Use of an atmospheric plasma for the surface treatment of inorganic particles selected from the group consisting of particles of metal oxides, particles of metal carbonates, particles of metal sulfates, particles of metal phosphates, acicular particles, platy particles and fibrous particles,with a fluorine-containing precursor. The crash barrier girder extends along the ground a distance above it. Audio content may be selected based on sleep states, such as sleep preparation, being asleep or sleeping, wakefulness, and the like. The rigid member engages the deflection end of the cantilever spring, and constrains the deflection end to a predetermined path of deflection as the cantilever spring and the rigid member move with respect to one another. Alternatively, when the rocker arm shaft is positioned at a height above the lower position, an upper surface of the rocker arm becomes engageable to varying degrees with the fixed fulcrum point, allowing the rocker arm to pivot around the fixed fulcrum point, thereby reducing the rocker arm ratio, and corresponding valve lift dependent on the rocker arm shaft position.