Note after publication:
The October 2012 issue of physica status solidi (b) was dedicated to the 90th birthday of Stanford Robert Ovshinsky. After the publication of the online version of the special issue, sad news came: on 17 October 2012, Stan Ovshinsky passed away, a month short of his 90th anniversary. - Read the Obituary in the November issue [Phys. Status Solidi B 249(11), 2055–2056 (2012)].