Search results for "equality"
showing 10 items of 1338 documents
Optimal passive-damping design using a decentralized velocity-feedback H-infinity approach
2012
In this work, a new strategy to design passive energy dissipation systems for vibration control of large structures is presented. The method is based on the equivalence between passive damping systems and fully decentralized static velocity-feedback controllers. This equivalence allows to take advantage of recent developments in static output-feedback control design to formulate the passive-damping design as a single optimization problem with Linear Matrix Inequality constraints. To illustrate the application of the proposed methodology, a passive damping system is designed for the seismic protection of a five-story building with excellent results. Peer Reviewed
Nonexistence Results for Higher Order Fractional Differential Inequalities with Nonlinearities Involving Caputo Fractional Derivative
2021
Higher order fractional differential equations are important tools to deal with precise models of materials with hereditary and memory effects. Moreover, fractional differential inequalities are useful to establish the properties of solutions of different problems in biomathematics and flow phenomena. In the present work, we are concerned with the nonexistence of global solutions to a higher order fractional differential inequality with a nonlinearity involving Caputo fractional derivative. Namely, using nonlinear capacity estimates, we obtain sufficient conditions for which we have no global solutions. The a priori estimates of the structure of solutions are obtained by a precise analysis …
Gradient estimates for solutions to quasilinear elliptic equations with critical sobolev growth and hardy potential
2015
This note is a continuation of the work \cite{CaoXiangYan2014}. We study the following quasilinear elliptic equations \[ -\Delta_{p}u-\frac{\mu}{|x|^{p}}|u|^{p-2}u=Q(x)|u|^{\frac{Np}{N-p}-2}u,\quad\, x\in\mathbb{R}^{N}, \] where $1<p<N,0\leq\mu<\left((N-p)/p\right)^{p}$ and $Q\in L^{\infty}(\R^{N})$. Optimal asymptotic estimates on the gradient of solutions are obtained both at the origin and at the infinity.
Pobreza laboral en España : causas y alternativas políticas
2017
En el contexto de la crisis actual los trabajadores y trabajadoras pobres son una nueva realidad y las tasas de pobreza en España se encuentran entre las más altas de Europa. Habitualmente la pobreza se relacionada con el desempleo y la jubilación. Pero desde 2007 las características de las personas afectadas han cambiado radicalmente. Colectivos que tradicionalmente se consideraban "protegidos" (personas ocupadas, con nivel educativo alto…) ahora ya no lo están. El fuerte incremento de la pobreza que ha tenido lugar y la generalización del problema a nuevos grupos sociales significan un nuevo desafío para el trabajo decente y la integración social. Desde nuestro punto de vista las causas d…
Irregular Time Dependent Obstacles
2010
Abstract We study the obstacle problem for the Evolutionary p-Laplace Equation when the obstacle is discontinuous and does not have regularity in the time variable. Two quite different procedures yield the same solution.
The 30 Year Search for the Compact Object in SN 1987A
2018
Despite more than 30 years of searches, the compact object in Supernova (SN) 1987A has not yet been detected. We present new limits on the compact object in SN 1987A using millimeter, near-infrared, optical, ultraviolet, and X-ray observations from ALMA, VLT, HST, and Chandra. The limits are approximately 0.1 mJy ($0.1\times 10^{-26}$ erg s$^{-1}$ cm$^{-2}$ Hz$^{-1}$) at 213 GHz, 1 Lsun ($6\times 10^{-29}$ erg s$^{-1}$ cm$^{-2}$ Hz$^{-1}$) in optical if our line-of-sight is free of ejecta dust, and $10^{36}$ erg s$^{-1}$ ($2\times 10^{-30}$ erg s$^{-1}$ cm$^{-2}$ Hz$^{-1}$) in 2-10 keV X-rays. Our X-ray limits are an order of magnitude less constraining than previous limits because we use a…
Roman Women e Public History: la creatività del Web
2018
Partendo dal dibattito sviluppatosi negli USA alla metà degli Anni Settanta sulla condizione femminile nel mondo antico, l’articolo sottolinea che ha contribuito a dare una lettura articolata dell’immagine delle donne romane. Ciò ha inciso non solo sulla storiografia posteriore, bensì oltre, come si ricava da alcuni recenti video YouTube sulle Roman Women, rinvenibili in rete. Essi mostrano la creatività dei loro autori, i loro diversi livelli di conoscenza e capacità tecniche. D’altro lato, proiettano lo spettatore nella vita quotidiana delle donne dell’antica Roma. In tal senso, questo genere di produzione può essere considerato un ottimo esempio di Public History applicata e risultare ef…
Utopie, égalité et liberté : l'impossible idéal
2012
The purpose of this article is to derive the logical but unexpected consequences in terms of social justice, of the presuppositions on utopian constructions. In the conditions generally in effect in urban utopias which lay claim to a certain amount of social justice combining equality, fairness and liberty in different ways, equality is likely to interfere with liberty, even create inequalities, and liberty can adapt to inequalities, perhaps even create losses of liberty. Thus, the illusory perfection of Utopia is exposed. Analysis of the mechanisms and operating conditions of urban utopias, which have appeared recurringly especially since the Renaissance, makes it possible to show how the …
French Education's Dilemma in the Globalisation Process: How to accommodate simultaneously the objectives of Equality and Excellence?
2006
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Dénonciation, régulation et réforme du droit de la famille par les groupes de pères séparés : ce que nous apprend la comparaison France-Québec
2016
The recent mobilization of estranged fathers in France is the expression of a cause that emerged in the 1970s, following the feminist mobilizations of that time. InEurope, as in North America, these groups denounced a family justice that seemingly favours women by awarding them custody of the children and by relegatingfathers to provider status, in terms of child-support payments. While these fathers hold egalitarian claims in promoting the sharing of a child’s education after the parents’ separation, their actions and discourses effectively support the traditional family unit by denouncing the ‘‘catastrophic’’ consequences of divorce on children. In light of a France-Que´bec comparison, we…