Abstract: A perceptual-learning system and method is used to improve age-related declines in contrast sensitivity. The system and method comprises a processor and monitor, and a first set of instructions executable on the processor configured to familiarize subjects with the system. A second set of instructions are executable on the processor configured for training the subjects.

Abstract: A perceptual-learning system and method is used to improve age-related declines in contrast sensitivity. The system and method comprises a processor and monitor, and a first set of instructions executable on the processor configured to familiarize subjects with the system. A second set of instructions are executable on the processor configured for training the subjects.

Abstract: A gas cylinder coupling and weighing mechanism useful in a carbonated drink dispenser having a gas cylinder. The coupling and weighing mechanism supports the cylinder rotatably within a hood, the hood forming a lever which is biased upwardly by a spring. A full cylinder will pull the hood all the way down. As the cylinder is emptied, the hood will begin to move upward and when the cylinder is empty the hood will be fully upward. Mounted inside the hood is a fitting engaging with a mating fitting on the gas cylinder. The mating fitting is equipped with a pair of arms which are aligned with locking slots contained within the mating fitting which are used to engage pins on the fitting inside the hood when mounting the gas cylinder.