Ferroelectric liquid-crystal-based binary optical memory employing feedback.

A two-dimensional bit-oriented refreshing optical memory that is loosely based on the design of an electronic flip-flop is presented. The test system consisted of two amorphous-silicon liquid-crystal optically addressed spatial light modulators placed into an inverting configuration to provide a stable refreshable memory element. A description of the optically addressed spatial light modulator device and its operation is presented.

Pulse oximetry in neonatal medicine.

The safety, accuracy, reliability, noninvasiveness, and ease of use make pulse oximetry a valuable addition to oxygen monitoring of infants in special care nurseries. Such instruments are less sensitive to changes in peripheral circulation or to edema, making them more reliable in sick, physiologically unstable babies and in chronically ill babies with bronchopulmonary dysplasia. In these infants, rapid and accurate measurements of oxygen saturation with such instruments can promote optimal ventilator and oxygen management.

A linear spatio-temporal model of the light-to-bipolar cell system and its response characteristics to moving bars.

A linear spatio-temporal model for the visual pathway from receptor to bipolar cell is presented. This model is based on histological and electrophysiological data obtained from previously published work. The model incorporates the salient linear spatio-temporal dynamic characteristics of the light-to-bipolar cell system, and aims at furthering our understanding of the integrated spatio-temporal response characteristics of this system.