Diseño de mecanismo de batimiento y semiplegado de las alas de un ornitóptero

En este proyecto se realiza el diseño de un ornitóptero que incluye un mecanismo que integra la capacidad del batimiento de las alas, y el semiplegado de las mismas, de forma que incluye una articulación que permite imitar de forma más fiel el vuelo de los pájaros en la naturaleza. Centrándose fundamentalmente en el diseño, el proyecto incluye también un estudio estructural del mecanismo, así como un estudio aerodinámico y de los sistemas propulsivos necesarios. Y en último lugar se muestran las conclusiones del proyecto donde se tienen en cuenta aspectos no considerados y mejoras futuras.The aim of this project is the desing os an ornithopter that includes a mechanism that integrates the ability to flap the wings, and the semi-folding of them, so that includes a joint that allows to more faithfully imiatate the flight of birds in the nature. Focusing on the design, tne Project also includes a structural study of the mechanism, as well as an aerodynamic study and the necessary propulsive systems. And lastly, the conclusions of the Project will be considered where unrelated aspects and future improvements are taken into account.Universidad de Sevilla. Grado en Ingeniería Aeroespacia

Un señorío eclesiástico en la frontera castellana

El régimen señorial en la Andalucía bajomedieval ha sido el objeto de numerosos trabajos publicados en los últimos años, en los que se analiza en profundidad este fenómeno. En esta línea de investigación se incluye el estudio del Adelantamiento de Cazorla, señorío jiennense de los arzobispos de Toledo, cuya característica fundamental radica en ser un señorío eclesiástico, asentado en primera línea fronteriza y, por tanto, con una misión eminentemente militar. La proximidad con el reino de Granada y, por otro lado, la imposibilidad por parte de los prelados toledanos de encargarse personalmente de la defensa del territorio, dio lugar a que adaptasen el sistema empleado por la Corona en las zonas fronterizas, los Adelantamientos, apareciendo, por estas circunstancias, la figura del adelantado de Cazorla, cuyas atribuciones guardan gran parecido con las de los oficiales reales

Ascenso político y formación del patrimonio de Juan Fernández Galindo, Comendador de Reina, durante el reinado de Enrique IV

En este trabajo se ofrece una visión de la carrera político-militar de Juan Fernández Galindo, desde sus inicios en la casa del condestable de Castilla, don Álvaro de Luna hasta alcanzar un puesto destacado en la corte de Enrique IV de Castilla. Paralelamente a su ascenso se va gestando un importante patrimonio que centrado en un primer momento en Antequera, termina por concentrarse en Ecija, ciudad en la que llegaría a formar parte de la oligarquía urbana, desempeñando una regiduría o una alcaldía mayor.On offre dans ce travail un vision de la carière politico-militaire de Juan Fernández Galindo, depuis ses débuts chez le connétable de Castille don Alvaro de Luna jusqu’à l’obtention d’un poste remarquable à la cour d’Henri IV de Castille. Parallèlement à sa promotion, un important patrimoine se développe, centré d’abord à Antequera puis se concentrant à Ecija, ville dans laquelle il fera partie de l’oligarchie urbaine, remplisssant le charge d’échevin ou de maire.This article gives an overview of Juan Fernández Galindo’s political and military career from its beginnings at the household of the High Constable of Castile, sir Alvaro de Luna, until he reached a prominent position at the Court of Enrique IV of Castile. Parallel to his ascension he began to accrue important real properties first around the town of Antequera and finally around the town of Ecija, where he would become part of the town’s oligarchy as an alderman and a mayor

Modeling ionic transport through ion-exchange membranes

Electrodialysis (ED) is a membrane separation process in which ions are transferred through selective ion-exchange membranes (IEMs) from one solution to another using an electric field as the driving force. ED is a mature technology in the field of brackish water desalination, but in the last decades, the development of new membranes has allowed to extend its application in the food, drug, and chemical process industry, as well as in the environmental engineering field. The effectiveness of ED separation depends on numerous variables, including cell properties membranes properties and operational parameters (electric current; electrical resistance of IEMs and electrolyte; pH and concentration). All these parameters are interrelated between them, and the study of their effect is important to design and optimize the process. A key factor to understand the process is the ions transport through the IEMs, together with the concentration and potential profile create in the boundary layer between the electrolyte and the membrane charged surface

Production of HCl and LiOH from Lithium-ion Batteries Leaching Solution by Electrodialysis.

In this work, electrodialysis is proposed to produce HCl and LiOH from a LIBs leaching solution after metals precipitation. The experimental consists of an electrodialytic cell with four compartments divided by two cation exchange membranes (CEM) and one anion exchange membrane (AEM) arranged alternatively between the anode and cathode. The cell configuration results in the generation of an acidic and alkaline stream on both compartment sides of the feed compartment, which was allocated in the third compartment between the AEM and 2nd CEM. The application of an electrical current between the electrodes promotes the mobilization, on one hand of anions from the feed compartment through the AEM to the acid compartment, and on the other hand, of cations through the CEM to the alkaline channel. Both, acidic and alkaline compartment, were electrically balanced by H+ and OH- generated by water oxidation (anode) and reduction (cathode). Experiments were carried out using a feed solution composed of lithium (0.8M) and chloride ions (0.8M) with an initial pH of 7. That solution simulated the final solution once metals from LIBs were extracted using HCl (explain the presence of Cl- in the solution) and separated by precipitation (except Li+). Different parameters such as current density, compartment size and initial feed concentration were studied. Results indicate that the electrodialytic method could be a useful technique not only for concentrate LiOH, but also to generate HCl and LiOH stream that can be reuse for the extraction and precipitation steps, respectively, in the LIBs recycling process.Universidad de Málaga. Campus de Excelencia Internacional Andalucía Tech

Multiphysics Modeling of a reversible PEM Electrolyzer & Fuel Cell.

Electrolyzers are used to produce hydrogen and oxygen from electricity through water electrolysis. If the electricity comes from renewable sources, such as solar energy, the produced hydrogen, denoted as green-H2. Despite often forgotten, electrolyzers also produce pure O2, which has many different uses. E.g., in oxy-combustion processes. The storage and transport systems for H2 are problematic. they require high pressures and are susceptible of leakage and other losses. Hydrogen Fuel Cells use H2 to produce electricity, following the reversed operation than electrolyzers. Fuel Cells have high energy conversion efficiencies. Fuel Cells / electrolyzers with a polymer electrolyte membrane (PEM) are based on a cation exchange membrane that allows the transport of protons. It is possible to create a reversible device that can act as fuel cell or electrolyzer depending on the directions of the electrical and gas currents. A multiphysics model for a reversible PEM Electrolyzer – Fuel Cell has been implemented and solved. The model combines fluid dynamics to model the inflow/outflow of liquid and gasses: water, hydrogen, Oxygen, and Nitrogen. The model considers the relationship between the electrochemical reactions and the external electrical circuit, quantifying the electrical efficiency of the electrochemical device and the relationship with the extent of the reactions. In addition to this, the model addresses the two-directional coupling with temperature. I.e., the model includes the heat source due to activation and ohmic losses and the effect of the temperature on the efficiency of the hydrogen production. Results show that it is theoretically feasible to use reversible electrolyzers – fuel cells devices for the efficient production and utilization of green hydrogen.II Plan Propio de Investigación y Transferencia de la Universidad de Málaga. Ayudas a proyectos para la transición ecológica y digital: TED2021-130756B-C31 Universidad de Málaga. Campus de Excelencia Internacional Andalucía Tech

Libro de Apeo y Repartimiento de La Zubia (Granada) de 1571-1593

Edicion y estudio del Libro de Apeo y Repartimiento de la Zubia, 1572-1593.Grupo Investigación HUm-165: Patrimonio, Cultura y Ciencia Medievales Manuel Espinar Moreno,. Centro Documental del Marquesado del Cenete Departamento de Historia Medieva

Free as a Bird: Event-Based Dynamic Sense-and-Avoid for Ornithopter Robot Flight

Autonomous flight of flapping-wing robots is a major challenge for robot perception. Most of the previous sense-and-avoid works have studied the problem of obstacle avoidance for flapping-wing robots considering only static obstacles. This letter presents a fully onboard dynamic sense-and-avoid scheme for large-scale ornithopters using event cameras. These sensors trigger pixel information due to changes of illumination in the scene such as those produced by dynamic objects. The method performs event-by-event processing in low-cost hardware such as those onboard small aerial vehicles. The proposed scheme detects obstacles and evaluates possible collisions with the robot body. The onboard controller actuates over the horizontal and vertical tail deflections to execute the avoidance maneuver. The scheme is validated in both indoor and outdoor scenarios using obstacles of different shapes and sizes. To the best of the authors’ knowledge, this is the first event-based method for dynamic obstacle avoidance in a flapping-wing robot.Consejo Europeo de Investigación (ERC) 788247Comisión Europea - Proyecto AERIAL-CORE H2020-2019-871479Ministerio de Universidades FPU19/0469

El fenómeno del dopaje desde la perspectiva de las ciencias sociales. V.2

El volumen recoge una selección de las comunicaciones presentadas al 5º Congreso Internacional "Deporte, Dopaje y Sociedad", organizado conjuntamente por la Universidad Politécnica de Madrid y por la Agencia Española de Protección de la Salud en el Deporte (AEPSAD)