In order to study the interacting quantum gases of lithium atoms, we have developed a novel dipole trap based on the resonant enhancement of a far detuned standing wave in an optical resonator. Light from an ultrastable 2-W Nd:YAG laser is coupled into the resonator and enhanced 130-fold, thus creating a trap depth of ~1 mK for the lithium atoms. It enables us to trap ~10-10 laser-cooled atoms ...

The middle-latitude standing wave problem is investigated by means of a quasi-geostrophic, linear, steadJ;-state model in which the zonal current is perturbed by the lower boundary topography and by a distribution of heat sources and sinks. All the perturbations are assumed to have a single meridional wavelength and the dissipation is considered to take place in the surface boundary layer using...

We present the results of an experiment that (a) shows the usefulness of screening out drop-outs and (b) tests whether different methods of payment and reminder intervals affect charitable giving. Following a lab session, participants could make online donations to charity for a total duration of three months. Our procedure justifying the exclusion of drop-outs consists in requiring participant...