Evolvable hardware (EHW) refers to hardware whose architecture/structure and functions change dynamically and autonomously in order to improve its performance in carrying out tasks. The emergence of this field has been profoundly influenced by the progress in reconfigurable hardware and evolutionary computation. Traditional hardware can be inflexible--the structure and its functions are often impossible to change once it is created. However, most real world problems are not fixed--they change with time. In order to deal with these problems efficiently and effectively, different hardware...