1.1 COMMUNICATION WHILE TRAVELLING The pace of our daily life has been increasing for several decades. Our needs have multiplied as new products have appeared and then been replaced after a few years, or even months, of existence by a more fashionable product or one of higher performance. The life cycles of the technologies used in consumer and professional electronic products are also becoming shorter. This acceleration is an inherent fact of our consumer society. and the relationship between people and machines are Lifestyles due to the multiplicity of ephemeral consumer products. Objects...