1,119 research outputs found

    Llamadas sin marcación: ayuda para discapacitados visuales y llamadas de emergencia

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    Emergency calling shortcut es una aplicación para celular que tiene el propósito de ayudar a hacer llamadas telefónicas de emergencia a las personas con discapacidad visual o ciegas, sin embargo, ésta puede ser también útil a cualquier persona. Las llamadas se establecen más ágilmente que con el método convencional. Con esta aplicación no es necesario desbloquear el teléfono, ni solicitar su ejecución en el Smartphone, pues corre en segundo plano (así como WhatsApp). Con una combinación de movimientos simples del celular es posible llamar a tres números telefónicos diferentes, previamente guardados. La innovación principal es el uso del acelerómetro para interactuar con el usuario en combinación con el sensor de proximidad para evitar las llamadas no deseadas. Hasta donde sabemos, ésta aplicación es única en su forma de operar y más robusta que las que utilizan el botón de encendido/apagado ya que es prácticamente imposible que se establezcan llamadas de emergencia sin que el usuario lo solicite. Se sabe que las aplicaciones que usan el botón de encendido/apagado para establecer las llamadas algunas veces realizan llamadas no deseadas

    La responsabilidad patrimonial de la Administración en los desbordamientos del río Ebro.

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    La falta de mantenimiento de los cauces por parte del Organismo de Cuenca-Confederación Hidrográfica del Ebro, responsable de la limpieza y la conservación del mismo, fue la causa de los sucesivos desbordamientos del río Ebro a su paso por el término municipal de Novillas (Zaragoza) y de los daños producidos por dichas crecidas. Esta situación conllevó la afección tanto directa como indirecta de las plantaciones de regadío, infraestructuras (riegos, caminos), así como la pérdida total de la cosecha, al llevarse a efecto una inundación continuada, que provocó no solamente daños en el ciclo de las plantaciones aun no cosechadas, sino que igualmente dejó afectadas las futuras, al no poder continuar el ciclo vegetativo. Habida cuenta de lo anterior, y al no haberse realizado dichas labores de forma adecuada, serán imputables a la referida entidad los daños causados en los terrenos de la recurrente. Esta circunstancia permite reclamar a la Administración, exigiéndose la oportuna indemnización por los daños causados al perjudicado tanto por las pérdidas directas en los cultivos, como por el lucro cesante debido a las afecciones de la inundación.<br /

    A Multi-Disciplinary Approach to Remote Sensing through Low-Cost UAVs

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    The use of Unmanned Aerial Vehicles (UAVs) based on remote sensing has generated low cost monitoring, since the data can be acquired quickly and easily. This paper reports the experience related to agave crop analysis with a low cost UAV. The data were processed by traditional photogrammetric flow and data extraction techniques were applied to extract new layers and separate the agave plants from weeds and other elements of the environment. Our proposal combines elements of photogrammetry, computer vision, data mining, geomatics and computer science. This fusion leads to very interesting results in agave control. This paper aims to demonstrate the potential of UAV monitoring in agave crops and the importance of information processing with reliable data flow.We wish to acknowledge the Consejo Nacional de Ciencia y Tecnologia (CONACYT) for its financial support to the PhD studies of Gabriela Calvario. We are grateful to Cubo Geoespacial S.A .de C.V. and special to Ing. Jordan Martinez for the stimulus to this work, more information about this Company is available at: http://www.cubogeoespacial.com/. In addition, we are grateful to the support of the Tequila Regulatory Council (CRT), which has allowed us to monitor several crops. This paper has been supported by the Spanish Ministerio de Economia y Competitividad, contract TIN2015-64395-R (MINECO/FEDER, UE), as well as by the Basque Government, contract IT900-16. This work was also supported in part by CONACYT (Mexico), Grant 258033

    Viscosity and density measurements of aqueous amines at high pressures: MDEA-water and MEA-water mixtures for CO2 capture

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    Producción CientíficaViscosity and density are thermophysical properties crucial to characterizing any kind of fluid such as aqueous amines. These blends are becoming more and more relevant for their CO2 capture potential, such that having accurate viscosity and density measurements would prove useful. Densities and viscosities of these mixtures at atmospheric pressure may be found in the literature although it is more difficult to find values at high pressures, these potentially proving interesting when seeking to provide a full description of these fluids. Viscosity and density measurements at high pressures (up to 120 MPa) and at temperatures between 293.15 and 353.15 K of MDEA + water and MEA + water mixtures (both from 10 % to 40 % amine mass fraction) are presented in this work. Density measurements were performed with an Anton Paar DMA HPM densimeter with an expanded uncertainty (k = 2) less than ± 0.7 kg·m-3. A falling body technique was used to measure viscosities at high pressures due to its sturdiness in terms of corrosion. Details of this latter equipment are presented, including calibration using n-dodecane and uncertainty calculations, which give a relative expanded uncertainty (k = 2) of less than ± 2.4 % for the highest viscosity and ± 2.9 % for the lowest.2018-03-15Education Ministry (Spanish Government) through a FPU scholarshipProject for European Latin American Cooperation and Exchange (PEACE)Regional Government of Castilla y León through the Project VA295U1

    Administrative audit process development analysis in smes in the town of Escárcega

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    La Auditoría administrativa es la técnica más utilizada dentro de las organizaciones. Gracias a su implementación y desarrollo, la alta dirección encuentra un mecanismo de control que permite conocer el estado actual de sus procesos y la veracidad de la información. Este proyecto de investigación analizó el desarrollo de un proceso de auditoría en las pymes de la localidad de Escárcega. El proceso de investigación cuenta con un enfoque cualitativo de tipo descriptivo; se utilizó un cuestionario, verificando su validez y confiabilidad mediante el coeficiente del Alfa de Cronbach. Posteriormente, se realizó la colecta de datos mediante un muestreo probabilístico por racimos así se obtienen los resultados; estos muestran que el 50% de las Pymes aseguran conocer un proceso de auditoría administrativa que es interpretada como una estricta supervisión; por lo tanto, es preciso que los responsables de los negocios rompan con el miedo y se atrevan a llevarla a cabo.Administrative audit is the most used technique within organizations. Thanks to its implementation and development, senior management finds a control mechanism that allows knowing the current status of its processes and the veracity of the information. This research project studied the development analysis of an audit process in SMEs in the town of Escárcega. The fact-finding process has a descriptive qualitative approach. A questionnaire was used and its validity and reliability were verified through the Cronbach’s Alpha coefficient. After that the data was collected through probabilistic sampling by clusters. Thus, the results were obtained. They showed that 50% of SMEs claimed to know an administrative audit process that was interpreted as strict supervision. Therefore, it is necessary for business managers to overcome the fear and dare to carry it out.Facultad de Ciencias Económica

    A Multi-Disciplinary Approach to Remote Sensing through Low-Cost UAVs

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    The use of Unmanned Aerial Vehicles (UAVs) based on remote sensing has generated low cost monitoring, since the data can be acquired quickly and easily. This paper reports the experience related to agave crop analysis with a low cost UAV. The data were processed by traditional photogrammetric flow and data extraction techniques were applied to extract new layers and separate the agave plants from weeds and other elements of the environment. Our proposal combines elements of photogrammetry, computer vision, data mining, geomatics and computer science. This fusion leads to very interesting results in agave control. This paper aims to demonstrate the potential of UAV monitoring in agave crops and the importance of information processing with reliable data flow.We wish to acknowledge the Consejo Nacional de Ciencia y Tecnologia (CONACYT) for its financial support to the PhD studies of Gabriela Calvario. We are grateful to Cubo Geoespacial S.A .de C.V. and special to Ing. Jordan Martinez for the stimulus to this work, more information about this Company is available at: http://www.cubogeoespacial.com/. In addition, we are grateful to the support of the Tequila Regulatory Council (CRT), which has allowed us to monitor several crops. This paper has been supported by the Spanish Ministerio de Economia y Competitividad, contract TIN2015-64395-R (MINECO/FEDER, UE), as well as by the Basque Government, contract IT900-16. This work was also supported in part by CONACYT (Mexico), Grant 258033

    Density and viscosity measurements of aqueous amines at high pressures: DEA-water, DMAE-water and TEA-water mixtures

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    Producción CientíficaIn this paper, density and viscosity measurements at pressures up to 140 MPa are presented in a temperatura range from (293.15 to 393.15) K for diethanolamine (DEA) + water, triethanolamine (TEA) + wáter and 2-dimethylaminoethanol (DMAE) + water in amine weight concentrations from 10% to 40%. Densities were measured using a vibrating tube densimeter (Anton Paar DMA HPM) with an expanded uncertainty (k = 2) less than ±0.7 kg m 3. Viscosity measurements were obtained using a falling body viscometer which was calibrated with water and dodecane. The viscosity expanded uncertainty (k = 2) ranges from ±2.5% for the highest viscosity to ±3.2% for the lowest.2019/05/05Regional Government of Castilla y León through the Project VA295U1

    Integration of biogas in the natural gas grid: thermodynamic characterization of a biogas-like mixture

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    Producción CientíficaThe composition of biogas may vary significantly due to the diversity of production sources, making essential to have a detailed knowledge of their thermophysical properties in order to develop and validate methods for the estimation of density, heat capacity and calorific value of biogas and biomethane. In this work the thermodynamic behavior of a synthetic biogas-like mixture, composed by methane (50%), carbon dioxide (35%), nitrogen (10%) and carbon monoxide (5%), is studied through accurate (p,ρ,T) experimental data obtained by using a single sinker densimeter with magnetic suspension coupling. The mixture was prepared by the gravimetric method at the Spanish National Metrology Institute (Centro Español de Metrología, CEM) and the accurate density measurements have been performed in the temperature range from (275 to 400) K and pressures up to 20 MPa. This work is part of the research project ‘Metrology for Biogas’ supported by the European Metrology Research Program. Experimental data are compared with the densities calculated with the GERG-2008 equation of state. Deviation between experimental and estimated densities is within a ±0.2% band at all temperatures, except at the lower temperature, 275 K, and pressures from (6 to 15) MPa, which shows a higher deviation.MEC ENE2013-47812-RJunta de Castilla y León VA391A12-1European Metrology Research Program ENG5

    Mathematical modelling of drying kinetics of avocado peels and its influence on flavan-3-ols content and antioxidant activity

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    This study was supported by project RTI2018-099835-A-I00 financed by MCIN/AEI/10.13039/501100011033/FEDER “Una manera de hacer Europa”, and by the project Proyectos I + D + i del Programa Operativo FEDER 2020 cod. B-AGR-506-UGR20.Funding for open access charge: Universidad de Granada / CBUAAvocado peel is one of the main by-products of avocado processing and is considered a promising source of phenolic compounds with various bioactivities. The drying step is essential for its storage at the industrial level, and it is the first step in the strategy of transforming by-products into functional ingredients. Therefore, this research evaluates the effect of the convective air-drying of avocado peels at three different temperatures (40, 60 and 80 ◦C) and airflows (0, 0.8 and 1.6 m/s) on the flavan-3-ols content and antioxidant activity. Moreover, the mathematical modelling of its drying kinetic was developed. A decrease in the flavan-3-ol and antioxidant content was found with increasing temperatures. However, a high impact of the airflow reducing the drying time and limiting the decrease in interesting compounds was found. Among the tested mathematical models, the Page model reported the highest values of R2 (from 0.9907 to 0.9973) and the lowest errors for most of the tem- peratures and airflows tested. However, at 80 ◦C with airflow, the Lewis model seemed to fit better (R2 = 0.9982). Finally, the drying conditions that showed the lowest decrease in procyanidin and antioxidants were 40 ◦C and an airflow of 1.6 m/s for 105 min.MCIN/AEI/FEDER "Una manera de hacer Europa" RTI2018-099835-A-I00Project Proyectos I + D + i del Programa Operativo FEDER 2020 B-AGR-506-UGR2
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