The flhF gene of Pseudomonas putida, which encodes a GTP-binding protein, is part of the flagellar-motility-chemotaxis operon. Its disruption leads to a random flagellar arrangement in the mutant (MK107) and loss of directional motility in contrast to the wild type, which has polar flagella. The return of a normal flhF allele restores polar flagella and normal motility to MK107; its overexpress...

We report on an analysis of the drifting subpulses of PSR B0320+39 that indicates a sudden step of ∼ 180 degrees in subpulse phase near the centre of the pulse profile. The phase step, in combination with the attenuation of the periodic subpulse modulation at pulse longitudes near the step, suggests that the patterns arise from the addition of two superposed components of nearly opposite drift ...

We propose and analyze a technique that allows one to suppress inelastic collisions and simultaneously enhance elastic interactions between cold polar molecules. The main idea is to cancel the leading dipole-dipole interaction with a suitable combination of static electric and microwave fields in such a way that the remaining van der Waals-type potential forms a three-dimensional repulsive shie...

The multiphonon emission capture mechanism by neutral centers, in the presence of an electric field below 1 MV/cm, has been numerically simulated by the Monte Carlo method. Based on common models for the initial and final states, a simple expression of the process probability has been calculated considering both nonpolar and polar electron-phonon coupling. The validity range of this expression ...

As part of the NASA International Polar Year activities, a Ka-band cross-track interferometric synthetic aperture radar recently demonstrated high precision elevation swath mapping capability. This proof-ofconcept instrument was achieved by interfacing antennae and Ka-band electronics with the Jet Propulsion Laboratory’s L-band UAVSAR. Deployed on the NASA Gulfstream III, initial successful eng...

This paper describes part of Rockwell’s contribution to Phase I of ARPA’s Planning Initiative (ARPI). Specifically, we describe the representation language and a set of algorithms that constitute the corc of a Plan Simulation and Analysis tool (PSA). The main objective of the PSA is to provide capabilities for the testing and evaluation of sequences of actions in domains characterized by unavoi...