Browsing by Keywords "Radio frequencies"

Now showing items 1-6 of 6

    • Autonomous navigation of robotic units in mobile sensor network 

      Nazlibilek, S. (2012)
      This work is motivated by the problem of detecting buried anti-tank and anti-personnel mines in roads or some border regions. The problem is tried to be solved by use of small mobile robotic sensors and their some abilities ...

    • Cooperative underwater acoustic communications 

      Al-Dharrab, S.; Uysal, M.; Duman, T. (IEEE, 2013)
      This article presents a contemporary overview of underwater acoustic communication (UWAC) and investigates physical layer aspects on cooperative transmission techniques for future UWAC systems. Taking advantage of the ...

    • Human activity recognition using tag-based localization 

      Yurtman, Aras; Barshan, Barshan (IEEE, 2012-04)
      This paper provides a comparative study on the different techniques of classifying human activities using a tag-based radio-frequency (RF) localization system. Non-uniformly-sampled data containing position measurements ...

    • Improving RF safety in MRI by modifying the electric field distribution 

      Eryaman, Yiğitcan; Atalar, Ergin (IEEE, 2011)
      In this work we demonstrate that the radiofrequency (RF) electric field in magnetic resonance imaging (MRI) can be modified in order to enhance patient safety. The heating of metallic devices in MRI is directly related to ...

    • 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 ...

    • Tracking the position and rotational orientation of a catheter using a transmit array system 

      Celik, H.; Mahcicek, D. I.; Senel, O.; Wright, G. A.; Atalar, Ergin (IEEE, 2013)
      A new method for detecting the rotational orientation and tracking the position of an inductively coupled radio frequency (ICRF) coil using a transmit array system is proposed. The method employs a conventional body birdcage ...