Dynamical Localization: Hydrogen Atoms in Magnetic and Microwave fields

We show that dynamical localization for excited hydrogen atoms in magnetic and microwave fields takes place at quite low microwave frequency much lower than the Kepler frequency. The estimates of localization length are given for different parameter regimes, showing that the quantum delocalization border drops significantly as compared to the case of zero magnetic field. This opens up broad possibilities for laboratory investigations.Comment: revtex, 11 pages, 3 figures, to appear in Phys. Rev. A, Feb (1997

The Future for Civilian UAV Operations

The future looks bright for unmanned aerial vehicles (UAVs). Their ability to carry sophisticated imaging equipment attached to lightweight vehicles, to hover in position despite incremental weather conditions, to fly simple missions, and takeoff and land automatically, combined with their comparatively (compared to manned aircraft) lower investment and operational costs has driven a paradigm shift in the history of air transport. This chapter is organized around six themes that underscore the current discourse regarding the future of UAVs in civilian commercial operations, as well as highlighting the discussions of the previous chapters regarding policy and certification, technology, training, social and economic forces, air cargo, and the effect of UAVs on other sectors of the air transport industry