Hitachi Dublin Lab,, Hitachi Europe Ltd., OReilly Institute, Trinity College, Dublin 2, Ireland. enda.kelly@hitachi-eu.com|Hitachi Dublin Lab,, Hitachi Europe Ltd., OReilly Institute, Trinity College, Dublin 2, Ireland. enda.kelly@hitachi-eu.com|Hitachi Dublin Lab,, Hitachi Europe Ltd., OReilly Institute, Trinity College, Dublin 2, Ireland. enda.kelly@hitachi-eu.com