1,256 research outputs found

    El empleo de medios informáticos en el proceso de enseñanza-aprendizaje de la asignatura Obras Viales / The teaching training process in the area of construction supported by information computing technology (ICT)

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    El artículo muestra los resultados de una investigación realizada con el objetivo de perfeccionar el proceso de enseñanza-aprendizaje de la asignatura Obras Viales de la carrera pedagógica de Construcción a través del empleo de los medios informáticos. Se emplearon diferentes métodos de investigación, entre los que se resaltan: la revisión de documentos de la especialidad y de investigaciones nacionales e internacionales, las entrevistas y encuestas dirigidas a estudiantes y profesores y la observación a clases, a partir de los cuales se logró conformar un diagnóstico inicial y la caracterización del desarrollo histórico de la carrera y del proceso de enseñanza-aprendizaje de la asignatura. Se ofrece una estrategia metodológica, compuesta por tres fases: diagnóstico, programación-implementación y evaluación, y los medios informáticos, representados fundamentalmente por un material docente, un material de estudio complementario sobre una temática, una multimedia y objetos de aprendizaje.ABSTRACTThe paper shows the results of a research carried out with the aim of improving the teaching training process in the area of construction by using information-computing technology (ICT) support. The general framework was completed by examining documents from the Ministry of Education as well as research project reports. Interviews and surveys to students and teachers and lesson supervising were used for collecting data, related to the state of art and the main trends in the training of teachers of construction. The findings include a procedural strategy having three phases, diagnosis, planning, implementing and evaluating and its corresponding information technology support

    RECURSO DIDÁCTICO DIGITAL PARA LA ENSEÑANZA APRENDIZAJE EN LA ASIGNATURA DISEÑO GEOMÉTRICO DE CARRETERAS

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    El trabajo muestra los resultados de una investigación realizada con el objetivo de elaborar un recurso didáctico digital con la herramienta exelearning para la asignatura Diseño Geométrico de Carretera que se imparte en el 4to año del Curso por Encuentro (CPE) de la carrera Ingeniería Civil, en la modalidad semipresencial, que contribuya al perfeccionamiento del proceso de enseñanza - aprendizaje de la misma. Se emplearon diferentes métodos de investigación, entre los que resaltan: la revisión de documentos de la especialidad y de investigaciones nacionales e internacionales, las encuestas dirigidas a estudiantes y profesores y la observación a clases, a partir de los cuales se logró constatar la problemática existente. El resultado concreto es un recurso didáctico digital en forma de sito Web elaborado con la herramienta exelearning, dirigido a estudiantes y profesores, para ser utilizado como medio de enseñanza y autoaprendizaje de la asignatura en el CPE de la carrera Ingeniería Civil

    Comparing risk of failure models in water supply networks using ROC curves

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    [EN] The problem of predicting the failure of water mains has been considered from different perspectives and using several methodologies in engineering literature. Nowadays, it is important to be able to accurately calculate the failure probabilities of pipes over time, since water company profits and service quality for citizens depend on pipe survival; forecasting pipe failures could have important economic and social implications. Quantitative tools (such as managerial or statistical indicators and reliable databases) are required in order to assess the current and future state of networks. Companies managing these networks are trying to establish models for evaluating the risk Of failure in order to develop a proactive approach to the renewal process, instead of using traditional reactive pipe substitution schemes. The main objective of this paper is to compare models for evaluating the risk of failure in water supply networks. Using real data from a water Supply company, this study has identified which network characteristics affect the risk of failure and which models better fit data to predict service breakdown. The comparison using the receiver operating characteristics (ROC) graph leads us to the conclusion that the best model is a generalized linear model. Also, we propose a procedure that can be applied to a pipe failure database, allowing the most appropriate decision rule to be chosen. (C) 2009 Elsevier Ltd. All rights reserved.The authors are indebted to the anonymous referees whose suggestions improved the original manuscript. This study was partially supported by a grant from MEyC (Ministerio de Educacion y Ciencia, Spain, Project CGL2004-05507). The research of Ana Debon was partially supported by a grant from Generalitat Valenciana (Grant no. GVPRE/2008/103).Debón Aucejo, AM.; Carrión García, A.; Cabrera Marcet, E.; Solano, H. (2010). Comparing risk of failure models in water supply networks using ROC curves. Reliability Engineering & System Safety. 95(1):43-48. doi:10.1016/j.ress.2009.07.004S434895

    Dissecting the role of NtrC and RpoN in the expression of assimilatory nitrate and nitrite reductases in Bradyrhizobium diazoefficiens

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    Bradyrhizobium diazoefficiens, a nitrogen- fixing endosymbiont of soybeans, is a model strain for studying rhizobial denitrification. This bacterium can also use nitrate as the sole nitrogen (N) source during aerobic growth by inducing an assimilatory nitrate reductase encoded by nasC located within the narK-bjgb-flp-nasC operon along with a nitrite reductase encoded by nirA at a different chromosomal locus. The global nitrogen two-component regulatory system NtrBC has been reported to coordinate the expression of key enzymes in nitrogen metabolism in several bacteria. In this study, we demonstrate that disruption of ntrC caused a growth defect in B. diazoefficiens cells in the presence of nitrate or nitrite as the sole N source and a decreased activity of the nitrate and nitrite reductase enzymes. Furthermore, the expression of narK-lacZor nirA-lacZ transcriptional fusions was significantly reduced in the ntrC mutant after incubation under nitrate assimilation conditions. AB. diazoefficiens rpoN 1/2 mutant, lacking both copies of the gene encoding the alternative sigma factor σ54, was also defective in aerobic growth with nitrate as the N source as well as in nitrate and nitrite reductase expression. These results demonstrate that the NtrC regulator is required for expression of the B. diazoefficiens nasC and nirA genes and that the sigma factor RpoN is also involved in this regulation.Instituto de Biotecnologia y Biologia Molecula

    Micromobility Users' Behaviour and Perceived Risk During Meeting Manoeuvres

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    [EN] Mobility patterns and lifestyles have changed in recent years in cities worldwide, thanks to the strong rise in modes of travel commonly referred to as micromobility. In this context, e-scooters have experienced a great rise globally which has led to an increase of crashes involving this type of micromobility vehicle in urban areas. Thus, there is a need to study e-scooter users¿ behaviour and their interaction with cyclists. This research aimed at characterizing the meeting manoeuvre between micromobility users along diverse typologies of two-way bicycle track by using an in-strumented e-scooter. As a result, bicycle tracks having concrete or vegetated curb presented lower clearance distance (¿0.8 m) than those without edge elements (>1 m), with no statistically signif-icant differences found between the interaction with bicycles and e-scooters. Additionally, an online questionnaire was proposed to assess users¿ perceived risk during the meeting manoeuvre, concluding that micromobility users feel safer and more comfortable riding on pavements away from parked or moving motorized traffic, and on protected bicycle tracks.FundingThis research is part of the research project PID2019-111744RB-I00, funded by MCIN/AEI/10.13039/501100011033.Fonseca-Cabrera, AS.; Llopis-Castelló, D.; Pérez Zuriaga, AM.; Alonso-Troyano, C.; García García, A. (2021). Micromobility Users' Behaviour and Perceived Risk During Meeting Manoeuvres. International Journal of Environmental research and Public Health (Online). 18(23):1-15. https://doi.org/10.3390/ijerph182312465S115182

    Game-Mover: herramienta gamificada para diagnóstico del síndrome de Boreout

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    Curso de Especial InterésEsta propuesta se presenta debido a la necesidad que tienen las empresas actuales en identificar aquellos síndromes que pueden afectar directamente su productividad. Dentro de estas problemáticas se ha identificado el Boreout, el cual se caracteriza básicamente porque el empleado entra en un estado crítico de aburrimiento en su lugar de trabajo, lo que genera consecuencias negativas tanto para la salud emocional del empleado como el desempeño de la empresa. Game- Mover es una herramienta gamificada basada en el modelo de motivación ASH-MOT, el cual está diseñado con el objetivo de brindar un diagnostico a las empresas sobre esta problemática en las empresas.Resumen, 14 Justificacion, 15 Necesidad, 15 Marco teorico, 17 Psicologia positiva, 18 Variables de la psicología positiva, 21 Aplicación de la psicología positiva en las organizaciones, 23 La felicidad en el trabajoy la satisfaccionlaboral, 24 Calidad de vida laboral, 27 Motivacion, 29 Motivación laboral, 33 Modelo integrado de motivación ASH-MOT, 34 Boreout, 36 Monotonía vs variedad en las labores, 38 Autoeficacia, 39Desarrollo profesional, 40 Autoconcepto, 41 Estaticidad Vs Dinámica en el trabajo, 42 Gamificacion, 43 Teoria clasica de los test, 54 Metodologia, 56 Población, 56 Método, 56 Etapas, 57 Estudio de mercado, 57 Objeto de estudio:, 57 Objetivo General:, 58 Objetivos específicos:, 58 Presentación del producto, 58 Análisis de la demanda, 59 Comportamiento de la demanda, 59 Identificación y evaluación de los segmentos de mercado, 60 Tamaño del mercado, 60 Delimitación geográfica y descripción del mercado, 62 Análisis de la oferta, 63 Comportamiento de la oferta y estructura del sector, 63 Análisis del producto, 66 Análisis de distribución, 67 Análisis de proveedores ,68 Análisis de costos, 69 Resultados, 77 Nivel 0: Bienvenida e ingreso de información, 79 Descripción, 79 Justificación psicológica ,80 Justificación gamificada., 80 Nivel 1: Cruce de laberinto ,81 Descripción, 81 Justificación psicológica del nivel ,82 Justificación gamificada, 83 Nivel 2: Cruce de piso falso, 84 Descripción ,84 Justificación psicológica ,85 Justificación gamificada,85 Nivel 3: Rompecabezas en cerradura de puerta,87Descripción ,87 Justificación psicológica ,88 Justificación gamificada,88 Nivel 4: Recolecta objetos,90 Descripción ,90 Justificación psicológica.,91 Justificación gamificada ,91 Nivel 5: Combinación de llaves para activación de puentes colgantes. ,93 Descripción ,93 Justificación psicológica, 94 Justificación gamificada ,94 Nivel 6: Patrón de luces, 96 Descripción ,96 Justificación psicológica ,97 Justificación gamificada ,97 Nivel 7: Ascenso de pared por escaleras,99 Descripción ,99 Justificación psicológica,100 Justificación gamificada ,100 Nivel 8: Cruce de abismos con lianas ,101 Descripción ,101 Justificación psicológica, 102 Justificación gamificada , 102 Nivel 9: Evadir obstáculos ,104 Descripción ,104 Justificación psicológica ,105 Justificación gamificada ,105 Nivel 10: Descifrar criptex, 107 Descripción, 107 Justificación psicológica ,108 Justificación gamificada, 108 Nivel 11: Descifrar recorrido de transformación, 110 Descripción, 110 Justificación psicológica, 111 Justificación gamificada, 111 Discusiones y conclusiones, 115 Referencias, 117PregradoPsicólog

    Expanding the Clinical and Molecular Heterogeneity of Nonsyndromic Inherited Retinal Dystrophies

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    A cohort of 172 patients diagnosed clinically with nonsyndromic retinal dystrophies, from 110 families underwent full ophthalmologic examination, including retinal imaging, electrophysiology, and optical coherence tomography, when feasible. Molecular analysis was performed using targeted next-generation sequencing (NGS). Variants were filtered and prioritized according to the minimum allele frequency, and finally classified according to the American College of Medical Genetics and Genomics guidelines. Multiplex ligation-dependent probe amplification and array comparative genomic hybridization were performed to validate copy number variations identified by NGS. The diagnostic yield of this study was 62% of studied families. Thirty novel mutations were identified. The study found phenotypic intra- and interfamilial variability in families with mutations in C1QTNF5, CERKL, and PROM1; biallelic mutations in PDE6B in a unilateral retinitis pigmentosa patient; interocular asymmetry RP in 50% of the symptomatic RPGR-mutated females; the first case with possible digenism between CNGA1 and CNGB1; and a ROM1 duplication in two unrelated retinitis pigmentosa families. Ten unrelated cases were reclassified. This study highlights the clinical utility of targeted NGS for nonsyndromic inherited retinal dystrophy cases and the importance of full ophthalmologic examination, which allows new genotypeephenotype associations and expands the knowledge of this group of disorders. Identifying the cause of disease is essential to improve patient management, provide accurate genetic counseling, and take advantage of gene therapyebased treatments. (J Mol Diagn 2020, 22: 532e543; https:// doi.org/10.1016/j.jmoldx.2020.01.003)Supported by grants from the Instituto de Salud Carlos III (ISCIII) of the Spanish Ministry of Health, including the Center for Biomedical Research Network on Rare Diseases (CIBERER), Fondo de Investigacion Sanitaria grant PI16/00539; the Spanish National Organization for the Blind (Fundación ONCE); and Fundación Mutua Madrileña. G.G.-G. is sponsored by the CIBERER, and A.R.-M. is supported by the Río Hortega program from ISCIII.Medicin

    Implementation of a Low-Cost Data Acquisition System on an E-Scooter for Micromobility Research

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    [EN] In recent years, cities are experiencing changes in the ways of moving around, increasing the use of micromobility vehicles. Bicycles are the most widespread transport mode and, therefore, cyclists¿ behaviour, safety, and comfort have been widely studied. However, the use of other personal mobility vehicles is increasing, especially e-scooters, and related studies are scarce. This paper proposes a low-cost open-source data acquisition system to be installed on an e-scooter. This system is based on Raspberry Pi and allows collecting speed, acceleration, and position of the e-scooter, the lateral clearance during meeting and overtaking manoeuvres, and the vibrations experienced by the micromobility users when riding on a bike lane. The system has been evaluated and tested on a bike lane segment to ensure the accuracy and reliability of the collected data. As a result, the use of the proposed system allows highway engineers and urban mobility planners to analyse the behaviour, safety, and comfort of the users of e-scooters. Additionally, the system can be easily adapted to another micromobility vehicle and used to assess pavement condition and micromobility users¿ riding comfort on a cycling network when the budget is limited.This research was funded by MCIN/AEI/10.13039/501100011033, grant number PID2019-111744RB-I00.Pérez Zuriaga, AM.; Llopis-Castelló, D.; Just-Martínez, V.; Fonseca-Cabrera, AS.; Alonso-Troyano, C.; García García, A. (2022). Implementation of a Low-Cost Data Acquisition System on an E-Scooter for Micromobility Research. Sensors. 22(21):1-18. https://doi.org/10.3390/s22218215118222

    'Background noise' and landscape exploitation in the Late Iron Age Andalusian countryside

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    Proceeding of the international meeting Siena, Italy, May 25-27, 2007.In this paper we present the results from a survey carried out from 2000 to 2003 in the Guadiana Menor valley (Jaen province, Spain). The sampling strategy was designed to explore the presence of archaeological finds in very different landscape units, from the floodplains to the uncultivated slopes of the Cazorla massif. Field survey revealed very high contrasts in fi nd densities, suggesting different patterns of land use. On the valley floor we recorded a weak carpet-like pattern of sherds dating from the Iron Age to Roman times. Its distribution suggests intensive agricultural activities such as manuring in a context of increasing pressure on resources during the Romanization process. In the highland area, the much more scarce evidence seems to be connected with pastoral activity, intensive farming of small valleys, and control over strategic mountain passes. We will here present methodological issues relating to the field survey and reliability problems raised by erosion and land use history of the study area.The work presented in this paper was developed in the framework of the research project ‘El Poblamiento Ibérico en el valle del Guadiana Menor. Una perspectiva desde la Arqueología del Paisaje’ (DGES-PB98/0775), led by Teresa Chapa Brunet.Peer Reviewe

    ¿Es posible incrementar la motivación por oportunidad de los inmigrantes emprendedores?

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    This study examines factors that condition opportunity motivation of immigrant entrepreneurs in 31 European countries. We find that distance in language between immigrants’ country of residence and country of origin harms entrepreneurial opportunity motivation and that, at the same time, opportunity motivation is likely to benefit from both the normative aspects of institutions that reduce locals’ opportunity motivation (cultural values of uncertainty avoidance) and the regulative distance (the dissimilarity between the laws and regulations). Implications for the formulation of public policies and actions of private associations to promote immigrant entrepreneurs’ opportunity motivation derive from our work.Este estudio analiza los factores que condicionan la motivación por oportunidad del inmigrante emprendedor establecido en 31 países europeos. Se encuentra que la distancia lingüística existente entre los países de residencia y de origen del inmigrante socava su motivación emprendedora por oportunidad. El trabajo también encuentra que tal motivación aumenta cuando: (1) la cultura del país de acogida se caracteriza por la presencia de valores culturales de elevada aversión a la incertidumbre, que habitualmente reduce el comportamiento emprendedor de la población local; y (2) las leyes y regulaciones vigentes en su país de origen y su país residencia difieren
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