1. Invited to participate and deliver lectures in the Research Program Intermittent and Turbulent Phenomenon in Plasmas Institute of Physics, University of California, Santa Barbara (Jan 18^th to April 18^th 1995).


2. Invited to deliver topical lecture on Nonlinear Aspects of Electron Magnetohydrodynamics at International Conference on Plasma Physics (ICPP-98) Prague.


3. Invited talk in the APS DPP meeting at Seattle on Complexity and Self Organization in EMHD Turbulence Oct (1999).


4. Oral presentation in the APP DPP meeting at Seattle on Electron Magnetohydrodynamics in solar and astrophysical plasmas Oct (1999).


5. Physics department Seminar at UCSD on the topic Wave and Turbulent Phenomena in Electron Magnetohydrodynamics Feb (2000).


6. Invited to participate and deliver lecture in the workshop on Self Organization and Transport in electromagnetic Turbulence at Aix - en - Provence, France. 2^nd-20^th July (2001).


7. Invited to deliver lecture on Complexity in Electron Magnetohydrodynamics Turbulence at the Asia Pacific Radio Science Conference, APRASC 2001, Tokyo Japan 1^st- 4^th August - 2001.


8. Invited to participate and deliver lecture in the workshop on Festivel de Theorie Relaxation in Magnetized Plasmas at Aix - en - Provence, France, 7 ^th - 25^th July (2003).


9. Invited speaker to deliver a talk on Collective Stopping of fast electrons in the problem of fast ignition at International Symposium on Topical problems of nonlinear wave physics, Nizhny Novgorod, Russia 6^th - 12^thSept 2003.


10. Invited to participate and deliver lecture in the workshop on Festivel de Theorie Turbulence overshoot and resonant structures in fusion and astrophysical plasmas at Aix - en - Provence, France, 4^th - 22^nd July (2005).


11. Invited speaker to deliver a talk on Self Organization and wave induced melting of quasi-crystalline patterns in 2-D plasma flows at International conference on Frontiers of nonlinear physics. Nizhny Novgorod, Russia 3^rd - 9^th July 2007.


12. Invited to participate and deliver lecture in the workshop on Festivel de Theorie : Bifurcations, fronts and boundary layers in fusion and astrophysical plasmas at Aix - en - Provence, France, 10 ^th - 22^nd July (2007).


13. Invited to speak on the topic of Theoretical description of electron transport and stopping in fast ignition 1st NILES International workshop on Lasers and Plasmas joined with the 10^th Easter Plasma Meeting at Cairo, Egypt, 15 ^th - 19 ^th March (2008).


14. Invited to deliver an overview talk on Intermittency in Plasma Turbulence at the 2008 ICTP International workshop on the frontiers in modern Plasma Physics.


15. Invited to deliver a topical lecture on Collisionless stopping of current pulses in an inhomogeneous EMHD plasma at the 15th International Congress on Plasma Physics(ICPP) and the 13th Latin American Workshop on Plasma Physics (LAWPP) August 8 - 13, Santiago Chile.


16. Invited to deliver a talk on Collision-less Stopping of Electron Current Pulses in an Inhomogeneous Plasmaat The Kavli Institute for Theoretical Physics, University of California, Santa Barbara 16^th March - 27 ^th May (2011).