Ingrid Gerdes

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BACKGROUND More than 170 weak or partial RHD alleles are currently known. A similar heterogeneity of RHCE alleles may be anticipated, but a large-scale systematic analysis of the molecular bases of altered C, c, E, and e antigenicity in European blood donors was lacking. STUDY DESIGN AND METHODS Between November 2004 and October 2006, samples collected(More)
Today no detailed ground trajectories exist; although trajectory based ground operations would improve the runway sequence optimization by more accurate taxi times. The aim of this study was to extend the time-based trajectory management to the ground and link it with departure management. A specific futuristic mean to achieve time-based trajectories on(More)
With the rising problems in mind a new idea evolved in the near past: Free−flight for en−route traffic. This would allow to use the whole airspace and therefore to increase the capacity of the airspace system. It would not be necessary any longer to force the use of the prescribed routing system and to leave the space between the routes unused. The main(More)
This paper reports first results from a workshop to assess the feasibility of a new method of tool-supported timebased surface management. Using high-fidelity human-in-theloop simulations, ground controllers had to manage traffic in adherence to time-based surface trajectories while being supported by a surface management system prototype and a departure(More)
The German Aerospace Center (DLR) and the National Aeronautics and Space Administration (NASA) have been independently developing and testing their own concepts and tools for airport surface traffic management. Although these concepts and tools have been tested individually for European and US airports, they have never been compared or analyzed(More)
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