Search results for " Analisi"
showing 10 items of 1252 documents
Dependence of effective properties upon regular perturbations
2022
In this survey, we present some results on the behavior of effective properties in presence of perturbations of the geometric and physical parameters. We first consider the case of a Newtonian fluid flowing at low Reynolds numbers around a periodic array of cylinders. We show the results of [43], where it is proven that the average longitudinal flow depends real analytically upon perturbations of the periodicity structure and the cross section of the cylinders. Next, we turn to the effective conductivity of a periodic two-phase composite with ideal contact at the interface. The composite is obtained by introducing a periodic set of inclusions into an infinite homogeneous matrix made of a di…
I piani nazionali di ripresa e resilienza in prospettiva comparata
2021
L’articolo propone un’analisi dei piani di ripresa e resilienza di Francia, Germania, Italia, Spagna, Grecia e Portogallo. Per ogni caso di studio si prendono in considerazione vari elementi. Innanzitutto, è oggetto di disamina il contesto economico nel quale è calato il singolo piano, con un approfondimento sull’impatto della pandemia sulle finanze di ciascun Paese. Successivamente, si dà conto delle dimensioni e delle caratteristiche del piano. In particolare, si esaminano la portata finanziaria complessiva del piano, i settori in cui sono concentrate le risorse, la ripartizione dei finanziamenti previsti tra sovvenzioni e prestiti. Si ricostruisce, inoltre, il modello di governance di og…
Urbacost: verso un riequilibrio territoriale tra costa ed aree interne nella Sicilia centrale
2009
il contributo mette in evidenza l'importanza del riequilibrio del rapporto di centralità urbana e territoriale tra la pianificazione delle aree interne e quelle costiere nel quadro della cooperazione tra le isttuzioni e le forze imprenditoriali agenti in territori deboli.
Ecocompositi MaterBi (R)/Farina di legno: ottimizzazione delle proprietà attraverso analisi statistica
2009
Two positive solutions for a nonlinear parameter-depending algebraic system
2021
The existence of two positive solutions for a nonlinear parameter-depending algebraic system is investigated. The main tools are a finite dimensional version of a two critical point theorem and a recent weak-strong discrete maximum principle.
Two positive solutions for a nonlinear parameter-depending algebraic system
2021
The existence of two positive solutions for a nonlinear parameter-depending algebraic system is investigated. The main tools are a finite dimensional version of a two critical point theorem and a recent weak-strong discrete maximum principle.
Normalized Solutions to the Fractional Schrödinger Equation with Potential
2023
AbstractThis paper is concerned with the existence of normalized solutions to a class of Schrödinger equations driven by a fractional operator with a parametric potential term. We obtain minimization of energy functional associated with that equations assuming basic conditions for the potential. Our work offers a partial extension of previous results to the non-local case.
Processi Innovativi e Orientamenti Strategici nelle PMI siciliane. Un'analisi multidimensionale
2010
In 1959, Penrose highlighted how the firm's organisation of economic activity is based on its perception about the adjustment of production to the market, more than on objective evaluation. So, he underlined not just the importance to identify the nature of the determinants of firm behaviour, but also how the assessment of these factors must consider the production context where they originate. Now, this context for Penrose has to be considered as an image in the mind of the entrepreneur of the possibilities and restrictions. In line with this view, and with the recent approach to innovation policies, this work analyses the survey data collected in 2008 on the innovation needs of Sicilian f…
L'altruismo tra scienze sociali e vita quotidiana
2011
MR3535311 Reviewed Inoue, H.(J-KYUSGM); Takakura, M.(J-FUE-AM) Regular biorthogonal pairs and pseudo-bosonic operators. (English summary) J. Math. Ph…
2017
Given a pair of operators a and b acting on a Hilbert space H, such that [a,b]=1, the authors give a method to construct a regular bi-orthogonal pair of sequences in H. They study the relationship between the conditions on a,b,a†,b† and the operators Ae,Be,A†e,B†e, considered by one of the authors in a previous paper, in the set-up of a general theory of bi-orthogonal pair sequences. Then they give a method to construct operators A and B with the so-called D-pseudo bosons conditions, i.e. the commutation rule and some assumptions, on a dense subspace D of H, considered in the literature. Finally, some physical examples are given.