GRAIL, an omni-directional gravitational wave detector
  A cryogenic spherical and omni-directional resonant-mass detector proposed by the GRAIL collaboration is described. 
D. v. Albada, W. v. Amersfoort, H. Boer Rookhuizen, J. Flokstra, G.   Frossati, H. v.d. Graaf, A. Heijboer, G. Heijboer, E. ...