Phenomenological based model of hydrogen production using an alkaline self-pressurized electrolyzer

© 2019 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other works.The aim of this work is to develop the phenomenological based modeling of a self-pressurized alkaline electrolyser with the objective of predicting the cross-contamination of the gases produced. A proposed model, built in Matlab®, represents the dynamical evolution in real electrolysers, and anticipates operational variables: level, pressure and all concentrations. Dynamic responses in the concentrations of the electrolytic cell, and variations in both level and pressure at the chamber due to the change in current and diffusivity, are reported. The equations by which the variables can be computed are also presented. The proposed model is ready for the corresponding adjustment of parameters based on experimental measurements taken from an available prototype and through a suitable identification process.Peer ReviewedPostprint (author's final draft

Robot Control on the basis of Bio-electrical signals

This article shows the experiences carried out in the context of human/robot communication, on the basis of brain bio-electrical signals, with the application of the available technologies and interfaces which have facilitated the reading of the user’s brain bio-electrical signals and their association to explicit commands that have allowed the control of biped and mobile robots through the adaptation of communication devices. Our work presents an engineering solution, with the application of technological bases, the development of a high- and low-level communication framework, the description of experiments and the discussion of the results achieved in field tests.I Workshop Innovación en Sistemas de Software (WISS)Red de Universidades con Carreras en Informática (RedUNCI

Rendimiento del remate en K1: Influencia de la rotación y la zona de recepción en equipos de voleibol de alto nivel masculino

El objetivo de este estudio, fue investigar la asociación de la zona de recepción con el rendimiento del remate considerando el impacto de la rotación, en equipos de voleibol masculino de alto nivel. Fueron analizados 29 partidos de selecciones internacionales masculinas de máximo nivel, obteniendo una muestra de 3689 remates en la fase de KI. Las variables analizadas fueron: la rotación del equipo en recepción, la zona de recepción y el rendimiento del remate. Se emplearon modelos de regresión ordinales para determinar la influencia de la zona de recepción y la interacción de la rotación en el rendimiento del remate. Los resultados mostraron interacciones significativas entre la rotación y la zona de recepción, que permiten entender la mayor o menor probabilidad de conseguir un mejor rendimiento en remate (p<0.001) en algunas de las rotaciones. En conclusión, el rendimiento del remate es diferente en función de la interacción de la rotación del equipo y de la zona de recepción, lo que podría asociarse con decisiones tácticas en la ejecución del saque.The purpose of this study was to investigate the association between the reception zone and the spiking performance in each of the game rotations in top level men's volleyball teams. The sample consisted of 29 men´s matches of final phases in Olympic Games, World League and World Cup between 2012 and 2016, obtaining a sample of 3,689 spikes in the K1 phase. The variables analyzed were: the rotation of the reception team, the reception area and the spike performance. Ordinal regression models were used to determine the influence of the receiving zone and the interaction of rotation on spike performance. The results show significant interaction between the rotation and the reception area on spike performance (X²₄₆ = 127.885; p <.001; r2 = .036), which allow us to understand the greater or lesser probability of achieving a better spike performance in some of the rotations. In conclusion, the performance of the spike varies depending on the interaction of the rotation of the team and the reception area, but this relation in global level, only explain 3.6% of the variance of the spike. The analysis of the situations in which significance has been found could be associated with strategic decisions in the execution of the serve and the training of the K1

Sexist Myths Emergency Healthcare Professionals and Factors Associated with the Detection of Intimate Partner Violence in Women

This study analysed the capacity of emergency physicians and nurses working in the city of Granada (Spain) to respond to intimate partner violence (IPV) against women, and the mediating role of certain factors and opinions towards certain sexist myths in the detection of cases. This is a cross-sectional study employing the physician readiness to manage intimate partner violence survey (PREMIS) between October 2020 and January 2021, with 164 surveys analysed. Descriptive and analytical statistics were applied, designing three multivariate regression models by considering opinions about different sexist myths. Odds ratios and 95% confidence intervals (CIs) were considered for the detection of cases. In the past six months, 34.8% of professionals reported that they had identified some cases of IPV, particularly physicians (OR = 2.47, 95% CI = 1.14–5.16; OR = 2.65, 95% CI = 1.26–5.56). Those who did not express opinions towards sexist myths related to the understanding of the victim or the consideration of alcohol/drug abuse as the main causes of violence and showed a greater probability of detecting a case (NS) (OR = 1.26 and OR = 1.65, respectively). In order to confirm the indicia found, further research is required, although there tends to be a common opinion towards the certain sexual myth of emergency department professionals not having an influence on IPV against women.Support and Promotion of Research on Equality and Inclusion, programme 50 of the Research and Transfer Plan (University of Granada

H2 purity control for highpressure alkaline electrolyzers

This paper proposes a control strategy that mitigates the cross contamination of H2 and O2 in a high-pressure alkaline electrolyzer, which consequently increases the supplied gases purity. In order to reduce the diffusion of gases through the membrane, the controller establishes the opening of two outlet valves based on the pressure of the system and the difference in liquid level between both separation chambers. Therefore, a multiple input - multiple output optimal controller is designed here. For this purpose, an available high-fidelity model was simplified in order to obtain a control-oriented model. The proposed controller was evaluated in simulation using the high-fidelity nonlinear model in a wide operating range and was compared with a pair of decoupled PI controllers. The resulting impurity of gases was below 1% in all cases.This work has been partially funded by the DEOCS project (DPI2016-76493-C3-3R).Peer ReviewedPostprint (author's final draft

La propiedad de la tierra como fuente de poder local. Santa Fe entre el voto censitario y el sufragio universal

La propiedad de la tierra como fuente de poder local. Santa Fe entre el voto censitario y el sufragio universa

Procesos electorales y mecanismos de control político. (La composición sociolaboral del cuerpo electoral granadino)

Procesos electorales y mecanismos de control pol&iacute;tico. (La composici&oacute;n sociolaboral del cuerpo electoral granadino

Caracterización fenotípica y molecular de poblaciones de zacate punta blanca (Digitaria californica (Benth.) Henr.)

Phenotypic and genotypic diversity were explored and characterized in arizona cottontop [Digitaria californica (Benth.) Henr.] populations at Chihuahua state grasslands. Principal component and cluster analysis were applied to the data using Ward method. There were differences (PSe exploró y caracterizó la diversidad fenotípica y genotípica de poblaciones del pasto punta blanca [Digitaria californica (Benth.) Henr.], en pastizales de Chihuahua. Se realizó análisis de componentes principales y conglomerados. Se observaron diferencias significativas (