This week there are two important stories, both relating to Stephen Hawking and to topics we have discussed previously in class. The first involves an upgrade to the system he uses to communicate, and the second is a dire warning from the man himself.

First, regarding the system he uses to communicate. For the first time in twenty years, it has received a major overhaul in how it operates. The story was all over the place, however none of the articles about it did a very good job in discussing how it actually works. Instead, they all mentioned a cheek-operated switch attaches to an infrared sensor on his glasses that lets him use the system. That’s a non-explanation, and even the person involved directly with the process did a terrible job of explaining it as you can see in the video on this USA Today page, so hopefully I can add some additional detail that will help explain how it operates.

It’s true that because of his affliction he only has relative control over the muscles in his cheek, and that is how he interacts with his PC. Via an infrared switch on his cheek, which communicates with an infrared receiver on his glasses that then sends a signal to a USB key on the bottom of his wheelchair that then communicates the choice to the PC, he can make selections on a screen. You can see the sensor in his picture below, and it works like this: