Now showing items 114-133 of 321

    • Evaluación de ecuaciones de resistencia al flujo sobre escollera 

      López Alonso, Raúl; Barragán Fernández, Javier; Colomer, M. Àngels (Maria Àngels) (Universidad Politécnica de Valencia, 2006)
      Uno de los principales problemas que surgen a la hora de diseñar o analizar hidráulicamente cauces revestidos de escollera es la incertidumbre asociada a la estimación de los coeficientes de resistencia al flujo. El presente ...
    • Evaluación de fórmulas de transporte de fondo en un río de gravas acorazado 

      López Alonso, Raúl; Vericat Querol, Damià; Batalla, Ramon J. (Instituto Mexicano de Tecnología del Agua (IMTA), 2015)
      El curso bajo del río Ebro (NE península Ibérica) presenta un cauce con lecho de gravas que discurre aguas abajo de un complejo de embalses. En dicho tramo, el lecho experimenta ciclos de rotura y restablecimiento de la ...
    • Evaluación del aporte hídrico de montaña en la cuenca del Ebro 

      López Alonso, Raúl; Justribó Pena, Cristina (Colegio de Ingenieros Técnicos de Obras Públicas (Madrid), 2008)
      Varios estudios al nivel regional y mundial han puesto de manifiesto que la contribución de las áreas de montaña a la generación de escorrentía es notablemente superior a la proporción de superficie que ocupan. En este ...
    • Evaluation of bed load transport formulae in a large regulated gravel bed river: The lower Ebro (NE Iberian Peninsula) 

      López Alonso, Raúl; Vericat Querol, Damià; Batalla, Ramon J. (Elsevier, 2014-03-14)
      This paper tests the predictive power of 10 bed load formulae against bed load rates obtained for a large regulated river (River Ebro) the armor layer of which is subject to repeated cycles of break-up and reestablishment. ...
    • Evaluation of peach tree growth characteristics under different irrigation strategies by LIDAR system: preliminary results 

      Pascual Roca, Miquel; Villar Mir, Josep Ma.; Rufat i Lamarca, Josep; Rosell Polo, Joan Ramon; Sanz Cortiella, Ricardo; Arnó Satorra, Jaume (International Society for Horticultural Science (ISHS), 2011)
      In a four-year experiment on peach (Prunus persica L. Batsch ‘Andross’) for fruit processing, canopy volume and tree shape were evaluated by scanning trees with a Light Detection and Ranging (LIDAR) system: a non-destructive ...
    • Experimental results of mechanical, adhesive, and laminated connections for laminated glass elements – A review 

      Centelles Soler, Xavier; Castro Chicot, José Ramón; Cabeza, Luisa F. (Elsevier, 2019)
      In order to increase transparency in buildings, structural elements made of laminated glass are being developed. The recent technological improvements in terms of material research, fabrication processes, and construction ...
    • Expresiones para la determinación del factor de fricción en ríos de fuerte pendiente 

      López Alonso, Raúl; Barragán Fernández, Javier (Centro de Estudios y Experimentación de Obras Públicas, 2003)
      Con base en una selección de 145 datos pertenecientes a ríos de montaña de fuerte pendiente (³ 1%) se han desarrollado cinco expresiones para determinar el factor de fricción de Darcy-Weisbach. La primera expresión se ...
    • Extreme-value distributions and renormalization group 

      Calvo, Iván; Cuchí Oterino, J. C.; Esteve, J. G.; Falceto, Fernando (American Physical Society, 2012)
      In the classical theorems of extreme value theory the limits of suitably rescaled maxima of sequences of independent, identically distributed random variables are studied. The vast majority of the literature on the subject ...
    • Eye-safe lidar system for pesticide spray drift measurement 

      Gregorio López, Eduard; Rocadenbosch Burillo, Francesc; Sanz Cortiella, Ricardo; Rosell Polo, Joan Ramon (MDPI, 2015)
      Spray drift is one of the main sources of pesticide contamination. For this reason, an accurate understanding of this phenomenon is necessary in order to limit its effects. Nowadays, spray drift is usually studied by ...
    • Facilitation in plant communities: the past, the present, and the future 

      Brooker, Rob W.; Maestre, Fernando T.; Callaway, Ragan M.; Lortie, Christopher L.; Cavieres, Lohengrin A.; Kunstler, Georges; Liancourt, Pierre; Tielbörger, Katja; Travis, Justin M. J.; Anthelme, Fabien; Armas, Cristina; Coll Mir, Lluís; Corcket, Emmanuel; Delzon, Sylvain; Forey, Estelle; Kikvidze, Zaal; Olofsson, Johan; Pugnaire, Francisco I.; Quiroz, Constanza L.; Saccone, Patrick; Schiffers, Katja; Seifan, Merav; Touzard, Blaise; Michalet, Richard (John Wiley and Sons, 2007-09-06)
      1. Once neglected, the role of facilitative interactions in plant communities has received considerable attention in the last two decades, and is now widely recognized. It is timely to consider the progress made by research ...
    • Fine root seasonal dynamics, plasticity, and mycorrhization in 2 coexisting Mediterranean oaks with contrasting aboveground phenology 

      Coll Mir, Lluís; Camarero Martínez, Jesús Julio; Martínez de Aragón, Juan (Taylor & Francis, 2015-12-03)
      To advance understanding of the mechanisms underpinning the coexistence of Mediterranean oak species, we conducted a year-long analysis of the production, architecture, and mycorrhization status of the fine roots of a mixed ...
    • Flexible system of multiple RGB-D sensors for measuring and classifying fruits in agri-food Industry 

      Méndez Perez, Rodrigo; Auat Cheein, Fernando A.; Rosell Polo, Joan Ramon (Elsevier B.V., 2017-05-29)
      The productivity of the agri-food sector experiences continuous and growing challenges that make the use of innovative technologies to maintain and even improve their competitiveness a priority. In this context, this paper ...
    • Flow resistance equations for mountain rivers 

      López Alonso, Raúl; Barragán Fernández, Javier; Colomer, M. Àngels (Maria Àngels) (Instituto Nacional de Investigación y Tecnología Agraria y Alimentaria (Espanya), 2009)
      Three models of flow resistance (a Keulegan-type logarithmic law and two models developed for large-scale roughness conditions: the full logarithmic law and a model based on an inflectional velocity profile) were calibrated, ...
    • Flow resistance equations without explicit estimation of the resistance coefficient for coarse-grained rivers 

      López Alonso, Raúl; Barragán Fernández, Javier; Colomer, M. Àngels (Maria Àngels) (Elsevier, 2007)
      The uncertainty and subjectivity inherent in estimating the resistance coeffi-cient is one of the main sources of error in the application of flow resistance equations tonatural channels. Various studies have shown that ...
    • Forest management for adaptation to climate change in the Mediterranean basin: a synthesis of evidence 

      Vilà Cabrera, Albert; Coll Mir, Lluís; Martínez-Vilalta, Jordi; Retana, Javier (Elsevier, 2017-10-21)
      As global climate becomes warmer, the maintenance of the structure and function of Mediterranean forests constitutes a key challenge to forest managers. Despite the need for forest adaptation, an overall evaluation of the ...
    • Forest structure of Mediterranean yew (Taxus baccata L.) populations and neighbor effects on juvenile yew performance in the NE Iberian Peninsula 

      Casals, Pere; Camprodon, Jordi; Caritat, Antònia; Ríos, Ana I.; Guixé, David; Garcia-Martí, Xavier; Martín Alcón, Santiago; Coll Mir, Lluís (Instituto Nacional de Investigación y Tecnología Agraria y Alimentaria (INIA), 2015)
      Aim of study: In the Mediterranean region, yew (Taxus baccata L.) usually grows with other tree species in mixed forests. Yew recruitment and juvenile growth may depend on the structure of the forest and the net balance ...
    • Forest vegetation management under debate: an introduction 

      Ammer, Christian; Balandier, Philippe; Scott-Bentsen, N.; Coll Mir, Lluís; Löf, Magnus (Springer, 2011)
    • Fórmulas estadísticas de resistencia al flujo para hidráulica fluvial 

      López Alonso, Raúl (Colegio de Ingenieros Técnicos de Obras Públicas (Madrid), 2002)
      El empleo en hidráulica en lámina libre de las ecuaciones de resistencia al flujo de Gauckler-Manning o Darcy-Weisbach requiere la determinación de un coeficiente de resistencia; determinación que si bien es suficientemente ...
    • Fórmulas para el cálculo aproximado de la capacidad de transporte de sedimentos en ríos de montaña 

      López Alonso, Raúl (Colegio de Ingenieros Técnicos de Obras Públicas (Madrid), 2003)
      El cálculo de la capacidad de una corriente para el transporte de sedimentos de fondo requiere información sobre las características hidráulicas, geomorfológicas y granulométricas del cauce. Sin embargo, en ríos de fuerte ...
    • Fruit detection and 3D location using instance segmentation neural networks and structure-from-motion photogrammetry 

      Gené Mola, Jordi; Sanz Cortiella, Ricardo; Rosell Polo, Joan Ramon; Morros Rubió, Josep Ramon; Ruiz Hidalgo, Javier; Vilaplana Besler, Verónica; Gregorio López, Eduard (Elsevier, 2020-01-02)
      The development of remote fruit detection systems able to identify and 3D locate fruits provides opportunities to improve the efficiency of agriculture management. Most of the current fruit detection systems are based on ...