Here's a good use for technology - GPS shoes to track Alzheimer's patients. A new shoe has been developed with a GPS chip which will offer peace of mind to caregivers and relatives of people who suffer from this tragic disease. The units are accurate to within 10 metres and can be used in conjunction with "geo fences" so if the person wearing the shoes leaves a designated area, an alert is sent out. This will certainly make finding people easier - and can have much wider uses - and users! (Heaven knows we could have used it 20 years ago when my grandmother went missing and finally showed up several hours later - luckily spotted by someone who knew her and the family; she was in a part of town where none of us had, or would have thought to have, looked.)
Hmmm ... or perhaps the shoe phone might have worked - although maybe the person might have just wondered where the ringing was coming from.