117 research outputs found

    Two color multichannel heterodyne interferometer set up for high spatial resolution electron density profile measurements in TJ-II

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    Proceedings of: 18th Topical Conference on High-Temperature Plasma Diagnostics, Wildwood, New Jersey (USA), 16-20 May 2010.Expanded-beam multichannel heterodyne interferometer has been installed on the TJ-II stellarator. Careful design of the optical system has allowed complete control on the evolution of both Gaussian beams along the interferometer, as well as the evaluation and optimization of the spatial resolution to be expected in the measurements. Five CO2 (measurement) channels and three Nd:YAG (vibration compensation) channels have been used to illuminate the plasma with a probe beam of 100 mm size. An optimum interpolation method has been applied to recover both interferometric phasefronts prior to mechanical vibration subtraction. The first results of the installed diagnostic are presented in this paper.This work was supported by Spanish Ministry of Education and Science Grant No. ENE2006-13559FTN . The authors would also like to acknowledge the help of Ernesto Garcia Ares and Jose Ramon Lopez Fernandez for setting up the signal conditioning systems

    Are we doing enough to understand our relationship with the environment? A bibliometric analysis of the instruments that evaluate pro-environmental behavior

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    This article provides information on the evolution of research using instruments to assess pro-environmental behavior (PEB), based on a bibliometric analysis of academic publications from 2011 to 2023. The study shows that research has rapidly increased in recent years, with 538 articles published in 257 high-impact journals across various areas of knowledge. The literature mainly comes from the United States, followed by Europe and Asia. The most often addressed topics were green behavior, sustainability, climate change, and biodiversity conservation. Attitudes were the most addressed goal, but there is a growing interest in evaluating PEB from different perspectives. Surveys were the most widely used instrument to assess PEB, but it is important to consider alternative instruments such as interviews and focus groups. The study highlights the need for more research on evaluating PEB and emphasizes that the instruments used should undergo validation and reliability processes to ensure accuracy

    Calibration of a high spatial resolution laser two-color heterodyne interferometer for density profile measurements in the TJ-II stellarator

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    Proceedings of: 17th Topical Conference on High-Temperature Plasma Diagnostics, Albuquerque, New Mexico, 11-15 May 2008A high spatial resolution two-color (CO2, lambda=10.6 mum, He-Ne, lambda=633 nm) interferometer for density profile measurements in the TJ-II stellarator is under development and installation, based in the currently operational single channel two-color heterodyne interferometer. To achieve the objectives of 32 channels, with 4-5 mm lateral separation between plasma chords, careful design and calibration of the interferometric waveforms for both the measurement and vibration compensation wavelengths are undertaken. The first step has been to set up in our laboratories an expanded-beam heterodyne/homodyne interferometer to evaluate the quality of both interferometric wavefronts, a reported source of poor vibration compensation and thus low resolution in the density profile measurements. This novel interferometric setup has allowed us to calibrate the spatial resolution in the profile measurements resulting in ~2 mm lateral resolution in the reconstruction of the interferometric wavefront

    Ru-Promoted Ni/γAl2O3 Fluidized Catalyst for Biomass Gasification

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    Fluidizable catalysts based on Ni/γAl2O3 with added Ru were used for the gasification of a lignin surrogate (2-methoxy-4-methylphenol) in a fluidized CREC Riser Simulator reactor. This was done in order to quantify lignin surrogate conversion and lignin surrogate products (H2, CO, CO2 and CH4) as well as the coke deposited on the catalyst. The catalysts that were evaluated contained 5% wt. Ni with various Ru loadings (0.25%, 0.5% and 1% wt). These catalysts were synthesized using an incipient Ni and Ru co-impregnation. Catalysts were characterized using XRD, N2 adsorption-desorption (BET Surface Area, BJH), Temperature Programmed Reduction (TPR), Temperature Programmed Desorption (TPD) and H2 chemisorption. Catalytic steam gasification took place at 550, 600 and 650 ◦C using 0.5, 1.0 and 1.5, steam/biomass ratios. The results obtained showed that Ru addition helped to decrease both nickel crystallite site sizes and catalyst acid site density. Moreover, it was observed that coke on the catalyst was reduced by 60%. This was the case when compared to the runs with the Ni/γAl2O3 free of Ru

    Effective Tetradentate Compound Complexes against Leishmania spp. that Act on Critical Enzymatic Pathways of These Parasites

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    The spectrum and efficacy of available antileishmanial drugs is limited. In the present work we evaluated in vitro the antiproliferative activity of 11 compounds based on tetradentate polyamines compounds against three Leishmania species (L. braziliensis, L. donovani and L. infantum) and the possible mechanism of action. We identified six compounds (3, 5, 6, 7, 8 and 10) effective against all three Leishmania spp both on extracellular and intracellular forms. These six most active leishmanicidal compounds also prevent the infection of host cells. Nevertheless, only compound 7 is targeted against the Leishmania SOD. Meanwhile, on the glucose metabolism the tested compounds have a species-specific effect on Leishmania spp.: L. braziliensis was affected mainly by 10 and 8, L. donovani by 7, and L. infantum by 5 and 3. Finally, the cellular ultrastructure was mainly damaged by 11 in the three Leishmania spp. studied. These identified antileishmania candidates constitute a good alternative treatment and will be further studied.This research was funded by THE SPANISH MINISTRY OF ECONOMY AND COMPETITIVENESS (MINECO), CONSOLIDER-INGENIO 2010, grant number CDS2010-00065; THE EUROPEAN RESEARCH FOUNDATION, grant number ERC-2009-StG-239910; THE MICINN, grant number CTQ2009-08464; and INNPLANTA, grant number INP-2011-0059-PCT-420000-ACT1

    SINCRONIZACIÓN DE DATOS ENTRE SISTEMAS DE PRODUCCIÓN Y ENSAYO

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    ResumenEn equipos de desarrollo de software profesionales, existes diferentes ambientes en los cuales se pueden probar cambios de código fuente, realizar pruebas de funcionalidad o cambios experimentales, para esto, existen principalmente tres entornos: Desarrollo, Ensayo y Producción. Esta investigación se centra en cómo establecer una comunicación y sincronización de información entre los entornos de producción y ensayo, esto debido a la problemática que enfrenta un equipo de desarrollo de software para realizar pruebas de nuevas funcionalidades con información real y confiable, y no con datos ficticios. Realizar estas pruebas con datos reales utilizados en un sistema en producción sobre un escenario de ensayo, permite a los usuarios y clientes del sistema probar las nuevas funcionalidades en un ambiente lo más real posible y así detectar posibles errores que se puedan presentar cuando éstas se trasladen a producción en un entorno real. Existen muchas técnicas que permiten la comunicación y sincronización de información entre sistemas desde servicios web, restauraciones de base de datos, hasta comunicación directa entre base de datos. La investigación se centra en la comunicación de dos bases de datos por dblink, un paquete que pertenece al popular gestor de base de datos libre llamado PostgreSQL, utilizado actualmente por empresas, instituciones públicas y privadas para sus sistemas en entornos de producción, además de estudiantes durante el aprendizaje.Palabra(s) Clave: Dblink, Ensayo, Postgresql, Producción, Sincronización. SYNCHRONIZATION OF DATA BETWEEN PRODUCTION AND TESTING SYSTEMSAbstractIn professional software development teams, there are different environments in which you can test source code changes, perform functionality tests or experimental changes, for this, there are mainly three environments: Development, Staging and Production. This research focuses on how to establish communication and synchronization of information between production and staging environments, due to the problems faced by a software development team to test new functionalities with real and reliable information, and not with fictitious data. Carrying out these tests with real data used in a production system on a staging scenario allows the users and clients of the system to test the new functionalities in an environment as real as possible and to detect possible errors that may occur when they are transferred to production in a real environment. There are many techniques that allow the communication and synchronization of information between systems as web services, database restorations and direct communication between databases. The research focuses on the communication of two databases by "dblink", a package belonging to the popular free database manager PostgreSQL, currently used by companies, public and private institutions for their production systems, as well as students in learning environments.Keywords: Dblink, Postgresql, Production system, Stage system, Synchronization

    VARIACIONES ALTITUDINALES EN IONES DE H Y AL EN EL CONTENIDO DE FE EN SUELOS DE LA SELVA AMAZÓNICA

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    Los suelos varían ampliamente en la Amazonía mostrando gran diversidad, diferentes características morfológicas y propiedades físico-químicas. Las investigaciones llevadas a cabo en estas áreas ayudan al conocimiento general de los suelos nativos e inexplorados y proporcionan muestras de control para su estudio. En la literatura existen importantes investigaciones de los bosques amazónicos en un entorno heterogéneo en relación con el suelo y la topografía. En el estudio actual se recolectaron muestras de suelo de 3 profundidades, 9 localidades y altitudes diferentes en la selva amazónica; y se proporciona la visión sobre los efectos de la profundidad del suelo así como las variaciones altitudinales sobre el contenido de Fe y la acidez intercambiable (intercambio iónico H-al). Los resultados indicaron que la altitud, en comparación con la profundidad del suelo, puede desempeñar un papel importante en el contenido de Fe y la acidez intercambiable.// Soils vary broadly across Amazonia having a large diversity of soil types, morphological characteristics and physicalchemical soil properties. Research that examines the soil properties of these areas improve the general knowledge of native, unexplored soils and provides promising control samples for soil science. There are important investigations in the literature that examine the Amazonian forests grow in a heterogeneous environment in relation to soil and topography. In this study soil samples of 3 depths and from 9 different altitudinal locations of Amazonian rainforest were collected. The present study provides the insight about the effects of soil depth as well as altitudinal variations on Fe content and interchangeable acidity (H-Al ion interchange). This study indicated that altitude compared to soil depth can play major role in Fe content and Interchangeable acidity

    Point-of-care manufacturing: a single university hospital's initial experience

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    The integration of 3D printing technology in hospitals is evolving toward production models such as point-of-care manufacturing. This study aims to present the results of the integration of 3D printing technology in a manufacturing university hospital.Analysis and interpretation of the data supported by Project PI18/01625 (Ministerio de Ciencia, Innovación y Universidades, Instituto de Salud Carlos III) and European Regional Development Fund (“Una manera de hacer Europa”)
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