554 research outputs found

    The level of non-thermal velocity fluctuations deduced from Doppler spectroscopy and its role on TJ-II confinement

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    The goal of this investigation is to study, in the line of previous works, the level of velocity fluctuations in different scenarios of the TJ-II stellarator. The method followed consists in measuring the apparent Doppler temperature of C4+ and protons with high spectral resolution techniques with spatial resolution. The level of turbulent velocities in the plasma has been deduced from the difference observed between the apparent temperature of both species, following a method previously presented and borrowed from astrophysics. The study of this difference, as a function of plasma density and injected power, provides a way to explore if this turbulence plays any role in the confinement of the hot TJ-II plasma.Comment: 8 pages, 5 figure

    Donación de ovocitos en reproducción humana asistida. Cuidados de Enfermería

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    La esterilidad es un fenómeno que afecta a un grupo de población significativo en las sociedades modernas, lo que se traduce en una alteración del bienestar social, que genera un aumento en la demanda de atención en reproducción asistida. Las posibles causas relacionadas son múltiples, considerando el retraso de la edad de maternidad una de las principales. Los numerosos avances médicos han generado una amplia oferta de tratamientos eficaces, entre los que tradicionalmente se encuentran la inseminación artificial y la fecundación in vitro/ microinyección intracitoplasmática. A estas técnicas se han sumado otras complementarias, como la donación de gametos, que actualmente está experimentando un gran auge, constituyendo un recurso cada vez más demandado por presentar resultados realmente positivos. El acceso a estas técnicas precisa una serie de requisitos mínimos regulados por la Ley 14/2006, sobre técnicas de reproducción humana asistida, que garantiza su buen uso y determina que, antes de escoger la técnica a llevar a cabo, es necesario realizar un estudio exhaustivo de la pareja o mujer que va a realizar el tratamiento. Dentro de este ámbito, enfermería juega un papel muy importante, atendiendo no solo la esfera física, sino también la psicológica, ya que estas situaciones van acompañadas de sentimientos negativos. Enfermería debe colaborar ofreciendo el apoyo necesario para ayudar al paciente a recuperar su estabilidad emocional.Grado en Enfermerí

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    Comparison of theoretical heat transfer model with results from experimental monitoring installed in a refurbishment with ventilated facade

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    One of the main points to consider when a building is renovated is the improvement of its energy efficiency, minimizing the heat loss through the enclosures and its heating consumption. Under this scope idea a ventilated facade was designed and incorporated in an educational building located in the city of Burgos (Spain). The main objective of this document is a comparison between the theoretical model of heat transfer across the building envelope separating the environment and the interior space, and the heat intake through a linear regression model with installed experimental monitoring. For this it has been necessary to carry out an exhaustive study of the thermal transmission of each one of the materials that make up the thermal envelope of the building, as well as the linear thermal bridges that can be produced before and after the renovation. In addition, thanks to the monitoring installed in the demonstrator building, the interior and exterior temperatures and the heat consumption of each of the radiators is known. In this way expected and real energy savings have been compared
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