140 Irène Abi-Zeid, Université Laval Nabil ABSI, LIP6/DynaSys sunday adesonya, sunex Babatope Adeusi, NDOW'S Junior and Senior Secondary School Annes P.O.BOX 3145 SEREKUNDA THE GAMBIA Hakim Akeb, LaRIA, Université de Picardie Jules Verne, Amiens amar Alili, university of boumerdes Claudio Alves, Universidade do Minho Edoardo Amaldi, Politecnico di Milano Felipe Baesler, Universidad del BioBio Jean-Pierre Barthelemy, ENST-Bretagne Tarik Belgacem, université PARIS 1 Walid Ben-Ameur, INT Cédric Bentz, CEDRIC - CNAM Raymond BISDORFF, University of Luxembourg Paulo Boaventura-Netto, COPPE/UFRJ Xavier BONNAIRE, Universidad Santa Maria Sandro Bosio, DEI, Politecnico di Milano Timothee Bossart, LIP6 Djalil Boudjehem, LAIG Noureddine Bouhmala, Vestfold University College Mustapha Bouhtou, France Telecom R&D Abdelhak Bouzit, ENAFOR/ALGERIA Bernd Brandl, University of Vienna Daniel J. Brito Q., Universidad de Oriente, Nùcleo de Sucre Escuela de Ciencias, Departamento de Matemàticas Julien Briton, DynaSys François BRUCKER, ENST Bretagne Maria Emilia Camargo, Universidade de Caxias do Sul Manoel Campelo, Federal University of Ceará Alfredo Candia, U. of Talca cyril canon, Laboratoire d\'Informatique Laurence Carme, France Telecom R&D Manuel V. Centeno R., Universidad de Oriente, Núcleo de Sucre, Escuela de Ciencias Dpto. de Matemáticas Manuel Cepeda, Universidad Catolica de la Santisima Concepcion Irène Charon, ENST Ricardo Corrêa, Universidade Federal do Ceará Marie-Christine Costa, CEDRIC-CNAM Sylvain Coulonges, LaBRI Daniel Delahaye, Labo Math Appli CENA Marc Demange, ESSEC Lucile Denoeud, ENST, université PARIS 1 Nicolas Derhy, CEDRIC-CNAM Boris Detienne, Institut de Mathématiques Appliquées (Angers) Ajiri Mathias Ebulu, Computech Services Limited TINAZ EKIM, EPFL-ROSE Nathalie FAURE, France Telecom R&D Dominique Feillet, Laboratoire d'Informatique d'Avignon, Université d'Avignon Diego Olivier Fernandez Pons, Université Paris VI, ILOG S.A. Rosa Figueiredo, UERJ Karan Fouladi, LIP6 Xavier Gandibleux, LINA - University of Nantes M. Teresa Godinho, ESTIG - IPBeja José Gordillo, University of Seville Eric GOURDIN, France Telecom R&D david gravot, Rostudel Mack Gregory, palink limited Alain Guénoche, IML Jinil Han , KAIST. Hovhannes Harutyunyan, Concordia University, Montreal Olivier Hudry, ENST A. Idrissi, LaRIA Florian Jaehn, Institute of Information Systems, University Siegen Bangaly Kaba, LIMOS-Université Blaise Pascal Sampath Kameshwaran,INRIA Lorraine Vladimir R. Khachaturov, Computer Center of Russian Academy of Sciences OLIVIER KLOPFENSTEIN, FRANCE TELECOM R&D Ludmilla Koshlai, Institute of Cybernetics Arie Koster, Zuse Institute Berlin Tero Laihonen, University of Turku Mercedes Landete, University Miguel Hernandez of Elche chungmok Lee, KAIST Valeria Leggieri, University of Lecce Aurélie Le Maître, France Télécom R&D / CNAM Axel Le Poupon, ENST Benjamin Leveque, Leibniz-IMAG-Grenoble Leo Liberti, DEI, Politecnico di Milano olivier liess, Laboratoire d\'Informatique d\'Avignon, Université d\'Avignon Andrea Linhares, LIA - UNIVERSITE D'AVIGNON Antoine Lobstein, ENST Reinder Lok, Universiteit Maastricht Arne Løkketangen, Moplde University College Hakim Mabed, SeT - Université de Belfort-Montbéliard Alfredo Marín, Universidad de Murcia Simone Martins, UFF Fernando J. Marval L., Universidad de Oriente, ´`ucleo de Sucre, Escuela de Ciencias, Departamento de Matemàticas Isabel Mendez-Diaz, Universidad de Buenos Aires Philippe Michelon, Universidade Estadual do Ceara Mikhail Mikhalevich, Ukrainian Academy of Foreign Trade Ethel Mokotoff, Universidad de Alcalá Jérôme Monnot, Lamsade Graciela Nasini, Universidad Nacional de Rosario jose Neto, institut national des telecommunications Romily Ngakosso Okandza, Iktec Alain Nguyen, RENAULT Juan Carlos Ochoa , Universidad de Alcalá Cristian Oliva, Universidad de Concepción Ifeanyi Onwaeze, aniocha north local goverment Marcus Oswald, Institute of Computer Science, University of Heidelberg Cheikh brahim Ould El Mounir, LaRIA (UPJV) Sofiane Oussedik, ILOG Marta Pascoal, Department of Mathematics - CIS, Faculty of Sciences, University of Coimbra Christian Roed Pedersen, University of Aarhus Jan Pelikan, University of Economics Prague Agnes Plateau, CEDRIC-CNAM Gérard Plateau, Université Paris 13 Marie-Christine Plateau, CNAM - CEDRIC Anthony Przybylski, LINA - Universite de Nantes Daniele Pretolani, DISMI - Universita' di Modena e Reggio Emilia Dominique Quadri, LAMSADE, Université Paris-Dauphine Celso Ribeiro, Universidade Federal Fluminense Roger Rios, Universidad Autónoma de Nuevo León Yasmin Rios, LIP6 Olivier Rioul, ENST Dolores Romero Morales, University of Oxford Suzana Russo, URI Toufik SAADI, CERMCEM,MSE,Université Paris 1 Panthéon-Sorbonne Mohammad S. Sabbagh, Isfahan University of Tech Christine Sinoquet, LINA - Laboratoire d\'Informatique de Nantes-Atlantique Edwin Soedarmadji, California Institute of Technology Francis Sourd, LIP6 - CNRS Eric Soutif, CNAM-CEDRIC Carlos SOZA, Universidad Santa Maria Richard Steinberg, University of Cambridge Jayme Szwarcfiter, Federal University of Rio de Janeiro João Telhada, CIO / DEIO - FCUL Pierre Tolla, Unversite Paris Dauphine Sophie Toulouse, LIPN - Universite Paris 13 James Mbungyuh Tseyah, CENTRE FOR RESEARCH INSTITUTE Alexis Tsioukias, Lamsade (Paris-Dauphine) Sunday Uka Anya , uni ilorin Sacha Varone, École Polytechnique Montréal Michel Vasquez, LGI2P EMA-EERIE andrea vietri, Universita\' La Sapienza Annegret Wagler, Uni Magdeburg, IMO Horacio Yanasse, INPE Boting Yang, University of Regina Velásquez Yurayh, Universidad Metropolitana Paula Zabala, Universidad de Buenos Aires IBRAHIM MAMANE SOULEY, LIP6 harichane moustafa, 23