All users utilized regular assistive control options (e.g., microswitches or head trackers). Patients (n=14) with severe motor disabilities due to progressive neurodegenerative disorders were trained to use the system prototype under a rehabilitation program carried out in a house-like furnished space. The system is based on a software controller that offers to the user a communication interface that is matched with the individual's residual motor abilities. Here we report on a pilot study in which a system was implemented and validated to allow disabled persons to improve or recover their mobility (directly or by emulation) and communication within the surrounding environment. Thus they can represent the only technology for severely paralyzed patients to increase or maintain their communication and control options. Brain-computer interfaces (BCIs) are systems that can translate brain activity into signals that control external devices. The quality of life of people suffering from severe motor disabilities can benefit from the use of current assistive technology capable of ameliorating communication, house-environment management and mobility, according to the user's residual motor abilities. © 2017 Society of Photo-Optical Instrumentation Engineers (SPIE). A static strain test was then conducted and linear sensor results were observed. In this test, the SV-LLPG served as the swept laser source of an optical frequency-domain reflectometry system used to interrogate a subterahertz range fiber structure (sub-THz-FS) array. Further testing evaluating the sensing utility of the system was conducted. Using this system, linearly chirped laser pulses with a sweep bandwidth of 111.16 GHz were demonstrated. An ADPLL control system was then implemented using an FPGA to lock the output of a Mach-Zehnder interferometer that was directly proportional to laser sweep velocity to an on-board system clock. An open-loop predistortion modulation waveform was calibrated using a feedback iteration method to initially improve frequency sweep linearity. A distributed feedback laser with modulated injection current was used as a swept-frequency laser source. A field-programmable gate array (FPGA)-controlled sweep velocity-locked laser pulse generator (SV-LLPG) design based on an all-digital phase-locked loop (ADPLL) is proposed.
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