fatigue index percentage-IF%) and physiological (aerobic and anaerobic) responses to Repeated Sprint Ability test (RSAt) of an elite female player. Methods: To identify the contribution of the 3 energy sources at the beginning, middle, and at the end of the different sprint of RSAt performance in a female player (age: 30 years; BMI: 20.3 kg/m 2 ), which requested 7x30 m sprints (25 s active recovery among sprints) with a change of direction, a portable metabolimeter and software dedicated were used. A repeated measure MANOVA over the 7 sprints time series was applied (p< 0.05). Results: Results showed that TT was 58.71 s (Ideal Time: 56.98 s) with IF% of 3.0%. Energy contributions were given for 80.3% by aerobic, 19.2% by anaerobic lactid, and 0.5% by anaerobic alactid sources. We have found different kinetics in the heart rate (HR) and maximum oxygen uptake with the oxygen uptake that reached the peak when HR was still rising. Conclusion: Considering that the energy consumption during intermittent exercises requires different metabolism as a result of physiological stimuli proposed, the present findings substantiate the need to choose specific and adequate training methods for female soccer players that aim at increasing their RSA performances. © 2019 Perroni et al
Orbifold Cohomology of ADE-singularities
No full textIn Chapter 1 we collect some basic definitions on orbifolds, morphisms of orbifolds and orbifold vector bundles. In Chapter 3 we first review the definition of orbifold cohomology ring for a complex orbifold, then we state the cohomological crepant resolution conjecture as given by Ruan in [52]. In Chapter 4 we define orbifolds with transversal ADE-singularities, see Definition 4.2.5. Then we give a description of the twisted sectors in general.
Finally we specialize to orbifolds with transversal A_n-singularities and, under the technical assumption of trivial monodromy, we compute the orbifold cohomology ring. In Chapter 5 we study the crepant resolution. We first show
that any variety with transversal ADE-singularities Y has a unique crepant resolution p : Z --> Y, Proposition 5. 2 .1. Then we restrict our attention to the case of transversal An-singularities and trivial monodromy and we give an explicit description of the cohomology ring of Z. Chapter 6 contains the computations of the Gromov-Witten invariants of Z in the A_n case. We also give a description of the quantum corrected cohomology ring of Z. In Chapter
7 we prove Ruan's conjecture in the Ai case and, in the A2 case with minor modifications
Automorphisms of rational manifolds of positive entropy with Siegel disks
No full textUsing McMullen’s rational surface automorphisms, we construct projective rational manifolds of higher dimension admitting automorphisms of positive entropy with arbitrarily high number of Siegel disks and those with exactly one Siegel disk
The fundamental group of a quotient of a product of curves
No full textWe prove a structure theorem for the fundamental group of the quotient X of a product of curves by the action of a finite group G and, hence, for that of any resolution of the singularities of X
Robotic segmentectomy S7 + S8 with the use of indocyanine green (ICG): technical details
Get PDFIn the last few years, segmentectomy has become a popular alternative procedure with curative intent to standard lobectomy in selected cases, like peripheral ground glass opacities (GGOs) less than 2 cm or patients non suitable for lobectomy. In the setting of a minimally invasive surgery, use of the robotic system Da Vinci has proved to be a safe and feasible approach with better dexterity and lower length of stay compared to video-assisted thoracic surgery (VATS). Moreover, intravenous administration of indocyanine green (ICG) during surgery dramatically improve identification of targeted segment(s) thus sparing a certain amount of healthy lung with better conservation of respiratory function. We hereby show a step-by-step guide to perform a robotic-assisted segmentectomy of right S7 + S8 with the use of ICG for intersegmental plane identification
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