La influencia del examen de selectividad en la enseñanza, (Análisis de una experiencia en Matemáticas de COU)

Mediante el diseño de dos pruebas - prueba objetiva y ensayo- estudiamos, de forma experimental y utilizando patrones estadísticos lineales, la influencia en las notas finales de la asignatura matemáticas en COU, que podría tener la prueba de acceso a la universidad. Los objetivos educativos desempeñan un papel esencial

Robust optimization revisited via robust vector Farkas lemmas

This paper provides characterizations of the weakly minimal elements of vector optimization problems and the global minima of scalar optimization problems posed on locally convex spaces whose objective functions are deterministic while the uncertain constraints are treated under the robust (or risk-averse) approach, i.e. requiring the feasibility of the decisions to be taken for any possible scenario. To get these optimality conditions we provide Farkas-type results characterizing the inclusion of the robust feasible set into the solution set of some system involving the objective function and possibly uncertain parameters. In the particular case of scalar convex optimization problems, we characterize the optimality conditions in terms of the convexity and closedness of an associated set regarding a suitable point.This research was partially supported by MINECO of Spain and FEDER of EU, [grant number MTM2011-29064-C03-02] and by the project [B2015-28-04]: “A new approach to some classes of optimization problems”, Vietnam National University – HCMC, Vietnam

Observaciones sobre el estado trófico de un conjunto de lagunas costeras del arco atlántico-mediterráneo español

Mediterranean coastal lagoons constitute shallow bodies of water, with variable salinity and volume, which can be totally or partially separated from the sea by sandbanks, gravel, or even rocks. Regarding salinity, their waters oscillate between the category of “brackish” and “hypersaline” as a result of a characteristic hydrological regime and water balance. Las lagunas costeras mediterráneas constituyen masas de agua someras, de salinidad y volumen variable, que pueden estar total o parcialmente separadas del mar por bancos de are- na, grava o incluso rocas. Respecto a la salinidad, sus aguas oscilan entre la categoría de “salobres” y la de “hipersalinas” como resultado de un régimen hidrológico y balance de aguas característico

Quantitative Stability of Linear Infinite Inequality Systems under Block Perturbations with Applications to Convex Systems

The original motivation for this paper was to provide an efficient quantitative analysis of convex infinite (or semi-infinite) inequality systems whose decision variables run over general infinite-dimensional (resp. finite-dimensional) Banach spaces and that are indexed by an arbitrary fixed set $J$. Parameter perturbations on the right-hand side of the inequalities are required to be merely bounded, and thus the natural parameter space is $l_{\infty}(J)$. Our basic strategy consists of linearizing the parameterized convex system via splitting convex inequalities into linear ones by using the Fenchel-Legendre conjugate. This approach yields that arbitrary bounded right-hand side perturbations of the convex system turn on constant-by-blocks perturbations in the linearized system. Based on advanced variational analysis, we derive a precise formula for computing the exact Lipschitzian bound of the feasible solution map of block-perturbed linear systems, which involves only the system's data, and then show that this exact bound agrees with the coderivative norm of the aforementioned mapping. In this way we extend to the convex setting the results of [3] developed for arbitrary perturbations with no block structure in the linear framework under the boundedness assumption on the system's coefficients. The latter boundedness assumption is removed in this paper when the decision space is reflexive. The last section provides the aimed application to the convex case

Optimality conditions in convex multiobjective SIP

The purpose of this paper is to characterize the weak efficient solutions, the efficient solutions, and the isolated efficient solutions of a given vector optimization problem with finitely many convex objective functions and infinitely many convex constraints. To do this, we introduce new and already known data qualifications (conditions involving the constraints and/or the objectives) in order to get optimality conditions which are expressed in terms of either Karusk–Kuhn–Tucker multipliers or a new gap function associated with the given problem.This research was partially cosponsored by the Ministry of Economy and Competitiveness (MINECO) of Spain, and by the European Regional Development Fund (ERDF) of the European Commission, Project MTM2014-59179-C2-1-P

Solving variational inequalities defined on a domain with infinitely many linear constraints

We study a variational inequality problem whose domain is defined by infinitely many linear inequalities. A discretization method and an analytic center based inexact cutting plane method are proposed. Under proper assumptions, the convergence results for both methods are given. We also provide numerical examples to illustrate the proposed method

Muerte perinatal: acompañamiento a mujeres y parejas

Objetivo: analizar las intervenciones que llevan a cabo los profesionales para mejorar la atención brindada a las mujeres y a sus parejas ante una pérdida perinatal. Método: es una revisión de la bibliografía internacional publicada en los últimos 10 años sobre intervenciones para mejorar la atención que se brinda a las parejas ante la muerte de un hijo. Resultados: se observa un déficit en la formación de los profesionales sanitarios relacionada con este tema y se identifican nuevas actuaciones cuyo objetivo es mejorar la atención a las parejas. Conclusiones: no podemos concluir que la «creación de recuerdos» mejore los resultados psicosociales, pero sí la información adaptada durante el proceso, y la matrona es la profesional idónea para ello. No obstante, es necesario mejorar la formación y los recursos de los profesionales para poder ofrecer una atención de calidad