Yang-Yang thermodynamics on an atom chip.

We investigate the behavior of a weakly interacting nearly one-dimensional trapped Bose gas at finite temperature. We perform in situ measurements of spatial density profiles and show that they are very well described by a model based on exact solutions obtained using the Yang-Yang thermodynamic formalism, in a regime where other, approximate theoretical approaches fail. We use Bose-gas focusing [I. Shvarchuck, Phys. Rev. Lett. 89, 270404 (2002)] to probe the axial momentum distribution of the gas and find good agreement with the in situ results.

[Quality assurance in roentgen diagnosis. 1996 results and problems from the viewpoint of the Medical Section in accordance with ordinance 16 of the roentgen regulation of the Saxony Regional Medical Group]. / Qualitätssicherung in der Röntgendiagnostik. Ergebnisse und Probleme 1996 aus der Sicht der Arztlichen Stelle gemäss section 16 Röntgenverordnung der Sächsischen Landesärztekammer.

The "Arztliche Stelle gemäss RöV" was established in Saxony in 1992. Structure and results of quality assurance in radiological diagnostics are described briefly. Quality checks delivered acceptable results for the majority of X-ray devices. Typical errors are shown and explained by using some X-ray pictures.