• Powering wireless sensor nodes: primary batteries versus energy harvesting 

      Penella López, María Teresa; Albesa, Joan; Gasulla Forner, Manuel (IEEE, 2009-05-31)
      Text en actes de congrés
      Accés obert
      Wireless sensor networks (WSNs) are increasingly used in many fields. Still, power supply of the nodes remains a challenge. Primary batteries are mainly used but energy harvesting offers an alternative, although not free ...
    • Runtime extension of low-power wireless sensor nodes using hybrid-storage units 

      Penella López, María Teresa; Gasulla Forner, Manuel (2010-03)
      Article
      Accés obert
      The sensor nodes of wireless sensor networks remain inactive most of the time to achieve longer runtimes. Power is mainly provided by batteries, which are either primary or secondary. Because of its internal impedance, a ...