This paper presents the results of a study to quantify the performance of Weather Avoidance Fields in predicting the operational impact of convective weather on en route airspace. The Convective Weather Avoidance Model identifies regions of convective weather that pilots are likely to avoid based upon an examination of the planned and actual flight trajectories in regions of weather impact. Fro...

Computer-based decision support systems are increasingly used to aid human decision makers in dynamic, uncertain, time-stressed and high-stakes contexts. The decision of whether, and if so, when to evacuate New Orleans as Hurricane Katrina approached landfall is a prime example. An evaluation of the “HURREVAC” decision support system (DSS) used during Katrina is presented. The evaluation is bas...

Situated learning theory has emerged as a radical alternative to conventional cognitivist theories of knowledge and learning, emphasising the relational and structural aspects of learning as well as the dynamics of identity construction. However, although many researchers have embraced the theoretical strengths of this perspective, methodological and operational issues remain undeveloped in the...

The use of nuclear power plants to produce electric energy is a safety-critical process where ultimate operational decisions still relies with the control room operators. Thus it is important to provide the best possible decision support through effective supervisory control interfaces. A human centered design approach, based on cognitive task analysis methods, was used to observe the operators...

To show whether direct proteolysis of coagulation factors may play a role in patients with so-called consumption coagulopathy, granulocytic neutral proteases in the plasma of patients with acute myelocytic leukemia and septicemia were assayed by one- and two-dimensional Laurell electrophoresis. Complexes between serum alpha1-antitrypsin and elastase-like granulocytic protease could be demonstra...