Electronic communications and environmental control systems for the severely disabled.

A wireless environmental controller is described. The controller can either be used by itself or with other systems. It is suggested that commercially available personal computers, for environmental control and communication, will enable the severely disabled to lead a more independent life and may provide useful mental recreation.

Standardizing 125I sources and determing 125I counting efficiencies of well-type gamma counting systems.

I describe the technique for determining the absolute decay rate of any 125I source. The problems of varying counting efficiency, varying sample geometry, and extended sources are discussed. By using the calibrated 125I source, the counting efficiency of the given counting system was obtained.