Search results for " critica"

Size dependence of the Josephson critical behavior in pyrolytic graphite TEM lamellae

2014

We have studied the transport characteristics of TEM lamellae of different widths obtained from a graphite sample with electrical contacts at the edges of the embedded interfaces. The temperature dependence of the resistance, as well as the current-voltage characteristics, are compatible with the existence of Josephson-coupled superconducting regions. The transition temperature at which the Josephson behavior sets in decreases with a decreasing interface width and vanishes for widths below 200 nm. This interface-size dependence provides an explanation for differences observed in the transport behavior of graphite-based samples with interfaces, and it appears to be related to the influence o…

Structure of longitudinal chromomagnetic fields in high energy collisions

2014

We compute expectation values of spatial Wilson loops in the forward light cone of high-energy collisions. We consider ensembles of gauge field configurations generated from a classical Gaussian effective action as well as solutions of high-energy renormalization group evolution with fixed and running coupling. The initial fields correspond to a color field condensate exhibiting domain-like structure over distance scales of order the saturation scale. At later times universal scaling emerges at large distances for all ensembles, with a nontrivial critical exponent. Finally, we compare the results for the Wilson loop to the two-point correlator of magnetic fields.

Psychological experience of patients 3 months after a stay in the intensive care unit: A descriptive and qualitative study.

2015

Abstract Purpose The purpose was to describe psychological experiences of patients 3 months after a stay in the intensive care unit (ICU) using qualitative methods. Methods Twenty patients underwent clinical interview lasting 1 hour and completed the Impact of Event Scale—Revised and Hospital Anxiety and Depression questionnaires. All interviews were recorded and coded using thematic analysis. Results All patients (100%) reported that they could not remember their ICU stay; half reported confused memories (50%) or disorientation (50%). Negatives memories were also reported (20%-45%), namely, pain, distress, sleep difficulties, noise, fear, feeling of abandonment; 20% reported positive memor…

Ground-state fidelity and bipartite entanglement in the Bose-Hubbard model.

2007

We analyze the quantum phase transition in the Bose-Hubbard model borrowing two tools from quantum-information theory, i.e. the ground-state fidelity and entanglement measures. We consider systems at unitary filling comprising up to 50 sites and show for the first time that a finite-size scaling analysis of these quantities provides excellent estimates for the quantum critical point.We conclude that fidelity is particularly suited for revealing a quantum phase transition and pinning down the critical point thereof, while the success of entanglement measures depends on the mechanisms governing the transition.

Bellotto Guglielmo

2014

Si delinea la personalità artistica del miniatore Guglielmo Bellotto, attivo nella prima metà del XV secolo, e si ricostruisce il catalogo delle sue opere

Scheda XLV San Francesco da Paola al cospetto di Papa Sisto IV

2019

The two large oil paintings on canvas depicting stories of the hagiography of the Saint of Paola, that are in the chapel to him dedicated in the Palermo church of the Order dei Minimi (Saint Francis from Paola in the presence of Pope Sixtus IV and Saint Francis from Paola baptizes the son of Charles VIII of France), are probably to be reported to Alessandro D'Anna (1746-1815 ca.)

Optimal doses of caspofungin during continuous venovenous hemodiafiltration in critically ill patients

2017

On the existence and multiplicity of solutions for Dirichlet's problem for fractional differential equations

2016

In this paper, by using variational methods and critical point theorems, we prove the existence and multiplicity of solutions for boundary value problem for fractional order differential equations where Riemann-Liouville fractional derivatives and Caputo fractional derivatives are used. Our results extend the second order boundary value problem to the non integer case. Moreover, some conditions to determinate nonnegative solutions are presented and examples are given to illustrate our results.

Systemic PaO2 oscillations cause mild brain injury in a pig model

2016

OBJECTIVE: Systemic PaO2 oscillations occur during cyclic recruitment and derecruitment of atelectasis in acute respiratory failure and might harm brain tissue integrity. DESIGN: Controlled animal study. SETTING: University research laboratory. SUBJECTS: Adult anesthetized pigs. INTERVENTIONS: Pigs were randomized to a control group (anesthesia and extracorporeal circulation for 20 hr with constant PaO2, n = 10) or an oscillation group (anesthesia and extracorporeal circulation for 20 hr with artificial PaO2 oscillations [3 cycles min⁻¹], n = 10). Five additional animals served as native group (n = 5). MEASUREMENTS AND MAIN RESULTS: Outcome following exposure to artificial PaO2 oscillations…

Ai confini della paura. Due percorsi nella narrativa italiana contemporanea

2019

The article is a comparative study of two contemporary Italian novels ("Scherzetto" by Domenico Starnone and "Dalle rovine" by Luciano Funetta) and it is meant to highlight the peculiar narrative logic of two horror stories, also investigating the relationship between obscenity, fear, tension and pornography.