Enviaments recents

  • Simulation study of tandems of perovskite and IBC c-Si solar cells 

    Silvestre Bergés, Santiago; Mas-Marza, Elena; Puigdollers i González, Joaquim; Fabregat Fillet, Jaume; Ortega Villasclaras, Pablo Rafael; Serra, Danielle (WIP Renewable Energies, 2018)
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    In this work, the simulation results obtained for a tandem configuration of perovskite, as top cell, and Interdigitated Back-Contacted (IBC) c-Si as bottom cell are presented. Two different models were used for the modelling ...
  • On the effects of free-stream turbulence intensity in the fluid flow and heat transfer from a sphere at subcritical Reynolds numbers 

    Rodríguez Pérez, Ivette María; Lehmkuhl, Oriol; Soria Guerrero, Manel; Gomez, Samuel; Domínguez Pumar, Manuel; Kowalski, Lukasz (2018)
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    In this work, the effect of the free-stream turbu-lence on the heat transfer and the near wake behind a sphere is studied at moderate Reynolds numbers of ¿¿ ¿ ¿¿¿¿ and ¿¿ ¿ ¿¿¿. Turbulence delays the sep-aration of the ...
  • Delfos, un recurs interactiu per l'estudi de dispositius electrònics 

    Calderer Cardona, Josep; Prat Viñas, Lluís; Jimenez Serres, Vicente; Pons Nin, Joan (Universitat de Barcelona. Edicions i Publicacions, 2006)
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    Es presenta un programa interactiu per a un curs bàsic de dispositius semiconductors suportat per ordinador personal. Els destinataris primers són els alumnes de la titulació de segon cicle en Enginyeria Electrònica de la ...
  • Applications of hot film anemometry to space missions 

    Jimenez Serres, Vicente; Domínguez Pumar, Manuel; Ricart Campos, Jordi; Kowalski, Lukasz; Navarro, Sara; torres, josefina; Castañer Muñoz, Luis María (VDE Conference Publications, 2008)
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    In this paper the most important constraints of the wind sensors for the Martian atmosphere are described, along with an overview of the past successful designs. Practically all the data available today about the Martian ...
  • Model identification of time-varying diffusive systems 

    Atienza García, María Teresa; Kowalski, Lukasz; Gorreta Mariné, Sergio; Pons Nin, Joan; Jimenez Serres, Vicente; Domínguez Pumar, Manuel (2018)
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    This paper presents a characterization method based on diffusive representation for a class of linear or nonlinear time-varying diffusive systems. The system variation with time may come as a result of the own actuation ...
  • On some properties of the output of a pulsed digital oscillator working with multiple resonances 

    Blokhina, Elena; Feely, Orla; Ricart Campos, Jordi; Domínguez Pumar, Manuel (Institute of Electrical and Electronics Engineers (IEEE), 2010)
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    In this paper, we study the possible output of the pulsed digital oscillator (PDO) with multiple resonant modes of the mechanical resonator in the feedback loop. PDOs are simple circuits that allow linear resonators to ...
  • Design and test of resonators using PiezoMUMPS technology 

    Pons Nin, Joan; Gorreta Mariné, Sergio; Domínguez Pumar, Manuel; Blokhina, Elena; O'Connell, D.; Feely, Orla (Institute of Electrical and Electronics Engineers (IEEE), 2015)
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    This paper presents preliminary results obtained with devices fabricated with the new PiezoMUMPS process. Since these devices will be used as resonators in applications based on Pulsed Digital Oscillators, we analyze, both ...
  • P3R-3 design and characterization of air coupled ultrasonic transducers based on MUMPs 

    Martínez Graullera, Óscar Fernando; Martín Arguedas, Carlos Julián; Gómez-Ullate Alvear, Luis; Domínguez Pumar, Manuel (Institute of Electrical and Electronics Engineers (IEEE), 2007)
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    This paper deals with the design and characterization of several capacitive micromachined ultrasonic transducer (cMUT) cells for the future design of an air-coupled transducer for non destructive testing (NDT). Each design ...
  • Pulsed digital oscillators 

    Domínguez Pumar, Manuel; Ricart Campos, Jordi; Pons Nin, Joan; Rubio, Felix (Institute of Electrical and Electronics Engineers (IEEE), 2008)
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    The objective of this paper is to collect the main latest results on pulsed digital oscillators. Rigorous and experimental results are presented that show what kind of sequences are at their output, the relation between ...
  • Characterization method of the dynamics of the trapped charge in contactless capacitive MEMS 

    Gorreta Mariné, Sergio; Pons Nin, Joan; Domínguez Pumar, Manuel; Blokhina, Elena; Feely, Orla (Institute of Electrical and Electronics Engineers (IEEE), 2015)
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    Dielectric charging of insulating films in microelectromechanical systems (MEMS) has a crucial effect on the operation of those devices. A new method is presented in order to characterize the dynamics of the charge trapped ...
  • Light source position microsensor 

    Quero Reboul, Jose Manuel; Guerrero Conejo, Antonio Francisco; Garcia Franquelo, Leopoldo; Domínguez Pumar, Manuel; ameijeiras, iñaki; Castañer Muñoz, Luis María (Institute of Electrical and Electronics Engineers (IEEE), 2001)
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    There exist industrial applications where an accurate estimation of a light source position is needed. That is the case for a heliostat, a device that projects sunlight upon a focus hundreds of meters distant. In this paper ...
  • On the boundary layer development and heat transfer from a sphere at moderate Reynolds numbers 

    Rodríguez Pérez, Ivette María; Lehmkuhl, Oriol; Soria Guerrero, Manel; Gómez, Samuel; Domínguez Pumar, Manuel; Kowalski, Lukasz (2018)
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    Direct and large-eddy numerical simulations have been performed for a heated sphere at Reynolds numbers 200, 300, 500, 750, 1000 and 104, in the context of the development of a spherical wind sensor for Mars atmosphere ...

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