Patient Satisfaction with a Tertiary Hospital in Egypt using a HCAHPS-Derived Survey.

Study Design: Retrograde cross-sectional study.

Objective: To assess patient satisfaction and outcomes in polytraumatized patients in EL-Demerdash hospital.

Background: This is the first study that assessed patient satisfaction with a tertiary hospital in Egypt.

Modeling framework for piezoelectrically actuated MEMS tunable lenses.

WWe report a modeling framework for evaluating the performance of piezoelectrically actuated MEMS tunable lenses. It models the static opto-electromechanical coupling for symmetric configurations of piezoelectric actuators based on the laminated-plate theory, linear piezoelectricity, and ray tracing. With these assumptions, it helps to find geometrical parameters for actuators on clamped square or circular diaphragms that give a diffraction-limited tunable lens with minimum F-number.