Recent Submissions

  • 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
    Restricted access - publisher's policy
    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
    Open Access
    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. ...
  • Smart lighting system ISO/IEC/IEEE 21451 compatible 

    Higuera Portilla, Jorge Eduardo; Hertog, Wim; Polo Cantero, José; Perálvarez Barrera, Mariano; Carreras Quilis, Josep M. (2015-05-01)
    Article
    Open Access
    Smart lighting systems go far beyond merely replacing lamps. These modern systems are now able to reproduce arbitrary spectra, color temperatures, and intensities and pivot on smart sensors and actuators incorporating ...
  • A wireless augmentative and alternative communication system for people with speech disabilities 

    Hornero Ocaña, Gemma; Quílez Figuerola, Marcos; Casas Piedrafita, Óscar (Institute of Electrical and Electronics Engineers (IEEE), 2015-08-19)
    Article
    Open Access
    An augmentative and alternative communication (AAC) device for people with speech disabilities is presented. This AAC system exhibits the advantages of two currently used systems: 1) usability of the communication boards ...
  • Irreversible entropy model for damage diagnosis in resistors 

    Cuadras Tomàs, Àngel; Crisóstomo, Javier; Ovejas Benedicto, Victòria Júlia; Quílez Figuerola, Marcos (American Institute of Physics (AIP), 2015-10-28)
    Article
    Open Access
    We propose a method to characterize electrical resistor damage based on entropy measurements. Irreversible entropy and the rate at which it is generated are more convenient parameters than resistance for describing damage ...
  • Determination of a System’s Entropy Using Pyroelectric Sensors 

    Cuadras Tomàs, Àngel; Ovejas Benedicto, Victòria Júlia (2015-12)
    Article
    Open Access
    We propose a system for measuring entropy variations, S, in thermal systems using pyroelectric sensors. These sensors convert time-dependent temperature variations into electrical current. Consequently, heat and ...
  • On bio-activity related signals from contactless electrode measurements 

    Pallàs Areny, Ramon; Casas Piedrafita, Óscar (2015)
    Article
    Open Access
  • A fast method to estimate body capacitance to ground at mid frequencies 

    Aliau Bonet, Carles; Pallàs Areny, Ramon (University of Oslo, 2015-12-18)
    Article
    Open Access
    Impedance measurements that involve the human body are affected by the capacitance between the body and earth ground. This paper describes a fast method to estimate that apacitance at 10 kHz, which is valid for impedance ...
  • Automatic Concealed Heart Rate Detection from the BCG in Seated Position 

    Luna Lozano, P. S.; Pallàs Areny, Ramon (2015-03-01)
    Article
    Open Access
    Continuous monitoring of health state is important in elder and chronically ill (but otherwise not critical) patients. Ideally, the patient should not be aware of being continuously monitored. This study describes an ...
  • Effects of stray capacitance to ground in bipolar material impedance measurements based on direct-contact electrodes 

    Aliau Bonet, Carles; Pallàs Areny, Ramon (2014-10-01)
    Article
    Restricted access - publisher's policy
    Bipolar material impedance measurements are easier to implement than tetrapolar measurements but are more affected by electrode impedance. This effect can be reduced by measuring at a high-enough frequency albeit with the ...

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