Search results for "RESTOR"

Architettura religiosa nei normanni di Sicilia e la fruizione e valorizzazione della chiesa dei Santi Filippo e Giacomo nel castello di Maredolce a P…

2014

Il poster riporta i contenuti del mio intervento al convegno “Fortificazione, memoria, paesaggio”, promosso in occasione dei Cinquant’anni di attività dell’Istituto Italiano dei Castelli, onlus, 1964-2014. Bologna 27-29 novembre 2014. Il convegno è stato organizzato dall’Istituto Italiano dei Castelli Onlus, dal Dipartimento di Storia Culture Civiltà Alma Matere Studiorum – Università di Bologna. Il saggio indaga l’architettura religiosa presente nei castelli normanni di Sicilia, quale espressione della cultura del tempo, pienamente incarnata nelle specifiche esigenze dell’architettura militare. In particolare nel saggio è studiata la chiesa dei Santi Filippo e Giacomo, con i suoi restauri …

A Novel Technique Using Polytetrafluoroethylene Tape to Solve Screw Loosening Complication in Implant-Supported Single Crowns

2020

This study aimed to analyze a novel technique to make screws with greater untightening resistance and to solve screw loosening in implant-supported single crowns. Thirty grade IV titanium straight abutments were screwed onto 30 external hex implants using grade IV titanium screws (30 Ncm). They were exposed to cyclic loading (300,000 cycles, 200 N). Samples were divided into 4 groups (15 samples per group): new screws (SCREW group) (control), reused screws (rSCREW group), new screws wrapped with polytetrafluoroethylene (PTFE) tape (PTFE group), and reused screws wrapped with PTFE tape (rPTFE group). Reverse torque values (RTVs) were recorded with a digitally calibrated implant motor. Mean R…

Nuclear DFT electromagnetic moments in heavy deformed open-shell odd nuclei

2022

Within the nuclear DFT approach, we determined the magnetic dipole and electric quadrupole moments for paired nuclear states corresponding to the proton (neutron) quasiparticles blocked in the p11/2- (n13/2+) intruder configurations. We performed calculations for all deformed open-shell odd nuclei with 63<=Z<=82 and 82<=N<=126. Time-reversal symmetry was broken in the intrinsic reference frame and self-consistent shape and spin core polarizations were established. We determined spectroscopic moments of angular-momentum-projected wave functions and compared them with available experimental data. We obtained good agreement with data without using effective g-factors or effective c…

Charm and hidden charm scalar mesons in the nuclear medium

2009

We study the renormalization of the properties of low-lying charm and hidden charm scalar mesons in a nuclear medium, concretely of the D-s0(2317) and the theoretical hidden charm state X(3700). We find that for the D-s0(2317), with negligible width at zero density, the width becomes about 100 MeV at normal nuclear-matter density, while in the case of the X(3700) the width becomes as large as 200 MeV. We discuss the origin of this new width and trace it to reactions occurring in the nucleus, while offering a guideline for future experiments testing these changes. We also show how those medium modifications will bring valuable information on the nature of the scalar resonances and the mechan…

The electronics of the energy plane of the NEXT-White detector

2019

[EN] This paper describes the electronics of NEXT-White (NEW) detector PMT plane, a high pressure xenon TPC with electroluminescent amplification (HPXe-EL) currently operating at the Laboratorio Subterraneo de Canfranc (LSC) in Huesca, Spain. In NEXT-White the energy of the event is measured by a plane of photomultipliers (PMTs) located behind a transparent cathode. The PMTs are Hamamatsu R11410-10 chosen due to their low radioactivity. The electronics have been designed and implemented to fulfill strict requirements: an overall energy resolution below 1% and a radiopurity budget of 20 mBq unit(-1) in the chain of Bi-214. All the components and materials have been carefully screened to assu…

A fully automated method for accurate measurement of geometrical distortion in magnetic resonance imaging of a 3D-lattice phantom

2019

Abstract This paper describes an automated method for extracting the apparent positions of fiducial points from 2D or 3D images of a phantom. We consider a 3D-lattice phantom for two main reasons: first, ease of manufacture and isotropy of its structure with respect to coordinate projections; second, a connected structure allowing to uniquely assess the adjacency relationship between fiducial points even if geometric distortions arising from main magnet inhomogeneity and gradient fields non-linearity is severe as observed in open-bore systems. In order to validate our proposed method and compare different choices for the parameters of our phantom (i.e. number and distance between grids and …

Old towns in “smart cities” between conservation and metamorphosis. Pending European Union guidelines

2014

In reflecting upon the role of environmental capital as represented by old towns in smart cities, the author reveals the consequences of re-plastering the facade of ancient buildings while emphasizing the resulting risk of globalization of historic districts. This is followed by a critical consideration concerning the active protection of old towns and their cultural typicality and geographical context, prerequisites for the development of specific guide-lines for the European Union. Explanation is also provided about how the restoration dynamics of the old towns are irreversibly changing the urban landscape in European cities. Strict regulations regarding the preservation of European old t…

Familial colorectal cancer risk: ESMO Clinical Practice Guidelines.

2010

Optimal tuning of tuned liquid column damper systems in random vibration by means of an approximate formulation

2014

Passive control devices are often added to slender and flexible systems in order to increase their structural safety. Several types of devices have been proposed in order to reduce the dynamic responses of different kind of structural systems. Among them, the tuned liquid column damper (TLCD) proved to be very effective in reducing vibration of various type of structures by means of a combined action which involves the motion of the liquid mass within the tube. The restoring force, in particular, is produced by the force of gravity acting on the liquid and the damping effect is generated by the hydrodynamic head losses that arise during the motion of the liquid inside the TLCD. Since the in…

Experimental strength of restorations with fibre posts at different stages, with and without using a simulated ligament

2011

The aim of this study was to analyse the strength and failure mode of teeth restored with fibre posts under retention and flexural-compressive loads at different stages of the restoration and to analyse whether including a simulated ligament in the experimental setup has any effect on the strength or the failure mode. Thirty human maxillary central incisors were distributed in three different groups to be restored with simulation of different restoration stages (1: only post, 2: post and core, 3: post-core and crown), using Rebilda fibre posts. The specimens were inserted in resin blocks and loaded by means of a universal testing machine until failure under tension (stage 1) and 50o flexion…