Disclosed are glass materials generally belonging to the P2O5\u2014ZnO\u2014TeO2 system and process for making the same. Because the breakdown layer forms a breakdown filament along its length, the relative area between layers may be reduced, reducing the threshold current of the select device relative to that of the memory element. Corresponding to the subtractors, path searchers are connected to successive taps of the subtractors for respectively detecting the delay profiles produced by the correlator. The skin and flesh layers proximate the knee-joint are retracted utilizing a retractor that is attached to the retractor support which is mounted to a surgical table. The stem overlies a polysilicon plug formed on the substrate. The present invention is further directed to pharmaceutical compositions comprising the compounds of the present invention and to methods for treating conditions such as cancers and other cell proliferative disorders.