Risk-Adaptable Access Control (RAdAC) This paper considers the impediments of traditional access control approaches to sharing of. information. It describes a concept for an access control model that emulates real world decision-. making, considering operational need and security risk as part of each access control decision, and.
Turbulence can occur in the lowest part of the troposphere during the daytime when heating of the sun causes convective mixing of the air. Once the airplane rises above this turbulent boundary layer, the air becomes smoother. But other processes can also cause these up- and down-drafts.
The vortex produced by the left wing rotates in a clockwise direction when seen from behind. The one from the right rotates counterclockwise. Larger airplanes produce stronger vortices because the wings produce more lift to support the weight of the airplane. The vortices settle behind the aircraft to an altitude about 1,000 below the aircraft's flight path, where they tend to remain.