Abstract: Machine learning techniques for estimating an indication of carotid-femoral pulse wave velocity (CFPWV) and/or vascular age (VA) of a subject from an arterial waveform previously measured at a single site by an arterial waveform acquisition device coupled to the subject, the method comprising using at least one computer hardware processor to perform: obtaining the arterial waveform, the arterial waveform comprising a plurality of portions corresponding to a respective plurality of heartbeats of the subject; generating a representative heartbeat waveform from the arterial waveform; and providing the representative heartbeat waveform as input to a trained machine learning model to produce a corresponding output indicative of the CFPWV of the subject.

Abstract: A circuit for operating an electromagnet of a feeder or vibrator incorporate phase control for a triac used for oscillating the feeder at line frequency or at a selectable subharmonic frequency.

Abstract: A programmable parts reorienter and feeder utilizing a fiber-optic array in a sensing head to determine an initial orientation of a part passing through a parts handling unit. The sensing head is coupled to a microprocessor that has been programmed to recognize properly oriented as well as misoriented parts. After determining the initial orientation of the part the microprocessor will direct a reorienter device to either pass the part in the first orientation, orient the part to a preferred orientation or, in some cases, reject the part.

Abstract: A subharmonic controller for a dual coil electromagnetic vibrator, which derives both power and timing from a conventional a.c. line, having a zero crossing detector providing pulses at twice line frequency to a phase control. The phase control provides a selectively variable pulse width and triggers a frequency divider, which in turn triggers a divide-by-two-counter. Pulses from each of the phase control, divider and counter are fed to a logic controller which generates plus and minus gate signals. The gate signals alternately fire a pair of oppositely-directed SCR's, each SCR connected in series with one of the dual coils across the a.c. line. A polarity detector and reset circuit restore the polarity information and synchronize it with the direction of conduction of the SCR's.

Abstract: A synchronized subharmonic controller for a dual coil electromagnetic vibrator, which derives both power and timing from a single phase AC line, having a trigger circuit which operates the coils at one-third the power line frequency. A timing circuit is optically coupled to alternately fire a pair of oppositely-directed SCR's with each SCR connecting one of the coils across the AC line. The optical coupling reduces feedback from the coil circuitry to the timing circuit. A pair of capacitors supply additional power to operate the coils and to reduce the peak values of current supplied by the power line.