@TechReport{	  it:2011-015,
  author	= {Elena Sundkvist and Kurt Otto},
  title		= {Discretization of a Hybrid Model for Acoustic Wave
		  Propagation in Layered Fluid Media},
  institution	= {Department of Information Technology, Uppsala University},
  department	= {Division of Scientific Computing},
  year		= {2011},
  number	= {2011-015},
  month		= jun,
  abstract	= {The objective is to construct and discretize (to
		  fourth-order accuracy) a hybrid model for waveguide
		  problems, where a finite difference method for
		  inhomogeneous layers is coupled to a boundary element
		  method (BEM) for a set of homogeneous layers. Such a hybrid
		  model is adequate for underwater acoustics in complicated
		  environments. Waveguides with either plane or axial
		  symmetry are treated, which leads to (algebraically)
		  two-dimensional problems. The main focus is on the
		  collocated BEM.},
  note		= {Updated 2011-08-08.}
}