The technical changes that have changed the world

There is no official inventor of the phone, but already in 1959 the science fiction writer Arthur C. Clarke foresaw the invention of "a small and compact transceiver so that everyone would have a scope with it." Even in the classic series of science fiction (Star Trek) one could see personal devices for communication. Racing with the fiction, the real world got busy to catch up and in 1973 introduced the first mobile phone. Today, the smartphone is a tool by which many of us never separate, and we can no longer imagine our life without it.

Electronic travel aid for blind people

Many studies are made to find a better way to assist the autonomous walking of blind people. The more diffuse and simple instrument used today is still the white cane although the great research made on the electronic travel aids (ETA). These devices have the task to assist blind people to intercept obstacles on their path. The common technologies used for this task are: Camera, GPS, Wireless sensor networks and ultrasonic and infrared sensors.