Search results for "WTO"
showing 10 items of 163 documents
Trace Operators on Regular Trees
2020
Abstract We consider different notions of boundary traces for functions in Sobolev spaces defined on regular trees and show that the almost everywhere existence of these traces is independent of the chosen definition of a trace.
Backward solution of PV nodes in radial distribution networks
2009
In this paper an iterative backward methodology to solve radial distribution networks with fixed voltage (PV) nodes and with constant power loads or mixed loads (with at least one component with constant power) is proposed. The method developed, although deriving conceptually from the backward/forward (b/f) methodology, presents only the backward phase in which all the network variables are evaluated. In themethods developed up until nowfor the solution of such systems, PV nodes are taken into account at the end of each iteration by evaluating, based on the known quantities of the network, the unknowns associated with PV nodes. In the methodology developed here the unknowns relevant to PV n…
Newton's Law of Universal Gravitation and Hume's Conception of Causality
2013
This article investigates the relationship between Hume’s causal philosophy and Newton’s philosophy of nature. I claim that Newton’s experimentalist methodology in gravity research is an important background for understanding Hume’s conception of causality: Hume sees the relation of cause and effect as not being founded on a priori reasoning, similar to the way that Newton criticized non-empirical hypotheses about the properties of gravity. However, according to Hume’s criteria of causal inference, the law of universal gravitation is not a complete causal law, since it does not include a reference either to contiguity or to temporal priority. It is still argued that because of the empirical…
A class of quasi-Newton generalized Steffensen methods on Banach spaces
2002
AbstractWe consider a class of generalized Steffensen iterations procedure for solving nonlinear equations on Banach spaces without any derivative. We establish the convergence under the Kantarovich–Ostrowski's conditions. The majorizing sequence will be a Newton's type sequence, thus the convergence can have better properties. Finally, a numerical comparation with the classical methods is presented.
Generación de fractales a partir del método de Newton
2013
[EN] A large number of fractals known, as Julia fractals and Mandelbrot, can be generated from an iterative method. In this paper we present a virtual laboratory developed as a Graphical User Interface (GUI) of Matlab that allows us to study and visualize in real time the relationship between Newton iterative methods of two variables and the generation of fractals. The main objective is to allow Technical School students in Numerical Computation subjects to acquire the skills to generate fractals and interpret their plots in terms of the convergence or divergence speed of the sequence of iterated.
Una procedura generale per la valutazione delle tensioni residue con il metodo del foro
2009
Il metodo della rosetta forata è una delle più note tecniche semidistruttive di analisi delle tensioni residue su componenti meccanici. In presenza di tensioni non uniformi, il campo delle tensioni può essere determinato a partire dalle deformazioni rilassate utilizzando varie procedure di calcolo basate sulla stessa equazione, chiamata equazione integrale. In questo lavoro viene presentata una nuova procedura di calcolo basata sul metodo di Newton-Raphson per la determinazione degli zeri di una funzione. La tecnica proposta presenta due importanti vantaggi rispetto alle altre tecniche: 1) è basata su una teoria piuttosto generale che permette di ottenere le principali tecniche esistenti co…
Channel estimation and transmit power control in wireless body area networks
2015
Wireless body area networks have recently received much attention because of their application to assisted living and remote patient monitoring. For these applications, energy minimisation is a critical issue since, in many cases, batteries cannot be easily replaced or recharged. Reducing energy expenditure by avoiding unnecessary high transmission power and minimising frame retransmissions is therefore crucial. In this study, a transmit power control scheme suitable for IEEE 802.15.6 networks operating in beacon mode with superframe boundaries is proposed. The transmission power is modulated, frame-by-frame, according to a run-time estimation of the channel conditions. Power measurements u…
I diritti dei lavoratori nella globalizzazione. Che prezzo (se lo conosciamo) siamo disposti a pagare?
2015
L’articolo ha come obiettivo dimostrare l’inefficacia del diritto del lavoro in tempi di globalizzazione nel tutelare il lavoratore, quale contraente debole del rapporto di lavoro. Dopo una breve disamina del contesto storico-politico della globalizzazione, che ha portato ad un diritto del lavoro sempre più privatizzato, si insiste nell’assenza di una forma di protezione universale per i lavoratori dal punto di vista del diritto internazionale pubblico nei sistemi OIL-WTO-carte Onu; si individua infine come unica tutela transnazionale, e comunque orientata in senso favorevole al mercato, la giurisprudenza della Corte di Giustizia alla luce delle disposizioni della Carta europea dei diritti …
Intersezioni. Percorsi attraverso i saperi. Scienza ed etica
2012
"Intersezioni. Percorsi attraverso i saperi" sono dei percorsi interdisciplinari inseriti nel "Nuovo manuale di letteratura" di Luperini, Cataldi, Marchiani, Marchese, che vengono introdotti per potenziare il lavoro di preparazione in vista dell'esame di Stato della Scuola Secondaria di 2° grado. Tali percorsi intrecciano testi letterari e non letterari (compresi documenti iconografici e fotografici) e forniscono dei laboratori di scrittura per la produzione del saggio breve, del tema storico o di ordine generale. In particolare, questo percorso è dedicato al rapporto fra scienza, filosofia e morale nel periodo compreso fra la Rivoluzione copernicana (e la nascita della scienza moderna nel …
Axisymmetric simulations of magnetorotational core collapse: approximate inclusion of general relativistic effects
2006
We continue our investigations of the magnetorotational collapse of stellar cores discussing simulations performed with a modified Newtonian gravitational potential that mimics general relativistic effects. The approximate TOV potential used in our simulations catches several features of fully relativistic simulations quite well. It is able to correctly reproduce the behavior of models which show a qualitative change both of the dynamics and the gravitational wave signal when switching from Newtonian to fully relativistic simulations. If this is not the case, the Newtonian and the approximate TOV models differ quantitatively. The collapse proceeds to higher densities with the approximate TO…