1. International Collaboration for Turbulence Research and Dipartimento Fisica and INFN, Università di “Tor Vergata,” Via della Ricerca Scientifica 1, 00133 Roma, Italy
2. International Collaboration for Turbulence Research, Max Planck Institute for Dynamics and Self-Organization, Am Fassberg 17, D-37077 Goettingen, Germany and Laboratory of Atomic and Solid-State Physics, Cornell University, Ithaca, New York 14853, USA
3. International Collaboration for Turbulence Research, INFM-CNR, SMC Dipartimento di Fisica, Università di Roma “La Sapienza,” p.zle A. Moro 2, 00185 Roma, Italy and Istituto dei Sistemi Complessi-CNR, via dei Taurini 19, 00185 Roma, Italy
4. International Collaboration for Turbulence Research, CNR-ISAC, Sezione di Roma, Via Fosso del Cavaliere 100, 00133 Roma, Italy and INFN, Sezione di Lecce, 73100 Lecce, Italy
5. International Collaboration for Turbulence Research and Max Planck Institute for Dynamics and Self-Organization, Am Fassberg 17, D-37077 Goettingen, Germany
6. International Collaboration for Turbulence Research and Istituto per le Applicazioni del Calcolo CNR, Viale del Policlinico 137, 00161 Roma, Italy and INFN, Sezione di Ferrara, Via G. Saragat 1, I-44100 Ferrara, Italy