Now showing items 59-78 of 242

    • Data management and decision making: when Precision Agriculture puts us in trouble 

      Arnó Satorra, Jaume; Martínez Casasnovas, José Antonio; Escolà i Agustí, Alexandre (New Ag International SARL, 2018-06-01)
      The use of sensors in Precision Agriculture together with the trend of increasing spatial and temporal sampling resolutions, lead to the generation of huge amounts of data. The appropriate management of such data sets to ...
    • Deciduous tree reconstruction algorithm based on cylinder fitting from mobile terrestrial laser scanned point clouds 

      Méndez, Valeriano; Rosell Polo, Joan Ramon; Sanz Cortiella, Ricardo; Escolà i Agustí, Alexandre; Catalán, Heliodoro (Elsevier, 2014)
      Vector reconstruction of objects from an unstructured point cloud obtained with a LiDAR-based system (light detection and ranging) is one of the most promising methods to build three dimensional models of orchards. The ...
    • Deposición transversal de líquido de las boquillas de doble abanico TTJ60-11004 y TTJ60-11002 en distintas condiciones operacionales 

      Viana, R.G.; Ferreira, L.R.; Rosell Polo, Joan Ramon; Solanelles Batlle, Francesc; Machado, M.S.; Machado, A.F.L. (Sociedade Brasileira da Ciência das Plantas Daninhas, 2009)
      El objetivo de este trabajo fue el de evaluar la deposición transversal de caldo de las boquillas pulverizadoras de doble abanico TTJ60-11004 y TTJ60-11002 en distintas condiciones operacionales. Se utilizaron 5 muestras ...
    • Desarrollo de ecuaciones de flujo uniforme para ríos de grava 

      López Alonso, Raúl; Barragán Fernández, Javier (Centro de Estudios y Experimentación de Obras Públicas, 2004)
      Con base en un conjunto de 904 datos hidrométricos pertenecientes a ríos de grava (de alienación no sinuosa desprovistos de cubierta vegetal significativa en el cauce y carentes de obstáculos) se han desarrollado un conjunto ...
    • Desarrollo de ecuaciones de flujo uniforme para ríos de montaña 

      López Alonso, Raúl; Barragán Fernández, Javier (Colegios y Asociaciones de Ingenieros de Montes e Ingenieros Técnicos Forestales, 2004)
      Con base en una selección de 145 datos pertenecientes a ríos de montaña de fuerte pendiente (entre el 1 y 5%), de alineación no sinuosa, sin vegetación significativa en el cauce y sin transporte intenso de sedimentos, se ...
    • Design of a decision support method to determine volume rate for vineyard spraying 

      Gil Moya, Emilio; Escolà i Agustí, Alexandre (American Society of Agricultural and Biological Engineers, 2009)
      Dose determination in crops such as grapevine, which develops a large canopy within a relatively short period of time, becomes a key factor on the final success of plant protection product (PPP) application. Efficacy of ...
    • Design of paired laterals on uniformly sloping fields 

      Monserrat Viscarri, Joaquín; Barragán Fernández, Javier; Cots Rubió, Lluís (American Society of Civil Engineers (ASCE), 2018-03-30)
      Knowledge of the maximum length for paired drip laterals facilitates the economic optimization of micro-irrigation systems. The methodologies proposed to date have been based on complicated mathematical procedures that ...
    • Diaphragm valve hydraulic behavior depending on operating pressure 

      Monserrat Viscarri, Joaquín; Rubio, A.; Cots Rubió, Lluís (American Society of Civil Engineers (ASCE), 2019-08-19)
      In this study, a hydraulically operated and diaphragm-actuated type of diaphragm valve using an elastic diaphragm was tested. With this type of valve, the opening fraction depends on the pipeline pressure; thus, it is ...
    • Discriminating crop, weeds and soil surface with a terrestrial LIDAR sensor 

      Andújar, Dionisio; Rueda-Ayala, Victor; Moreno, Hugo; Rosell Polo, Joan Ramon; Escolà i Agustí, Alexandre; Valero, Constantino; Gerhards, Roland; Fernández-Quintanilla, César; Dorado, José; Griepentrog, Hans-Werner (Molecular Diversity Preservation International (MDPI), 2013)
      In this study, the evaluation of the accuracy and performance of a light detection and ranging (LIDAR) sensor for vegetation using distance and reflection measurements aiming to detect and discriminate maize plants and ...
    • Distribuição de líquido da ponta de pulverização com indução de ar e jato excêntrico AIUB 8502 sob diferentes condições 

      Viana, R.G.; Ferreira, L.R.; Rosell Polo, Joan Ramon; Solanelles Batlle, Francesc; Filat, A.; Machado, M.S.; Machado, A.F.L.; Silva, M.C.C. (Sociedade Brasileira da Ciência das Plantas Daninhas, 2010)
      Objetivou-se com este trabalho avaliar a distribuição de líquido da ponta de pulverização com indução de ar e jato excêntrico AIUB 8502 sob diferentes condições operacionais. Foram avaliados perfil individual, vazão, ângulo ...
    • Distribuição volumétrica e espectro de gotas de pontas de pulverização de baixa deriva 

      Viana, R.G.; Ferreira, L.R.; Ferreira, M.C.; Teixeira, M.M.; Rosell Polo, Joan Ramon; Tuffi Santos, L.D.; Machado, A.F.L. (Sociedade Brasileira da Ciência das Plantas Daninhas, 2010)
      Objetivou-se neste trabalho avaliar a distribuição volumétrica e o espectro de gotas das pontas de pulverização de baixa deriva TTI110015, AI110015 e AVI11001 sob diferentes condições operacionais. A distribuição volumétrica ...
    • Diversifying sub-Mediterranean pinewoods with oak species in a context of assisted migration: responses to local climate and light environment 

      Martín Alcón, Santiago; Coll Mir, Lluís; Améztegui González, Aitor (Wiley, 2016)
      Questions How do thermal migration distance and extreme cold events affect seedling emergence and survival in assisted migration schemes in the sub-Mediterranean context? What role does plant provenance play? Can biotic ...
    • Do no-till and pig slurry application improve barley yield and water and nitrogen use efficiencies in rainfed Mediterranean conditions? 

      Plaza Bonilla, Daniel; Cantero-Martínez, Carlos; Bareche Sahún, Javier; Arrúe, José Luis; Lampurlanés Castel, Jorge; Álvaro-Fuentes, Jorge (Elsevier, 2017)
      Tillage and N fertilization strategies including mineral and organic sources need to be studied in combination given their importance on the production cost that farmers face and their potential interaction on crop ...
    • Efectos de un incendio forestal sobre la respuesta hidrológica de la cuenca mediterránea de Arbúcies (cordilleras costeras catalanas, NE España) 

      López Alonso, Raúl; Pérez Gisbert, Antonio; Batalla, Ramon J. (Instituto Nacional de Investigación y Tecnología Agraria y Alimentaria (Espanya), 2004)
      En agosto de 1994 un incendio forestal afectó al 15% de la superficie de la cuenca experimental de la riera de Arbúcies. Se trata de una cuenca mediterránea de 106 km2, en la que predominan las masas de frondosas y los ...
    • Efectos hidrogeomorfológicos aguas abajo de embalses 

      López Alonso, Raúl; Pons Puy, Pere; Batalla, Ramon J. (Colegio de Ingenieros Técnicos de Obras Públicas (Madrid), 2004)
      En este artículo se expone una síntesis del estado del conocimiento sobre los efectos que tienen los embalses en el tramo fluvial aguas abajo de los mismos, en lo referente al régimen hidrológico, el transporte de sedimentos ...
    • Effect of a longitudinal cut on the mechanical properties of small-diameter roundwood of Pinus nigra Arnold 

      Villasante Plágaro, Antonio M.; Fernandez Serrano, Alvaro; Puigdomènech Franquesa, Lluís; Lampurlanés Castel, Jorge; Moliner Gil, David (North Carolina State University, 2016)
      The use of roundwood in structures has drawbacks that include tapering and lack of flatness, which can be overcome by making a longitudinal cut to flatten one side. The aim of this work was to compare the mechanical behavior ...
    • Effect of a lysine depletion-repletion protocol on the compensatory growth of growing-finishing pigs 

      Cloutier, L.; Létourneau Montminy, M.P.; Bernier, J.F.; Pomar Gomà, Jesús; Pomar, Càndido (American Society of Animal Science, 2016-01-08)
      The effect of Lys restriction followed by a repletion period on the performance of growing pigs was studied during 3 feeding phases, each lasting 28 d. A total of 47 castrated male pigs (G Performer 8.0 × Fertilis 25 pigs; ...
    • Effect of vacuum and pressure treatments on the mechanical properties and moisture balance of wood from Pinus sylvestris 

      Villasante Plágaro, Antonio M.; Laina, Ruben; Vignote, Santiago (North Carolina State University, 2016)
      Several works have analyzed the alteration in the mechanical strength of wood after the application of protective substances. However, it remains unclear whether the significant differences obtained are caused by the ...
    • Effluent particle removal by microirrigation system filters 

      Puig Bargués, Jaume; Arbat Pujolràs, Gerard; Barragán Fernández, Javier; Ramírez de Cartagena Bisbe, Francisco (Instituto Nacional de Investigación y Tecnología Agraria y Alimentaria (Espanya), 2005)
      La distribución del número y del volumen de partículas, y la eficiencia de eliminación de las partículas y los sólidos en suspensión de diferentes efluentes y sus filtrados, fueron analizadas para estudiar si los filtros ...
    • Ehrenfest dynamics is purity non-preserving: a necessary ingredient for decoherence 

      Alonso, J. L.; Clemente-Gallardo, Jesús; Cuchí Oterino, J. C.; Echenique, Pablo; Falceto, Fernando (American Institute of Physics, 2012)
      We discuss the evolution of purity in mixed quantum/classical approaches to electronic nonadiabatic dynamics in the context of the Ehrenfest model. As it is impossible to exactly determine initial conditions for a realistic ...