Weakly electric fish emit an AC electric field into the water and use thousands of sensors on the skin to detect field perturbations due to surrounding objects. The fish's active electrosensory system allows them to navigate and hunt, using separate neural pathways and receptors for resistive and capacitive perturbations. We have previously developed a sensing method inspired by the weakly elec...

This paper presents a low-actuation-voltage micro-electromechanical system (MEMS) capacitive shunt switch which has a very large bandwidth (4 GHz to 24 GHz). In this work, the isolation of MEMS switch is improved by adding two short high impedance transmission lines at the beginning and end of a coplanar waveguide (CPW). Simulating the switch demonstrates that a return loss (S11) is less than -...

Impedance response of zinc and galvanized steel samples exposed in wet-dry cyclic condition using 0.05 M NaCl solution has been analyzed in order to evaluate their corrosion behavior. The wet-dry cyclic test was performed by exposing sample to alternate conditions of 1 h immersion in 0.05 M NaCl solution and 7 h drying at 298 K with relative humidity (RH) of 60% for 10 days consisting of 30 cyc...

Capacitive input devices are becoming increasingly prevalent in consumer devices. This paper presents the hardware and algorithms for the low cost implementation of a capacitive 2.5D input device. The low cost and low power consumption of the device make it suitable for use in portable devices such as cellular phones. The electrical properties used are such that the preexisting snap dome techno...

The interaction of capacitive and resistive nonlinearities in the Chua’s circuit is studied. The original Chua’s circuit is modified by replacing one of the linear capacitors with a nonlinear one to investigate the effects of such an interaction on the chaotic behavior of the circuit. It is found that such an interaction can be effective in limiting and controlling chaos. The Pspice simulation ...

Composite electrodes of polyaniline/MnO2-Multi walled carbon nanotube (PANI/MnO2-MWCNT), MnO2-MWCNT nanocomposites and MWCNT was produced by the in situ direct coating approach. The supercapacitor performance of the nanocomposites was studied by Fourier transform infrared (FT-IR) spectroscopy and scanning electron microscopy (SEM). The electrochemical properties of electrodes were also investig...

OF DOCTORAL DISSERTATION AALTO UNIVERSITY SCHOOL OF SCIENCE AND TECHNOLOGY P.O. BOX 11000, FI-00076 AALTO http://www.aalto.fi Author Matti Paavola Name of the dissertation Manuscript submitted May 24, 2010 Manuscript revised August 24, 2010 Date of the defence October 1, 2010 Article dissertation (summary + original articles) Monograph Faculty Department Field of research Opponent(s) Supervisor...

Silicon Laboratories' capacitive sensing techniques are compatible with external ESD protection methods. Designers should be aware of parasitic parameters in these circuits which affect capacitive sensing performance when implementing these protection methods. While most of the methods affect sensing performance in some way, in almost all cases an acceptable balance between performance, protect...