Search results for "Operator"

The existence of solutions for the modified (p(x), q(x))-Kirchhoff equation

2022

We consider the Dirichlet problem-Delta(Kp)(p(x))u(x) - Delta(Kq)(q(x))u(x) = f(x, u(x), del u(x)) in Omega, u vertical bar(partial derivative Omega) = 0,driven by the sum of a p(x)-Laplacian operator and of a q(x)-Laplacian operator, both of them weighted by indefinite (sign-changing) Kirchhoff type terms. We establish the existence of weak solution and strong generalized solution, using topological tools (properties of Galerkin basis and of Nemitsky map). In the particular case of a positive Kirchhoff term, we obtain the existence of weak solution (= strong generalized solution), using the properties of pseudomonotone operators.

Le cause di esclusione di cui all’art. 80 D.Lgs. n. 50/2016 tra Linee guida dell’ANAC e principi di tassatività e legalità

2017

This paper, concerning the Guidelines adopted by the ANAC on the subject of "Indication adequate means of proof and deficiencies in the performance of a previous procurement contract which may be considered significant for demonstrating the circumstances of exclusion pursuant to art. 80 paragraph 5, lett. c) of the code”, aims to highlight on the one hand how, the alleged optional nature of the same, recognizing to the individual contracting stations the right to decide on the applicability of the Lines themselves, could, on the one hand, lead to situations potentially harmful to the constitutional principles pursuant to articles 3, 41 and 117, paragraph 2, lett. e) of the Constitution, to …

Automated Checking of Flexible Mathematical Reasoning in the Case of Systems of (In)Equations and the Absolute Value Operator

2021

We present an approach and a tool for automatically providing feedback on solutions that involve complicated reasoning patterns. Currently the tool supports linear systems of equations and inequations that may also contain the absolute value operator and a restricted form of rational functions. This suffices for designing problems that are laborious to solve with standard mechanical procedures, but much easier using short-cuts that students may find by creative thinking. Earlier research has found that struggling with important mathematics promotes conceptual development. Our goal is to encourage students to such struggling. A crucial feature is to give them great freedom to choose the path…

Resolvent estimates for elliptic quadratic differential operators

2011

Sharp resolvent bounds for non-selfadjoint semiclassical elliptic quadratic differential operators are established, in the interior of the range of the associated quadratic symbol.

IMPLEMENTATION OF A QUALITY MANAGEMENT SYSTEM IN A TRAVEL AGENCY

2014

The present research refers to the major problems existing in the Romanian tourism, namely, "manufacturing" and commercialization of certain products non-compliant with the user’s requirements in terms of quality. In tourism and hospitality industry, quality can be judged on the extent to which the service received meets the customer’s expectations. So, the quality is important for both customers and managers of various travel agencies, as it can contribute to making better products at lower costs. Based on theoretical approaches on quality management of tourist services, this paper aims to analyze the activity of the largest travel agency in Romania - Happy Tour and assess the possibilitie…

Seguridad del paciente en Radioterapia Intraoperatoria: impacto de los elementos controlados por el Radiofísico

2015

Introducción: en la administración de la radioterapia intervienen profesionales y equipos de tratamiento, por lo que existe el riesgo de error y se precisa que dicho equipamiento funcione conforme a lo esperado. A los radiofísicos les corresponde participar en las actividades de garantía o aseguramiento de la calidad, incluyendo el control de calidad de los equipos, y en la evaluación de los riesgos asociados. La radioterapia intraoperatoria (RIO) es una técnica radioterápica de intensificación de dosis, altamente selectiva, dirigida a volúmenes anatómicos restringidos durante el tratamiento quirúrgico oncológico, basada en la administración de una dosis absorbida alta por medio de un haz d…

Indagine conoscitiva sui requisiti organizzativi-strutturali dei complessi operatori svolta presso l'AOUP "Paolo Giaccone" di Palermo

2007

In tema di responsabilità medico-chirurgica e postoperatoria per omicidio colposo, nota alle sentenze della Cassazione, 8 febbraio 2005 e 1° dicembre…

2006

Il lavoro sociale nei servizi dell’accoglienza a rifugiati e richiedenti asilo in Italia

2022

Mediante una rassegna sintetica di studi e ricerche, il capitolo propone spunti per l’analisi di un particolare aspetto del sistema italiano di prima e seconda accoglienza di rifugiati e richiedenti asilo: gli operatori e le operatrici dei servizi. Gli studi sulla violenza di prossimità subita da migranti, principalmente di genere femminile, in transito nei centri per rifugiati e richiedenti asilo e sulla presa in carico da parte dei servizi sociosanitari segnalano criticità: alcune di esse concernono aspetti strutturali del sistema di accoglienza (normativa di riferimento), altre ineriscono ai criteri discrezionali propri dei centri. La carenza sia di figure competenti sia di uniformità e …

The NUMEN project @ LNS: Status and perspectives

2017

The NUMEN project aims at accessing experimentally driven information on Nuclear Matrix Elements (NME) involved in the half-life of the neutrinoless double beta decay (0νββ), by high-accuracy measurements of Heavy Ion (HI) induced Double Charge Exchange (DCE) reaction cross sections. In particular, the (18O,18Ne) and (20Ne,20O) reactions are used as tools for β+β+ and β−β− decays, respectively. In the experiments, performed at INFN - Laboratory Nazionali del Sud (LNS) in Catania, the beams are accelerated by the Superconducting Cyclotron (CS) and the reaction ejectiles are detected the MAGNEX magnetic spectrometer. The measured cross sections are challengingly low (a few nb), being the tota…