This paper proposes an enhanced Weibull-Corrosion Covariate model for reliability assessment of a system facing operational stresses.
Aircraft structures require minimum weight configurations with high strength in order to support all operational stresses with high reliability.
Traditional warm standby models aim to reduce the operational cost and failure rate of the standby elements by keeping them partially powered and partially exposed to operational stresses.
Fatigue caused by alternating operational stresses in terms of temperature or pressure change is an important damage mechanism in continued operation of nuclear power plants.
The developed method is based on distance measurement and it is capable to determine both the residual and operational stresses of large steel structures.
In contrast to nearly half of drone operators' reporting "high operational stress," 36 percent of a control group of 600 Air Force members in logistics or support jobs reported stress.
It did not specifically define high operational stress but said operators were judged to have it if they rated their stress levels as 8 or above on a scale of 0 to 10, with 10 representing the most stress.
Furthermore, if the VT of any pixel increases owing to the operational stress experienced during the continued operation of the display, this directly results in a gradual reduction of the light output from the stressed pixel for a given programmed gate voltage.
In a survey of nearly 1,500 Air Force members, including 840 operators of Predator, Reaper and Global Hawk drones, the Air Force found that 46 percent of Reaper and Predator pilots and 48 percent of Global Hawk sensor operators reported what the Air Force termed "high operational stress".
Symptoms of combat stress or, in noncombat situations like today's, "operational stress," include anxiety and irritability, agitation and apathy and, in more severe cases, memory loss and psychotic episodes.
"We emphasize that this does not only apply to people being shot at," said Col. James Stokes, a psychiatrist who runs the group, called Combat and Operational Stress Control units.
