1. An inverse problem in diagnostics of constructional elastoplastic medium, Int. Congress of Mathematics, Kyoto, Japan, 21-29 August, 1990.

2. A Computational diagnostics of elastoplastic medium, Int. IMACS Conference, Moscow-Vilnius, 18-23 June, 1990

3. On computational diagnostics of constructional medium, IFAC Workshop "ACQP" , Istanbul, Turkey, 3-5 June, 1992.

4. Computational aspects of an inverse diagnostic problem for an elastoplastic medium 3rd World Congress on Computational Mechanics, Vol. 2-G10-3, 1994, pp.982-983, August 1-15, 1994 Chiba, Japan.

5. Variational approach and numerical solution of two dimensional inverse scattering problem for nonhomogeneous medium WCCM III The Third World Congress on Computational Mechanics, August 1-15, 1994 Chiba, Japan.

6. Inverse scattering problem for nonhomogeneous medium with an approximate boundary condition, International Workshop on Direct and Inverse Electromagnetic Scattering, September 24-30, 1995 TUBITAK, Marmara Research Center, Gebze - Turkey

7. (with J. Mueller) A Numerical method for backward parabolic problems With non-selfadjoint operators, SIAM Annual Meeting, University of Toronto, Canada, July 13-17, 1998.

8. (with J. Mueller) A forward collocation method for the backward parabolic equations, Int. Workshop on Nonlinear and Improperly Posed Problems, Kocaeli University, Izmit-Turkey, August 17-22, 1998.

9. Inverse coefficient problems for monotone potential operators, Int. Workshop on Nonlinear and Improperly Posed Problems, Kocaeli University, Izmit-Turkey, August 17-22, 1998.

10. (with J. Mueller) Numerical solution of the backward parabolic problems with non-selfadjoint operators, Int. Conference on Actual Problems of Applied Mathematics and Mathematical Modeling, Moscow State University, Moscow, Russia, February 19-22, 1999.

11. (with J. Mueller) An analysis of modified Peaceman- Rachford scheme for the non-selfadjoint parabolic problems, Int. Conference on Environmental Mathematical Modeling and Numerical Analysis (EMMNA'99), Rostov State University, Rostov, Russia, May 24-31, 1999.

12. Convexity argument for nonlinear monotone potential operators and convergence of iteration method for nonlinear boundary Value Problems, The Third World Congress of Nonlinear Analysts, July 19-26, 2000, Catania, Italy.

13. Computational material diagnostics in elastoplasticity based on limited indentation tests, The First Int. Conference on Nonlinear Analysis and Nonlinear Modeling, July 17-23, 2001, Fethiye, Turkey

14. Computational material diagnostics based on limited measured data, The First Int. Conference "Inverse Problems: Modeling and Simulation", July 14-21, 2002, Fethiye, Turkey

15. (with B. Pektas) An inverse polynomial method for the identification of the leading coefficient in the Sturm-Liouville operator from boundary measurements. Noise analysis, The First Int. Conference "Inverse Problems: Modeling and Simulation", July 14-21, 2002, Fethiye, Turkey

16. Inverse coefficient problems for monotone potential operators, Int. Conference "Inverse and Ill-Posed Problems", August 5-12, 2002, Novosibirsk, Russia

17. A multisingular inverse coefficient problem for the Sturm-Liouville operator based on boundary measured data, Int. Conference "Computational Methods in Applied Mathematics: CMAM-1", July 20-24, 2003, Minsk, Belarus

18. Nonlocal Identification Problem for Estimation of Sludge Concentration in a Settler, Int. Conference "Computational Methods in Applied Mathematics: CMAM-1", October 8-12, 2003, Novosibirsk, Russia

19. Inverse coefficient problems for monotone potential operators and elastoplastic indentation, The Second Int. Conference "Inverse Problems: Modeling and Simulation", June 07-12, 2004, Fethiye, Turkey

20. (with Z. Seyidmamedov) State discretization step as a regularization parameter in inverse elastoplastic problems, The Int. Conference "Inverse Problems: Modeling and Simulation", June 07-12, 2004, Fethiye, Turkey

21. An analysis of social structure of scientific communications between the Turkish World countries (1991-2005), The First General Assembly of Sociologists of Turkish World Countries, Kocaeli Metropolitan Municipality, November 25-27, 2005, Kocaeli-Izmit, Turkey

22. (with P. DuChateau, B. Pektas) Coefficient in linear parabolic problems based on boundary measured data: Adjoint problem approach and coarse-fine mesh algorithm, The Third Int. Conference "Inverse Problems: Modeling and Simulation", May 29- June 02, 2006, Fethiye, Turkey

23. (with A. Demir) Semigroup approach for identification of the unknown diffusion coefficient in a linear parabolic equation, The Third Int. Conference "Inverse Problems: Modeling and Simulation", May 29- June 02, 2006, Fethiye, Turkey

24. (with P. DuChateau) Parabolic inverse coefficient problems: An analysis of adjoint problem approach and applications, The International Conference "Tikhonov and Contemporary Mathematics", June 19-25, 2006, Moscow, Russia

25. Computational material diagnostics based on limited boundary measurements: An inversion method for identification of elastoplastic properties from indentation , Asian Simulation Conference, October 30- November 01, 2006, Tokyo, Japan

26. Development of a unified approach and software for numerically solving inverse and optimization problems for distributed systems, Workshop INTAS - South-Caucasus 2007: Scientific Cooperation and Collaborative Call, March 28-30, 2007, Tbilisi, Georgia

27. Frechet differentiability and Lipschitz continuity of cost functionals in parabolic and hyperbolic inverse problems: a unified approach, 6th International ISAAC Congress, August 13-18, 2007, Middle East Technical University, Ankara, Turkey

28. (with S. Tatar) Determination of unknown coefficient in a nonlinear elliptic problem related to the elasto-plastic torsion of a bar, 6th International ISAAC Congress, August 13-18, 2007, Middle East Technical University, Ankara, Turkey

U.S.S.R Conferences

1. On Two Mathematical Models in Rolling Contact Problems, I-th Soviet Union Conference "Moscow Univ. Science in Technology", Moscow, 11-16 September (1980).

2. (with A. Efimov and O. Kochin) On Mathematical Models To Define The Hardness of Metals, Scientific Conference in Technology, Baku, 13-17 May, (1984).

3. (with I. Kaporin) The Finite Element Method for Elliptic System of Elasticity, Scientific Conference of Technology, Baku, 13-17 May, (1984).

4. (with A. Efimov) On Local Adaptable Net Method in Contact Problems of Elasticity and Plasticity, III-th Soviet Union Conference of Boundary Problems in Solid Deformable Mechanics, Kharkow, 10-13 June, (1985).

5. Mathematical Modeling and Numerical Foundation of Nondestructive Diagnostics of an Elastoplastic Medium, VI-th Soviet Union Symposium of Theoretical and Applied Mechanics, Tashkent, 17-23 June, (1986).

6. (with A. Efimov and Y. Drozdov) On Mathematical Modeling of Contact Problems in Cylindrical Support Rolling with Temperature Forces, Conference USSR Academy of Sciences on "Developments in Theory of Contact Problems", Lutck, 17-22 June, (1988).

7. On Direct and Inverse Contact Problems, IV-th National Conference on "Boundary Value Problems in Deformable Body", Odessa, 10-13 September, (1989).

8. Computational Express-Diagnostics in Costructional Medium, Conference USSR Academy of Science on "Fundamental Sciences in Technology", Moscow 3-7 October, (1989).

9. Mathematical Foundation of Diagnostics for Ortotropic medium, VII-th Soviet Union Conference on "Polimer and Composite Mechanics", Riga, 17-20 April, (1990).

10. On Computational Diagnostic of Constructional Medium. IFAC WORKSHOP on Automatic Control for Quality and Productivity, Vol.2, pp. L1-L4, 1992, Istanbul, TURKEY

11. (with A. Mamedov) On Qualitative Properties of Elliptic Variational Inequalities and Local Adaptive Finite Element Method,SIXTH National Math.Symp.,Turkey,8-12 September 1993.

Invited Adresses

- Invited speaker, Al-Farabi Kazakhstan Nathional University, Almata, June, 2007,

- Invited speaker, Workshop INTAS - South-Caucasus 2007: Scientific Cooperation and Collaborative Call, 29 March 2007, Tbilisi-Georgia,

- Keynote speaker, Asian Simulation Conference, October 31, 2006, Meiji University, Tokyo, Japan

- Invited speaker, Al-Farabi Kazakhstan Nathional University, Almata, September, 2006.

- Invited speaker, Department of Optimization, Faculty of Applied Mathematics, Baku State University, Baku, Azerbaijan, June, 2003.

- Invited speaker, Koc University, Turkey, October, 2000.

- Invited speaker, University of Catania, Italy, July 23-24, 2000.

- Invited speaker, Dokuz Eylul University, Izmir, Turkey, October 1999.

- Colloquium speaker, Rostov State University, Rostov, Russia, May 1999.

- Invited speaker, University of Nebraska, Lincoln, NE, February 1999.

- Colloquium speaker, Moscow State University, Moscow, Russia, February 1999.

- Colloquium speaker, Arcelik, Research and Developmant Center, Istanbul, Turkey, June 1997.

- Colloquium speaker, Department of Engineering Sciences, Middle East Technical University, Ankara, Turkey, December, 1997.

- Colloquium speaker, University of Nebraska, Lincoln, NE, April 1997.

- Colloqium speaker, Colorado State University, Fort Collins, Colorado, May 1996.

- Invited speaker, Marmara Research Centre, Gebze, Turkey, January 1992.

- Invited speaker, National Mathematics Symposyum, Gazimaguza, Turkey, September 1993.

- Invited speaker, IFAC WORKSHOP "ACQP", Istanbul, Turkey, June 1993.

- Invited speaker, Int. IMACS Conference, Moscow-Vilnius, June 1990.

- Invited speaker, Computational Centre of Moscow State University, May 1988.

- Invited speaker, Institute of Engineering Problems, Ukraynian Academy of Sciences, September 1988.

- Invited speaker at the Seminar on Differential Equations, Institute of Mathematics and Informatics, Lithuanian Academy of Sciences, Vilnus, November 1988.

- Invited speaker, International Conferense on Mathematical Problems in Mechanics, Moscow, April 1986.

- Invited speaker at the Applied Mathematics Seminar, Kharkhov Technology Institute, Ukrayna, June 1985.