Abstract: An intermittent gas-insufflation apparatus insufflates a quantity of the gaseous fluid into an entrance of a respiratory system of a breathing patient during an exhalation interval of an immediate breathing cycle and into a subsequent inhalation interval of a successive breathing cycle. The intermittent gas-insufflation apparatus includes a valve assembly, a sensor and a controller. The valve assembly actuates between a closed state to prevent the gaseous fluid from flowing from a source of gaseous fluid to the patient and an opened state to establish gaseous fluid flow to the patient. The sensor detects changes in breathing pressure of the patient throughout the immediate breathing cycle and to generates sensor signals characteristic of the changes in the breathing pressure thereof.

Abstract: A currency discriminator for determining the denomination of a bank note or the like is disclosed. It includes a source of light directed at the note to be identified. A 2 mm.times.80 mm stripe is illuminated and the reflected light from the illuminated area is measured by a detector and converted into a digital representation. Synchronizing hardware permits 72 samples, each from a 2 mm.times.80 mm area, to be generated as a bank note is moved past the illuminator. The digital representations are then utilized to develop a four bit correlation number N where each bit is a one if (P.sub.n >P.sub.n-2), (P.sub.n >P.sub.n-4), (p.sub.n >P.sub.n-6), and (P.sub.n >P.sub.n-8) where P.sub.n is the present sample and P.sub.n-2, for example, is the second previous sample. The correlation number N is then compared with the corresponding number in a master list for notes of different denomination.