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Communities in RUIdeRA

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Recent Submissions

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Generación automática de comportamiento de sentido común en entornos inteligentes: un enfoque basado en modelos de lenguaje y answer set programming
(Universidad de Castilla-La Mancha, 2024) Rubio Ruiz, Ana
En la actualidad, es común que nos refiramos a los entornos domóticos como entornos inteligentes, pero lo cierto es que se limitan a ejecutar tareas de forma autónoma según un comportamiento predefinido que no les permite adaptarse al contexto ni evolucionar frente a cambios, lo que limita su verdadera inteligencia. Este trabajo se centra en intentar superar esta barrera, empleando como base lo que se define como inteligencia en el paradigma de los Sistemas Ciberfísicos Inteligentes. La investigación propone que un entorno inteligente debe manejar conocimiento en múltiples niveles de abstracción, desde datos sensoriales hasta información semántica y conocimiento de alto nivel, para razonar y tomar decisiones adaptativas. La hipótesis central es que utilizando conocimientos que mapeen las relaciones entre el comportamiento de los dispositivos y sus implicaciones, y aplicando razonamiento basado en el sentido común, se pueden generar comportamientos adaptativos específicos para escenarios concretos. Además, se contempla que el sistema debe ser capaz de actualizarse en respuesta a cambios en su configuración o entorno. El objetivo de la tesis es verificar si un sistema basado en reglas reactivas simples puede proveer de un nivel de inteligencia mayor a los sistemas domóticos actuales, generando autónomamente estas reglas a partir del conocimiento general, del entorno, y de los dispositivos que lo componen. Para ello, se propone una representación estandarizada del entorno que permita un razonamiento detallado; un motor de inferencia para derivar el conocimiento contextual relevante; y la utilización de modelos de lenguaje a gran escala para aprovechar su vasto conocimiento de sentido común en la generación de reglas adaptativas.
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La prueba indiciaria en el contexto mexicano
(Universidad de Castilla-La Mancha, 2024) Cisneros Gutiérrez, Octavio Román
La valoración de la prueba circunstancial, por conducto del juzgador tiene el mismo valor probatorio que la prueba judicial, y en muchos xe los casos los jueces no le dan el interés adecuado por ser un hecho circunstancial.
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Bioleaching of metal polluted mine tailings aided by ultrasound irradiation pretreatment
(Elsevier, 2023-08-15) Hernández, Irene Acosta; Díaz, Hassay Lizeth Medina; Fernández Morales, Francisco Jesús; Rodríguez Romero, Luis; Villaseñor Camacho, José; Reychler, Grégory
Bioleaching of metal mine tailings is a well-known technology capable of recovering metals from these wastes in a sustainable way. Its major drawbacks are the relatively slow extraction rate and low efficiency, which usually imply long operating times. In this work it was assessed if the application of a pretreatment consisting in ultrasounds (US) irradiation could improve the rate and efficiency of the subsequent bioleaching process; additionally, it was also checked if US affects the activity of the acidophilic autochthonous microbial population present in the tailings. Bench-scale slurry phase batch experiments were performed in two steps: (1) US pretreatment and (2) bioleaching using a biostimulation strategy. Different frequencies (37 and 80 kHz) and energy dosages (0–18 kJ g−1) were used. The results obtained showed that the application of US had a positive impact in the process by increasing the leaching rate of all the metals studied (Fe, Al, Zn, Mn, and Cu). The effect of the US was more remarkable for a frequency of 80 than 37 kHz; in addition, a maximum of the bioleaching rate was obtained for an energy dosage in the range 10–15 kJ g−1. Specifically, bioleaching rates increased by 150, 95, 48, 38 and 28% for Zn, Al, Mn, Cu and Fe, respectively, due to the enhancement of the particle fragmentation and mass transfer rates caused by the US irradiation. However, it must be taken into account that high energy dosages could have a detrimental effect over the microorganism’s population, slowing down the overall process of metal leaching.
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2DOF-based current controller for single-phase grid-connected voltage source inverter applications
(Elsevier, 2023-05-02) López Alcolea, Francisco Javier; Molina Martínez, Emilio José; Parreño Torres, Alfonso; Vázquez del Real, Javier; Roncero Sánchez Elipe, Pedro Luis
This paper presents the design of a discrete-time control scheme for the current injected into the grid by a single-phase voltage source inverter (VSI). The VSI is connected to the grid by means of an LCL filter that attenuates the switching harmonics present in the output waveform of the inverter. The current control is based on a resonant regulator implemented in a Two-Degrees-Of-Freedom (2DOF) scheme that allows the location of all the poles to be defined in the closed loop of the system without the need for observers and measuring only the current injected into the grid. This control scheme, therefore, allows the attenuation of the resonance frequency of the LCL filter and requires no additional damping methods with which to mitigate the resonance phenomenon. The design parameters can be obtained using a fairly straightforward mathematical approach that involves only operations with real numbers. The simulation and experimental results obtained show that the control scheme performs correctly even considering changes in the grid inductance.
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Assessment of functional respiratory complaints and related factors in people with hypermobile Ehlers-Danlos syndrome: Cross-sectional study
(Elsevier, 2023-06-15) Reina Gutiérrez, Sara; Caty, Gilles D.; Torres Costoso, Ana Isabel; Pitance, Laurent; Manicourt, Daniel Henri; Reychler, Grégory
Background Hypermobile Ehlers-Danlos Syndrome (hEDS) is the most common type of EDS. Apart from joint symptoms, people with hEDS have systemic manifestations as a chronic modification of the breathing pattern (functional respiratory complaints (FRCs)) and mental disorders. However, the prevalence of FRCs, and its relationship with mental disorders, have not yet been estimated for this population. Objectives To assess the FRCs, central sensitization, disease perception, depression, and anxiety in people with hEDS from Belgium; and to identify the clustering of FRCs and determine any association with the characteristics assessed for this sample. Methods This cross-sectional study assessed socio-demographic characteristics, Nijmegen questionnaire (NQ), Central Sensitization Inventory (CSI), Brief Illness Perception Questionnaire, and the Hospital Anxiety and Depression Scale (HADS) in people with hEDS from Belgium. A two-step cluster analysis was performed to identify clusters according to NQ, and to understand how the other questionnaires are grouped among these clusters. Results The Spearman correlation coefficients showed that all the outcomes were significantly and positively correlated with each other (p<0.05). Furthermore, 84.9% of the sample had symptoms suggestive of FRCs, and 54.3% had probable anxiety. Three clusters were grouped (no FRCs, mild FRCs, and severe FRCs), with NQ, HADS-D and CSI-part A being the variables that contributed the most. People from cluster of severe FRCs got the worst scores for all the questionnaires. Conclusion FRCs, central sensitization, depression, and anxiety are prevalent comorbidities in people with hEDS. Moreover, those people with FRCs had worse results in the investigated parameters, with depression being the variable that contributed the most to the clusters of FRCs. Consequently, investigating mechanisms for these co-occurring symptom profiles may improve our understanding of pathogenesis and indicate new management strategies to alleviate these symptoms and lead to the development of more effective care for persons with hEDS.