Search results for " Dual"
showing 10 items of 154 documents
Introduction - The "Rivista Internazionale di Scienze Sociali" in the Post-war Years (1945-1960)
2014
What can we learn from Long Time Series? Italian Living Standards after Unification and Dualism North-South
2012
Using Italian time series since 1861, we explore the evolution of living standards afterpolitical unification both at the national and at the territorial level. Firstly, we use univariate statistical analysis on homogeneous national time series. Secondly, we employ available homogeneous series at a disaggregated level to measure territorial disparities across regions and four macro-areas. Notwithstanding that time convergence occurred quite rapidly at the national level after WWII, territorial differences became more marked in the period 1936-1951, both in terms of material and social well-being.However, in the final decades of the 20th century disparities among the macro-areas declined, es…
Studenti in calo e in fuga: quale è il destino degli atenei siciliani?
2015
Negli ultimi anni si è assistito a un notevole decremento delle immatricolazioni in generale, e in Sicilia in particolare, a cui sono anche corrisposte maggiori immatricolazioni di siciliani nelle università del Centro-Nord. Dalle analisi dei dati ufficiali del MIUR è emerso che le variabili con maggiore influenza nei confronti del calo delle immatricolazioni in totale sono i diplomati che non provengono dal liceo e le aree disciplinare sociali e umanistiche. Questi elementi sembrano delineare un panorama universitario in cui non c’è più posto per le lauree “deboli” e gli studenti “deboli”. In questo quadro sconfortante si inserisce la riduzione dei trasferimenti ministeriali che hanno subi…
Analysis of stamping performances of dual phase steels: A multi-objective approach to reduce springback and thinning failure
2009
The industrial interest on light weight components has contributed in the last years to a significant research effort on new materials able to guarantee high mechanical properties, good formability and reasonable costs together with reduced weights when compared to traditional mild steels. Among such materials advanced high strength steels (AHSS) such as transformations induced plasticity (TRIP) and dual phase (DP), and light weight alloys proved their usefulness in stamping of automotive components. As AHSS are concerned, one of the main drawbacks is related to springback occurrence. Many aspects have to be taken into account when springback reduction is investigated: material behavior iss…
Structures with Surface-Bonded PZT Piezoelectric Patches: a BEM Investigation into the Strain-transfer Mechanism for SHM applications
2009
In this work a three-dimensional BEM model is used for the analysis of structures with cracks and surface bonded piezoelectric PZT patches used as strain sensors. The cracked structure is modelled by the dual boundary element method, which allows for accurate and reliable crack analysis, while the piezoelectric patch is analyzed by a finite element state-space approach, that embodies both the full electro-mechanical coupling and the suitable sensor’s boundary conditions. The model is used to investigate the strain-transfer mechanism from an host elastic structure to the piezoelectric layer, taking into account the effect of the adhesive layer, as well as the mechanical interaction between t…
Metallurgical Evolutions in Hot Forging of Dual Phase Titanium Alloys: Numerical Simulation and Experiments
2015
Titanium forging has been encountering a growing interest in the scientific and industrial communities because of the distinct advantages it provides with respect to machining, in terms of both mechanical properties of the product and material waste, thus significantly reducing the Buy to Fly ratio. In the paper, a numerical FE model, based on a tri-coupled approach and able to predict the microstructural evolutions of the workpiece during the process, is developed and set up. Calculated results are compared to experiments for a few industrial case studies. The final phases distribution in the forged parts is experimentally measured and compared to the FE model output finding satisfying ove…
Interventions aimed at reducing obsessive-compulsive symptoms in people with autism spectrum disorder: A review
2021
espanolEl trastorno del espectro autista (TEA) es un trastorno del neurodesarrollo caracterizado por deficits en la comunicacion e interaccion social y por comportamientos restrictivos y repetitivos. Presenta una elevada comorbilidad con otros trastornos, de hasta un 37% con el trastorno obsesivo compulsivo (TOC) en pacientes jovenes. El TOC se caracteriza por pensamientos e ideas recurrentes que llevan a la persona a realizar acciones compulsivas para disminuir el nivel de ansiedad que estos pensamientos le generan. Este trabajo presenta una revision de los metodos psicologicos de intervencion utilizados, asi como de la efectividad de los mismos, en la reduccion de los sintomas del TOC com…
Dual Inequalities for Stabilized Column Generation Revisited
2014
Column generation (CG) models have several advantages over compact formulations: they provide better linear program bounds, may eliminate symmetry, and can hide nonlinearities in their subproblems. However, users also encounter drawbacks in the form of slow convergence, also known as the tailing-off effect, and the oscillation of the dual variables. Among different alternatives for stabilizing the CG process, Ben Amor et al. [Ben Amor H, Desrosiers J, Valério de Carvalho JM (2006) Dual-optimal inequalities for stabilized column generation. Oper. Res. 54(3):454–463] suggest the use of dual-optimal inequalities (DOIs) in the context of cutting stock and bin packing problems. We generalize th…
Development and characterization of essential oil component-based polymer films: a potential approach to reduce bacterial biofilm
2013
The development of new polymeric materials aimed to control the bacterial biofilm appears to be an important practical approach. The goal of the present study was to prepare and characterize poly(ethylene-co-vinyl acetate) copolymer (EVA) films containing citronellol, eugenol, and linalool and evaluate their efficiency on growth and biofilm formation of Listeria monocytogenes, Staphylococcus aureus, Staphylococcus epidermidis, Escherichia coli, and Pseudomonas aeruginosa in monospecies and dual species. The results showed that the addition of oil components influenced the elastic modulus (15 % decrease), the tensile stress (30 % decrease), the elongation at break (10 % increase), and the co…