Luciano Rezzolla
SISSA, International School for Advanced Studies and INFN, Trieste,
Italy
Department of Physics and Astronomy, Louisiana State
University, Baton Rouge, LA 70803 USA
Lectures given at the:
3rd VIRGO-EGO-SIGRAV School on Gravitational Waves
May 24th - 28th , 2004 Cascina (PI), Italy