Slub Effect means a yarn with thick and thin sections alternating regularly or irregularly. Alex McLean of Slub and Nick Collins are the inventors of the Algorave. It is currently housed at the Saxon State and University Library Dresden (SLUB) (Mscr. Two special collection areas of the Deutsche Forschungsgemeinschaft have been established at the SLUB. On August 1, 2002, the SLUB opened for the readers. The SLUB completes the acquisition of foreign and domestic literature with own resources. Besides the central library at Zellescher Weg, the SLUB encompasses five further sites.