Search results for " equilibrium."

Elimination of spurious kinematic modes in hybrid equilibrium elements

2011

Hybrid stress elements are proposed as alternative to standard finite elements for linear and non linear analysis. Hybrid stress formulation is developed in a rigorous mathematical setting and an original approach for elimination of spurious kinematic modes is presented. Hybrid equilibrium method is compared to classical displacement based method by linear elastic analysis of some well known structural examples.

Hybrid equilibrium elements for accurate stress analysis

2010

It is widely recognized that displacement elements produce poor stress fields, which do not satisfy strong equilibrium conditions. In several fields of computational mechanics, such as cohesive crack propagation and cohesive delamination, stress fields drive all the nonlinear phenomena and very fine meshes have to be employed in order to avoid numerical instabilities. In fact, inter-element equilibrium condition is generally not satisfied and stress fields can abruptly change between adjacent elements, producing strong inconvenient in crack propagation analysis. In the present paper hybrid stress elements are proposed as alternative to standard finite element for linear and non linear analy…

Etica della popolazione. Paradossi, intuizioni e metodo

2020

This paper is an introduction to the contemporary debate on population ethics. As it is shown at the beginning, the paradoxes of population ethics do not pose a problem just for Utilitarianism, but also for everyone who shares a set of very common intuitions. Different proposals for a solution are described, each of which proves ineffective. At the end of the paper two different methods of moral reasoning are distinguished depending on whether accepting counter-intuitive conclusions is allowed or not.

Rivoluzione morale. Struttura, limiti e risorse nascoste del progetto filosofico di Joshua Greene

2020

This article analyzes Joshua Greene’s defense of a consequentialist approach to ethics, through a series of debunking arguments targeting characteristically deontological judgments and common-sense intuitions. This project is not new in ethics, but Greene develops his predecessors’ speculations by means of the recent findings in moral psychology. Greene’s conclusion is a moral revolution about the conception of harm and the duties to help strangers. The article focuses also on Frances Kamm and Guy Kahane’s critique to Greene’s theses and method. Kahane’s critique is used to give a subjectivist interpretation of Greene’s account which may constitute an unexplored answer to some methodologica…

Etica della popolazione. Sul ruolo delle intuizioni morali

2019

In questa tesi vengono analizzati i principali argomenti per risolvere i paradossi dell'etica della popolazione (dibattito di etica normativa). Gli argomenti vengono suddivisi in due stili rispondenti a regole diverse. Segue un'analisi sul piano metodologico dei due stili morali, presentati come due modi di intendere la ricerca rawlsiana di un equilibrio riflessivo. Dopo aver messo a fuoco le differenze principali tra questi due stili viene avanzata la tesi secondo la quale uno di essi sia il metodo di indagine normativa proprio del Soggettivismo (tesi per cui le ragioni che abbiamo per agire dipendono dalle nostre proattitudini teliche). In this work the main arguments that have been put f…

A Global Perspective on Effectiveness of Aid for Trade

2012

Recent global initiatives on debt relief and development assistance call for increasing aid for trade to the poorest countries. The paper applies a multi-country computable general equilibrium model to measure the effectiveness of alternative aid for trade categories. The findings show that aid for trade policies expand trade and alleviate international income inequalities in the recipient countries, that will benefit mainly from aid for trade adjustment and technical assistance.

MACROECONOMI EFFECTS OF PUBLIC HEALTH EXPENDITURE IN THE UNITED STATES

2009

Liberalizing Immigration Policies for the UK Agricultural Sector in the Post-Brexit Era

2022

We investigate the effects of immigration policies on the UK agricultural sector under the new post-Brexit deal through a computable general equilibrium framework. We consider bilateral flows of migrants and frictions as part of capital and labor mobility to compare the point-based immigration system to open immigration policies in terms of their impacts on agriculture. We also integrate the GTAP-GMig2 immigration model with the GTAP-AGR agriculture model. Our findings show that liberal immigration policies have positive effects on production, farmers’ income, and overall welfare. The benefits increase if these policies are combined with reduced bureaucracy and lower behind-the-border costs…

Public infrastructure investment and taxation: the case of transport policy in the European Union

2009

THE CAROUSEL VALUE-ADDED TAX FRAUD IN THE EUROPEAN EMISSION TRADING SYSTEM

2012

n this article, we analyse the effects of the carousel value-added tax fraud in the European carbon market and the legislative measures that the EU Member States could adopt to deal with this phenomena. We use a computable general equilibrium model, called GTAP-E and the version 6 of the GTAP database to evaluate the economy-wide and terms of trade effects. The policy test has been designed for five European countries: Belgium, France, Germany, Italy, Netherlands and the United Kingdom. According to our findings, the legislative measures aimed to remove the VAT fraud in the European Emission Trading System will have positive effects in terms of GDP and welfare in the selected EU Member Stat…