Now showing items 1-6 of 6

    • Algorithms for sink mobility in wireless sensor networks to improve network lifetime 

      Koç, Metin; Körpeoğlu, İbrahim (Springer, 2012-09)
      Sink mobility is an effective solution in the literature for wireless sensor network lifetime improvement. In this paper, we propose a set of algorithms for sink site determination (SSD) and movement strategy problems of ...
    • Balancing energy loads in wireless sensor networks through uniformly quantized energy levels-based clustering 

      Ali, Syed Amjad; Sevgi, Cüneyt; Kocyigit, A. (IEEE, 2010)
      Clustering is considered a common and an effective method to prolong the lifetime of a wireless sensor network. This paper provides a new insight into the cluster formation process based on uniformly quantizing the residual ...
    • A distributed positioning algorithm for cooperative active and passive sensors 

      Gholami, M.R.; Gezici, Sinan; Rydström, M.; Ström, E.G. (IEEE, 2010)
      The problem of positioning a target node is studied for wireless sensor networks with cooperative active and passive sensors. Two-way time-of-arrival and time-difference-of-arrival measurements made by both active and ...
    • Hybrid TW-TOA/TDOA positioning algorithms for cooperative wireless networks 

      Gholami, M.R.; Gezici, Sinan; Ström, E.G.; Rydström, M. (IEEE, 2011)
      The problem of positioning an unknown target is studied for a cooperative wireless sensor network using hybrid two-way time-of-arrival and time-difference-of-arrival measurements. A maximum likelihood estimator (MLE) can ...
    • Metamaterial-based wireless strain sensors 

      Melik, R.; Unal, E.; Perkgoz, N. K.; Puttlitz, C.; Demir, Hilmi Volkan (American Institute of Physics, 2009-07-07)
      We proposed and demonstrated metamaterial-based strain sensors that are highly sensitive to mechanical deformation. Their resonance frequency shift is correlated with the surface strain of our test material and the strain ...
    • Rule-based in-network processing in wireless sensor networks 

      Şanlı, Ö.; Körpeoğlu, İbrahim; Yazıcı, A. (IEEE, 2009-07)
      Wireless sensor networks are application-specific networks, and usually a new network design is required for a new application. In event-driven wireless sensor network applications, the sink node of the network is generally ...