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Daily use of electroencephalogram (EEG) could increase the effectiveness for medical applications. However, current brain monitoring technologies lack one or more characteristics necessary for daily use, such as portability, responsiveness or versatility. In this study we developed a portable prototype for high resolution real-time EEG monitoring fully integrated system. The prototype is composed...
It is generally difficult to estimate surface and deep layer muscle activity using surface electrodes. Because, EMG signals that was measured by surface electrode is sum of the signals that are observed in the close of the electrode. Thus, the mixture of surface layer muscle signal and deep layer muscle signal are observed. In previous study, we focused on propagation direction of EMG signal, and...
A novel multi-degree-of-freedom (MDOF) microactuator was developed using a symmetric piezoelectric plate and a Ni-Co alloy micro-pusher element. A LIGA-like technique was employed to manufacture a Ni-Co alloy micro-pusher with a Vickers hardness value (HV) of 550, which was then attached at the midpoint of the long side of a piezoelectric plate with dual electrodes to construct a symmetric piezoelectric...
The general operation of a piezoelectric ultrasonic actuator is to convert the cyclic motion of the piezoelectric plate to a linear motion at the rotor or slider. The conventional piezoelectric ultrasonic actuator has two symmetric exciter electrodes on the front surface and each electrode covers one half of the front surface. The rear surface has only one electrode that severs as a common drain....
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