Browsing EIOArtigos by Title
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On the Volterra property of a boundary problem with integral gluing condition for a mixed parabolichyperbolic equation
(Springer, 2013)In the present work, we consider a boundary value problem with gluing conditions of an integral form for the parabolichyperbolic type equation. We prove that the considered problem has the Volterra property. The main tools ... 
One Year of the COVID19 Pandemic in Galicia: A Global View of AgeGroup Statistics during Three Waves
(MDPI, 2021)In this work we look at the past in order to analyze four key variables after one year of the COVID19 pandemic in Galicia (NW Spain): new infected, hospital admissions, intensive care unit admissions and deceased. The ... 
Optimal control of the COVID19 pandemic: controlled sanitary deconfinement in Portugal
(Springer Nature, 2021)The COVID19 pandemic has forced policy makers to decree urgent confinements to stop a rapid and massive contagion. However, after that stage, societies are being forced to find an equilibrium between the need to reduce ... 
OptimalCutpoints: An R Package for Selecting Optimal Cutpoints in Diagnostic Tests
(American Statistical Association, 2014)Continuous diagnostic tests are often used for discriminating between healthy and diseased populations. For the clinical application of such tests, it is useful to select a cutpoint or discrimination value c that defines ... 
Optimization method for identifying the source term in an inverse wave equation
(Texas State University, 2017)In this work, we investigate the inverse problem of identifying a spacewise dependent source term of wave equation from the measurement on the boundary. On the basis of the optimal control framework, the inverse problem ... 
Optimum sample size to estimate mean parasite abundance in fish parasite surveys
(Sciendo, 20180127)To reach ethically and scientifi cally valid mean abundance values in parasitological and epidemiological studies this paper considers analytic and simulation approaches for sample size determination. The sample size ... 
Orthogonal Decomposition of the Genetic Variance for Epistatic Traits Under Linkage Disequilibrium—Applications to the Analysis of BatesonDobzhanskyMüller Incompatibilities and Sign Epistasis
(Frontiers Media, 20190305)The onecenturyold theory of orthogonal genetic variance decomposition originated the field of quantitative genetics and has kept on being improved ever since. Recently, serious concerns about the possibility of attaining ... 
Parametric Estimation of Diffusion Processes: A Review and Comparative Study
(MDPI, 2021)This paper provides an indepth review about parametric estimation methods for stationary stochastic differential equations (SDEs) driven by Wiener noise with discrete time observations. The shortterm interest rate dynamics ... 
Periodic solutions for some phiLaplacian and reflection equations
(Springer International Publishing, 20160229)This work is devoted to the study of the existence and periodicity of solutions of initial differential problems, paying special attention to the explicit computation of the period. These problems are also connected with ... 
Permanence and Periodic Solution of PredatorPrey System with Holling Type Functional Response and Impulses
(Hindawi, 2007)We considered a nonautonomous two dimensional predatorprey system with impulsive effect. Conditions for the permanence of the system and for the existence of a unique stable periodic solution are obtained. 
A perspectiva de xénero na planificación da actividade estatística na Comunidade Autónoma de Galicia
(Universidade de Santiago de Compostela, 2010)O propósito deste artigo é referir o estado da cuestión polo que respecta á integración da perspectiva de xénero nas estatísticas oficiais na Comunidade galega a través da revisión da planificación estatística. Este ... 
A plugin bandwidth selector for nonparametric quantile regression
(Springer, 2018)In the framework of quantile regression, local linear smoothing techniques have been studied by several authors, particularly by Yu and Jones (J Am Stat Assoc 93:228–237, 1998). The problem of bandwidth selection was ... 
Polynomial volume estimation and its applications
(Elsevier, 2018)Given a compact set S ⊂ R d we consider the problem of estimating, from a random sample of points, the Lebesgue measure of S, µ(S), and its boundary measure, L(S) (as defined by the Minkowski content of ∂S). This topic ... 
A positive fixed point theorem with applications to systems of Hammerstein integral equations
(Springer, 2014)We present new criteria on the existence of fixed points that combine some monotonicity assumptions with the classical fixed point index theory. As an illustrative application, we use our theoretical results to prove the ... 
Positive periodic solutions for impulsive differential equations with infinite delay and applications to integro‐differential equations
(Wiley, 2020)Sufficient conditions for the existence of at least one positive periodic solution are established for a family of scalar periodic differential equations with infinite delay and nonlinear impulses. Our criteria, obtained ... 
Positive solutions for discontinuous systems via a multivalued vector version of Krasnosel’skiĭ’s fixed point theorem in cones
(MDPI, 2019)We establish the existence of positive solutions for systems of second–order differential equations with discontinuous nonlinear terms. To this aim, we give a multivalued vector version of Krasnosel’ski˘ı’s fixed point ... 
Positive solutions for secondorder boundaryvalue problems with sign changing Green's functions
(Texas State University, 2017)In this article we analyze some possibilities of finding positive solutions for secondorder boundaryvalue problems with the Dirichlet and periodic boundary conditions, for which the corresponding Green's functions change ... 
Positive solutions for φLaplacian equations with discontinuous statedependent forcing terms
(Vilnius University Press, 2019)This paper concerns the existence, localization and multiplicity of positive solutions for a Laplacian problem with a perturbed term that may have discontinuities in the state variable. First, the initial discontinuous ... 
Postoperative stress hyperglycemia is a predictor of mortality in liver transplantation
(BMC, 2018)A significant association is known between increased glycaemic variability and mortality in critical patients. To ascertain whether glycaemic profiles during the first week after liver transplantation might be associated ... 
Powerseries solution of compartmental epidemiological models
(AIMS Press, 2021)In this work, powerseries solutions of compartmental epidemiological models are used to provide alternate methods to solve the corresponding systems of nonlinear differential equations. A simple and classical SIR compartmental ...