Listar por autor "Galán-García, José Luis"
Mostrando ítems 1-20 de 55
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A discrete-time queue with service time adjustments and general retrial times.
Atencia-McKillop, Iván
; Galán-García, José Luis; Padilla-Domínguez, Yolanda Carmen; Rodríguez-Cielos, Pedro (Elsevier, 2025-03-05)
This paper examines a discrete-time retrial queueing system where incoming customers can either choose a last-come, first-served (LCFS) discipline or enter an orbit. It accounts for the possibility of varying service times, ... -
A discrete-time queueing system with three different strategies
Atencia-McKillop, Iván; Padilla-Domínguez, Yolanda Carmen; Galán-García, José Luis; Aguilera-Venegas, Gabriel; Rodríguez-Cielos, Pedro; Galán-García, María Ángeles[et al.] (Elsevier, 2021-09)
We consider a discrete-time Geo/G/1/inf system in which a customer that finishes its first essential service may opt to abandon the system, to receive a second optional service or to go at the head of the queue in order ... -
A discrete-time retrial queueing system with changes in the service times and retrial times.
Atencia-McKillop, Iván; Galán-García, José Luis; Aguilera-Venegas, Gabriel; Galán-García, María Ángeles; Rodríguez-Cielos, Pedro; Padilla-Domínguez, Yolanda Carmen; Rodríguez-Padilla, Pablo[et al.] (2024)
This paper investigates a discrete-time retrial queueing system wherein arriving customers can choose between adopting a Last-Come-First-Served (LCFS) discipline or joining the orbit. The potential variability in service ... -
A Genetic Algorithm and an Exact Algorithm for Classifying the Items of a Questionnaire Into Different Competences
Galán-García, José Luis; Merino-Córdoba, Salvador; Martínez-del-Castillo, Javier; De-Aguilera-Moyano, Miguel (2014-07-16)
A Likert scale is a psychometric response scale primarily used in questionnaires to obtain participant's preferences or degree of agreement with a statement or set of statements. Respondents are asked to indicate their ... -
A Geo[X]/G[X]/1 retrial queueing system with removal work and total renewal discipline
Atencia-McKillop, Iván; Galán-García, José Luis; Aguilera-Venegas, Gabriel; Rodríguez-Cielos, Pedro; Galán-García, María Ángeles (Elsevier, 2018-02)
In this paper we consider a discrete-time retrial queueing system with batch arrivals of geometric type and general batch services. The arriving group of customers can decide to go directly to the server expelling out of ... -
A library in CoCoA for implementing railway interlocking systems.
Hernando-Esteban, Antonio; Galán-García, José Luis; Padilla-Domínguez, Yolanda Carmen; Galán-García, María Ángeles (Elsevier, 2025)
In this paper, we propose a user-friendly library in CoCoA to address and completely resolve the challenges posed by the highly efficient and intriguing mathematical model introduced in Hernando et al., (2023) for implementing ... -
A Non Markovian Retrial Queueing System
Atencia-McKillop, Iván; Galán-García, José Luis; Aguilera-Venegas, Gabriel; Rodríguez-Cielos, Pedro; Galán-García, María Ángeles; Padilla-Domínguez, Yolanda Carmen; Rodríguez-Padilla, Pablo[et al.] (2022-06-13)
Researches on retrial queues with non-geometrical retrial times is motivated by real computers and telecommunication networks, where retrial times can hardly be geometrical distributed. The inherent difficulty with ... -
A non markovian retrial queueing system
Atencia-McKillop, Iván; Galán-García, María Ángeles; Aguilera-Venegas, Gabriel; Galán-García, José Luis (Elsevier, 2023)
This paper studies a discrete-time queueing system in which a customer who enters in the system with a server occupied may choose to go to the retrial group or to begin its service displacing to the retrial group the ... -
A Portable Knowledge Based System for Car Breakdown Evaluation
Desarrollo de un sistema experto para ayudar a conductores a tomar decisiones en el caso que se encienda alguna luz en el salpicadero. -
A probabilistic extension to Conway’s Game of Life
Aguilera-Venegas, Gabriel; Galán-García, José Luis; Egea-Guerrero, Rocío; Galán-García, María Ángeles; Rodríguez-Cielos, Pedro; Padilla-Domínguez, Yolanda; Galán-Luque, María[et al.] (Springer (Advances in computational mathematics), 2019)
The “Game of life” model was created in 1970 by the mathematician John Horton Conway using cellular automata. Since then, different extensions of these cellular automata have been used in many applications. In this work, ... -
A proposal of a mixed diagnostic system based on decision trees and probabilistic experts rules
Aguilera-Venegas, Gabriel; Roanes-Lozano, Eugenio; Rojo-Martínez, Gemma; Galán-García, José Luis (2023)
Decision trees and rule-based expert systems (RBES) are standard diagnostic tools. We propose a mixed technique that starts with a probabilistic decision tree where information is obtained from a real world data base. The ... -
A RBES for Generating Automatically Personalized Menus
Food bought at supermarkets in, for instance, North America or the European Union, give comprehensive information about ingredients and allergens. Meanwhile, the menus of restaurants are usually incomplete and cannot be ... -
A stepwise Cas course for solving First-Order Partial Diferential Equations
Aguilera-Venegas, Gabriel; Galán-García, José Luis; Galán-García, María Ángeles; Padilla-Domínguez, Yolanda Carmen; Rodríguez-Cielos, Pedro; Rodríguez-Cielos, Ricardo[et al.] (2014-07-16)
Partial Differential Equations (PDE) is a very important topic in advance Mathematics for Engineering. The three main first-order PDE problems that a basic course must deal with are: \begin{enumerate} \item {\bf Pfaff ... -
Advanced techniques to compute improper integrals using a CAS
Aguilera-Venegas, Gabriel; Galán-García, José Luis; Galán-García, María Ángeles; Padilla-Domínguez, Yolanda Carmen; Rodríguez-Cielos, Pedro; Rodríguez-Cielos, Ricardo[et al.] (2014-07-16)
Let us consider the following types of improper integrals: $$ \int_0^\infty f(t)\:{\rm d}t \qquad ; \qquad \int_{-\infty}^0 f(t)\:{\rm d}t \qquad {\rm and} \qquad \int_{-\infty}^\infty f(t)\:{\rm d}t $$ \medskip Let ... -
An arriving decision problem in a discrete-time queueing system
Atencia-McKillop, Iván; Galán-García, José Luis; Aguilera-Venegas, Gabriel; Rodríguez-Cielos, Pedro; Galán-García, María Ángeles (Springer, 2019-08)
This paper discusses a discrete-time queueing system in which an arriving customer may adopt four different strategies; two of them correspond to a LCFS discipline where displacements or expulsions occur, and in the other ... -
An Approach to Overtaking Station Layout Diagram Design Using Graphs
The authors have approached in the past different railway engineering problems (e.g. [1,2]) and have developed software for the Spanish Railway Foundation [3], mainly using computer algebra systems (CAS). Now a CAS is used ... -
Association between exposure to air pollution and blood lipids in the general population of Spain.
Valdés Hernández, Sergio; Doulatram Gamgaram, Viyey Kishore; Maldonado Araque, Cristina; García-Escobar, Eva; García Serrano, Sara; Oualla-Bachiri, Wasima; García- Vivanco, Marta; Garrido, Juan Luis; Gil, Victoria; Martín-Llorente, Fernando; Calle-Pascual, Alfonso; Castaño, Luís; Delgado, Elías; Menéndez, Edelmiro; Franch-Nadal, Josep; Gaztambide, Sonia; Girbés, Joan; Chaves, F. Javier; Galán-García, José Luis; Aguilera-Venegas, Gabriel; Vallvé, Joan Carles; Amigó, Nuria; Guardiola, Montse; Ribalta, Josep; Rojo-Martínez, Gemma[et al.] (Wiley, 2023-09-23)
Background and Aims: We aimed to assess the associations of exposure to air pollutants and standard and advanced lipoprotein measures, in a nationwide sample representative of the adult population of Spain.Methods: ... -
Automated generation of contrapuntal musical compositions using probabilistic logic in Derive
Aguilera-Venegas, Gabriel; Galán-García, José Luis; Madrid, Rafael; Martínez, Antonio Manuel; Padilla-Domínguez, Yolanda; Rodríguez-Cielos, Pedro[et al.] (Elsevier (Mathematics and computers in simulation), 2010)
In this work, we present a new application developed in Derive 6 to compose counterpoint for a given melody (“cantus firmus”). The result is non-deterministic, so different counterpoints can be generated for a fixed melody, ... -
¿Cómo podemos ayudar al alumnado de bachillerato con sus matemáticas en el inicio de sus estudios de ingeniería?
Aguilera-Venegas, Gabriel; Galán-García, José Luis; Galán-García, María Ángeles; Padilla-Domínguez, Yolanda Carmen; Rodríguez-Cielos, Pedro; Rodríguez-Padilla, Pablo[et al.] (2023)
El objetivo principal de esta comunicación es describir la experiencia que, desde el año 2017, venimos desarrollando un grupo de Personal Docente e Investigador (PDI) de la Universidad de Málaga con el alumnado de nuevo ...