Enviaments recents

  • On the feasibility of noncontact ECG measurements 

    Pallàs Areny, Ramon; Casas Piedrafita, Óscar (2016-03-01)
    Article
    Accés obert
    The article by Kranjec et al. [1], “Novel methods of noncontact heart rate measurement: A feasibility study” is interesting and informative as it compares different contactless methods for heart rate detection. Nevertheless, ...
  • 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 restringit per política de l'editorial
    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 ...
  • On bio activity related signals from contactless electrode measurements 

    Pallàs Areny, Ramon; Casas Piedrafita, Óscar (2016-02-01)
    Article
    Accés restringit per política de l'editorial
    In a recent paper on a displacement current sensor for contactless detection of bio-activity related signals [1], it was stated that “A potential means for human presence detection…is via sensing…human biopotentials” ...
  • Low-power direct resistive sensor-to-microcontroller interfaces 

    López Lapeña, Oscar; Serrano Finetti, Roberto Ernesto; Casas Piedrafita, Óscar (2016-01-01)
    Article
    Accés obert
    This paper analyzes the energy consumption of direct interface circuits where the data conversion of a resistive sensor is performed by a direct connection to a set of digital ports of a microcontroller (µC). The causes ...
  • Entropy characterisation of overstressed capacitors for lifetime prediction 

    Cuadras Tomàs, Àngel; Romero, Ramón; Ovejas Benedicto, Victòria Júlia (2016-12-30)
    Article
    Accés restringit per política de l'editorial
    We propose a method to monitor the ageing and damage of capacitors based on their irreversible entropy generation rate. We overstressed several electrolytic capacitors in the range of 33 µF–100 µF and monitored their entropy ...
  • An algorithm for beat-to-beat heart rate detection from the BCG based on the continuous spline wavelet transform 

    Alvarado Serrano, Carlos; Luna Lozano, Pablo Samuel; Pallàs Areny, Ramon (2016-05-01)
    Article
    Accés restringit per política de l'editorial
    This work describes an algorithm intended to detect the beat-to-beat heart rate from the ballistocardiogram (BCG) obtained from seated subjects. The algorithm is based on the continuous wavelet transform with splines, which ...
  • Calibration-less direct capacitor-to-microcontroller interface 

    López Lapeña, Oscar; Serrano Finetti, Roberto Ernesto; Casas Piedrafita, Óscar (Institution of Electrical Engineers, 2016-02-18)
    Article
    Accés obert
    A new technique to measure a capacitor or a capacitive sensor by means of a direct sensor-to-microcontroller interface circuit that does not need a calibration capacitor is proposed. Basically, the measurement process ...
  • A novel method to obtain proximal plethysmographic information from distal measurements using the impedance plethysmogram 

    Gómez Clapers, Joan; Casanella Alonso, Ramón; Pallàs Areny, Ramon (University of Oslo, 2015-12-23)
    Article
    Accés obert
    We present a novel method to detect proximal volume changes based on the impedance plethysmogram (IPG) measured from limb to limb with two electrode pairs symmetrically placed at distal areas of the upper or the lower ...
  • Design of a low-cost wireless sensor network with UAV mobile node for agricultural applications 

    Polo Cantero, José; Hornero Ocaña, Gemma; Casas Piedrafita, Óscar (2015-11-01)
    Article
    Accés restringit per política de l'editorial
    The aim of the present paper is to propose an agricultural environment monitoring server system utilizing a low-cost Wireless Sensor Network (WSN). Several sensor nodes are scattered in fields several kilometres in size, ...
  • Ballistocardiography and Seismocardiography: A Review of Recent Advances 

    Inan, Omer T; Migeotte, Pierre-François; Park, Kwang-Suk; Etemadi, Mozziyar; Tavakolian, Kouhyar; Casanella Alonso, Ramón; Zanetti, John; Tank, Jens; Funtova, Irina; Prisk, G. Kim; Di Rienzo, Marco (2015-07-01)
    Article
    Accés obert
    In the past decade, there has been a resurgence in the field of unobtrusive cardiomechanical assessment, through advancing methods for measuring and interpreting ballistocardiogram (BCG) and seismocardiogram (SCG) signals. ...

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