The recent spectroscopy of water vapour in the ground electronic state is reviewed. Experimental advances from the microwave to the near ultraviolet spectral regions are surveyed. On the theoretical front, new approaches to the calculation of vibration–rotation energy levels are covered. Water spectroscopy finds extensive application in astronomy, atmospheric science and combustion research. An...

Recent lattice results for the energy of gluonic excitations as a function of quark separation are shown to correspond to transverse relativistic flux tube vibration modes. For large quark separations all states appear to degenerate into a few categories which are predicted uniquely, given the ground state.

This paper designs a fuzzy logic controller to suppress the vibrations of a large space antenna-like ground experimental structure located at the JPL/AFPL Large Spacecraft Control Laboratory. This fuzzy logic controller provides a simple, yet robust, means to the vibration control of a highly uncertain structural system.