**Presentations In Professional Conferences:**

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1. Presented “Comparison between fixed point theory and Lyapunov functionals,” University of Central Arkansas, Mathematics Colloquium , February 13, 2007.

2. Presented “Stability in neutral nonlinear differential equations using fixed point theory,” University of Arkansas at Little Rock, Mathematics Colloquium , February 8, 2007.

3. “Boundedness in functional dynamic equations on time scale,” at the Joint Mathematics Meeting, New Orleans, January 8, 2007. ( Invited).

4. “Classification of
positive solutions of nonlinear systems of Volterra integral equations,” The 26^{rd}
Annual Southeastern-Atlantic Regional Conference on Differential Equations at
University of North Carolina, Greensboro, NC, October 27-88, 2006, (invited).

5. “Discretization scheme in Volterra integro-differential equations that preserves stability and boundedness,” at the Joint Mathematics Meeting, San-Antonio, January 11-15, 2006, (invited).

6. “Stability in neutral nonlinear dynamic equations on a time scale with functional delay,” at the 2005 Spring Southeastern Sectional Meeting of the American Mathematical Society, Bowling Green, KY, March 18-19, 2005, (invited).

7. “Positive solutions
for a nonlinear functional dynamical equation on a time scale,” at the 1011^{th}
AMS Meeting, University of Nebraska, Lincoln, Nebraska, October 21-23, 2005,
(invited).

8. Presented “Boundedness in nonlinear functional differential equations with applications to totally nonlinear Volterra

integro-differential equations,” Louisiana State University, Lafayette, Mathematics Colloquium , March 11, 2005.

9. “Exponential stability of dynamic equations on time scales,” at the Joint Mathematics Meeting, Atlanta, January 5-8,

2005, (invited).

109. “Boundedness in functional dynamic equations on time scales,” Conference on Differential and Difference Equations and Applications,” Florida Institute of Technology, Melbourne, FL, August 1-5, 2005, (invited).

11. Positive periodic
solutions of functional discrete systems and population models,” at the 9^{th}
International Conference on Difference Equations and Applications, August 2-6,
2004, University of Southern California, Los Angelos, (invited).

12. “Periodicity in general delay nonlinear difference equations using fixed point theory,” at the Fourth World Congress of Nonlinear Analysts, June 30-July 7, 2004, Orlando, Florida, (invited).

13. “Exponential stability in nonlinear functional differential equations with applications to Volterra integro-differential equations,” The Fourth World Congress of Nonlinear Analysts, June 30-July 7, 2004, Orlando, Florida, (invited).

14. “Boundedness in nonlinear functional differential equations,” The 995th AMS Meeting, Ohio University, Athens, Ohio, March 26-27, 2004, (invited).

15. “Stability in neutral
nonlinear differential equationswith functional delay using fixed point theory,”
The 23^{rd} Annual Southeastern-Atlantic Regional Conference on
Differential Equations at Kennesaw State University, October 17-18, 2003,
(invited).

16. “Positive solutions of three-point nonlinear second order boundary value problem,” International Conference on Industrial and Applied Mathematics, University of New South Wales, Sydney Australia 2003, July 6-12, 2003, (invited).

17. “Boundedness in
nonlinear differential equations,” The 985^{th} AMS Meeting, Indiana
University, Bloomington, Indiana, April 4-6, 2003, (invited).

18. “Positive solutions of
three-point nonlinear discrete second order boundary value problem,” The 22^{nd}
Annual Southeastern-Atlantic Regional Conference on Differential Equations at
The University of Tennessee, October 11-12, 2002, (invited).

19. “Positive periodic solutions of nonlinear functional difference equations,” The Fourth International Conference on Dynamical Systems and Differential Equations at The University of North Carolina, Wilmington, May 24-17, 2002, (invited).

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20. “Stability in linear Volterra integrodifferential equations with nonlinear perturbation,” The 2002 Spring Western Section Meeting, Portland, OR, June 20-22, 2002, (invited).

21. “Uniform asymptotic
stability in nonlinear Volterra discrete systems,” The 21^{st} Annual
Southeastern-Atlantic Regional Conference on Differential Equations, Wake Forest
University, November 2-3, 2001, (invited).

22. “Uniform asymptotic stability in linear Volterra systems with nonlinear perturbation,” The International Conference on Dynamics of Continuous, Discrete And Impulsive Systems at The University of Western Ontario, Canada, July 27-31, 2001, (invited).

23. “Uniform asymptotic stability in linear Volterra difference equations,” The Twentieth Annual Southeastern-Atlantics Regional Conference on Differential Equations at Virginia Tech, October 20-21, 2000, (invited). .

24. “Positive periodic solutions for neutral nonlinear differential equations with functional delay,” The Sectional Meeting of the American Mathematical Society, University of Notre Dame, April 8, 2000, (invited).

25. “Asymptotic stability in linear Volterra difference equations,” The Nineteenth Annual Southeastern- Atlantic Regional Conference on Differential Equations, University of Richmond, October 22-23, 1999, (invited).

26. “Asymptotic stability in linear Volterra difference equations,” The Fifteenth Annual Conference on Applied Mathematics, Central Oklahoma University, February 12-13, 1999, (invited).

27. “Periodic solutions of a nonlinear difference equation with finite delay,” The Eighteenth Annual Southeastern-Atlantic Regional Conference on Differential Equations, Auburn University, October 16-17, 1998, (invited).

28. “Periodic solutions for nonlinear Volterra difference equations with infinite delay,” The 1998 Spring Southeastern Sectional Meeting in the Special Session on Boundary Value Problems for Differential Equations, University of Kentucky, March 20-21, 1998, (invited).

29. “T-periodic solutions and a priori bound”, Midwest -Southeastern Atlantic Joint Regional Conference on Differential Equations, Vanderbilt University, November 7-8, 1997, (invited).

30. “Periodic solutions for nonlinear difference equations,” The Congress on Free Boundary Theory and Applications at Herakleion, Crete, Greece, June 9, 1997, (invited).

31. “Periodic solutions for scalar and vector of nonlinear difference equations,” The Thirteenth Annual Conference on Applied Mathematics, Central Oklahoma University, February 22, 1997, (invited).

32. “Stability and summability of the zero solution of Volterra systems of difference equations,” The American Mathematical Society Southeastern Section Meeting, Louisiana State University, April 21, 1996, (invited).

33. Presented selected results from my Ph.D. Dissertation, University of Dayton, Department of Mathematics Colloquium, March 7, 1996, (invited).

34. “Boundedness and
periodicity of a system of Volterra difference equations,” The 24^{th}
Midwest Differential Equations Conference, University of Nebraska at Lincoln,
October 28, 1995, (invited).