1,189 research outputs found

    Investigation on the structural and magnetic properties of sputtered TbFe2/Fe3Ga heterostructures

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    We have analyzed the structural and magnetic properties of as-grown and annealed [TbFe2/Fe3Ga]n heterostructures grown by sputtering. Evidence of the bcc structure in the Fe3Ga layers has been found. The diffraction peak related to this structure shifts to high angles with the annealing temperature. Also, we have observed a change in the microstructure of the Tb-Fe layers when the thickness layer is reduced in the as-grown heterostructures. Moreover, the Tb content is lower than 33% of the TbFe2 Laves phase and it depends on the layer thickness. The thermal treatments promote the increase of the Tb content, but only in the heterostructures with thick layers. The strong lattice mismatch between the Tb-Fe and Fe-Ga layers seems to prevent a complete Tb diffusion upon the annealing process. Thus, the crystallization of the TbFe2 Laves phase is inhibited in the heterostructures with thin layers, although our experimental results indicate the presence of potential magnetostrictive TbFeGa alloy

    La empresa en la Web 2.0. J. Celaya. Barcelona: Gestión 2000. 2009 [286 páginas]

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    Texto dispoñible en galego e españolNO

    Open innovation in Extremadura´s tourism enterprises as a tool to enter the business tourism

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    Una de las claves para el impulso del desarrollo de actividades turísticas en ciertas regiones es la articulación de estrategias comunes en el campo del conocimiento y la innovación tecnológica, que permitan aprovechar los recursos propios de dichas regiones. El modelo de innovación abierta supone un camino alternativo y/o complementario a la gestión del conocimiento en sus distintas etapas, cuestionado la validez de algunas de las estrategias y procesos imperantes en innovación tecnológica. Las fuentes de ideas externas para este modelo abierto son diversas, desde clientes, proveedores o socios en una joint-venture, hasta universidades o centros de investigación. Estas nuevas comunidades de innovación representan un nuevo contexto social en el que generar innovaciones y conocimiento. Este estudio evalúa la utilidad de la aplicación de la innovación abierta en los procesos y toma de decisiones de las empresas turísticas extremeñas, como herramienta facilitadora en la entrada en el mercado del turismo de negocios, congresos e incentivos.A key role for the development of tourism activities in some regions is the articulation of common strategies in the fi eld of knowledge and technological innovation to harness the resources of these regions. The model of open innovation represents an alternative/complementary path for knowledge management and the proposal of new strategies in the development of projects in different areas. The sources for external ideas for this open model are diverse, ranging from clients, suppliers or partners in a joint venture, to universities or research centres. This paper evaluates the usefulness of the application of open innovation in the processes and decision-making of Extremadura’s tourism enterprises as a tool to facilitate entry into the new market of business, meetings, and incentives tourism

    Open innovation: a preliminary model from the Knowledge-based Theory

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    Objeto: El modelo de innovación abierta supone un camino alternativo y/o complementario a la gestión del conocimiento en sus distintas etapas, cuestionado la validez de algunas de las estrategias y procesos imperantes en innovación tecnológica. La nueva lógica del proceso innovador, reconoce el valor de la difusión del conocimiento a través de nuevas comunidades de innovación y considera prioritario el acceso a los conocimientos desarrollados por los miembros de dichas comunidades. El presente trabajo pretende contribuir a la construcción de un modelo integrado de factores clave de éxito en los procesos de innovación abierta. Se analiza para ello el papel que determinadas decisiones de gestión de conocimiento tienen en los resultados de los proyectos de innovación abierta, al facilitar el proceso de cambio y generar nuevas capacidades necesarias. Diseño/metodología: A través de la revisión la literatura teórica y empírica, se plantean –desde un enfoque exploratorio– las principales variables relacionadas con el funcionamiento de los sistemas abiertos de innovación, y se establecen diferentes proposiciones acerca del sentido e intensidad de tales relaciones. Resultados: La gestión del proyecto de innovación abierta mejora a través de tres factores externos: el liderazgo técnico basado en la experiencia, el empleo intensivo de las TICs, que permite alcanzar una comunicación multilateral, y la existencia de agentes intermedios o facilitadores con un marcado carácter neutral. Los resultados también dependen de ciertos factores internos: los puestos de enlace, las rutinas de búsqueda, el establecimiento de sistemas de incentivos que fomenten la proactividad y la cultura organizativa. Valor añadido: Ante la falta de propuestas completas que orienten la toma de decisiones eficaces relativas tanto a la gestión de las relaciones entre las organizaciones, como a los factores inherentes a cada una de ellas, el presente trabajo propone un modelo exploratorio que integra los factores clave de éxito en los procesos de innovación abierta.Peer Reviewe

    Analysis of the problems generated by the adaptation of teaching caused by Covid-19: Proposal for a new learning framework

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    [EN] After the pandemic crisis caused by Covid-19, we can affirm that the future will increasingly rely on remote methodologies and will most likely continue with hybrid or blended teaching, combining online and face-to-face classes. Article 9 of Spanish Royal Decree 463/2020 ordered the suspension of presential educational activity at all levels in Spanish territory, as it was recommended that distance and online teaching be used whenever possible. Due to these quarantines, education authorities have been forced to modify teaching methods and methodologies in a short period, using existing technological and human resources. Students and teachers have found themselves in a new educational scenario very quickly and traumatically, without being prepared on most occasions. This paper presents a systematic literature review of the main national and international journals in the Web of Sciences, with the aim of finding out the main problems that the academic community has faced with the rapid adaptation of presential teaching to online or blended teaching. We can conclude that this expeditious change has caused problems that can be derived from (1) technical or infraestructure, (2) psychological and/or (3) formative and normative aspects. We are talking about a new learning framework that involves changes in the knowledge to be applied -pedagogical and technological-, in the didactics used -more collaborative and active- and in the context in which it is carried out -virtualisation of the environment and use of social networks-.Alonso-Muñoz, S.; González-Sánchez, R.; Torrejón-Ramos, M. (2022). Analysis of the problems generated by the adaptation of teaching caused by Covid-19: Proposal for a new learning framework. En Proceedings INNODOCT/21. International Conference on Innovation, Documentation and Education. Editorial Universitat Politècnica de València. 101-110. https://doi.org/10.4995/INN2021.2021.1339110111

    Usage of Computer Media among the Students of Pedagogy (University of La Laguna)

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    El objetivo es conocer el perfil del estudiante de nuevo ingreso del Grado de Pedagogía (Universidad de La Laguna), así como sus conocimientos, usos y actitudes hacia el medio informático. Permitirá establecer objetivos reales en la metodología docente de la asignatura de Iniciación a la Economía de la Educación. Se cumplimentaron 272 cuestionarios. Se aplicó un análisis multivariante ALSCAL para determinar el grado de similitud entre el perfil del estudiante y el uso del ordenador. Un resultado destacado es el que asocia formación informática con diversificación del uso del ordenadorThe present work aims to know the students, in first year of the Degree of Pedagogy (University of La Laguna), knowledge profile, practices and attitudes toward computer media. This will allow to establish realistic teaching methodology in the course Introduction to Economics of Education. 272 questionnaires were completed. We applied an ALSCAL multivariate analysis in order to determine the degree of similarity between student profile and computer usage. A remarkable result is that student computing training is associated with a diversified usage of computers

    The Key Role of Emotional Repair and Emotional Clarity on Depression among Breast Cancer Survivors

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    Breast cancer is the malignancy with the highest incidence in women worldwide. The empirical evidence is inconsistent with the prevalence of depression among breast cancer survivors (BCS), pointing to emotional competencies as protective factors against affective disorders. However, the mechanisms through which these competencies favor a more adaptive emotional state are unknown. Therefore, this study aims to explore the relationship between the experience of having survived the disease and depression levels in a group of BCS, and the mediating role of Perceived Emotional Intelligence (PEI) in this relation. This was a cross-sectional study with 237 women divided into two groups: 56 BCS and 181 healthy controls who completed the Trait Meta-Mood Scale 24 (TMMS-24) and the Hospital Anxiety and Depression Scale (HADS). Results showed that Survivorship and PEI explained and predicted 37.8% of the variance of depression, corresponding the 11.7% to the direct and/or the indirect effect of the PEI dimensions (Emotional Attention, Emotional Clarity, and Emotional Repair). In conclusion, interventions aimed at promoting an adequate PEI in this population-and in the Psycho-oncology field, in general-with a particular focus on the development of Emotional Clarity and Repair need to be implemented. Limitations and future research lines are discussed

    Single and Combined Associations of Plasma and Urine Essential Trace Elements (Zn, Cu, Se, and Mn) with Cardiovascular Risk Factors in a Mediterranean Population

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    Trace elements are micronutrients that are required in very small quantities through diet but are crucial for the prevention of acute and chronic diseases. Despite the fact that initial studies demonstrated inverse associations between some of the most important essential trace elements (Zn, Cu, Se, and Mn) and cardiovascular disease, several recent studies have reported a direct association with cardiovascular risk factors due to the fact that these elements can act as both antioxidants and pro-oxidants, depending on several factors. This study aims to investigate the association between plasma and urine concentrations of trace elements and cardiovascular risk factors in a general population from the Mediterranean region, including 484 men and women aged 18–80 years and considering trace elements individually and as joint exposure. Zn, Cu, Se, and Mn were determined in plasma and urine using an inductively coupled plasma mass spectrometer (ICP-MS). Single and combined analysis of trace elements with plasma lipid, blood pressure, diabetes, and anthropometric variables was undertaken. Principal component analysis, quantile-based g-computation, and calculation of trace element risk scores (TERS) were used for the combined analyses. Models were adjusted for covariates. In single trace element models, we found statistically significant associations between plasma Se and increased total cholesterol and systolic blood pressure; plasma Cu and increased triglycerides and body mass index; and urine Zn and increased glucose. Moreover, in the joint exposure analysis using quantile g-computation and TERS, the combined plasma levels of Zn, Cu, Se (directly), and Mn (inversely) were strongly associated with hypercholesterolemia (OR: 2.03; 95%CI: 1.37–2.99; p < 0.001 per quartile increase in the g-computation approach). The analysis of urine mixtures revealed a significant relationship with both fasting glucose and diabetes (OR: 1.91; 95%CI: 1.01–3.04; p = 0.046). In conclusion, in this Mediterranean population, the combined effect of higher plasma trace element levels (primarily Se, Cu, and Zn) was directly associated with elevated plasma lipids, whereas the mixture effect in urine was primarily associated with plasma glucose. Both parameters are relevant cardiovascular risk factors, and increased trace element exposures should be considered with caution.Instituto de Salud Carlos IIISpanish Government Spanish Government CIBER 06/03 SAF2016-80532-RJunta de Andalucia AGR145Center for Forestry Research & Experimentation (CIEF)European Commission PROMETEO2017/017 APOSTD/2019/136 PROMETEO/2021/021ERDF A way of making EuropeAEI PID2019-108858RB-I0

    Analysis of the use of the technology in the museums: intelligent museums. Case studies in the city of Madrid

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    La cultura es un campo de oportunidades para las nuevas tecnologías, el reto está en conseguir una simbiosis positiva de ello y no acabar perturbando la experiencia cultural. En el estudio de esta relación cabe destacar como las tecnologías pueden afectar a la visita de un museo. El presente artículo analiza el papel actual de las nuevas tecnologías en los museos y el uso y aceptación de sus usuarios. A través de una revisión de la literatura sobre el empleo de las tecnologías en la actividad de los museos y la realización de una encuesta a los visitantes y algunos trabajadores del sector de los museos de la Comunidad de Madrid, nos permite afirmar un apoyo y atracción de los usuarios hacia las tecnologías y un amplio conocimiento de los avances tecnológicos. De esta atracción puede derivarse el incremento del uso de la tecnología en los museos y su rápida introducción.Culture is a field of opportunity for new technologies, the challenge is to achieve a positive symbiosis of this and not to end up disrupting the cultural experience. In the study of this relationship, it is worth noting how technologies can affect a museum visit. This article analyses the current role of new technologies in museums and the use and acceptance of their users. Through a review of the literature on the use of technologies in museum activities and a survey of visitors and some workers in the museum sector in the Community of Madrid, we are able to confirm that users support and are attracted to technologies and have a broad knowledge of technological advances. This attraction may lead to an increase in the use of technology in museums and its rapid introduction
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