A second network, (140) connectable to a first network (130), the first network (130) comprising a plurality of first nodes (130a, 130b, . . . , 130x), each first node (130a, 130b, . . . , 130x) configured to have a plurality of inputs (132a, 132b, . . . , 132x), configured to produce an output (134a, 134b, . . . , 134x) and comprising at least one processing unit 136a3, . . . , 136x3, the second network (140) comprising;
- first and second sets (146, 148) of second nodes (140a, 140b, . . . , 140u), each second node (140a, 140b, . . . , 140u) being configurable to have an output (134a, 134b, . . . , 134x) of one or more first nodes (130a, 130b, . . . , 130x) as input(s) (142a, 142b, . . . , 142u) and configured to produce an output (144a, 144b, . . . , 144u);
- and
- wherein the output (144a) of a second node (140a) of the first set (146) of nodes (140a) is utilizable as an input to one or more processing units (136a3, 136b1), each processing unit (136a3, 136b1) being configured to provide negative feedback to a respective first node (130a, 130b), and/or wherein the output (144u) of a second node (140u) of the second set (148) of nodes (140b, . . . , 140u) is utilizable as an input to one or more processing units (136x3), each processing unit being configured to provide positive feedback to a respective first node (130x).