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Ara es mostren els items 11442-11461 de 245487

    • Air volume elements for distribution of pressure in air cushion membranes 

      Bellmann, Juergen (CIMNE, 2011)
      Text en actes de congrés
      Accés obert
      This paper describes techniques and presents examples for nonlinear finite element analysis on membranes interacting with an air volume.

    • Air-pinch PWM valve to regulate flow rate of hollow-cone nozzles for variable-rate sprayers 

      Zhu, Heping; Jeon, Hongyoung; Salcedo Cidoncha, Ramón; Ozkan, Erdal; Román, Carla; Gil Moya, Emilio (2023-01-01)
      Article
      Accés restringit per política de l'editorial
      Electric pulse width modulation (PWM) solenoid valves are commonly used to regulate nozzle flow rates to achieve precision variable-rate spray applications. However, some pesticide formulations, such as wettable powders ...

    • Air-Sea interaction over the Gulf Stream in an ensemble of HighResMIP present climate simulations 

      Bellucci, Alessio; Athanasiadis, Panos J.; Scoccimarro, Enrico; Ruggieri, Paolo; Gualdi, Silvio; Fedele, Giusy; Haarsma, Reindert J.; García Serrano, Javier; Castrillo, Miguel; Putrahasan, D.; Sanchez-Gomez, Emilia; Moine, Marie-Pierre; Roberts, Christopher D.; Roberts, Michael J.; Seddon, J; Vidale, Pier Luigi (Springer Link, 2021)
      Article
      Accés obert
      A dominant paradigm for mid-latitude air-sea interaction identifies the synoptic-scale atmospheric “noise” as the main driver for the observed ocean surface variability. While this conceptual model successfully holds over ...

    • Airborne bistatic SAR receiver with the capability of use different opportunity transmitters 

      Merlano Duncan, Juan Carlos; López Dekker, Francisco J.; Mallorquí Franquet, Jordi Joan; Duque Biarge, Sergio (2008)
      Text en actes de congrés
      Accés obert
      This paper describes the design and construction of a bistatic SAR receiver suitable for airborne applications, using orbital SAR systems (ENVISAT, ERS-2, RADARSAT, TerraSAR-X among others) as opportunity transmitters. The ...

    • Airborne Collision Avoidance System (ACAS) 

      Berenguer Sau, Jordi; Mateu Mateu, Jordi (Universitat Politècnica de Catalunya, 2016-10)
      Apunts
      Accés obert

    • Airborne GNSS-R wind retrievals using delay-doppler maps 

      Rodriguez Alvarez, N.; Akos, D.M.; Zavorotny, Valery U.; Smith, Jeffrey; Camps Carmona, Adriano José; Fairall, C.W. (Institute of Electrical and Electronics Engineers (IEEE), 2013-01)
      Article
      Accés restringit per política de l'editorial
      Global navigation satellite system (GNSS) reflectometry has emerged recently as a promising remote sensing tool to retrieve various geophysical parameters of the Earth's surface. GNSS-reflected signals, after being received ...

    • Airborne GNSS-R, thermal and optical data relationships for soil moisture retrievals 

      Sánchez, Nilda; Alonso Arroyo, Alberto; González Zamora, Ángel; Martinez Fernandez, Jose; Camps Carmona, Adriano José; Vall-Llossera Ferran, Mercedes Magdalena; Pablos Hernández, Miriam; Herrero Jimenez, Carlos M. (Institute of Electrical and Electronics Engineers (IEEE), 2015)
      Comunicació de congrés
      Accés restringit per política de l'editorial
      New remote sensing techniques based on the analysis of the Earth's surface-reflected signal from the Global Navigation Satellite Systems (GNSS-Reflectometry, or GNSS-R in short) are emerging. Soil moisture and vegetation ...

    • Airborne GNSS-R: A key enabling technology for environmental monitoring 

      Pérez Portero, Adrián; Muñoz Martin, Joan Francesc; Hyuk, Park; Camps Carmona, Adriano José (Institute of Electrical and Electronics Engineers (IEEE), 2021)
      Article
      Accés obert
      Weather forecast using GNSS-R relies, to a large extent, on data acquired by airborne and spaceborne platforms due to the extended coverage that can be achieved. GEO satellites can retrieve measurements over large areas ...

    • Airborne ionospheric gradient monitoring for dual-frequency GBAS 

      Gerbeth, Daniel; Caamaño Albuerne, María; Circiu, Mihaela-Simona; Felux, Michael (Curran Associates, Inc., 2022)
      Text en actes de congrés
      Accés obert
      Certified Ground Based Augmentation Systems (GBAS) as of today operate using only GPS signals in the L1 frequency band to enable precision approach guidance for landing aircraft. Ionospheric activity (i.e., scintillations ...

    • Airborne pollen parameters and their relationship with meteorological variables in NE Iberian Peninsula 

      Majeed, Husam Tareq; Periago Oliver, M. Cristina; Alarcón Jordán, Marta; Belmonte, Jordina (2018-05-23)
      Article
      Accés obert
      The present study explores the role of the meteorological variability in the pollen production and the timing of the airborne pollen season by analysis of the correlation between precipitation, insolation and temperature ...

    • Airborne spray drift measurement using passive collectors and lidar Systems 

      Gregorio, Eduard; Solanelles, Francesc; Rocadenbosch Burillo, Francisco; Rosell Amigó, Juan Ramón; Sanz, Ricardo (2009)
      Comunicació de congrés
      Accés restringit per política de l'editorial
      Minimization of the risk associated with spray applications requires a proper understanding of the spray drift phenomenon. This fact has led to the development of several techniques to measure the deposition on horizontal ...

    • Airborne wind retrieval using GPS delay-Doppler maps 

      Zavorotny, Valery; Rodríguez, Nereida; Akos, D.M.; Camps Carmona, Adriano José (Institute of Electrical and Electronics Engineers (IEEE), 2012)
      Text en actes de congrés
      Accés restringit per política de l'editorial
      Global Navigation Satellite System Reflectometry (GNSSR) has emerged recently as a promising remote sensing tool to retrieve various geophysical parameters of Earth’s surface. GNSS-reflected signals, after being received ...

    • Aircraft annoyance minimization around urban airports based on fuzzy logic 

      Quevedo Casín, Joseba Jokin; Prats Menéndez, Xavier; Nejjari Akhi-Elarab, Fatiha; Puig, Vicenç (GERAD; École Polytechnique de Montréal; Cadi Ayyad University, 2007-05)
      Text en actes de congrés
      Accés obert
      This paper presents a strategy based on fuzzy logic and lexicographic multi-objective optimization for designing noise abatement procedures aimed at reducing the noise exposure of the population living around the airports. ...

    • Aircraft cabin layout check - Development of a tool for the adaptation of aircraft loading in case of shear exceedances 

      Biel Simón, Adrià (Universitat Politècnica de Catalunya, 2024-02-15)
      Treball Final de Grau
      Accés restringit per acord de confidencialitat
      Airbus currently offers a wide range of cabin configurations, fuel tanks and cargo compartments for each of its aircraft models. All these configuration differences must be subjected to an amount of studies to ensure the ...

    • Aircraft Charging and its Influence on Triggered Lightning 

      Pavan, C.; Fontanes Molina, Pol; Urbani, Michele; Nguyen, Ngoc-Cuong; Martínez Sánchez, Manuel; Peraire Guitart, Jaume; Guerra García, Carmen; Montañá Puig, Juan (2020-01-16)
      Article
      Accés obert
      This paper reports on a laboratory experiment to study the effect of vehicle net charge on theinception of a positive leader from an aircraft exposed to high atmospheric electric fields. The experimentmodels the first stage ...

    • Aircraft clouds: from chemtrail pseudoscience to the science of contrails 

      Mazón Bueso, Jordi; Costa, Marcel; Pino González, David (2018-04-03)
      Article
      Accés obert
      The most frequent statements and arguments found in pseudoscience websites and forums supporting the existence of so-called aircraft chemtrails can be refuted with a scientific explanation of the processes resulting in the ...

    • Aircraft conflict detection using data mining and statistical tools 

      Perez Font, Marc (Universitat Politècnica de Catalunya, 2016-10-28)
      Treball Final de Grau
      Accés obert
      Nowadays and taking into account the different indicators and the forecast of the air traffic volume from Eurocontrol, it is accepted the idea that the traffic will be doubled by 2030, that is why it is so important ...

    • Aircraft dynamic loads generated in wake vortex encounters 

      Suñer Perucho, Carles (Universitat Politècnica de Catalunya, 2014-06-12)
      Projecte Final de Màster Oficial
      Accés obert
      Realitzat a/amb:   Airbus Defence and Space
      The study illustrated in these pages was developed in the Structural Dynamics and Aeroelasticity Department of the Military Aircraft division of Airbus Defence and Space in Getafe, Madrid (Spain). That department is a ...

    • Aircraft localization using a passive acoustic method. Experimental test 

      Martín Román, Sara-Regina; Genesca Francitorra, Meritxell; Romeu Garbí, Jordi; Clot Razquin, Arnau (2016-01)
      Article
      Accés obert
      A passive acoustic method for aircraft localization is experimentally tested in this paper. The method relies on the Doppler effect influencing the signals received by a mesh of microphones distributed over the acoustic ...

    • Aircraft noise-monitoring according to ISO 20906: evaluation of uncertainty derived from the human factors affecting event detection 

      Asensio, Alberto; Ausejo, Miguel; Kambrosic, Kristian; Kang, Jiang; Moschioni, Giovanni; Pagán, R.; Pavón, I.; Romeu Garbí, Jordi; Trujillo, J. A.; Vigano, Giacomo; Ruiz Delgado, Manuel; Recuero López, Manuel (2012)
      Article
      Accés restringit per política de l'editorial
      One of the most important issues in aircraft noise monitoring systems is the correct detection and marking of aircraft sound events through their measurement profiles, as this influences the reported results. In the recent ...