The multiple scatterings incurred by a hard quark produced in a nuclear
medium induce the emission of soft gluons which carry a fraction of the quark
energy and eventually affect the hadronization process. Here, the depletion of
semi-inclusive hadron spectra in DIS on various nuclei (N, Ne, Cu, Kr) is
computed as a function of nu and z to leading order in alpha_s through
medium-modified fragmentation functions. Using the transport coefficient q
previously determined from Drell-Yan production, the predictions are found to
be in good agreement with EMC and HERMES preliminary data. Calculations on Xe
targets are also presented and discussed.Comment: 20 pages, 8 figure
