Symposium on Trends in Applications of Mathematics to Mechanics (STAMM 94). Lisbon (July 94)

  Structure and Dynamics of nonlinear waves in fluids. IUTAM Symposium.Hannover (Aug. 94).

  Problèmes mathématiques dans la théorie des ondes hydrodynamiques. Colloque du CIRM - Luminy (May 1995)

  4th International conference on Navier-Stokes equations and related nonlinear problems. Toulon (May 1995)

  3rd International Congress on Industrial and Applied Mathematics. ICIAM Hamburg (July 1995)- chairman for a minisymposium

  9th International Couette - Taylor Workshop. Boulder, Colorado (Aug. 1995)

  Oberwolfach. Dynamical systems Methods in Fluid Dynamics. (July 1996)

  Athenes. 2nd World Congress of Nonlinear Analysis. (July 1996)

  Vancouver. Internat. Workshop on Theor. and Num. Fluid Dynamics (July-Aug. 1996)

  XIX th International Congress of Theoretical and Applied Mechanics, Kyoto (Aug. 1996)

  Warwick. Workshop on time-reversal symmetry in dynamical systems. (Dec. 1996)

  Varenna. Internat. Conf. on Navier-Stokes equ. Theory and numerical methods. June 1997

  10th International Couette - Taylor Workshop. Paris, (July 1997)

  EUROMECH 376. Waves in two-phase flows. Istanbul (Turquie), April 98

  IUTAM Symposium on Three-dim aspects of problems in air/sea interaction. Nice (May 1998)

  Int. Congress of Mathematicians, Berlin (Aug. 98), invited speakerICM Berlin

  Congrès GAMM (German Applied Math and Mech), Metz, april 99, invited speaker

  Austral. Math. Soc. 43rd Annual Conf., Melbourne (Australia), July 99

  EQUADIFF 99, Berlin. Chairman of the Minisymposium "steady water waves", Aug 99

  EUROMECH 3rd Europ. Nonlinear Oscill. Conf. Lyngby (Danemark), Aug 99, invited speaker

  Symposium on Trends in Applications of Mathematics to Mechanics (STAMM 2000), Galway (Ireland). July 2000

  3nd World Congress of Nonlinear Analysis, Catania (Italy). (July 2000) (one hour speaker)

  XX th International Congress of Theoretical and Applied Mechanics, Chicago (Aug. 2000)

  Oberwolfach. Recent developments in the mathematical theory of water waves (Feb. 2001)

  Int. meeting "Contemporary Challenges in Applied Fluid Mechanics". Capo Miseno (June 2001)

  WASCOM 2001. Conf. on waves and stability in continuous media. Porto- Ercole (June 2001)

  1er Congrès Franco-Américain de Maths AMS-SMF. Lyon (July 2001)

  Spitafields day on Surface water waves. I.Newton Institute, Cambridge (Aug 2001)

  Conference on Nonlinear Analysis. Kloster Irsee, Germany (Jan 2002) (invited main speaker)

  Workshop on Dynamical systems methods in nonlinear wave equations (Juil 2002), Loughborough (GB)

  Dynamical system methods in fluid dynamics (Juil 2002), Oberwolfach, (All.)

  Int. Conf. Navier-Stokes equations and applications (NSEQ-8), Sept 2002, St Petersbourg (Russie)

  Symposium on Trends and Applications of Mathematics to Mechanics (STAMM2002), Oct 2002, Maiori (Italie)

  IMACS Nonlinear evolution equations and wave phenomena (April 2003) Athens, Georgia, USA

  Workshop on interfacial waves (May 2003) Loughborough (GB)

  WASCOM 2003. Conf. on waves and stability in continuous media (June 2003). Villassimius, Sardinia, Italy

  EQUADIFF 2003 (July 2003) Hasselt, Belgium

  EUROMECH Fluid Mech Conference (Aug. 2003) Toulouse, France

  Workshop "Géométrie, Systèmes dynamiques et Mécanique céleste", in honor of A.Chenciner, oct. 2003, Paris

  Workshop on bifurcation theory and spatio-temporal pattern formation (Dec. 2003) Fields Institute, Toronto, Canada

  Workshop Bifurcation theory and nonlinear waves. (juin 2004) Lausanne, Suisse

  Colloque Daniel Euvrard. Les méthodes mathématiques et numériques pour la physique et la mécanique. (Juillet 2004). Paris, France

  XXI th International Congress of Theoretical and Applied Mechanics, Warsaw (Aug. 2004) , Poland

  SIAM Nonlinear Waves and coherent structures, Orlando, Florida, USA (Oct 04)

  Congrès GAMM (German Applied Math and Mech), Luxembourg, March 2005

  IMACS Nonlinear evolution equations and wave phenomena (April 2005) Athens, Georgia, USA (cochairman of minisymposium)

  Waves 05, June 2005, Brown University, Providence (USA)(invited)

  2nd International Conference on Nonlinear Normal Modes and Localization in Vibrating Systems. Samos, Greece, June 2006 (invited)

  Symposium on Trends and Applications of Mathematics to Mechanics (STAMM2006), July 2006, Vienna (Austria) (invited)

  IUTAM Symposium on Hamiltonian Dynamics, Vortex Structures, Turbulence. Moscow, Russia, August 2006 (invited)

  SIAM Nonlinear Waves and coherent structures, Seattle, USA (Sept 2006) (cochairman of minisymposium)

  Oberwolfach (Germany). Mathematical theory of water waves. (Nov. 2006)

  Lausanne, Bernoulli center - EPFL, Perspectives en dynamique des fluides. (Dec. 2006)

  IMACS Nonlinear evolution equations and wave phenomena (April 2007) Athens, Georgia, USA (Scientific Committee)

  Dynamics Days (July 2007) Loughborough (GB) (Scientific Committee)

  ICIAM07 (International Congress on Industrial and Applied Mathematics, July 2007) Zurich, Switzerland, (cochairman of 2 minisymposia)

  Equadiff 2007 (International Conference on Differential equations, Wien, Austria (August 2007). Talks in 2 minisymposia

  Workshop on Recent advances in functional and Delay Differential equations (Nov. 2007) Halifax, Canada (plenary speaker)

  Workshop on Lattice models (July 2008) Bath, U.K. (plenary speaker)

  SIAM Nonlinear Waves and coherent structures,  Rome, Italy (July 2008).

  9ème Colloque Franco-Roumain de Mathématiques Appliquées. Brasov, Roumanie (Août-Sept. 2008) (invited conf.)

  Int. Conference "Differential Equations. Function Spaces. Approximation theory". Novosibirsk, Russia (Oct. 2008) (invited conf.)

 Workshop "Large amplitude internal waves". ICMS, Edinburgh, Scotland (Dec. 2008)

 CPNLW-09 Solitons in their Roaring Forties: Coherence and Persistence in monlinear waves. Nice, France (Jan2009)

 Rencontre du Non-linéaire. Paris, (March 2009) (plenary lecture)

 Variational and Topological Methods and Water waves, Bath, G.B. (May 2009)

 2nd Int. Congress of Serbian Soc. Mechanics. Palic, Subotica, Serbia (June 2009) (plenary lecture). 

Congrès Français de Mécanique CFM2009 Marseille (August 2009) (invited lecture)

International Conference on Asymptotics in dynamics, geometry and PDEs; generalized Borel summation. Pisa, Italy (Oct. 2009)

12th International Workshop on Instabilities and Nonequilibrium Structures. Viña del Mar, Chile (Dec 2009)

8th AIMS International Conference on Dynamical systems, Differential equations and Applications. Dresde, Germany (May 2010)

Mathematical challenges and modelling of hydroelasticity. ICMS Edinburgh, UK (June 2010)

Workshop "KAM and Cauchy theory for PDE". Ravello, Italy (May 2011)  

From Chaos to complexity (Les Houches 30th birthday). Warwick, UK (july 2011)

Equadiff 2011 (International Conference on Differential equations. Loughborough, UK (August 2011)

Russian - French Workshop on Mathematical Hydrodynamics. Lake Baikal, Irkutsk, Russia (Sept. 2011)

Symposium on Recent Trends in Dynamical Systems. Munich, Germany (Jan. 2012)