The invention provides for a spinal fixation support device to be used in conjunction with spinal fixation instrumentation. The air vent cover system comprises a housing with an opening. The average refractive index of the SWS varies from the refractive index of air to the refractive index of the base, from a tip of each of the convex portions to the base. The distance between neighboring contact structures is smaller than 100 nm. Set priority level for each conflicting services, so as to avoid the service conflict, such as the conflict between the originating and terminating call and the location update, and the conflict between the location update of main card and subordinate card. More particularly, various embodiments of the present invention are directed towards sorbent fiber compositions for temperature swing adsorption processes.