  More than 15000 red giants observed by Kepler for a duration of almost one
year became public at the beginning of this year. We analysed a subsample of
416 stars to determine the global properties of acoustic modes (mean large
separation and frequency of maximum power). Using the effective temperature
from the Kepler Input Catalog, we derived a first estimation of the masses and
radii of these stars. Finally, we applied wavelets to look for signature of
surface rotation, which relies on the presence of spots or other surface
features crossing the stellar visible disk.
