A passivated germanium surface that is a germanium carbide material formed on and in contact with the termanium material. The chassis number marking section is provided on a cowl assembly and disposed above a damper base to which an end of the cowl box is secured. The generator circuit receives an input signal and a carrier signal at a carrier frequency and generates a plurality of versions of a drive signal associated with different delays. The methods can include isolating neural stem cells secreting growth factors affecting the growth andor regeneration of specific types of neuron. The method including fabricating a device on a silicon-on-insulator substrate with first contacts to the devices and wiring levels on a first side to the first contacts, removing a lower silicon layer to expose the buried oxide layer, forming second contacts to the devices through the buried oxide layer and forming wiring levels over the buried oxide layer to the second contacts.