2,230 research outputs found

    Metodología para la intervención en elementos históricos: el caso de la espadaña del convento de Nuestra Señora de la Consolación (Alcalá de Henares-Madrid-España)

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    The purpose of this paper is the study of damage detected in the belfry of the convent of “Nuestra Señora de la Consolación”, Alcalá de Henares, as well as the materials analysis to establish both the current state of the structure as the nature and extent of the deterioration of the original materials. For a good detection of defects in the structure were the application of a methodology of previous studies in historical buildings, in which were used, among other techniques, the element Thermographic Analysis, to then proceed to the experimental determination of the emissivities of the different inspected materials. The use of supplementary techniques of analysis as porosimetry of mercury, x-ray diffraction, electron microscopy of scanning and thermogravimetry, as well as mechanical characterization of materials, has made it possible to delve into the characteristics of the Union mortar and employed; evaluate comprehensively current degradation status and facilitating the rehabilitation.El objeto del presente trabajo es el estudio de daños detectados en la espadaña del Convento de Nuestra Señora de la Consolación, Alcalá de Henares, así como el análisis de los materiales para establecer, tanto el estado actual de la estructura, como la naturaleza y grado de deterioro de los materiales originales. Para ello se aplicó una metodología de estudios previos en edificaciones históricas, en la que se utilizaron, entre otras técnicas, el análisis termográfico del elemento, para posteriormente proceder a la determinación experimental de las emisividades de los diferentes materiales inspeccionados. El uso de técnicas complementarias de caracterización y análisis como porosimetría de intrusión de mercurio, difracción de rayos X, microscopía electrónica de barrido y termogravimetría, así como la caracterización mecánica de los materiales, ha permitido ahondar en las características del mortero de unión y las piezas de fábrica; evaluando completamente el estado actual y facilitando su rehabilitación

    Modeling tree-growth: Assessing climate suitability of temperate forests growing in Moncayo Natural Park (Spain)

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    In the past few decades, temperate forests have been negatively altered by numerous anthropogenic activities and by the impact of ongoing climate change. These changes may require management actions to help preserve some forest tree species. In this sense, highly-detailed knowledge of tree growth and survival across territorial and climatic gradients will be important for forest conservation. We developed a novel approach to determine the optimal zones of forest growth and expansion through climate suitability maps, using a dense tree-ring network of four forest species in Moncayo Natural Park and high-resolution climate data. Our results showed that the mixed-effects models developed using climate data and tree size were able to predict between 65 and 80% of growth variability along the climatic gradient. All studied species were influenced by climate, and the relationship between growth and climate significantly differed along the prevailing climate gradient. Moreover, the suitability maps showed that the current species distribution is limited, and their application may serve as a tool for adaptive management in forests subjected to climate change

    Enhancement and Edge-Preserving Denoising: An OpenCL-Based Approach for Remote Sensing Imagery

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    Image enhancement and edge-preserving denoising are relevant steps before classification or other postprocessing techniques for remote sensing images. However, multisensor array systems are able to simultaneously capture several low-resolution images from the same area on different wavelengths, forming a high spatial/spectral resolution image and raising a series of new challenges. In this paper, an open computing language based parallel implementation approach is presented for near real-time enhancement based on Bayesian maximum entropy (BME), as well as an edge-preserving denoising algorithm for remote sensing imagery, which uses the local linear Stein’s unbiased risk estimate (LLSURE). BME was selected for its results on synthetic aperture radar image enhancement, whereas LLSURE has shown better noise removal properties than other commonly used methods. Within this context, image processing methods are algorithmically adapted via parallel computing techniques and efficiently implemented using CPUs and commodity graphics processing units (GPUs). Experimental results demonstrate the reduction of computational load of real-world image processing for near real-time GPU adapted implementation.ITESO, A.C

    Structural differences in mammal assemblages between savanna ecosystems of the Colombian Llanos

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    The Colombian Orinoquia region is characterized by a high diversity of mammals, which is associated with complex ecosystems that include large extensions of Neotropical savannas (known locally as “Llanos Orientales”). Despite accelerated anthropogenic transformations in savanna ecosystems, the knowledge to design effective conservation strategies, such as the distribution of mammal assemblages, is still lacking for this region. In this paper, we evaluate if assemblages of medium and large mammals (i.e., species richness, relative abundance and the contribution of the different trophic guilds) are homogeneous across the Colombian Llanos by comparing three savanna ecosystems: floodplains savannas associated with an Andean river, aeolian floodplains savannas and highland savannas. After a sampling effort of 3,150 camera trap/days, we recorded 16 mammal species from the three savanna ecosystems. We compared the three assemblages and their constituent trophic guilds by ANOSIM and SIMPER non-parametric permutation tests. The three assemblages differed in composition, structure and trophic guilds. The floodplains savannas, associated to an Andean river, present the highest diversity, contrastingly, the high-plain associated with the Guyanese Shield presents the lowest diversity. This pattern could be explained due to the greatest floristic diversity, complex vegetation structure and more fertile soils present in the riparian forests of the floodplains savannas, despite being the most anthropogenically transformed. The carnivores were the most variable category and herbivores were the most abundant. Our results show that the diversity of medium and large mammals is heterogeneously distributed in the Colombian Llanos. Therefore, it is necessary to implement targeted conservation strategies according to the characteristics, local fragility of each ecosystem in the territory and each species response by local conditions

    Structural differences in mammal assemblages between savanna ecosystems of the Colombian Llanos

    Get PDF
    The Colombian Orinoquia region is characterized by a high diversity of mammals, which is associated with complex ecosystems that include large extensions of Neotropical savannas (known locally as “Llanos Orientales”). Despite accelerated anthropogenic transformations in savanna ecosystems, the knowledge to design effective conservation strategies, such as the distribution of mammal assemblages, is still lacking for this region. In this paper, we evaluate if assemblages of medium and large mammals (i.e., species richness, relative abundance and the contribution of the different trophic guilds) are homogeneous across the Colombian Llanos by comparing three savanna ecosystems: floodplains savannas associated with an Andean river, aeolian floodplains savannas and highland savannas. After a sampling effort of 3,150 camera trap/days, we recorded 16 mammal species from the three savanna ecosystems. We compared the three assemblages and their constituent trophic guilds by ANOSIM and SIMPER non-parametric permutation tests. The three assemblages differed in composition, structure and trophic guilds. The floodplains savannas, associated to an Andean river, present the highest diversity, contrastingly, the high-plain associated with the Guyanese Shield presents the lowest diversity. This pattern could be explained due to the greatest floristic diversity, complex vegetation structure and more fertile soils present in the riparian forests of the floodplains savannas, despite being the most anthropogenically transformed. The carnivores were the most variable category and herbivores were the most abundant. Our results show that the diversity of medium and large mammals is heterogeneously distributed in the Colombian Llanos. Therefore, it is necessary to implement targeted conservation strategies according to the characteristics, local fragility of each ecosystem in the territory and each species response by local conditions

    Supplementation Under Intensive Grazing, Silage- Or Grain-Based Diets for Beef Production on Steer Performance and Meat Fatty Acid Composition

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    Alfalfa (Medicago sativa L.) is the main cultivated pasture in Argentina. In beef production enhanced productivity and profit depend on high stocking rates and pasture utilisation, with grain supplementation necessary to maintain high individual live weight gains (LWG) and to increase production per ha (Ustarroz, 1999). Substitution of grazed grass by concentrate can affect meat fatty acid (FA) composition (French et al., 2000). The objective of this study was to evaluate the effects of intensifying an alfalfa-based grazing system and two confinement dietary regimens for beef steer finishing on animal performance and meat FA composition

    Aprovechamiento de residuos de la industria textil para la preparación de telas de carbón activo.

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    Los residuos generados por la industria textil en España se han cuantificado sobre unas 30.000 Toneladas durante los últimos años. Debido al gran volumen de almacenamiento que necesitan estos residuos, así como la problemática generada por la disponibilidad geográfica, hacen que sea de gran interés el estudio del aprovechamiento de estos materiales, siendo de gran importancia la obtención de materiales carbonosos que poseen originariamente una estructura fibrilar en forma continua, cuya forma presenta características muy interesantes para distintas aplicaciones. En el presente trabajo se muestran los resultados de preparación y caracterización de materiales carbonosos a partir de residuos de la industria textil, usando como materia prima tejidos de algodón, los cuales se activarán químicamente con H3PO4. Las telas de carbón activo obtenidas serán usadas para testar su aplicación como adsorbentes y como materiales para almacenamiento de energía.Universidad de Málaga. Campus de Excelencia Internacional Andalucía Tech

    Study of H2/N2Mixture Plasma Treatment on the AISI 1045

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    In the present work, we analyzed the effect of the plasma treatment of 80% H2/20% N2 mixture plasma over the AISI 1045 steel. To produce the plasma, an AC discharge of 0.1 A at 350 V was produced at a total pressure of 3.0 Torr. The mixture plasma was analyzed using optical emission spectroscopy (OES), in the wavelength range of 200 to 1100 nm. The principal species observed in the plasma were NH, N2, N2+, H2, and Hα. The electron temperature and ion density have been measured using a double Langmuir probe. The samples of steel were treated by plasma at different discharge times, between 3 and 12 h, at the same pressure and AC parameters (0.1 A and 350 V). The treated samples were characterized using X-ray analysis, finding the phases gamma and epsilon of iron nitride. The thickness of the nitrided layers was measured using a scanning electron microscope (SEM). From the images obtained, it is possible to appreciate the interphase between the nitrided layer and the steel matrix. The relationship between the morphology of the surface of nitrided steel and the wetting was analyzed by measuring the contact angle between the surface and a drop of 5 μL of distilled water. The contact angle of the drop increased with the increase of plasma treatment time. The control sample without treatment presented a smaller angle, and after the treatment the surfaces of the steel became hydrophobic. This may be related to the morphology change of the steel surface produced by plasma treatment

    Health education in the community pharmacy: controlled in the province of Castellón study.

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    Introducción: La educación para la salud es una de las actividades que debe realizar el farmacéutico comunitario orientada hacia el paciente. Con el objetivo de conocer la influencia de la educación sanitaria en los pacientes, se realizó un estudio controlado en farmacias comunitarias de la provincia de Castellón.Material y métodos: En el estudio participaron catorce oficinas de farmacia (siete en el grupo control y siete en el grupo intervención). En todas ellas se realizó una encuesta inicial a los pacientes sobre educación para la salud. En las farmacias del grupo intervención se realizaron cinco campañas de educación sanitaria y al finalizar cada campaña los pacientes completaron una encuesta para valorar la educación sanitaria recibida. En las farmacias del grupo control se pasaron las encuestas a los pacientes pero no se realizaron las campañas de educación sanitaria.Resultados y discusión: Los pacientes están significativamente más satisfechos con la formación que reciben en las farmacias que realizan educación sanitaria. Además, se incrementa significativamente la percepción que tiene la población del farmacéutico en la oficina de farmacia como punto de referencia a la hora de ayudar a resolver sus problemas de salud. La educación sanitaria permite que los pacientes reciban formación completa acerca de temas de salud que les preocupan y les proporciona más capacidad para resolverlos por ellos mismos.Introduction: Health education is one of the roles of the community pharmacist.A controlled study of pharmacies in the Spanish province of Castellón was carried out with the aim of determining the influence of health education on the general public.Material and methods: Fourteen pharmacies took part in the study: seven in the group control and seven in the intervention group. An initial survey about health education was conducted among the patients of all fourteen pharmacies. In the pharmacies in the intervention group five campaigns of health education were instigated; after each campaign patients answered a survey to evaluate the health education received. In the pharmacies in the control group the same surveys were carried out without the implementation of any educational campaigns.Results and discussion: Patients of the pharmacies in the intervention group were significantly more satisfied with their level of knowledge about health matters than those in the control other group. In addition, the same patients had a significantly more satisfied with the formation they received in the pharmacies that implemented the educational campaigns. In addition, patients of the pharmacies in the intervention group had a significantly better perception of the pharmacist and of the pharmacy as a reference point with respect to resolving their health problems. Health education informs patients about aspects of health and endows them with the aptitude to make decisions related to their health problems
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