Analysis of the European Strategy for Hydrogen

This Final Degree Thesis focuses on analysing the aspirations of the European Union within the hydrogen sector. This aim is achieved through the examination of the European Parliament’s Hydrogen Strategy, allowing for a study of actions and projects in all hydrogen fields. The analysis is preceded by an exposition of the energy sector current situation and a description of the technologies associated with hydrogen, as well as an explanation of the most relevant plans and organisations that shape the rest of laws and initiatives (Paris Agreement, EU Green Deal…). It is followed by an overview of the international and Spanish hydrogen developments and the conclusions achieved. Any document that serves as a guide or strategy for any sector does inherently cover a wide range of topics so as to encompass the entirety of the sector, and this is the case for the strategy analysed. The European Parliament’s Hydrogen Strategy includes hydrogen demand, infrastructure, research and innovation, production, policies and more. This wide range of topics in the document studied implies a wide range of topics to delve into in this thesis, resulting in more than 150 information sources consulted to elaborate the thesis. The Hydrogen Strategy is crucial to understand the role of hydrogen in the EU and predict its future development. However, even though it was released about a year ago, it would already benefit from an update given that in a short period of time the energy context has changed (energy prices inflation, Russian conflict). In this situation of lack of security of supply and instability, the need for an energy carrier like hydrogen is more evident than ever. Moreover, hydrogen can be the key to the green transition and decarbonisation in the EU, which is why it is so important to keep on developing its technologies and to pursue this strategy.Este trabajo de fin de grado persigue analizar las ambiciones de la Unión Europea dentro del sector del hidrógeno. Este objetivo se alcanza a través del análisis de la Estrategia Europea para el Hidrógeno presentada por el Parlamento Europeo, que además permite que el estudio abarque todos los campos del sector del hidrógeno. El análisis es precedido por una contextualización del sector energético actual y por una descripción de las tecnologías del hidrógeno (para producción, transporte, almacenamiento, usos…), y también por una explicación de los planes y organizaciones más relevantes y que da forma al resto de leyes e iniciativas (Acuerdo de París, EU Green Deal…). Al análisis le sigue un resumen del desarrollo en materia de hidrógeno a nivel internacional y nacional (español), y finalmente las conclusiones obtenidas. Cualquier documento que cumpla el papel de guía o estrategia para un determinado sector abarca inherentemente un amplio abanico de temas para reflejar el sector al completo, y este es el caso de la estrategia que se analiza. La Estrategia Europea para el Hidrógeno incluye temas como la demanda de hidrógeno, infraestructura, investigación e innovación, producción, políticas, etc. Este amplio rango de temas del documento estudiado implica un amplio rango de temas que explorar en este trabajo de fin de grado, lo cual ha resultado en la consulta de más de 150 fuentes de información para la elaboración del trabajo. La Estrategia para el Hidrógeno es crucial para comprender el papel del hidrógeno en la UE y predecir su desarrollo en el futuro. Sin embargo, aunque fue publicada hace alrededor de un año, ya necesitaría una actualización para poder incluir los cambios del contexto energético que han tenido lugar en este corto periodo de tiempo (inflación en los precios de la energía, conflicto con Rusia…). Dada esta situación de falta de seguridad de suministro e inestabilidad, la necesidad de contar con un vector energético como el hidrógeno es más evidente que nunca. Además, el hidrógeno puede ser clave en la transición verde y descarbonización de la UE, por lo que es muy importante continuar desarrollando las tecnologías del hidrógeno y cumplir esta estrategia.Universidad de Sevilla. Grado en Ingeniería de la Energía (UMA/USE

Celos y envidia en el trabajo: una revisión de los últimos 20 años

No cabe duda que las organizaciones pueden verse afectadas por las respuestas afectivas de sus miembros, y que el modo en que se gestionen estas respuestas influirá de manera decisiva en su desempeño laboral. Dos de las emociones que influyen de manera directa en el rendimiento son los celos y la envidia. El presente artículo tiene como objetivo realizar una revisión bibliográfica de los últimos 20 años sobre los celos y la envidia en el ámbito laboral. Tras una búsqueda exhaustiva de 41 artículos relevantes, se procedió a explorar las principales definiciones dadas, los métodos de medida utilizados para su evaluación y las variables antecedentes y consecuentes con las que se han relacionado estas dos emociones. Para terminar, se presentan las limitaciones de estos estudios y las propuestas de futuro para este campo de investigación. Los resultados apuntan que las futuras investigaciones deberían centrarse en el estudio de las variables moduladoras entre los celos y la envidia, además de tener en cuenta la utilización de metodología cualitativa y los estudios longitudinales.There is no doubt that organizations may be affected by the emotional responses of its members, and how these responses are handled decisively influence on job performance. Two of the emotions that have a direct bearing on performance are jealousy and envy. This paper aims to conduct a literature review of the last 20 years about jealousy and envy in the workplace. After an exhaustive search of 41 relevant articles, we proceeded to explore the main definitions given, the measurement methods used for evaluation and the antecedent and consequent variables which have related these two emotions. Finally, the limitations of these studies and proposals for the future of this research are presented. The results suggest that future research should focus on the study of moderator variables between jealousy and envy, while taking into account the use of qualitative methodology and longitudinal studies

On nonparaxial nonlinear Schrödinger-type equations

In this paper the one-dimensional nonparaxial nonlinear Schrödinger equation is considered. This was proposed as an alternative to the classical nonlinear Schrödinger equation in those situations where the assumption of paraxiality may fail. The paper contributes to the mathematical properties of the equation in a two-fold way. First, some theoretical results on linear well-posedness, Hamiltonian and multi-symplectic formulations are derived. Then we propose to take into account these properties in order to deal with the numerical approximation. In this sense, different numerical procedures that preserve the Hamiltonian and multi-symplectic structures are discussed and illustrated with numerical experiments

Editorial: Methodological issues in psychology and social sciences research

In recent decades, the classical methods of studying the psychometric properties of tests have advanced to evolve into new innovative statistical methods, which allows obtaining a new view of the data. In this sense, progress has been made in the use of item response theory and in the use of structural equation models. Likewise, classical statistical inference methods have advanced in hypothesis testing and Bayesian statistics is rapidly making its way both in experimental studies and in psychometric studies. The aim of this issue has been to contribute to the dissemination of new research methodologies in quantitative and qualitative analysis in Psychology, as well as to evaluate the effectiveness and advantages of the new methods compared to classic psychometric tools and methods. Manuscripts on methodological issues of current interest, meta-analyses or systematic reviews, articles that introduce new applications on various procedures used in solving problems in Psychology, and reviews of statistical software have been welcomed. Likewise, researchers from other areas were invited to make presentations in which the relevance for psychology of the procedures developed in other fields could be verified. In this issue, 17 manuscripts have been submitted, of which 12 have been accepted. A total of 34 authors have participated in this special issue. We can see that four types of manuscripts have been published: (1) Development of scales and psychometric validation studies, (2) Theoretical and/or opinion articles, (3) Simulation studies, and (4) Systematic reviews or meta-analysis

Psychometric Properties and Measurement Invariance by Gender of the Abbreviated Three-Item Version of the Satisfaction with Life Scale in a Colombian Sample

(1) Background: The need to offer brief scales with items that can be answered with few response options is increasingly important in order to be able to access a broad range of the population. The three-item version of Diener's Satisfaction with Life Scale has recently been proposed. The objective of this study is to study the psychometric properties of the three-item version of this Scale with five response options, as well as the measurement invariance by gender, in a Colombian sample; (2) Methods: A confirmatory factor model of the three items of the scale together with the Flourishing Scale has been tested, and the measurement invariance by gender of the model has been studied. The results offer a very satisfactory fit of the model, showing good evidence of construct and criterion validity, good indicators of reliability and measurement invariance by gender; (4) Conclusions: The three-item version of the Life Satisfaction Scale, previously adapted to the Colombian population with five response options, is presented as a valid and reliable measurement tool. In future studies, it would be convenient to study the test-retest reliability, as well as its psychometric properties in different samples and at a cross-cultural level

Psychometric properties and measurement invariance of the Vaccination Attitudes Examination Scale (VAX) in a Spanish sample

In these times of pandemic, the acceptance or rejection of vaccines has become increasingly clear, with a considerable rise in the anti-vaccine movement in Spain. It is important to understand the attitudes that lead a person to refuse vaccination in order to develop more effective public health campaigns. The objective of this study has been to study the psychometric properties and measurement invariance of the Vaccination Attitudes Examination (VAX) scale in a Spanish sample. Confirmatory factor analysis and structural equation modelling have been used to study the psychometric properties of the VAX. Likewise, the measurement invariance by gender and educational level has been studied. The structure of four related factors for VAX is confirmed, as well as its predictive value, since the factor 'trust in the benefit of the vaccine' clearly predicts the choice to be vaccinated. The strong measurement invariance by gender and educational level is also confirmed. The comparison of latent means between groups indicates that there are no differences by gender in any factor. However, people with a high educational level present higher scores in factors 'concern about unforeseen future effects', 'concern about commercial effects and speculation' and 'preference for natural immunity'. The VAX is presented as a reliable and valid tool to assess four different factors related to attitudes towards vaccines in Spain. Future studies of its cross-cultural invariance may help to determine the main factors that lead people not to be vaccinated in order to develop more effective public health campaigns

Nociones sobre el concepto de inconsciente en las obras de P. Janet y S. Freud

Fac. de MedicinaTRUEProQuestpu

Nociones sobre el concepto de inconsciente en las obras de P. Janet y S. Freud

Fac. de MedicinaTRUEProQuestpu