• Invited lecturer at Second International Conference on "Basic Science and Advanced Technology", Assiut, Egypt, November 5-9, 2000.

• Invited lecturer at Workshop "Chaos, Demons and Wavelets", Symposium, University of Amsterdam, June 5-7, 2001.

• Lecturer at Workshop "Localization in Nonlinear Lattices", Max Planck Institute for Complex Systems, Dresden, 24-28 September, 2001.

• Invited lecturer at European Advanced Studies Conference,"Nonlinearity, Non-commutativity and Applications", Tracoscan, Croatia, May 9 - 11, 2002.

• Invited lecturer at Summer School/Conference on "Let's Face Chaos Through Nonlinear Dynamics", Maribor, Slovenia, June 29-July 14, 2002.

• Invited lecturer at International Conference "Galaxies and Chaos", Research Center of Astronomy and Applied Mathematics, Academy of Athens, September 16-19, 2002.

• Invited lecturer at European Advanced Studies Conference 4 on "Chaos and Complex Systems" Novacella, Southern Tyrol, Italy, May 29 - June 1, 2003.

• Invited lecturer at International Conference on "Dynamical Chaos in Classical and Quantum Physics", Novosibirsk, August 4-9, 2003 (did not attend).

• Invited lecturer at International Conference on "Invariance and Model Reduction for Multiscale Phenomena" ETH - Zurich, August 26 - 29, 2003.

• Lecturer in “200 Verhulst on Chaos”, Workshop organized by the Royal Academy of Belgium, Brussels, 16-18 September, 2004.

• Invited lecturer at Conference on "Advances in Classical and Quantum Mechanics" held in Novacella, Southern Tyrol, Italy, October 1-4, 2004.

• Invited lecturer at Summer School/Conference on "Let's Face Chaos Through Nonlinear Dynamics", Maribor, Slovenia, June 26-July 10, 2005.

• Lecturer at Workshop on Accelerator Beam Dynamics, Senigallia, Italy, September 12 - 16, 2005.

• Lecturer at Conference “Physics and the City”, Bologna, Italy, December 14 - 17, 2005.

• Plenary Speaker in 2nd International Conference of Nonlinear Science, organized by the Society of Chaos in Psychology and Life Sciences, March 10 – 12, 2006, Heraclion , Crete, Greece.

• Invited speaker at International Conference on the Frontiers of Nonlinear and Complex Systems (ICFNCS) in honor of Prof. Bambi Hu's 60th birthday, Hong – Kong Baptist University, 24-26 May, 2006 (did not attend).

• Invited Speaker at International Conference “Dynamics Days 2006”, Heraclion, Crete, September 25 – 29, 2006.

• Invited Speaker at International Conference “Chaos and Complex Systems 2006”, Monastery of Novacella, Italian Alps, 9th - 12th October 2006.

• Invited Speaker at International Conference “5th Christmas Symposium of Physicists”, 14 - 16 Dec. 2006, Maribor, Slovenia.

• Invited Speaker at International Conference “Complexity, Metastability and Extensivity», University of Catania, Italy, July 1-5, 2007.

• Plenary Speaker in the Conference in Numerical Analysis NumAn2007, “Recent Approaches to Numerical Analysis, Theory and Applications”, Kalamata, Hellas, September 3 - 7, 2007.

• Invited Speaker at International Conference “Nonlinear Dynamics: Advances and Perspectives”, University of Aberdeen, Scotland, September 17 – 22, 2007.

• Invited Speaker at XVth Conference on Applied and Industrial Mathematics (CAIM 2007), Mioveni, Arges county, Romania, October 12-14, 2007.

• Lecturer at Workshop on “Nonlinear Waves in Continuous and Discrete Media”, UNAM, Mexico City, 24 – 28 January 2008.

• Lecturer at 7th Alexander v. Humboldt Colloquium for Celestial Mechanics “The Chaotic Dynamics of Small Bodies and Planets”, Bad Hofgastein, Salzburg, Austria, 30 March - 5 April 2008.

• Invited lecturer at International Conference, “Nonlinear Dynamics and its Applications”, University of Pescara, Italy, July 3 – 8, 2008.

• Invited lecturer at Summer School/Conference on "Let's Face Chaos Through Nonlinear Dynamics", Maribor, Slovenia, June 28-July 13, 2008.

• Invited speaker in “Coping With Complexity: Model Reduction and Data Analysis”, Organized by: University of Leicester, at Ambleside, Lake District, UK, August 31 – September 4, 2009.

• Invited Plenary Lecture at the Meeting of the INCT de Sistemas Complexas, March 1 – 5, 2010, Centro Brasileiro de Pesquisas Fisicas (Brazilian Center of Physics Research), Rio de Janeiro, Brasil.

• Invited lecture at GRTR-Conference on "Statistical Mechanics and Dynamical Systems", Marmaris - Symi, September 5 - 12, 2010.

• Invited lecture at 9th Christmas Physics Conference, Maribor, Slovenia, December 9 - 11, 2010.

• Lecture at 8th Alexander von Humboldt Colloquium for Celestial Mechanics, Bad Hofgastein, Salzburg, Austria, March 20 - 26, 2011.

• Lectures (4 hours) at the 1st International Ph.D. School on “Mathematical Modeling of Complex Systems”, July 18 – 29, 2011, Patras, Greece.

• Presentation of First Year Activities of the “Complex Matter” ERA-NET Project at European Conference on Complex Systems 2011, Vienna, September 12 – 16, 2011.

• Invited lecture on “Complex Hamiltonian Dynamics”, University of Maribor, Slovenia, October 26, 2011.

• Invited Lecture for the 50 years anniversary of the National Research Center “Demokritos”, Athens, Greece, March 22, 2012.

• Invited Lecturer at the “Out of the Box” Conference, Maribor, Slovenia, May 15-17, 2012.

• Lectures (4 hours) at the 2nd International Ph.D. School on “Mathematical Modeling of Complex Systems”, July 16 – 28, 2012, Pescara, Italy. • Lectures (6 hours) at the New Zealand Institute for Advanced Studies, University of Massey, Auckland, New Zealand, on “Mathematical Modeling of Complex Systems”, March 10 – April 10, 2013.

• Lecture at 5th Workshop of INCT – SC on Complex Systems in the Physical Sciences, Centro Brasileiro de Pesquisas Fisicas, 22 – 24 April, 2013.

• Invited Lecture at Universidad Federal de Rio Grande da Norte, “Mathematical Modeling of Complex Systems”, Natal, Brazil, May 10, 2013.

• Invited semi – plenary lecture entitled “Complex Problems in Theoretical and Applied Mechanics”, 10th Congress HSTAM, 25-27 May, 2013, Chania, Crete, Greece.

• Lectures (4 hours) at the 3d International Ph.D. School on “Mathematical Modeling of Complex Systems”, July 15 – 26, 2013, Heraklion, Crete, Greece.

• Lectures (4 hours) at the 4th International Ph.D. School on “Mathematical Modeling of Complex Systems”, July 14 – 25, 2014, Athens, Greece.

• Invited Lecture at the Conference "Statistical Mechanics Foundations of Complexity - where do we stand now?", May 8 – 10, 2014, Santa Fe, Institute, Santa Fe, New Mexico, USA.

• Invited Lecture in the Special Session" Dynamics of chaotic and complex systems and applications" (SS25), at the 10th AIMS Conference on Dynamical Systems, Differential Equations and Applications, Madrid, Spain, July 7-11, 2014.

• Invited Lecturer (5 hours) at 9th Summer School/Conference on "Let's Face Chaos Through Nonlinear Dynamics", Maribor, Slovenia, 22 June - 6 July, 2014.

• Lecturer and organizer of the Workshop “Mathematical Modeling of Complex Systems: Computational Approaches”, NumAn Conference on“Recent Approaches to Numerical Analysis: Theory, Methods and Applications”, Chania, Crete, 2 – 5, September, 2014.

• Invited Lecture at European Advanced Studies Conference 2014, Symposium on Differential Equations and Difference Equations, Homburg, Geramny, September 5 – 8, 2014.

• Invited Lecture at Symposium on “Classical and Quantum Chaos: What Comes Next?”, Ljubljana, Slovenia, October 9 – 11, 2014.

• Invited lectures at the Physics Department and The Singapore Institute for Neurotechnology of the National University of Singapore, December 10 – 15, 2014.

• Invited Plenary Lecture at International Conference IMSQUARE, 4th International Conference on Mathematical Modeling in Physical Sciences, June 5-8, 2015 Mykonos, Greece.

• Invited Lectures at Weizmann Institute of Science, Department of Chemical Physics (invited by Professor Itamar Procaccia), June 18 – 25, 2015.

• Invited Lecture at the Center for Theoretical Physics of Complex Systems, Institute of Basic Science, Daejeon, Korea, 1-11 September 2015.

• Invited Lecturer at the Latin-American School and Workshop on Complex Systems, Centro Brasileiro de Pesquisas Fisicas, Rio de Janeiro, Brazil, 18 – 30 October, 2015.

• Invited Visitor and Lecturer at Nazarbayev University, Astana, Kazakhstan (23-28 November, 2015).

• Invited lecture at International “Christmas Physics Symposium”, December 10 – 12, 2015, Maribor Slovenia.

• Lecture at “Dynamics of Complex Systems”, International Conference in honor of Robert MacKay’s 60th Birthday, 18 – 20 May, 2016, University of Warwick, UK.

• Invited speaker at the “Dynamics Days Latin America and the Caribbean”, Puebla Mexico, October 24 – November 1, 2016.

 

Conference and Summer School Organization:

• One of 12-member organizing committee for a Workshop on ''Orbital Dynamics and Applications to Accelerators'', March 7-12, 1985, Lawrence Berkeley Lab., USA.

• Chairman of organizing committee for International Conference on ''Non-linear Dynamics and Chaos'', Aug. 25-30, 1986, Thessaloniki, Greece.

• Chairman of organizing committee for ''Summer School I on Nonlinear Systems'', July 1-11, 1987, Patras, Greece.

• One of 3-member organizing committee for the International Conference ''Singular Behavior and Nonlinear Dynamics'', August 18-26, 1988, Samos, Greece.

• Organizing committee member for 2nd, 3rd 4th and 5th ''Summer School on Nonlinear Systems'' (July 1988, August 1989 and August 1990, Samos, Greece and July, 1992, Crete, Greece).

• Director of NATO Advanced Research Workshop on ''Proton Transfer in Hydrogen-Bonded Systems'', May 21-25, 1991, Heraclion, Crete, Greece.

• Director of NATO Advanced Studies Institute on ''Chaotic Dynamics: Theory and Practice'', July 11-20, 1991, Patras, Greece.

• Organizing Committee member of ''Integrability and Chaotic Behavior in Hamiltonian Systems'', NATO ARW, June 28 - July 2, 1993, Torun, Poland.

• Organizing Committee Chairman for 6th, 7th, 8th, 9th, 12th, 14th, 15th and 16th Summer School/Panhellenic Conference) on ''Nonlinear Systems and Chaotic Dynamics", University of Patras, Greece, July 1993, Xanthi, July 1994 and July 1995, Patras, July 1996, Patras, July 1999, Patras, July 2001, Patras, August 2002 and Chalkis, July 2003.

• Organizing Committee Member for 10th,11th and 13th Summer School/Panhellenic Conference) on ''Nonlinear Dynamics: Chaos and Complexity", Thessaloniki, 1997, Livadeia, 1998 and Chania, 2000.

• Organizing Committee member for International Summer School and Conference on ''Let's Face Chaos Through Nonlinear Dynamics'', Maribor, Slovenia, June 1996, June 1999, June 2002 and June 2005 and June 2008.

• Session Chairman for 4th Conference of Greek Association of Computational Mechanics, Patras, June 27-29, 2002.

• Session Chairman for1st International Conference “From Scientific Computing to Computational Engineering” 1st IC-SCCE, Athens, 8-10 September, 2004.

• Organizing Committee Chairman for International Summer School and Conference on ''Complexity in Science and Society'', 14 – 26 July, 2004, Patras and Olympia, Greece.

• Organizing Committee Chairman for the 18th Summer School/Panhellenic Conference on ''Nonlinear Science and Complexity", Volos, Greece, 18 – 30 July 2005.

• Co – Chairman of the Organizing Committee (with Prof. E. Aifantis of the University of Thessaloniki) of the 19th Summer School/Panhellenic Conference on ''Nonlinear Science and Complexity", Thessaloniki, Greece, 12 – 22 July 2006.

• Organizing Committee Chairman for the International Gathering at Cuernavaca on “Nonlinear Lattice Dynamics: From Localization to Statistical Mechanics”, Centro Internacional de Ciencias, Universidad de Morelos, Cuernavaca, Mexico. , 8 – 24 January, 2007.

• Organizing Committee Chairman for the 20th Summer School/Panhellenic Conference on ''Nonlinear Science and Complexity", Patras, Greece, 14 – 26 July 2007.

• Organizing Committee member for Workshop on “Nonlinear Waves in Continuous and Discrete Media”, UNAM, Mexico City, 24 – 28 January 2008.

• Organizing Committee member for Workshop on “Nonlinear Dynamics and Its Applications”, University of Chieti – Pescara, Italy, 3 – 8 July 2008.

• Co – Chairman of the Organizing Committee (with Prof. K. Hizanidis of the National Technical University of Athens) of the 21st International Summer School – Conference on ''Nonlinear Science and Complexity", Athens, Greece, 21 July – 2 August 2008.

• Organizing Committee Chairman for the 22nd Summer School/Panhellenic Conference on ''Nonlinear Science and Complexity", Patras, Greece, 15 – 24 July, 2009.

• Organizing Committee Member for Workshop on “Nonlinear Dynamics and Complex Systems”, University of Chieti – Pescara, Italy, July 28 – 31, 2009.

• Organizing Committee Chairman of University of Patras Workshop, "Control of Dynamical Systems: Theory and Applications", February 19-20, 2010, Achaia Beach Hotel

• Organizing Committee Chairman of Synthesis Workshop, "Conflict and Risk in Dynamical Processes", Thursday, December 22, 2011, Conference Center of the University of Patras

• Organizing Committee Chairman of the 1st International Ph.D. School on “Mathematical Modeling of Complex Systems”, July 18 – 29, 2011, Patras, Greece.

• Organizing Committee Member of the 2nd International Ph.D. School on “Mathematical Modeling of Complex Systems”, July 16 – 28, 2012, Pescara, Italy.

• Organizer of Mini – Symposium on “Complex Problems in Theoretical and Applied Mechanics”, at the 13th Congress of HSTAM, 25-27, May, 2013, Chania, Crete.

• Organizing Committee Co – Chairman of the 3d International Ph.D. School on “Mathematical Modeling of Complex Systems”, July 15 – 27, 2013, Heraklion, Crete, Greece.

• Organizing Committee Co – Chairman of the 4th International Ph.D. School on “Mathematical Modeling of Complex Systems”, July 14 – 25, 2014, Athens, Greece.

• Organizer of Symposium on Mathematical Modeling of Complex Systems: Computational Approaches”, NumAn Conference on “Recent Approaches to Numerical Analysis: Theory, Methods and Applications”, Chania, Crete, 2 – 5, September, 2014.

• Organizing Committee Chairman of the 5th International Ph.D. School on “Mathematical Modeling of Complex Systems”, July 20 – 30, 2015, Patras, Greece.

• Organizing Committee Member for the 23rd Summer School/Panhellenic Conference on ''Dynamical Systems and Complexity", Chalkidiki, Greece, 27/8/2016 – 3/9/2016

• Organizing Committee Member for the 24th Summer School/Panhellenic Conference on ''Dynamical Systems and Complexity", Volos, Greece, 12 – 20 July, 2017.