A shielded head cover in accordance with an embodiment of the present application includes at least one attenuation portion including a radiation attenuating material configured and operable to protect a user head from radiation. In one embodiment the method for manufacturing a passivation layer includes depositing a first silicon based dielectric layer on a workpiece, the first silicon based dielectric layer comprising nitrogen, and depositing in-situ a second silicon based dielectric layer on the first silicon based dielectric layer, the second dielectric layer comprising oxygen. In another embodiment, the TiN complex can include a plurality of TiN layers stacking together. The lever is arranged in such a manner as to be rotatable relative to the stopper around a rotation axis such that the second contact surface presses the second surface when the displacement portion rotates relative to the stopper around the rotation axis. A rollover event may be averted by extending the primary and secondary hydraulic cylinders such that the stabilizing wheel makes contact with a road without substantially leaving a lane, and using the secondary hydraulic cylinder to push against the road until the rollover event has been averted. In this way, an active association is provided, allowing cross-analysis of the resource objects participating in the association.