Search results for "Lead"
showing 10 items of 1360 documents
Gelled electrolyte for nanostructured lead-acid battery
2019
In recent years, the storage of energy produced by renewable sources has become a topic of great interest. Lead-acid batteries are widely used in this field, in particular those based on VRLA (Valve-Regulated-Lead Acid) technology, in which the electrolyte is immobilized inside the battery. In this paper, the use of a hydrogel as an electrolyte was considered. Hydrogel can be described as a three-dimensional network of a hydrophilic polymer that can absorb large amounts of water (or aqueous solutions) without dissolving. Pb and PbO2 nanostructured electrodes were used in the battery that used hydrogel as an electrolyte. Two different types of hydrogels were synthesised, both based on PVA th…
Optoelectronic devices based on caesium lead halide perovskite nanocrystals
2020
Tradicionalmente, la implementación de materiales activos en circuitos fotónicos integrados se ha basado en la utilización de semiconductores III-V y vidrios y materiales ferroeléctricos dopados con iones de tierras raras. Sin embargo, en la actualidad existe una alternativa basada en (nano) materiales sintetizados por técnicas de química coloidal. La posibilidad de procesar nanomateriales en solución permite fabricar semiconductores con propiedades ópticas (emisión, absorción, dispersión de luz) que pueden diseñarse durante la síntesis. Además, su naturaleza coloidal permite integrarlas en cualquier arquitectura óptica mediante sencillas técnicas de impresión en tinta. En este contexto, lo…
La negociación colectiva de los funcionarios públicos locales tras el Estatuto Básico del Empleado Público
2008

Pedagogical leadership to support new teachers' growth
2016
This study aims to discover the impact of pedagogical leadership on new teachers’ growth. The research is focused on three questions: 1) Are new teachers’ feelings and challenges being understood?; 2) How do new teachers receive support from principals and the school community?; and 3) How does pedagogical leadership impact new teachers’ growth? The research uses the qualitative approach of case studies. Four Finnish schools were selected as participants. The principals of each school and their five new teachers, with less than three years of experience, participated in the interviews. Teachers in Finland have common challenges when they first enter the profession. Finnish school communitie…
Panorámica de la desigualdad digital en España: operacionalización y dimensionamiento de las brechas digitales de accesibilidad, habilidades y formas…
2019
En este artículo, se realiza un análisis estadístico de la desigualdad digital en España a partir de una operacionalización de las tres brechas digitales más relevantes: (1) accesibilidad a los dispositivos TIC; (2) competencias y habilidades digitales; y (3) prácticas digitales y formas diferenciales de uso. La metodología es cuantitativa, basada en la última oleada (2018) de la encuesta sobre equipamientos tecnológicos en el hogar del INE (TIC-H), a partir de la cual se ha desarrollado un análisis comparativo por género, edad, nivel de estudios, situación laboral y tipo de hábitat residencial. Los resultados muestran cómo la desigualdad de acceso tiene actualmente más que ver con las moda…
Upward Voice: Participative Decision Making, Trust in Leadership and Safety Climate Matter
2020
A supportive upward voice environment is critical in nuclear power plants in order to provide energy in a sustainable manner. In high&ndash
Single-Center-Single-Blinded Clinical Trial to Evaluate the Efficacy of a Nutraceutical Containing Boswellia Serrata, Bromelain, Zinc, Magnesium, Hon…
2022
Some nutraceuticals have been studied as supportive treatment for fighting upper respiratory tract infection and middle ear disease. Our study aims at evaluating the effect of a specific oral supplementation in the treatment of pediatric otits media. The subjects were randomly assigned by the physician (single-blinded study) to one of three groups: Control Group (CG), Treatment Group 1 (TG1), or Treatment Group 2 (TG2). Both TG were treated with Flogostop Duo (for 20 days—TG1 or 30 days—TG2) in combination with the standard treatment, while CG underwent standard treatment only. The standard treatment was nasal aerosol with Fluticasone and Mucolytic, and nasal washing with hypertonic solutio…
Działalność animacyjna liderów Lokalnej Grupy Działania w środowisku wiejskim (przykład Śląska Opolskiego)
2016
Artykuł omawia modernizację obszarów wiejskich Śląska Opolskiego w perspektywie działań animacyjnych podejmowanych przez liderów lokalnych skupionych w Lokalnej Grupie Działania. Przeanalizowano – na podstawie badań terenowych – ich współpracę z Fundacją Euro-Country – partnerstwo dla zrównoważonego rozwoju obszarów wiejskich, która wspólnie z nimi wdraża lokalną strategię rozwoju, budując lokalne partnerstwo i integrując społeczności wiejskie wokół idei zrównoważonego i wielofunkcyjnego rozwoju.
A probabilistic long‐term framework for site‐specific erosion analysis of wind turbine blades: A case study of 31 Dutch sites
2021
Abstract Rain‐induced leading‐edge erosion (LEE) of wind turbine blades (WTBs) is associated with high repair and maintenance costs. The effects of LEE can be triggered in less than 1 to 2 years for some wind turbine sites, whereas it may take several years for others. In addition, the growth of erosion may also differ for different blades and turbines operating at the same site. Hence, LEE is a site‐ and turbine‐specific problem. In this paper, we propose a probabilistic long‐term framework for assessing site‐specific lifetime of a WTB coating system. Case studies are presented for 1.5 and 10 MW wind turbines, where geographic bubble charts for the leading‐edge lifetime and number of repai…
Co-sensing and co-shaping as shared and relational practices in bringing about relational leaders in higher education
2021
AbstractThe aim of this article is to investigate how and what kinds of relational and shared practices were co-created within a multicultural team in a higher education collaborative learning environment. The students interacted while working towards the shared goal of co-constructing knowledge. The study provides insight into how student teams can actively build collaboration in learning spaces through manifesting relational leadership. Shared and relational practices refer broadly to all the knowledge, attitudes and skills that emerge from team interaction. A compound theoretical framework combining relational leadership and leadership trichotomy was adapted to study what particular fact…