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This paper presents the Self-excited Acoustical System (SAS) in elastic construction stress change measurement. The system is based on the acoustical autoresonance phenomena and enables an indirect measurement of the construction effort level. The essence of the SAS system is to use a piezoelectric vibration emitter and a piezoelectric vibration receiver placed at a distance, which are coupled with...
In the paper there describes brain - computer interface, controlled by Steady - State Visual Evoked Potentials (SSVEP). This potentials are natural responses to visual stimulus ranging from 3.5 Hz to 75 Hz. In this work to elicit the SSVEP was used LED display consisting of four fields different flickering frequencies (28, 30, 32 and 34 Hz). Commercially available Emotiv EPOC neuroheadset was used...
The use of Hierarchical Systems (HS) technology in conceptual design of BCI is proposed in the work. Being biomechatronic by nature BCI system contains, biological (brain), computer, visual informatics (LCD, GUI), electronic (sensors) and executive mechanical (mobile robot) or virtual mechanical (virtual keyboard) subsystems. So, conceptual model of the BCI system being designed should contain connected...
The paper describes a virtual keyboard based on a brain - computer interface, controlled by Steady - State Visual Evoked Potentials (SSVEP). Steady-State Visual Evoked Potentials are natural responses when the retina is excited by a visual stimulus ranging from 3.5 Hz to 75 Hz. The SSVEPs are characterized by an increase in EEG activity around the stimulus frequency. The SSVEP component has been detected...
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