Physica A: Statistical Mechanics and its Applications

Editors: K.A. Dawson Dept. of Chemistry, University College Dublin, Belfield, 4 Dublin, Ireland, J.O. Indekeu Afdeling Theoretische Fysica, Katholieke Universiteit Leuven, Celestijnenlaan 200 D, 3001 Heverlee, Belgium, Fax: +32 16 327983, H.E. Stanley Center. for Polymer Studies, Boston University, 590 Commonwealth Avenue, Room 204B, Boston, MA 02215, USA, Fax: +1 617 353 3783, Constantino Tsallis Fisicas/CNPq, Centro Brasileiro de Pesquisas, Rua Xavier Sigaud 150-Urca, 22290 Rio de Janeiro, Brazil, Fax: +55 21 5412047, Advisory Editorial Board: S. Abe Dept. of Physical Engineering, Mie University, Tsu, 514-8507 Mie, Japan, P. Alstrom Niels Bohr Inst., University of Copenhagen, Blegdamsvej 17, 2100 København Ø, Denmark, M.C. Barbosa Inst. de Fisica, Universidade Federal do Rio Grande do Sul, Caixa Postal 15051, 91501-970 Porto Alegre, Brazil, C. Beck School of Mathematical Sciences, Queen Mary, University of London (QMUL), 327 Mile End Road, London, E1 4NS, UK, D. Bedeaux Dept. of Chemistry, Norwegian University of Science & Technology (NTNU), NO-7491 Trondheim, Norway, A.N. Berker Sabanci University, Orhanli-Tuzla, 34956 Istanbul, Turkey, K. Binder Inst. für Physik, Condensed Matter Group, Johannes-Gutenberg-Universität Mainz, Staudingerweg 7, 55128 Mainz, Germany, L. Blum Dept. of Physics, Universidad de Puerto Rico, PR 0093 Rio Piedras, Puerto Rico, B. Boghosian Dept. of Mathematics, Tufts University, 503 Boston Avenue, Medford, MA 02155, USA, A. Bunde Inst. für Theoretische Physik, Justus-Liebig-Universität Gießen, Heinrich-Buff-Ring 16, 35392 Giessen, Germany, A. Carbone Dipart. di Fisica, Politecnico di Torino, Corso Duca degli Abruzzi 24, 10129 Torino, Italy, A. Coniglio Dipart. di Scienze Fisiche, Università di Napoli "Federico II", Complesso di Monte S. Angelo, Via Cinthia, I-80126 Napoli, Italy, L. de Arcangelis Dept. of Information Engineering and CNISM, Seconda Università degli Studi di Napoli, 81031 Aversa (CE), Italy, P.M.C. de Oliveira Inst. de Fisica, Universidade Federal Fluminense (UFF), Avda. Litoranea s/n, 24210-340 Icarai, Niteroi-RJ, Brazil, P. Debenedetti Dept. of Chemical Engineering, Princeton University, Olden Street, Princeton, NJ 08544-5263, USA, S. Edwards Cavendish Lab., University of Cambridge, Madingley Road, Cambridge, CB3 0EE, UK, F. Family Dept. of Physics, Mathematics and Science Center, Emory University, 400 Dowman Drive, Atlanta, GA 30322, USA, M.E. Fisher Dept. of Mathematics & CSCAMM, University of Maryland, College Park, MD 20742, USA, S.C. Glotzer University of Michigan, 2300 Hayward St., Ann Arbor, MI 48109-2136, USA, A.Y. Grosberg Dept. of Physics and Astronomy, University of Minnesota at Twin Cities, Room 309, 116 Church Street SE, Minneapolis, MN 5545, USA, P. Hanggi Inst. für Physik, Universität Augsburg, Universitätsstrasse 1, D-86135 Augsburg, Germany, S. Havlin Dept. of Physics, Bar-llan University, 52900 Ramat-Gan, Israel, H.J. Herrmann HIF E12, Eidgenössische Technische Hochschule (ETH) Zürich, 8093 Zurich, Switzerland, H.J. Hilhorst Lab. de Physique Theorique, Université Paris-Sud (Paris XI), Bâ Timent 210 15 rue Georges Clemenceau, 91405 Orsay, France, C.-K. Hu Inst. of Physics, Academia Sinica, 128 Sec. 2 Academia Rd., 11529 Taipei City, Taiwan, ROC, M.H. Jensen Niels Bohr Institute, Blegdamsvej 17, 2100 København, Denmark, K. Kawasaki 37-9 Takamidai Higashi-Ku, 811-0215 Fukuoka, Japan, J. Kertesz Inst. of Physics, Technical University of Budapest, Budafoki utca 8, 1111 XI. Kerület, Budapest, Hungary, K. Kitahara Div. of Natural Science, International Christian University, 10-2, Osawa 3-chome, 181-8585 Mitaka-shi, Tokyo, Japan, K. Koga Dept. of Chemistry, Fac. of Science, Okayama University, Tsushima-Naka 3-1-1, 700-8530 Okayama, Japan, H.N.W. Lekkerkerker Van 't Hoff Lab. for Physical and Colloid Chemistry, Universiteit Utrecht, Postbus 80051, 3508 TB Utrecht, Netherlands, M.L. Lyra Dept. de Quimica, Universidade Federal de Alagoas, Tabuleiro do Martins, 57072-970 Maceio-L, Brazil, F. Mallamace Dipart. di Fisica, Università degli Studi di Messina, Vill. S. Agata C.P. 55, 98166 Messina, Italy, S. Milosevic Fac. of Physics, University of Belgrade, Studentski trg 12, PO Box 368, 11001 Belgrade, Serbia, A. Pekalski Inst. of Theoretical Physics, University of Wroclaw, Pl. M. Borna 9, 50-204 Wroclaw, Poland, L. Pietronero Dipto. di Fisica, Università di Roma "La Sapienza", Piazzale Aldo Moro 2, 00185 Roma, Italy, A. Plastino Depto. de Fisica, Universidad Nacional de La