Las haciendas locales en Huelva a mediados del siglo XIX

Tomo II ; págs. 141-15

Properties of polypyrrole polyvinilsulfate films for dual actuator sensing systems

One of the challenges of modern science is the development of actuators able to sense working conditions while actuation, mimicking the way in which biological organs work. Actuation of those organs includes nervous (electric) pulses dense reactive gels, chemical reactions exchange of ions and solvent. For that purpose, conducting polymers are being widely studied. In this work the properties of self-supported films of the polypyrrole:polyvinilsulfate (PPy/PVS) blend polymer were assessed. X-ray photoelectron spectroscopy (XPS) studies show how during reduction / oxidation the polymer exchanges cations when immersed in a NaClO4 aqueous solution, revealing free positive charges in the electrolytic solution as the driving agents leading to the swelling/shrinking of the polymer. Eventually it is the phenomenon responsible of the actuation of the polymeric motors. Submitting the system to consecutive potential sweeps shows the reaction is really sensing the scan rate used in each cycle revealing that while actuating the system is actually sensing the electrochemical working conditions.The research was supported by European Union’s Horizon 2020 research and innovation program under the Marie Sklodowska-Curie grant agreement No 641822

Dual sensing-actuation artificial muscle based on polypyrrole-carbon nanotube composite

Dual sensing artificial muscles based on conducting polymer are faradaic motors driven by electrochemical reactions, which announce the development of proprioceptive devices. The applicability of different composites has been investigated with the aim to improve the performance. Addition of carbon nanotubes may reduce irreversible reactions. We present the testing of a dual sensing artificial muscle based on a conducting polymer and carbon nanotubes composite. Large bending motions (up to 127 degrees) in aqueous solution and simultaneously sensing abilities of the operation conditions are recorded. The sensing and actuation equations are derived for incorporation into a control system.The research was supported by European Union’s Horizon 2020 research and innovation program under the Marie Sklodowska-Curie grant agreement No 641822

Proyectos musicales inclusivos

Como consecuencia de la actual sociedad de la información y las desigualdades sociales existentes, la educación debe replantearse métodos, estrategias y concepciones para dar cabida a las nuevas necesidades creadas. El planteamiento y exposición de proyectos educativos musicales exitosos, pone de relieve la importancia de la música en toda reforma educativa. Veremos cómo la música tiene también cabida en las comunidades de aprendizaje pues ella tiene el poder intrínseco de cambio social.As a result of the development of the information society and social inequalities, education must reconsider methods, strategies and concepts to take in new needs. Planning and presentation of successful projects or musical education show the significance or Music en every educational reform. We will see how Music has its place in learning communities due toits inherent power for social change

An explanatory and predictive PLS-SEM approach to the relationship between organizational culture,organizational performance and customer loyalty: The case of health clubs

Purpose This study aims to analyze the impact and predictive capacity of organizational culture on both customer loyalty and organizational performance in health clubs using data from managers and customers of health clubs in Spain. Design/methodology/approach A total of 101 managers were asked to measure organizational culture and organizational performance and 2,931 customers were asked to indicate their customer loyalty. The proposed hypotheses were tested and their predictability assessed through PLS-SEM. A composite concept was adopted to analyze the relationships between the different constructs and their indicators. Findings The findings suggest that organizational culture has a positive relationship with both customer loyalty and organizational performance. The four main dimensions of organizational culture that influence this relationship are, in order of significance, organizational presence, formalization, atmosphere and service-equipment. The authors’ model has a very good predictive power for both dependent variables. Originality/value Customer loyalty is an aspect of health clubs that can be improved. This study highlights the importance of creating a strong organizational culture in health clubs, as it enhances and predicts customer loyalty and organizational performance. Its predictability has already been tested with samples of managers and customers, with the analysis being performed from the perspective of the organization’s management and customer perceptions. This study also contributes to the field of sport management, using a predictive PLS-SEM techniqu

Adaptación y cambio de uso de la fábrica Can Bagaria

El edifico objeto de este trabajo se encuentra en Cornellà de Llobregat, ciudad situada en la comarca del Baix Llobregat a 9km. De Barcelona, una ciudad conocida por diferentes factores: Por su proximidad a la ciudad de Barcelona, porque es un territorio de paso, igual que toda la comarca, y por la presencia del río Llobregat. En los últimos veinticinco años, el Ayuntamiento ha llevado a cabo un proceso de lenta recuperación del municipio en todas las órdenes. Se ha racionalizado la expansión urbanística y se han hecho llegar los servicios y equipamientos a toda la población. Han nacido tres grandes zonas verdes, los parques de Can Mercader, de la Niña y de la Ribera. Actualmente esta ciudad desarrolla sus nuevos barrios alrededor de grandes parques, con edificaciones de 3–4 plantas con grandes zonas comunitarias enjardinadas; este es el destino de muchas familias que se trasladan des de Barcelona dado la proximidad y la buena comunicación con la Gran ciudad. La carretera de Esplugues, es conocida por ser un punto de paso tanto de vehículos como para peatones, una zona que se ha ido modernizando con el paso del tiempo y adaptándose a las nuevas necesidades, se han construido numerosos edificios como por ejemplo comisaria de mossos d’esquadra, guardería El pedró, aparcamientos plaza del Sol. Con todo esto lo que pretendemos es hacer ver la importancia del edificio Can Bagaria, situado en un lugar privilegiado con mucho movimiento, que hasta ahora ha pasado inadvertido a todas las mejoras de la ciudad, por ese motivo creemos que es de vital importancia para la ciudad la recuperación del edificio de gran belleza arquitectónica y que pertenece a la historia de la ciudad ya que la Fábrica de Can Bagaria represento a Cornellà de Llobregat exclusivamente en el suministro de mantas a los barcos que viajaban hacia las Islas Canarias durante muchos años

Cuando sentimiento y acción confluyen en la práctica educativa. Alianzas entre educación para el desarrollo y aprendizaje servicio para una ciudadanía global

Las problemáticas basadas en el desarrollo constituyen un tema recurrente en educación. Tras resaltar la relevancia de la Educación para el Desarrollo (EpD) como elemento fundamental en la construcción de una ciudadanía global, el objetivo de este artículo consiste en relacionarla con una cultura educativa, el Aprendizaje Servicio (ApS). Éste pretende ser, así, un análisis teórico exploratorio e interpretativo sobre las potencialidades que puede aportar el ApS en la consecución de las metas planteadas por la EpD. Esta vinculación no sólo repercute en la mejora substancial de la práctica de ambas creando sinergias positivas, sino que su universalización constituye una clara incidencia positiva en el desarrollo endógeno de los pueblos, llevando a la práctica el empoderamiento real de la ciudadanía crítica, reflexiva y global. La posibilidad de otorgar el papel relevante que posee la educación como motor de desarrollo humano está a nuestro alcance: la alianza entre EpD y APS nos muestran las claves

Self-supported polypyrrole/polyvinylsulfate films: electrochemical synthesis, characterization, and sensing properties of their redox reactions

Thick films of polypyrrole/polyvinylsulfate (PPy/PVS) blends were electrogenerated on stainless‐steel electrodes under potentiostatic conditions from aqueous solution. The best electropolymerization potential window was determined by cyclic voltammetry. After removing the film from the back metal, self‐supported electrodes were obtained. Voltammetric, coulovoltammetric, and chronoamperometric responses from a LiClO4 aqueous solution indicated the formation of an energetically stable structure beyond a reduction threshold of the material. Its subsequent oxidation required higher anodic voltammetric overpotentials or longer chronoamperometric oxidation times. This structure was attributed to the formation of lamellar or vacuolar structures. X‐ray photoelectron spectroscopy analysis of the films under different oxidations states revealed that the electrochemical reactions drive the reversible exchange of cations between the film and the electrolyte. The electrical energy and the charge consumed by the reversible reaction of the film under voltammetric conditions between the constant potential limits are a function of the potential scan rate, that is, they sense the working electrochemical conditions.This project was supported by the Marie‐Sklodowska‐Curie Innovative Training Network MICACT‐H2020‐MSCA‐ITN‐2014 and by the Séneca Foundation project 19253/PI/14