2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/44197A few comments are made on the role of nonperturbative and perturbative power corrections. This is followed by a description of energy flow observables and correlations that may provide a flexible approach to rapidity distributions in hadronic scattering.7 LaTeX pages. Based on a talk presented at the 44th INFN Workshop, "QCD at Cosmic Energies", Aug.29 - Sept.5, 2004, Erice, ItalyHigh Energy Physics - Phenomenologytext