973 research outputs found

    Sangre y sexo en el cine de terror español

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    En un contexto sociopolítico donde nada escapaba a los ojos del censor, se desarrolló un tipo de cine que hoy en día sorprende por su crudeza sanguinolenta, así como por sus excesos sexuales. El desdén de la censura por el cine de terror español producido en las décadas de los sesenta y setenta permitió que se convirtiera en el espacio idóneo donde los espectadores de laépoca encontraron la válvula de escape a la represión a la que estaban sometidos. La muerte del general Francisco Franco y el aperturismo provocaron que las ansiedades eróticas de un buennúmero de espectadores se centraran en otro tipo de cine. Sin embargo, ese corto pero intenso periodo de tiempo, caracterizado por una altísima producción de género terrorífico, ha legado imágenes con una gran carga erótica, sexual y violenta, muy desconocidas, que merecen ser rescatadas. Para ello, haremos un repaso histórico por el género en España para, finalmente, centrarnos en el análisis de cuatro filmes representativos de los setenta.Abstract:A rawness and crudity cinema was developed in Spain, in a socio-political context where everything was always subject to censorship, through the sixties and seventies. Still today, thisbloody and erotic cinema may cause surprise to the audience. Censorship showed a scornful attitude to this cinema, and spectators considered it as a release-valve, due to the repressionthey were suffered. This fact permitted an intense production of this kind of movies in a really short time. The death of Francisco Franco and the brand new openness caused that all this audiencefocused their attention in another kind of cinema. Nevertheless, that brief but extremely intense period allowed us to enjoy those erotical and violent images, that today remains almost unknown,and, withouth a doubt, it deserves to be rescued. For that, we will make a skim though this genre in Spain and, eventually, we will analyze four emblematic films of the seventies

    An optimization tool to design the field of a solar power tower plant allowing heliostats of different sizes

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    The design of a Solar Power Tower plant involves the optimization of the heliostat field layout. Fields are usually designed to have all heliostats of identical size. Although the use of a single heliostat size has been questioned in the literature, there are no tools to design fields with heliostats of several sizes at the same time. In this paper, the problem of optimizing the heliostat field layout of a system with heliostats of different sizes is addressed. We present an optimization tool to design solar plants allowing two heliostat sizes. The methodology is illustrated with a particular example considering different heliostat costs.Ministerio de Economía y CompetitividadJunta de AndalucíaGobierno VascoUnión Europe

    Optimization of multiple receivers solar power tower systems

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    In this article a new procedure to optimize the design of a Multiple Receivers Solar Power Tower system is presented. The proposed procedure allows to optimize the different receivers (height, aperture tilt angle, azimuth angle and aperture size) as well as the heliostat field layout, seeking to minimize the levelized cost of thermal energy. The optimization problem is high dimensional, with a black-box nonconvex objective function that is hard to compute. Our method is based on an alternating greedy-based heuristic method, already used by the authors to design a system with a single receiver, which simultaneously optimizes the receivers and the heliostat field. The proposed procedure allows one to determine the overall number of heliostats, their locations and the aiming region of each field.Abengoa Solar New TechnologiesInstituto de Matemáticas de la Universidad de SevillaMinisterio de Ciencia e InnovaciónMinisterio de Economía y CompetitividadJunta de AndalucíaEuropean Unio

    A heuristic method for simultaneous tower and pattern-free field optimization on solar power systems

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    A heuristic method for optimizing a solar power tower system is proposed, in which both heliostat field (heliostat locations and number) and the tower (tower height and receiver size) are simultaneously considered. Maximizing the thermal energy collected per unit cost leads to a difficult optimization problem due to its characteristics: it has a nonconvex black-box objective function with computationally expensive evaluation and nonconvex constraints. The proposed method sequentially optimizes the field layout for a given tower configuration and then, the tower design is optimized for the previously obtained field layout. A greedy-based heuristic algorithm is presented to address the heliostat location problem. This algorithm follows a pattern-free method. The only constraints to be considered are: the field region and the nonconvex constraints (which allow heliostats to not collide). The absence of a geometrical pattern to design the field and the simultaneous optimization of the field and the tower designs make this approach different from the existing ones. Our method is compared against other proposals in the literature of heliostat field optimization.Abengoa Solar New TechnologiesInstituto de Matemáticas (Universidad de Sevilla)Ministerio de Economía y CompetitividadJunta de AndalucíaEuropean Cooperation in Science and Technolog

    Helios 3198 solar simulator adaptation for the characterization of LCPV prototypes

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    This paper covers the adaptation and experimental verification that has been carried out to the Helios 3198 solar simulator to use it in the characterization of a LCPV prototype. The challenge is to deal with the diffuse light that can distort the measurement of a LCPV prototype because of the larger acceptance angle. A deflector chamber for the flash lamp has been designed and implemented to capture this diffuse light. The experimental verification has proven the reliability of the solution, demonstrating that the inclusion of this element in the equipment is not modifying the spatial uniformity and the angular distribution of the light at the receiver plane. Therefore, this work demonstrates that the Helios 3198 solar simulator, including a deflector chamber for the lamp, can be used for the characterization of a LCPV prototype

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    Balanced plankton net community metabolism in the oligotrophic North Atlantic subtropical gyre from Lagrangian observations

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    Characterization of the microbial plankton metabolism in oligotrophic oceans is of relevance for the quantification of the global carbon balance; however whether the plankton community metabolism in oligotrophic gyres is net autotrophic or heterotrophic is still under debate. Discrepancies have been in part attributed to the difficulties of the standard snapshot estimations, based on in vitro measurements, to adequately represent the temporal scale of trophic processes. This work presents concurrent measurements of gross primary production and community respiration carried out in the North Atlantic Oligotrophic Gyre throughout two 7-day Lagrangian experiments that allowed us to investigate the effect of short term (daily) variability on the microbial metabolism quantification. Physicochemical and biological variables showed a low variability in each Lagrangian experiment and a balanced net plankton metabolism was found in 83% of the sampling days.Ministerio de Educación y Ciencia | Ref. REN2003-09532-C03-0

    Importance of N2 fixation vs. nitrate diffusion along a latitudinal transect in the Atlantic Ocean

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    We present ocean, basin-scale simultaneous measurements of N2-fixation, nitrate diffusion, and primary production along a south–north transect in the Atlantic Ocean crossing three biogeographic provinces: the south subtropical Atlantic (SSA; , 31uS–12uS), the equatorial Atlantic (EA; , 12uS–16uN), and the north subtropical Atlantic (NSA, , 16uN–9uN) in April–May 2008. N2-fixation and primary production were measured as 15N2 and 14C uptake, respectively. Dissipation rates of turbulent kinetic energy (e) were measured with a microstructure profiler. The vertical input of nitrate through eddy diffusion was calculated from the product of diffusivity, derived from e, and the gradient of nanomolar nitrate concentration across the base of the euphotic zone. The mean N2-fixation rate in EA was 56 6 49 mmol N m22 d21, whereas SSA and NSA had much lower values (, 10 mmol N m22 d21). Because of the large spatial variability in nitrate diffusion (34 6 50, 405 6 888, and 844 6 1258 mmol N m22 d21 in SSA, EA, and NSA, respectively), the contribution of N2-fixation to new production in the SSA, EA, and NSA was 44% 6 30%, 22% 6 19%, and 2% 6 2%, respectively. The differences between SSA and NSA in the contribution of N2 fixation were partly due to the contrasting seasonal forcing in each hemisphere, which likely affected both N2 fixation rates and vertical nitrate diffusion. The variability in the nitrogen budget of the Atlantic subtropical gyres was unexpectedly high and largely uncoupled from relatively constant phytoplankton standing stocks and primary production rates.CTM2004-05174-C02 CTM2007-28295-E/MAR Programa I. Parga-Ponda

    Ambiente virtual Estatística em Saúde como ferramenta didática para fortalecer a educação a distância em Enfermagem

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    The knowledge society has caused changes in the way knowledge is generated and transmitted; That is why the role of the university today is to provide learning in students in correspondence with the economic, cultural and social development of each country. For this reason, the virtual environment Health Statistics was designed as a didactic tool to strengthen distance education in Nursing. A development research was carried out between September 2018 and June 2020 at the Faculty of Medical Sciences of Bayamo "Efraín Benítez Popa. To develop the virtual learning environment, the Moodle platform was used. For the design and evaluation of the software, a configuration of RUP (for its acronym, Rational Unified Process), the Delphi method and the Kendall coefficient of agreement W were used. A tool was implemented that allows teachers to manage online virtual courses to support face-to-face teaching. Its design provides ease of use and management, allows the administration of user profiles, the management of activities and resources of the created courses, and the administration of the site. The software developed is a flexible didactic tool oriented to the user for the management of the basic contents of Health Statistics and responds to the needs of the model of the teaching-learning process of this subject. La sociedad del conocimiento ha provocado cambios en la forma de generar y trasmitir el conocimiento; es por esto que el papel de la universidad hoy es proporcionar aprendizajes en los estudiantes en correspondencia con el desarrollo económico, cultural y social de cada país. Po tal motivo se diseñó el entorno virtual Estadística Sanitaria como herramienta didáctica para fortalecer la educación a distancia en Enfermería. Se realizó una investigación de desarrollo entre septiembre de 2018 a junio de 2020 en la Facultad de Ciencias Médicas de Bayamo “Efraín Benítez Popa. Para desarrollar el entorno virtual de aprendizaje se utilizó la plataforma Moodle. Para el diseño y evaluación del software se utilizó una configuración de RUP (por sus siglas, Rational Unified Process), el método Delphi y el coeficiente de concordancia W de Kendall. Se implementó una herramienta que permite a los profesores gestionar cursos virtuales en línea de apoyo a la enseñanza presencial. Su diseño proporciona facilidad de uso y de gestión, permite la administración de perfiles de usuario, la gestión de actividades y recursos de los cursos creados, y la administración del sitio. El software desarrollado es una herramienta didáctica flexible orientada al usuario para la gestión de los contenidos básicos de Estadística Sanitaria y responde a las necesidades del modelo del proceso enseñanza aprendizaje de la de esta asignatura.A sociedade do conhecimento tem provocado mudanças na forma como o conhecimento é gerado e transmitido; É por isso que o papel da universidade hoje é proporcionar aprendizagem nos alunos em correspondência com o desenvolvimento econômico, cultural e social de cada país. Por essa razão, o ambiente virtual Estatísticas de Saúde foi concebido como uma ferramenta didática para fortalecer a educação a distância em Enfermagem. Uma pesquisa de desenvolvimento foi realizada entre setembro de 2018 e junho de 2020 na Faculdade de Ciências Médicas de Bayamo "Efraín Benítez Popa. Para o desenvolvimento do ambiente virtual de aprendizagem, foi utilizada a plataforma Moodle. Para o projeto e avaliação do software, foram utilizadas uma configuração de RUP (para sua sigla, Rational Unified Process), o método Delphi e o coeficiente de concordância de Kendall W. Foi implementada uma ferramenta que permite aos professores gerir cursos virtuais online para apoiar o ensino presencial. Seu design proporciona facilidade de uso e gerenciamento, permite a administração de perfis de usuários, o gerenciamento de atividades e recursos dos cursos criados e a administração do site. O software desenvolvido é uma ferramenta didática flexível orientada ao usuário para a gestão dos conteúdos básicos de Estatística em Saúde e responde às necessidades do modelo do processo de ensino-aprendizagem desta disciplina

    Formation of Two-Ion Crystals by Injection from a Paul-Trap Source into a High-Magnetic-Field Penning Trap

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    Two-ion crystals constitute a platform for investigations of quantum nature that can be extended to any ion species or charged particle provided one of the ions in the crystal can be directly laser-cooled and manipulated with laser radiation. This paper presents the formation of two-ion crystals for quantum metrology in a 7-tesla open-ring Penning trap. 40^{40}Ca+^+ ions are produced either internally by photoionization or externally in a (Paul-trap) source, transported through the strong magnetic field gradient of the superconducting solenoid, and captured in-flight with a mean kinetic energy of a few electronvolts with respect to the minimum of the Penning-trap potential well. Laser cooling of the two-ion crystal in a strong magnetic field towards reaching the quantum regime is also presented with particular emphasis on the cooling of the radial modes
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