Search results for "SISTEMI"
showing 10 items of 2026 documents
Computer-Assisted Approaches for Uterine Fibroid Segmentation in MRgFUS Treatments: Quantitative Evaluation and Clinical Feasibility Analysis
2019
Nowadays, uterine fibroids can be treated using Magnetic Resonance guided Focused Ultrasound Surgery (MRgFUS), which is a non-invasive therapy exploiting thermal ablation. In order to measure the Non-Perfused Volume (NPV) for treatment response assessment, the ablated fibroid areas (i.e., Region of Treatment, ROT) are manually contoured by a radiologist. The current operator-dependent methodology could affect the subsequent follow-up phases, due to the lack of result repeatability. In addition, this fully manual procedure is time-consuming, considerably increasing execution times. These critical issues can be addressed only by means of accurate and efficient automated Pattern Recognition ap…
Liberalizing Industrial Relations in Southern-Europe: Towards the End of a Coordinated and Egalitarian Model
2016
The paper focuses on the changes that occurred to the architecture of industrial relations in Southern-European countries during the last decade. In particular, the bargaining systems of Italy, France, Spain, Greece and Portugal are compared, with a particular attention to the legislative measures enacted under the influence of international institutions after the 2008 financial and sovereign debt crisis. The theoretical framework, under which the process of transformation is analysed, is the literature on comparative politics as recently reviewed by Thelen. At the same time, the work takes into account the labour law dogmatic category of "inderogability", represented by the couple law-bran…
An Architecture for Observational Learning
2014
In this thesis I present an architecture that learns new skills through observation and adapts to the environment through situated experience in the world. Such an architectural growth is bootstrapped from a minimal initial knowledge and the architecture itself is built around the biologically-inspired notion of internal models. The key idea, supported by findings in cognitive neuroscience, is that the same internal models used in overt goal-directed action execution can be covertly re-enacted in simulation to observe and understand the actions of others. The system applies these concepts to learning higher order cognitive functions like learning problem solving skills and social interactio…
Imprenditorialità e convergenza tra produzione di pensiero e produzione di cose
2013
Le più qualificate sedi internazionali (ONU, 26 giugno 2013, Thematic Debate on Entrepreneurship for Development) ed europee (Commissione Europea, 9 gennaio 2013, Entrepreneurship 2020 Action Plan) concordano sulla necessità di accrescere il dinamismo imprenditoriale dei territori attraverso incisive e continuative azioni di educazione all’imprenditorialità dei giovani per il contrasto alla disoccupazione giovanile, alla povertà e per stimolare la crescita economica. Su questo tema la nostra regione è in forte ritardo e finora non ha mai avviato alcuna incisiva azione di sistema a supporto della educazione imprenditoriale dei giovani siciliani. Negli anni recenti della nostra storia, mai co…
Densità, complementarietà e qualità imprenditoriali per lo sviluppo locale
2017
Ricordo che da ragazzo provavo meraviglia quando, unendo con una matita i punti distribuiti su una pagina della Settimana Enigmistica, prendevano forma oggetti o animali. Da una distribuzione di punti, apparentemente casuale, man mano che procedevo unendo i punti, potevo intravedere il risultato finale. Il processo però era guidato da un sistema di numerazione e, infatti, a ogni punto era associato un numero. Unendo i punti seguendo la numerazione in ordine crescente, si vedeva emergere una forma che, a poco a poco, ero in grado di riconoscere. In questi anni mi sono reso conto che l’avvio di un’impresa, e anche la costruzione della nostra vita, è un percorso simile, così ci ha anche detto …
Energy efficiency analysis in Incremental Sheet Forming operations
2012
In literature, manufacturing processes have been studied with different approaches, but a lack in terms of their environmental impact and energy required is still present. The aim of this paper is to compute some energy efficiency analysis on a specific manufacturing process. More in detail, the attention will be focused on the Incremental Sheet Forming process in order to evaluate the required energy and how it changes for changing process conditions. Accordingly, a wide experimental investigation has been executed taking into account different process parameters (i.e. tool depth step, punch diameter, wall inclination angle and sheet thickness). The total energy consumption has been monito…
Valutare l'equità dei sistemi scolastici
2006
06038; Denis Meuret spiega le ragioni a sostegno di una misura del grado diquità dei sistemi scolastici e presenta i principi basilari per costruire un insieme d'indicatori dell'equità dell'istruzione e della scuola. Da questi principi è partito il GERESE (Il Gruppo Europeo di Ricerca sulla Equità dei Sistemi Educativi) per comporre l'insieme di 29 indicatori dell'equità. Meuret illustra al termine del suo saggio la structtura e l'organizzazione di questo insieme che è senza dubbio uno dei prodotti recenti più originali della ricerca sulla giustizia educativa
Impact of RES penetration on the frequency dynamics of the 500 kV vietnamese power system
2019
The increase of renewable energy sources (RES) typically operating as converter-interfaced generation (CIG) is progressively causing a significant change of power systems operation paradigm. The reduction of the overall available kinetic energy and the consequent impact on the dynamic response of the system is a relevant issue currently under investigation in academic and industrial scopes. The work analyzes the impact of different CIG penetration in the three areas of the 500 kV Vietnamese power system, North, Center and South. The system is modified substituting conventional synchronous generation with converter-interfaced generation. The models of power converters and corresponding contr…
Inertial response of isolated power networks with wind power plants
2019
The constant increase of power generation provided by renewable energy source (RES) power plants is causing a progressive reduction of the overall inertia of the power systems. Especially in the case of small, isolated power networks, the replacement of conventional generation plants with RES power plants can affect significantly the frequency response of the system. The critical low-inertia conditions can be improved by the introduction of specific additional controls to the RES power converters. These control schemes are known as “synthetic inertia” or “virtual inertia” controls. The paper analyzes the impact of a derivative-based inertial control on a small, isolated power system, with a…
System Stability of a Small Island's Network with Different Levels of Wind Power Penetration
2018
The reduction of the inertial response of the generation system has been one of the main obstacles to the penetration of high sharing of renewable energy sources in islanded systems. This issue can be solved thanks to innovative control that makes wind turbines able to provide the so-named synthetic inertia. The paper investigates some scenarios with different levels of wind power penetration in a small island whose grid is not supplied by the main grid, by the use of the software NEPLAN 360, simulating the wind power plants accordingly to the standard IEC 61400-27. The aim of the paper is to assess the maximum level of penetration in the island of wind generation, with traditional control …