Cloud computing is a paradigm for using IT services with characteristics such as flexible and scalable service usage, on-demand availability, and pay-as-you-go billing. Respective services are called cloud services and their nature usually motivates a differentiation in three layers:...

The world keeps on quickly changing and we will probably have to change the laws of the economy. In recent past years the production has dominated the consumptions: today, the consumer is always more, the true judge of the market and the firms of production have to redraw their strategies. The...