Azimuthal anisotropy is studied by taking into account the ridges created by semi-hard scattering, which is sensitive to the initial spatial configuration in non-central heavy-ion collisions, without requiring rapid thermalization Phenomenological properties of the bulk and ridge behaviors are used as inputs to determine the elliptic flow of pion and proton at low pT. At intermediate pT the recombination of shower partons with thermal ones becomes more important. The φdependence of shower partons arises from the variation of the in-medium path length of the hard parton that generates the s...
