The electroabsorption modulator comprises a p-i-n junction structure that includes an active layer, a p-type cladding layer and an n-type cladding layer with the active layer sandwiched between the cladding layers. A damper has a circular pressing section and is magnetically drawn toward the turntable so as to hold the disk-shaped medium. In addition, the PE network element establishes a dynamic spoke pseudowire for each virtual instance affected with the MTU to restore HVPLS hub connectivity for that PE network element. In yet another aspect, a process is provided for producing hydrogen from an undiluted light hydrocarbon reactant, comprising contacting the hydrocarbon reactant with a catalyst as described above in a reactor, and recovering a substantially carbon monoxide-free hydrogen product stream. This invention is also directed to pharmaceutical compositions including and methods using such compounds. The computing device analyzes data output by the sensors and representative of the sensed localized conditions to assess the down-hole drilling conditions.