We describe the hardware and software for the control of prehension for a dexterous transradial prosthesis. The prehension process comprises hand orientation (three degrees of freedom) and the opening of the hand in a manner that is appropriate for the shape and size of the object. The hardware consists of a standard web camera, accelerometer, ultrasound distance sensor, laser pointer and an LED illumination system. Software operating in real time estimates the shape and size of the object as well as the relative orientation of the hand with respect to the object. Based on this data, the controller generates signals that are sent to the three-dimensional (3D) wrist rotator, and drives which control fingers and thumb of the transradial prosthesis, thereby preparing the hand for palmar, lateral, or precision (2-digit or 3-digit) grasps. The choice of the grasp follows heuristics captured from healthy humans when grasping and expressed in the form of IF-THEN rules
Construction and characterization of a simple but flexible, low cost diode laser system for the excitation of carbon quantum dots as a treatment method for ocular cancers is reported. System was designed to deliver maximal amount of laser diode radiant flux to the eye of the test mice using optical cable. Detailed electronic circuit layouts of the laser diode voltage controller, supplying maximum 3 V of voltage with 20 mV resolutions, and functional description of all other components (optical cable delivery system and supporting console) are given. The system features visual signalization when the laser diode module is powered. Since the laser diode radiant flux is directly dependent on the input voltage, measurement was performed in order to obtain approximation function of this dependency. Purpose of this function is to eliminate radiant flux measurement before each experiment which requires controlled conditions Keywords -carbon quantum dots, laser excitation, laser diode assembly, voltage control, radiant flux or e Klisi is with the
The electrical stimulation systems, for the needs of artificial ventilation are in the grater or lesser extent, in commercial use since 1970's. Apart from development of new methods of stimulation and hardware solutions, the key role in development of such systems is reliable detection of phases during breathing. This paper gives the review of stimulation methods, physiology of respiratory system and one of the possible solutions, proposed by the authors.
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