Ara es mostren els items 115-127 de 127

    • Technical specifications and system architecture of a compact weather station for rice blast field study 

      Pallàs-Areny, Ramon; Casas Piedrafita, Óscar; López Lapeña, Oscar; Hornero Ocaña, Gemma; Serrano Finetti, Roberto Ernesto; Quílez Figuerola, Marcos; Polo Cantero, José; Cuadras Tomàs, Àngel; PEREIRAS, Jaime; PUIGDOLLERS, Pau (2014-03-17)
      Report de recerca
      Accés restringit per acord de confidencialitat
      This report describes the work carried out as part of an EC-funded project called RICE-GUARD, which is developing a novel rice blast prediction tool based on an in-field wireless sensor network. Existing systems for ...
    • The effect of respiration-induced heart movements on the ECG 

      Pallàs-Areny, Ramon; Colominas i Balagué, Josep; Rosell Ferrer, Francisco Javier (IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC, 1989-06-01)
      Article
      Accés obert
      We present a model describing the rotation of the cardiac vector as a possible mechanism resulting in the presence of respiratory information in the ECG. The way in which this information is revealed is analyzed and the ...
    • The floating capacitor as a differential building block 

      Gasulla Forner, Manuel; Jordana Barnils, José; Pallàs-Areny, Ramon; Torrents Dolz, Josep M. (IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC, 1998-02-28)
      Article
      Accés obert
      This paper analyzes the advantages and limitations of using the floating- (or flying-) capacitor technique as a building block with differential input and either differential or single-ended output to implement voltage ...
    • The QT scale: a weight scale measuring the QTc interval 

      Couderc, Jean-Philippe; Beshaw, Connor; Xiaodan, Niu; Serrano Finetti, Roberto Ernesto; Casas Piedrafita, Óscar; Pallàs-Areny, Ramon; Rosero, Spencer; Zareba, Wojciech (Wiley, 2017-01)
      Article
      Accés obert
      Despite the strong evidence of the clinical utility of QTc prolongation as a surrogate marker of cardiac risk, QTc measurement is not part of clinical routine either in hospital or in physician of fi ces. We evaluated ...
    • The seemingly paradoxical noise behavior of some active circuits 

      Vargas Drechsler, Manuel; Pallàs-Areny, Ramon (IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC, 1994-10-01)
      Article
      Accés obert
      The equivalent input noise for some active circuits does not increase when the signal bandwidth increases or when some of their resistors have a larger value. This seemingly paradoxical behavior is caused by the different ...
    • Thermal noise in a finite bandwidth 

      Vargas Drechsler, Manuel; Pallàs-Areny, Ramon (IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC, 2001-12-31)
      Article
      Accés obert
      In a practical circuit, the output noise due to the thermal noise of a resistor will depend on the actual transfer function of the noise source. The bandwidth will never be infinite because the transfer function of either ...
    • Towards the standardization of ballistocardiography systems for J-peak timing measurement 

      Gómez Clapers, Joan; Serra Rocamora, Albert; Casanella Alonso, Ramón; Pallàs-Areny, Ramon (2014-09-16)
      Article
      Accés obert
      There is a growing interest in accurately measuring the timing of the J peak of the ballistocardiogram (BCG) in order to obtain cardiovascular function markers non-invasively, especially in modern home healthcare applications. ...
    • Transient reduction in pulse-based impedance measurements 

      Aliau-Bonet, Carles; Pallàs-Areny, Ramon (SARTI, 2013)
      Article
      Accés obert
    • Transient Reduction in pulse-based impedance measurements, 

      Aliau Bonet, Carles; Pallàs-Areny, Ramon (2013)
      Text en actes de congrés
      Accés obert
      Impedance measurements based on voltage pulse injection and current detection are faster and easier to implement than measurements based on sine waves, but transients produced in the current-to-voltage conversion may lead ...
    • Uncertainty analysis in two-terminal impedance measurements with residual correction 

      Torrents Dolz, Josep M.; Pallàs-Areny, Ramon (Institute of Electrical and Electronics Engineers, 2001-05)
      Text en actes de congrés
      Accés obert
      Residual impedance correction in impedance analyzers when using an asymmetrical test fixture needs three reference measurements, usually open circuit, short circuit, and load (meaning an impedance close to the impedance ...
    • Uncertainty factors in time-interval measurements in ballistocardiography 

      Gomez-Clapers, Joan; Serra-Rocamora, Albert; Casanella Alonso, Ramón; Pallàs-Areny, Ramon (SARTI, 2013)
      Article
      Accés obert
    • Uncertainty factors in time-interval measurements in ballistocardiography 

      Gómez Clapers, Joan; Serra Rocamora, Albert; Casanella Alonso, Ramón; Pallàs-Areny, Ramon (2013)
      Text en actes de congrés
      Accés restringit per política de l'editorial
      There is a growing interest on measuring time intervals between the J peak of the ballistocardiogram (BCG) and several features of other cardiovascular signals such as the ECG in order to obtain cardiovascular function ...
    • Variations in breathing patterns increase low frequency contents in HRV spectra 

      García González, Miguel Ángel; Vázquez Seisdedos, Carlos; Pallàs-Areny, Ramon (Institute of Physics Publishing, 2000)
      Article
      Accés obert
      This paper shows that variations in breathing patterns broaden heart rate variability (HRV) spectral bands and increase the power amplitude of low-frequency bands. Because of these influences, spectral markers for HRV ...