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.
Itâs common to encounter this kind of turbulence while flying over the Rocky Mountains, the Sierra Nevada or Wasatch mountain range. Mountain wave turbulence is also common over Greenland, often encountered en route from Europe to the United States.