Search results for " SCIENZA"

A route to agnosticism in mathematics

Dynamic shakedown design of structures under repeated seismic loads

2013

The paper is devoted to the formulation of an optimal design (minimum volume) problem of elastic perfectly plastic structures subjected to suitable combinations of static (fixed) and dynamic (seismic) loads. The structure is constrained to simultaneously respect two different safety criteria; actually, it must exhibit an elastic shakedown behaviour for the combination of loads characterizing the serviceability conditions and it must prevent the instantaneous collapse for the highest expected load condition (combination of loads characterized by the presence of fixed loads and maximum expected intensity of seismic action). The shakedown limit behaviour for the optimal structure will be impos…

Comparison between unrestricted dynamic shakedown design and a new probabilistic approach for structures under seismic loadings

2014

The paper concerns a study related to the comparison between two different approaches utilized for the formulation of an optimal shakedown design problem for elastic plastic frame structures subjected to a combination of fixed and seismic loading. The first formulation utilizes the unrestricted dynamic shakedown theory, while the second one is based on a new probabilistic approach. The comparison is effected in terms of mathematical formulations, in terms of adopted loading models and in terms of numerical results. The performed applications are related to plane steel frames.

AN EMPIRICAL ANALYSIS OF THE PUBLIC SPENDING DECOMPOSITION ON ORGANIZED CRIME

2016

The aim of this paper is to investigate, empirically, what components of the public spending imply a decreasing effect on the organized crime and what components create opportunities for the organized crime, discussing also the role of government effciency. The findings show a strikingly consistent pattern. Organized crime mainly operates in the distribution of the public spending for health, housing and community amenities. There is a decreasing effect on organized crime of the public expenditure devoted to education and to create morality values, such as the expenditure for recreation, culture and religion. Finally, government efficiency in public spending is beneficial for reducing the o…

Multi-objective parameter identification via ACOR algorithm

2009

The spreading of advanced constituive models, needed to model complex phenomena, makes necessary to solve difficult parameter identification problems. The need of multiple tests to fully characterize the experimental behaviour makes the parameter identification problem a multi objective one. Unlike conventional techniques, based on the formulation of an aggregate scalar ob- jective function, in the present work the problem is addressed using a new multi objective algorithm obtained extending the continuous Ant Colony Optimization algorithm. Mathematical tests and ap- plication to a real world problem are performed and different performance measures are used to asses the performance of the a…

Mostri e prodigi. La Sicilia e il meraviglioso

2019

Questo volume intende analizzare un singolo aspetto della sfera del prodigioso, relativo ai parti mostruosi. Come furono interpretati, quali le persistenze e le trasformazioni nei quadri culturali di riferimento? E perché la Sicilia? Ciò su cui il libro prova a interrogarsi pertiene a un ben preciso ambito: quanto la cultura medico-scientifica dell’isola, ma anche quella ermetica e magica, abbiano contribuito in età moderna al più ampio sviluppo del discorso sui mostri

Melt Processed PCL/PEG Scaffold with Discrete Pore Size Gradient for Selective Cellular Infiltration

2016

In order to develop scaffold able to mimic the natural gradient properties of tissues, biphasic and triphasic approaches were adopted. In this work, polycaprolactone/polyethylene glycol (PCL/PEG) scaffolds were prepared by using a combination of melt mixing and selective leaching without harmful solvents. The method permitted to develop three-layer scaffolds with high control of porosity and pore size. The mechanical properties were evaluated under physiological condition in order to simulate the real conditions of work. Co-culture of osteoblastic and fibroblastic mice cells were carried out in order to study the differential cellular permeation through the different pore size layers.

Design Of TLCD under random loads: a new formulation

2012

Computational Fluid Dynamics (CFD) and Finite Element Analysis (FEM) of a Customized Stent-Graft for Endovascular (EVAR) Treatment of Abdominal Aorti…

2023

Background: The treatment of abdominal aortic aneurysm (AAA) is today commonly treated by inserting a stent-graft by the endovascular route, without resorting to open surgery. However, some clinical cases do not allow this less invasive approach, meaning that the stent-graft cannot be inserted and open surgery is used. Methods: In the study, we propose a fluid–structure interaction (FSI) analysis of an aneurysmatic aorta that could not be treated with Endovascular Aneurysm Repair (EVAR). The vessel is reconstructed through segmentation from CT scans and subsequently modeled on CAD software to create the surface and thickness of the vessel itself. Subsequently, we proceeded to carry out Comp…

Fenomenologia della percezione. Modelli, mereologia, sperimentazione.

2012

La ricerca sulla percezione è oggetto di scienze e teorie filosofiche con metodi e impegni concettuali diversi. In questo saggio si tenta di ricostruire i caratteri condivisi dalle teorie concettuali e sperimentali della fenomenologia della percezione. Si sostiene che dai concetti e dalle scoperte dell’analisi e della sperimentazione fenomenologica sia possibile costruire modelli di funzioni percettive ben definite. Si presentano evidenze storiografiche e argomenti a sostegno della tesi che tali modelli contribuiscono alla ricerca sulla percezione condotta da altre scienze con diversi metodi, tecniche e costrutti. The research into perception is carried out by sciences and philosophical the…