Study of systems powered by triboelectric generators for bioengineering applications

Treballs Finals de Grau d'Enginyeria Biomèdica. Facultat de Medicina i Ciències de la Salut. Universitat de Barcelona. Curs: 2020-2021. Director: Pere Lluís Miribel Català. Co-director: Manel Puig i Vida

Abramos la mirada

Los medios de comunicación son creadores de estereotipos. Esta función la realizan consciente e inconscientemente pero su poder queda patente en la mente de los consumidores de los mass media. Por este motivo se hace necesario educar a la sociedad en un buen consumo de medios y, principalmente, a los más jóvenes ya que se encuentran en una etapa de la vida muy importante para su formación como individuos. Con este trabajo queremos presentar cómo se puede educar a los adolescentes en el consumo de estereotipos a través del portal Rostros de Mujer

Microwave-Assisted Pillaring of a Montmorillonite with Al-Polycations in Concentrated Media

[EN]A montmorillonite has been intercalated with Al3+ polycations, using concentrated solutions and clay mineral dispersions. The reaction has been assisted by microwave radiation, yielding new intercalated solids and leading to Al-pillared solids after their calcination at 500 C. The solids were characterized by elemental chemical analysis, X-ray diffraction, FTIR spectroscopy, thermal analyses, and nitrogen adsorption. The evolution of the properties of the materials was discussed as a function of the preparation conditions. Microwave treatment for 2.5 min provided correctly pillared solids

Grasa corporal en los árbitros y árbitros asistentes españoles de fútbol de élite: estudio de seguimiento durante un año

  Introducción: La literatura actual relativa a la composición corporal de los árbitros de fútbol de élite es escasa y prácticamente inexistente. Por tanto, los objetivos de este estudio fueron evaluar y realizar un seguimiento del porcentaje de grasa corporal (%GC) de los árbitros de fútbol de élite españoles, y de los árbitros asistentes, a lo largo de toda la temporada.Material y métodos: En este estudio participaron 228 árbitros y árbitros auxiliares (edad media 32,5 ± 5,1 años) que arbitran en la primera división de España (La Liga), la segunda división y la segunda división B. Se utilizó un analizador de impedancia bioeléctrica (TANITA BC 418-MA) para evaluar el %GC. Durante la temporada se realizaron un total de 4 mediciones a los árbitros de primera división, y 3 al resto de grupos.Resultados: Realizando un análisis por categoría y función, los auxiliares de primera división tuvieron un mayor %GC en todas las evaluaciones (p < 0,05). Se observaron pequeñas variaciones (de alrededor del 1%) en cuanto al %GC dentro de los distintos grupos a lo largo de la temporada de competición.Conclusión: El %GC en los árbitros españoles de élite permanece constante, tras analizar la categoría, función y edad, a lo largo de la temporada de competición. Todos los grupos incluidos en el estudio reportaron unos valores saludables en cuanto al %GC, comprendidos entre el 8 y el 14%, lo que podría contribuir directamente a conseguir los elevados estándares requeridos para el arbitraje, y a la mejora del nivel de arbitraje de las ligas españolas

Body fat in elite Spanish football referees and assistants: A 1-year follow-up study

Introduction The current literature about the body composition of elite football referees is scarce and almost non-existent. Therefore, the aim of this study was to assess and track the percentage of body fat (%BF) of elite Spanish football referees and assistant referees across an entire season.Material and methods Two hundred and twenty-eight referees and assistant referees (mean age 32.5 ± 5.1 y), refereeing in Spanish First category (La Liga), Second category, and Second-B category, took part in this study. A bioelectrical impedance analyser (TANITA BC 418-MA) was used to evaluate %BF. A total of four-time-points for 1st category referees and three for all other groups were performed throughout the season.Results Analysing by category and role, 1st category assistants had the highest %BF in all assessments (p < 0.05). Small variations (around 1%) in %BF within groups were observed across the competitive season.Conclusion The %BF in elite Spanish referees remains constant, analysing by category, role and age, throughout a competitive season. All groups in this study reported healthy %BF values, between 8 and 14%, which might directly help to achieve the high standards required when refereeing and to improve the level of refereeing in the Spanish leagues

Greix corporal en els àrbitres i àrbitres assistents espanyols de futbol d’elit: estudi de seguiment durant un any

  Introducció: La literatura actual relativa a la composició corporal dels àrbitres de futbol d’elit és escassa i pràcticament inexistent. Per aquest motiu, l’objectiu d’aquest estudi fou avaluar i fer un seguiment del percentatge de greix corporal (%GC) dels àrbitres de futbol d’elit espanyols, i dels àrbitres auxiliars, durant tota una temporada.Material i mètodes: Participaren a l’estudi 228 àrbitres i àrbitres assistents (mitjana d’edat 32,5 ± 5,1), que arbitren a la primera divisió d’Espanya (La Liga), la segona divisió i la segona divisió B. S’utilitzà un analitzador d’impedància bioelèctrica (TANITA BC 418-MA) per avaluar el %GC. Durant la sessió s’acompliren 4 mesuraments als àrbitres de primera divisió, i 3 als de la resta de grups.Resultats: Feta l’anàlisi per categoria i funció, els assistents de primera divisió reflectiren un %GC major a totes les valoracions (p < 0,05). Pel que fa al %GC, s’observaren petites variacions (del voltant de l’1%) dins els grups al llarg de la temporada de competició.Conclusió: El %GC del àrbitres espanyols d’elit roman constant, després d’haver analitzat la categoria, funció i edat, al llarg de la temporada de competició. Quant a greix corporal, tots els grups inclosos a l’estudi reportaren uns valors saludables, compresos entre el 8 i el 14%, cosa que podria contribuir directament a aconseguir els alts estàndards requerits per arbitrar, i a millorar el nivell d’arbitratge de les lligues espanyoles

Body fat in elite Spanish football referees and assistants: A 1-year follow-up study

Introduction The current literature about the body composition of elite football referees is scarce and almost non-existent. Therefore, the aim of this study was to assess and track the percentage of body fat (%BF) of elite Spanish football referees and assistant referees across an entire season. Material and methods Two hundred and twenty-eight referees and assistant referees (mean age 32.5 ± 5.1 y), refereeing in Spanish First category (La Liga), Second category, and Second-B category, took part in this study. A bioelectrical impedance analyser (TANITA BC 418-MA) was used to evaluate %BF. A total of four-time-points for 1st category referees and three for all other groups were performed throughout the season. Results Analysing by category and role, 1st category assistants had the highest %BF in all assessments (p < 0.05). Small variations (around 1%) in %BF within groups were observed across the competitive season. Conclusion The %BF in elite Spanish referees remains constant, analysing by category, role and age, throughout a competitive season. All groups in this study reported healthy %BF values, between 8 and 14%, which might directly help to achieve the high standards required when refereeing and to improve the level of refereeing in the Spanish leagues. Introducción La literatura actual relativa a la composición corporal de los árbitros de fútbol de élite es escasa y prácticamente inexistente. Por tanto, los objetivos de este estudio fueron evaluar y realizar un seguimiento del porcentaje de grasa corporal (%GC) a los árbitros de fútbol de élite españoles, y a los árbitros asistentes, a lo largo de toda la temporada. Material y Métodos En este estudio participaron doscientos veintiocho árbitros y árbitros asistentes (edad media 32,5 ± 5,1), que arbitran en la primera división de España (La Liga), la segunda división y la segunda división B. Se utilizó un analizador de impedancia bioeléctrica (TANITA BC 418-MA) para evaluar el porcentaje de grasa corporal. Durante la temporada se realizaron un total de cuatro mediciones en los árbitros de primera división, y tres para el resto de los grupos. Resultados Realizando un análisis por categoría y función, los asistentes de primera división tuvieron un mayor porcentaje de grasa corporal en todas las evaluaciones (p < 0,05). Se observaron pequeñas variaciones (de alrededor del 1%) en cuanto al porcentaje de GC dentro de los distintos grupos a lo largo de la temporada de competición. Conclusión El porcentaje de grasa corporal en los árbitros españoles de élite permanece constante, tras analizar la categoría, función y edad a lo largo de la temporada de competición. Todos los grupos incluidos en el estudio reportaron unos valores saludables en cuanto a grasa corporal, comprendidos entre el 8 y el 14%, lo que podría contribuir directamente al logro de los elevados estándares requeridos para el arbitraje, y a la mejora del nivel de arbitraje en las ligas españolas

Forecasting ARIMA models for atmospheric vineyard pathogens in Galicia and Northern Portugal: Botrytis cinerea spores

Botrytis cinerea is the cause of the most common disease in the Galician and Portuguese vineyards. Knowledge of the spore levels in the atmosphere of vineyards is a tool for forecasting models of the concentration of spores in order to adjust the phytosanitary treatments to real risk infection periods. The presented study was conducted in two vineyards, one located in Cenlle (Spain) and other in Amares (Portugal), from 2005-2007. A volumetric trap, model Lanzoni VPPS-2000, was used for the aerobiological study. Phenological observations were conducted on 20 vines of three grape varieties in Cenlle (Treixadura, Godello and Loureira) and in Amares (Trajadura, Loureiro and Pedernã), by using the BBCH scale. The highest total spore concentrations during the grapevine cycle were recorded in 2007 in both locations (Cenlle:16,145 spores; Amares:1,858 spores), and the lowest, in 2005 in Cenlle (1,700 spores) and in Amares (800 spores) in 2006. In Cenlle, the best adjusted model was an ARIMA (0,2,2), including the relative humidity four days earlier, while in Amares there was an ARIMA (1,2,3), considering the relative humidity three days earlier and rainfall two days earlier. The t-test showed no significant difference between observed and predicted data by the model.The study was partially supported by the University of Vigo (Bolsas de Estadías en centros de Investigación)S

Self-cleaning in an estuarine area formerly affected by 226Ra anthropogenic enhancements: numerical simulations

A numerical model of the Odiel–Tinto estuary (Spain) has been developed to study the self-cleaning process that was evidenced from 226Ra measurements in water and sediments collected in the period 1999–2002, after direct releases from a fertilizer complex ceased (in 1998). The hydrodynamic model is first calibrated, and standard tidal analysis is carried out to calculate tidal constants required by the dispersion code to determine instantaneous water currents and elevations over the estuary. In this way, long-term simulations may be carried out. The dispersion code includes advective/diffusive transport of radionuclides plus exchanges with bottom sediments described through a kinetic approach. The dispersion model is first tested by comparing computed and measured 226Ra concentrations over the estuary resulting after releases in the Odiel and Tinto rivers. Next, it is applied to simulate the self-cleaning process of the estuary. The time evolution of radium concentrations in bed sediments is in generally good agreement with observations. The computed sediment halving time of the estuary is 510 days, which also is in good agreement with that estimated from measurement

Self-cleaning in an estuarine area formerly affected by 226Ra anthropogenic enhancements

The estuary of the Odiel River has been affected by both direct discharges of phosphogypsum (radium enriched industrial waste) and dissolution and weathering of the exposed piles where this radium enriched waste was stored. In 1998 the waste management policy for industries changed. The direct discharges stopped and the new phosphogypsum piles were well protected against dissolution processes, avoiding any transference of radium into the environment. This work presents a study of the evolution with time (1999–2002) of the levels of 226Ra in river water and sediment samples with the new waste management policy. A liquid scintillation technique was used to measure the 226Ra activity concentration in sediment samples. A gas-proportional counter was also used to measure the 226Ra activity concentration in river water samples. The main conclusion is that a systematic and continuous decrease of the activity concentration of 226Ra with time in the Odiel River estuary is occurring. Thus, a possible self-cleaning in the estuary, once the direct waste discharges were avoided, can be inferred