The present status of the (JR) dynamical parton distribution functions is
reported. Different theoretical improvements, including the determination of
the strange sea input distribution, the treatment of correlated errors and the
inclusion of alternative data sets, are discussed. Highlights in the ongoing
developments as well as (very) preliminary results in the determination of the
strong coupling constant are presented.Comment: 4 pages, 1 figure, Talk given at the XX International Workshop on
Deep-Inelastic Scattering and Related Subjects (DIS2012
