Search results for " Open"
showing 10 items of 439 documents
The development of anticipation in the fetus: A longitudinal account of human fetal mouth movements in reaction to and anticipation of touch
2013
Research suggests that fetuses open or close their mouth in relation to directed movements but it is unclear whether mouth opening anticipates the touch or is a reaction to touch, as there has been no analysis so far of (1) the facial area of touch and (2) the sequential ordering of touch and mouth movements. If there is prenatal development of the anticipation of touch we would expect the frequency of fetal mouth opening immediately preceding the arriving hand at the mouth area to increase with fetal age. Fifteen healthy fetuses, eight girls and seven boys, underwent four additional 4-D scans at 24, 28, 32, and 36 weeks gestation. Changes in the frequency of touch for different facial regi…
Cold-Atom-Induced Control of an Optomechanical Device
2010
We consider a cavity with a vibrating end mirror and coupled to a Bose-Einstein condensate. The cavity field mediates the interplay between mirror and collective oscillations of the atomic density. We study the implications of this dynamics and the possibility of an indirect diagnostic. Our predictions can be observed in a realistic setup that is central to the current quest for mesoscopic quantumness.
Financial and fiscal shocks in the great recession and recovery of the Spanish economy
2020
In this paper we develop and estimate a new Bayesian DSGE model for the Spanish economy that has been designed to evaluate different structural reforms. The small open economy model incorporates a banking sector, consumers and entrepreneurs who accumulate debt, and a rich fiscal structure and monopolistic competition in products and labor markets, for a country in a currency union, with no independent monetary policy. The model can be used to evaluate ex-ante and ex-post policies and structural reforms and to decompose the evolution of macroeconomic aggregates according to different shocks. In particular, we estimate the contribution of financial and fiscal shocks to both the crisis of the …
The distributional effects of capital account liberalization
2018
Abstract Episodes of account liberalization increase the Gini measure of inequality, based on panel data estimates for 149 countries from 1970 to 2010. These episodes are also associated with a persistent increase in the share of income going to the top. We investigate three channels through which these impacts could occur. First, the impact of liberalization on inequality is stronger where credit markets lack depth and financial inclusion is low; positive impacts of liberalization on poverty rates also vanish when financial inclusion is low. Second, the impact on inequality is also stronger when liberalization is followed by a financial crisis. Third, liberalization seems to alter the rela…
Testing the Stage-Discharge Relationship in Sloping SMBF Flumes
2021
The Samani, Magallanez, Baiamonte, Ferro (SMBF) flume is a simple and inexpensive instrument for indirect discharge measurement that was originally proposed for use in a horizontal channel and then also applied in sloping channels. The contraction of the flow cross section, aimed at establishing a critical flow condition, is simply obtained by applying two half cylinders to the walls of a rectangular cross section. In this paper a theoretical approach previously proposed for a horizontal SMBF flume is first extended to a sloping SMBF flume and a new stage-discharge relationship is deduced. Then, this equation is experimentally tested using laboratory measurements from literature for differe…
Unveiling signatures of topological phases in open kitaev chains and ladders
2019
In this work, the general problem of the characterization of the topological phase of an open quantum system is addressed. In particular, we study the topological properties of Kitaev chains and ladders under the perturbing effect of a current flux injected into the system using an external normal lead and derived from it via a superconducting electrode. After discussing the topological phase diagram of the isolated systems, using a scattering technique within the Bogoliubov de Gennes formulation, we analyze the differential conductance properties of these topological devices as a function of all relevant model parameters. The relevant problem of implementing local spectroscopic measurement…
Mappings of Finite Distortion : Compactness of the Branch Set
2017
We show that an entire branched cover of finite distortion cannot have a compact branch set if its distortion satisfies a certain asymptotic growth condition. We furthermore show that this bound is strict by constructing an entire, continuous, open and discrete mapping of finite distortion which is piecewise smooth, has a branch set homeomorphic to an (n - 2)-dimensional torus and distortion arbitrarily close to the asymptotic bound. Peer reviewed
Time-based Chern number in periodically driven systems in the adiabatic limit
2023
To define the topology of driven systems, recent works have proposed synthetic dimensions as a way to uncover the underlying parameter space of topological invariants. Using time as a synthetic dimension, together with a momentum dimension, gives access to a synthetic two-dimensional (2D) Chern number. It is, however, still unclear how the synthetic 2D Chern number is related to the Chern number that is defined from a parametric variable that evolves with time. Here we show that in periodically driven systems in the adiabatic limit, the synthetic 2D Chern number is a multiple of the Chern number defined from the parametric variable. The synthetic 2D Chern number can thus be engineered via h…
Paesaggi e virtualità: il caso dei videogiochi open world
2021
Il capitolo prende in considerazione il caso di tre recenti videogiochi che, (ri)producendo peculiari forme di spazialità, costruiscono complessi paesaggi virtuali e sistemi di interazioni multistratificate al fine di sviluppare una riflessione dalla prospettiva della geografia culturale. Tutti e tre rientrano (anche se con sfumature diverse) nello stesso genere, denominato "open world" oppure "free roaming", termini che fanno riferimento alla modalità di gioco, incentrata soprattutto sull’esplorazione di un “mondo” virtuale
Overionization in X-ray spectra: a new paradigm for Mixed-Morphology SNRs
2011
Mixed-morphology SNRs are characterized by a shell-like radio emission, a centrally peaked X-ray morphology, and by interaction with molecular clouds. Many models have been proposed to explain these peculiar remnants, but their physical origin is still unclear. The recent discovery of over-ionized (i. e. recombining) ejecta in 3 mixed-morphology SNRs has dramatically challenged all the previous models and opened up new, unexpected scenarios. I review the main properties of these remnants and their peculiar X-ray spectral properties. I also discuss the hydrodynamic model developed to explain the presence of over-ionized ejecta in W49B and present a list of open issues that still need to be c…