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.
For anyone who doesn't understand what's going on, turbulence can prompt fears that the airplane will go out of control or be damaged. As with most fears, knowledge is the antidote. Turbulence isn't going to bring down your plane. Only extreme turbulence is likely to damage an aircraft.Fortunately, extreme turbulence is rare and pilots with a basic knowledge of what causes turbulence can avoid it.y Jack Williams, USATODAY.com. Anyone who's made more than a few flights has almost surely had at least one b umpy ride when the airplane felt like a car on a rough road, except that the airplane might have rolled from side to side as well as bouncing up and down. That's turbulence..