Ángel Ramos
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View article: Identifiability and observability of some epidemiological systems: SIR vs. SIRS
Identifiability and observability of some epidemiological systems: SIR vs. SIRS Open
International audience
View article: Identifiability and Observability Analysis for Epidemiological Models: Insights on the SIRS Model
Identifiability and Observability Analysis for Epidemiological Models: Insights on the SIRS Model Open
The problems of observability and identifiability have been of great interest as previous steps to estimating parameters and initial conditions of dynamical systems to which some known data (observations) are associated. While most works f…
View article: On the convergence of RaBVIt-G: an algorithm for solving a class of infinite-horizon stochastic feedback Nash differential games
On the convergence of RaBVIt-G: an algorithm for solving a class of infinite-horizon stochastic feedback Nash differential games Open
This paper presents a detailed examination of the convergence properties of algorithms used for approximating feedback Nash equilibria in nonlinear dynamic games. Specifically, we extend the Value Iteration for Games (VIt-G) algorithm by i…
View article: About identifiability and observability for a class of dynamical systems
About identifiability and observability for a class of dynamical systems Open
In this note, we propose a novel approach for a class of autonomous dynamical systems that allows, given some observations of the solutions, to identify its parameters and reconstruct the state vector. This approach relies on proving the l…
View article: Challenges, Aspirations, and Growth Initiatives of Undergraduate Employees in a Government Agency: Basis for Recommendations for Human Empowerment
Challenges, Aspirations, and Growth Initiatives of Undergraduate Employees in a Government Agency: Basis for Recommendations for Human Empowerment Open
This research examines the challenges and career aspirations among undergraduate employees at MSWDO in the Local Government Unit (LGU) of the Municipality of Sta. Rosa Nueva Ecija. Through a comprehensive analysis, the study investigates t…
View article: Nash Equilibria Strategies and Equivalent Single-Objective Optimization Problems. The Case of Linear Partial Differential Equations
Nash Equilibria Strategies and Equivalent Single-Objective Optimization Problems. The Case of Linear Partial Differential Equations Open
In this paper we study the existence and uniqueness of Nash equilibria (solution to competition-wise problems, with several controls trying to reach possibly different goals) associated to linear partial differential equations and show tha…
View article: A multi-objective approach to identify parameters of compartmental epidemiological models—Application to Ebola Virus Disease epidemics
A multi-objective approach to identify parameters of compartmental epidemiological models—Application to Ebola Virus Disease epidemics Open
In this work, we propose a novel methodology to identify parameters of compartmental epidemiological models. It is based on solving a multi-objective optimization problem that consists in fitting some of the model outputs to real observati…
View article: Thermal uncertainty analysis of a single particle model for a Lithium-Ion cell
Thermal uncertainty analysis of a single particle model for a Lithium-Ion cell Open
In recent years, the sustained increase in the worldwide demand for lithium batteries goes side by side with the need for reliable methods to assess battery performance. Of particular importance is assessing Lithium-Ion cell’s thermal beha…
View article: Erratum to: The vestibular implant: Opinion statement on implantation criteria for research
Erratum to: The vestibular implant: Opinion statement on implantation criteria for research Open
On page 215, under section 3, "VI-implantation criteria", where it reads:Reduced horizontal angular VOR gain ≤ 0.1 upon sinusoidal stimulation on a rotatory chair (0.1 Hz, Vmax = 50 • /sec) and a phase lead > 68 • (time constant < 5 sec) S…
View article: Modelling the COVID-19 pandemic: variants and vaccines
Modelling the COVID-19 pandemic: variants and vaccines Open
In December 2019, a new coronavirus, the SARS-CoV-2, was detected in the Chinese city of Wuhan. Since then, many mathematical models have been developed to study the possible evolution of the COVID-19 disease and shed some light on the dif…
View article: A compositional Eulerian approach for modeling oil spills in the sea
A compositional Eulerian approach for modeling oil spills in the sea Open
We present a Compositional Eulerian model to forecast the evolution of oil spills in the sea. The model allows studying the fate of not only the oil concentration but also of each component (e.g., volatile, non-volatile, water in the oil).…
View article: Large‐scale study on virological and serological prevalence of SARS‐CoV‐2 in cats and dogs in Spain
Large‐scale study on virological and serological prevalence of SARS‐CoV‐2 in cats and dogs in Spain Open
The disease produced by the severe acute respiratory syndrome‐related coronavirus 2 (SARS‐CoV‐2) is currently one of the primary concerns worldwide. Knowing the zoonotic origin of the disease and that several animal species, including dogs…
View article: Charge transport modelling of Lithium-ion batteries
Charge transport modelling of Lithium-ion batteries Open
This paper presents the current state of mathematical modelling of the electrochemical behaviour of lithium-ion batteries (LIBs) as they are charged and discharged. It reviews the models developed by Newman and co-workers, both in the case…
View article: Modeling the impact of SARS-CoV-2 variants and vaccines on the spread of COVID-19
Modeling the impact of SARS-CoV-2 variants and vaccines on the spread of COVID-19 Open
The continuous mutation of SARS-CoV-2 opens the possibility of the appearance of new variants of the virus with important differences in its spreading characteristics, mortality rates, etc. On 14 December 2020, the United Kingdom reported …
View article: A new formulation of compartmental epidemic modelling for arbitrary distributions of incubation and removal times
A new formulation of compartmental epidemic modelling for arbitrary distributions of incubation and removal times Open
The paradigm for compartment models in epidemiology assumes exponentially distributed incubation and removal times, which is not realistic in actual populations. Commonly used variations with multiple exponentially distributed variables ar…
View article: An optimal control model to design strategies for reducing the spread of the Ebola virus disease
An optimal control model to design strategies for reducing the spread of the Ebola virus disease Open
In this work, we formulate an epidemiological model for studying the spread of Ebola virus disease in a considered territory. This model includes the effect of various control measures, such as: vaccination, education campaigns, early dete…
View article: Stability and sensitivity analysis of the epidemiological model Be-CoDiS predicting the spread of human diseases between countries
Stability and sensitivity analysis of the epidemiological model Be-CoDiS predicting the spread of human diseases between countries Open
The Ebola virus disease is a lethal human and primate disease that requires a particular attention from the international health authorities due to important recent outbreaks in some Western African countries and isolated cases in Europe a…
View article: A simple formulation of non-Markovian SEIR
A simple formulation of non-Markovian SEIR Open
We present a formulation of the SEIR concept that represents the evolution of an epidemic under the assumption of homogeneity and uniformity of the microscopic parameters: rate of infection, incubation and recovery/removal times. Non-homog…
View article: Single-Layer, Flexible, and Depolarizing Chipless RFID Tags
Single-Layer, Flexible, and Depolarizing Chipless RFID Tags Open
International audience
View article: Nash equilibria strategies and equivalent single-objective optimization problems. The case of linear partial differential equations
Nash equilibria strategies and equivalent single-objective optimization problems. The case of linear partial differential equations Open
In this paper we study the existence and uniqueness of Nash equilibria (solution to competition-wise problems, with several controls trying to reach possibly different goals) associated to linear partial differential equations and show tha…
View article: Improving the performance of a preference-based multi-objective algorithm to optimize food treatment processes
Improving the performance of a preference-based multi-objective algorithm to optimize food treatment processes Open
This work focuses on the optimization of some high-pressure and temperature food treatments. When dealing with real--life multi-objective optimization problems, the computational cost of evaluating the considered objective functions is usu…
View article: An Algorithm for Solving a Class of Multiplayer Feedback‐Nash Differential Games
An Algorithm for Solving a Class of Multiplayer Feedback‐Nash Differential Games Open
In this work, we introduce a novel numerical algorithm, called RaBVItG (Radial Basis Value Iteration Game) to approximate feedback‐Nash equilibria for deterministic differential games. More precisely, RaBVItG is an algorithm based on value…
View article: Predicting the spread of epidemiological diseases by using a multi-objective algorithm
Predicting the spread of epidemiological diseases by using a multi-objective algorithm Open
The epidemiological models are able to predict the spread of diseases, but a previous work on calibrating some involved parameters must be done. In this work, we propose a methodology to adjust those parameters based on solving a multi-obj…
View article: Shape optimization of spatial chemostat models
Shape optimization of spatial chemostat models Open
In this work, we study the shape optimization of a continuous bioreactor in which a substrate is degraded by a microbial ecosystem in a nonhomogeneous environment. The bioreactor considered here is a three-dimensional vertically oriented c…