221 research outputs found
Application of Particle Swarm Optimization to Formative E-Assessment in Project Management
No full textThe current paper describes the application of Particle Swarm Optimization algorithm to the formative e-assessment problem in project management. The proposed approach resolves the issue of personalization, by taking into account, when selecting the item tests in an e-assessment, the following elements: the ability level of the user, the targeted difficulty of the test and the learning objectives, represented by project management concepts which have to be checked. The e-assessment tool in which the Particle Swarm Optimization algorithm is integrated is also presented. Experimental results and comparison with other algorithms used in item tests selection prove the suitability of the proposed approach to the formative e-assessment domain. The study is presented in the framework of other evolutionary and genetic algorithms applied in e-education.Particle Swarm Optimization, Genetic Algorithms, Evolutionary Algorithms, Formative E-assessment, E-education
Agencias de colocación. Análisis actual en la Comunidad Valenciana
No full textTreball de Final de Grau en Relacions Laborals i Recursos Humans. Codi: RL0947. Curs acadèmic 2015-201
Hybrid and Dual Chemistry Battery for Energy Storage Applications
No full textEnergy storage is predicted to play an increasing role in a renewable energy future. There is a wide range of storage technologies available, with different technical characteristics, to assist the renewable transition. Hybrid options are also possible to improve the technical and economic performance of storage systems. The technology proposed in this work is the directly connected hybrid lead-acid and Li-ion battery storage system, which makes use of Li-ion's high-performance characteristics and the low-cost, lower specifications of lead-acid cells. The work presented in this thesis answers the following key questions, which also summarise the novelty of this research:•What are the hybrid characteristics of directly coupled, hybrid Li-ion (NMC) and lead-acid (VRLA) systems?•Can the instantaneous hybrid behaviour be modelled using equivalent circuits?•How do hybrid battery systems perform over time in real-world applications? •What storage applications are best suited for hybrid lead-acid and Li-ion systems, and what are the associated techno-economic parameters? To answer these questions, I have built and tested hybrid systems, developed battery models, and monitored the first commercial hybrid lead-acid and Li-ion system installed in the UK. The lab analysis, done for five domestic-size hybrid systems of 24V and 48V, provides details about the system efficiency and energy flows in a hybrid configuration. The round-trip efficiency drops from a maximum of around 94-95% in the first charge/discharge stages, when only Li-ion strings are active, to 82-90%, depending on the lead-acid strings' depth of discharge. The most important parameters in the round-trip efficiency function are the kWh capacity ratio between the two chemistries, the energy available and the charge/discharge current. The energy transfer between the strings, caused by the transient currents, is negligible when only Li-ion is active, and increases with the lead-acid depth of discharge.A hybrid equivalent circuit battery model was built to predict the experimental results. The model approximates the dynamic effects of energy transferred between the strings with an accuracy of 90%, except when the lead-acid strings are discharged to 10-30% depth of discharge. The overall efficiency, the total energy discharged, and the Li-ion energy available for independent cycling can be predicted with above 90% accuracy. The demonstrator project data shows that the hybrid system is stable over time, the average operating round-trip efficiency in real-world applications is 90%, and the lead-acid degradation in hybrid configurations is around 1.3% per year. The energy transfer between the strings, due to different dynamic time constants of the two chemistries, depends on the charge stopping points, and to a lesser extent, on the discharge interruption depth of discharge. For the analysed system, the average Li-ion to lead-acid energy transfer during the charging process is 13 kWh, 5.5% of the total charged energy. The average lead-acid to Li-ion energy transfer during discharge is 5.2 kWh, 2.47% of the total discharged energy. The final techno-economic analysis shows that the hybrid battery system can be used for renewable storage applications, dedicated to serving residential, commercial, industrial, and off-grid EV charging load profiles, but it is not suitable for front-of-the-meter applications, which operate in frequency response or balancing markets. The cost-saving potential for using hybrid Li-ion and lead–acid systems varies with the load profile, storage operational strategy, and renewable overgeneration design choices. The total system cost reduction can be up to 26.1% when compared with full Li-ion solutions. However, for the cost-optimised energy solutions, the CAPEX reduction using hybrid storage is between 1.4% and 12.7%, depending on the percentage cost of storage as a share of the total energy system. The minimum cost ratio between Li-ion and lead-acid, beyond which the hybrid storage system is no longer justified, is between 1.1 and 1.5
Supporting Urban Innovators’ Reflective Practice
No full textOver the past years, a growing number of local initiatives are generating solutions for societal challenges in their cities. However, the scale and complexity of these challenges force urban innovators to constantly adapt and learn, having to acquire new capabilities that will help them advance towards systemic change. In the current work, we take the premise that these urban innovators need to be able to utilise the urban context as a learning ecosystem in order to push their interventions beyond the boundaries of small innovative niches. In keeping with Schön’s reflective practice, we envisage reflection as a core competence for these urban change makers to grow and present a reflective process supporting urban innovators in framing their professional learning journey to succeed in their projects. A series of online sessions have been conducted to investigate how to scaffold a reflective process enabling innovators to better identify challenges in their projects and the corresponding capabilities they need to acquire. In the proposed paper, we present reflective activities as a tool supporting urban innovators in self-defining their learning journeys and elaborate on the insights gained. It can be concluded that the reflective process we developed was valuable to urban innovators in unveiling new learning needs for their projects, while further research is needed to more effectively translate these learnings into actionable steps to sustain innovators’ self-development.Accepted Author ManuscriptDesign Conceptualization and Communicatio
Is high sensitivity a risk factor for mental health?
No full textTreball Final de Grau en Psicologia. Codi: PS1048. Curs: 2019/202
Las violencias sufridas por las mujeres víctimas de la trata
No full textTreball Final de Màster Universitari en Psicologia General Sanitària. Codi: SBF018. Curs acadèmic: 2023/2024En el presente trabajo de revisión sistemática, se pretende analizar los estudios realizados
en los últimos 15 años, con el fin de proporcionar una visión actual de la naturaleza de
las violencias que sufren las mujeres que son víctimas de trata con fines de explotación
sexual. Se ha llevado a cabo una búsqueda exhaustiva en diferentes fuentes de
información, tras la cual, 10 estudios fueron elegidos para su análisis.
Los resultados preliminares hallados, ponen de manifiesto que las violencias más notorias
que sufren las mujeres víctimas de trata son: violencia sexual y física, homicidios, acceso
limitado a los servicios sanitarios, infecciones de transmisión sexual, ectopia cervical, en
aquellas mujeres que fueron víctimas de trata siendo menores de edad, prácticas de
stealthing por parte de los clientes, incitación y coacción para el consumo de alcohol por
parte de clientes y proxenetas, entre otras violencias.The aim of this systematic review is to analyze the studies carried out in the last 15 years,
in order to provide a real view of the nature of the violence suffered by women who are
victims of human trafficking for the commercial sex work. An exhaustive search of
different sources of information was carried out, after which 10 studies were selected for
analysis.
Preliminary results show that the most significant forms of violence suffered by trafficked
women are: sexual and physical violence; homicides; limited access to health services;
sexually transmitted infections; cervical ectopia, in women who were trafficked as
minors; stealthing practices; incitement and coercion to consume alcohol by clients and
pimps, among other forms of violence
Mindfulness and work stress
No full textTreball Final de Grau en Administració d'Empreses. Codi: AE1049. Curs 2018-201
RaceStyle: Revista de disseny i arts visuals sobre el motorsport
No full text[ES] RaceStyle es una revista especializada en diseño y arte visual en el motorsport. El proyecto surge de la inquietud por la ausencia de valorización y reconocimiento de los artistas que permanecen ocultos tras sus obras en el mundo de las carreras. Con un enfoque divulgativo y cultural, se busca educar, concienciar y sensibilizar al público sobre la importancia y el valor de los artistas. La revista publica números centrados en temas específicos del diseño y arte visual, destacando distintas formas de expresión como la ilustración, el diseño gráfico, el modelado 3D, la fotografía, la cinematografía y la pintura. La publicación de los números se caracteriza por incluir elementos de soporte complementarios según el formato en el que el lector se interese, ofreciendo contenido en formato físico como digital. Asimismo, las publicaciones se complementan con material adicional disponible en redes sociales y en su página web.[EN] RaceStyle is a magazine specialized in design and visual art in motorsport. The project was born from the concern about the lack of appreciation and visibility of artists who remain hidden behind their works in the world of racing. With an informative and cultural approach, it seeks to educate and sensitize the public about the importance and value of artists. The magazine publishes issues focused on specific themes of visual art, highlighting various forms of expression such as illustration, graphic design, 3D modeling, photography, cinematography and painting. The publication of the issues is characterized by including complementary support elements depending on the format in which the reader is interested, offering content in both physical and digital formats. Furthermore, the publications are complemented by additional material available on social networks and the website.Bejan Dascalu, EA. (2025). RaceStyle: Revista de diseño y artes visuales sobre el motorsport. Universitat Politècnica de València. https://riunet.upv.es/handle/10251/219852TFG
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