- April 29 - May 1, 2023: International Congress on Engineering and Technonlogy Management. (Keynote Speaker)
- January 4-7, 2023: Joint Matematics Meetings, Boston, MA. (Special Session)
- December 8-9, 2022: International Congress on Engineering and Technology Management, Istanbul Turkey. (Keynote Speaker)
- October 27-30, 2022: Mediterranean International Conference of Pure & Applied Mathematics and Related Areas, Antalya Turkey. (Keynote Speaker)
- August 24-26, 2022: International Conference on Control and Optimization with Industrial Applications, Baku Azerbaijan. (Keynote Speaker)
- June 16-18, 2022: International Symposium on Advanced Engineering Technologies, Turkey. (Keynote Speaker)
- May 17, 2022: International Day of Women in Mathematics at IHES (Universite Paris-Saclay), France.
- November 26-27, 2021: Turkish Women Mathematics Association.
- November 12-14, 2021: International Symposium on Biomathematics and Ecology Education and Research, e-BEER 2021.
- November 1, 2021: Workshop on Modelling Immunity.
- September 1-2, 2021: The Second International Conference on Applied Mathematics in Engineering (ICAME). Balikesir, Turkey. 2021. (Special Session).
- June 9-12, 2020: The 13th CHAOS 2020 International Conference. Florence, Italy. Special Session. (Cancelled.)
- November 19-20, 2020: International Conference on Mathematical and Related Sciences: Current Trends and Developments, 2020. (Keynote Speaker)
- July 15-19, 2019: International Congress on Industrial and Applied Mathematics, 2019. Valencia, Spain.
- July 5-9, 2018: The 12th AIMS Conference on Dynamical Systems, Differential Equations and Applications. Taipei, Taiwan. (Special Session)
- May 25, 2018: Colloquium Speaker. Cankaya University. Ankara, Turkey.
- May 5-7, 2018: 5th Turkish Women in Mathematics Workshops. Dicle University, Diyarbakir, Turkey. (Pleanery Speaker)
- January 10-13, 2018: Joint Mathematics Meetings, San Diego, CA. (Special Session)
- October 6-8, 2017: B.E.E.R (Biomathematics and Ecology Education and Research, 2017, Normal, IL.
- July 24-28, 2017: ICDEA 2017, Timisoara, Romania.
- June 5-9, 2017: ICDDEA 2017, Amadora, Portugal.
- July 24-29, 2016: ICDEA 2016 Meeting, Osaka, Japan.
- October 17-18, 2015: AMS 1113 Meeting. University of Memphis, Memhpis, TN. (Special Session)
- October 10-11, 2015: The 35th Southeastern Atlantic Regional Conference on Differential Equations. UNC, Greensboro, NC.
- July 20-24, 2015: The 11th International Conference on Fixed Point Theory and its Applications. Galatasaray University, Turkey.
- June 11-12, 2015: Ankara Math Days. Ankara, Turkey.
- June 8-12, 2015: International Conference on Applied Anlaysis and Mathematical Modelling. Yildiz University, Turkey.
- May 27-30, 2015: The Seventh International Conference on Dynamic Systems and Applications. Morehouse College, Atlanta, GA.
- March 27--28, 2015: Missouri Section of the MAA. Missouri S&T.
- October 11-12, 2014: SEARCDE (Southereastern Atlantic Regional Conference on Differential Equations).
- June 23-26, 2014: International Congress in Honour of Profesor Ravi P. Agarwal. Uludag University, Turkey. (Organizer)
- June 2, 2014: Akdeniz University. Antalya, Turkey. (colloquium speaker)
- May 27-30, 2014: International Conference on Nonlinear Differential and Difference Equations:
Recent Developments and Applications. Antalya, Turkey. (invited speaker)
- April 11-13, 2014: AMS 1100 Sectional Meeting, Texas Tech University, Lubbock, TX.
- October 25-27, 2013: Peterson Conference, University of Nebraska-Lincoln, Lincoln, NE. (Pleanery Speaker)
- October 18-20, 2013: AMS 1094 Sectional Meeting, Washington University. St. Louis, MO. (Special Session)
- July 3-6, 2013: Anatolian Communications in Nonlinear Analysis, Abant Izzet Baysal University, Turkey.
- June 13-14, 2013: Ankara Math Days, Cankaya University, Turkey.
- June 2-5, 2013: International Conference on Applied Analysis and Mathemacital Modeling, Yildiz University, Turkey
- December 17-21, 2012: The International Conference on the Theory, Methods and
Applications of Nonlinear Equations, Texas A&M, Kingsville, TX.
- November 10-11, 2012: Symposium on Biomathematics and Ecology: Education and Research, St. Louis, MO.
- June 26-28, 2012: The 11th International Workshop on
Dynamical Systems and Applications, Cankaya University, Ankara, Turkey.
- May 31, 2012: Ankara Math Days, Bilkent University, Ankara, Turkey.
- May 17-19, 2012: International Conference on Applied Mathematics and Approximation Theory, TOBB,
Ankara, Turkey.
- October 14-16, 2011: Special Session on Dynamic Equations on Time
Scales at the AMS Meeting #1074, UNL, Lincoln, NE.
- June 2-3, 2011: The 6th Ankara Math Days, Hacettepe University,
Ankara, Turkey.
- June 29-July 2, 2011: International Conference on Applied Analysis
and Algebra, Istanbul, Turkey.
- July 10-14, 2010: The 6th International Conference on Dynamical Systems and Applications. Antalya, Turkey.
- June 20-25, 2010: Analysis, Topology and Applications, Vrnjacka Banja, Serbia.
- May 25-28, 2010: The 8th AMS Conference on Dynamical Systems, Differential Equations and Applications, Dresden, Germany.
- March 29, 2010: Festcolloquium. In honour of Professor Dr. Donald A. Lutz on the occasion of his 70th birthday.
- January 13-16, 2010: Joint Mathematics Meetings, San Francisco, CA.
- October 16-18, 2009: Special Session on "Dynamic Equations on Time Scales", AMS Meeting 1051. Baylor University, Waco, TX.
- July-August, 2009: Dr. Agarwal's series of lecturers. Ankara, Turkey.
- July 20-24, 2009: Equadiff 12, Brno, Czech Republic.
- June 819, 2009: Recent Developments in Dynamic Equations on Time Scales, Rocky Mountain Mathematics Consortium, summer school, Laramie, Wyoming. Main Speaker.
- October 10-11, 2008: 28th Southern-Atlantic Regional Conference on Differential Equations, University of Arkansas at Little Rock, Arkansas.
- July 21-25, 2008: 14th International Conference on Difference Equations and Applications, Istanbul, Turkey. Main Speaker.
- July 28-August 2, 2007: Conference on Hnor Allan Peterson, Abbazia di
Novacella, Italy.
- July 23-27, 2007: 12th ICDE, Lisbon, Portugal.
- January 5-8, 2007: Joint Mathematics Meetings, New Orleans.
- July 24-28, 2006: 11th International Conference on Difference Equations and Applications, Kyoto, Japan.
- June 15-20, 2006: Marrakesh World Conference on Differential Equations and Applications, Marrakesh, Morocco.
- May 27, 2006: Ankara Differential Equations Seminars: Middle East Technical University, Ankara, Turkey.
- May 23, 2006: Time Scale Day, Izmir University of Economics, Izmir, Turkey.
- January 12-15, 2006: Joint Mathematics Meetings, San Antonio, TX.
- November 10, 2005: Discrete Calculus to Math 1, UMR.
- November 9, 2005: Running a Succesfull Coloborative Learning Center, NFTS.
- October 21-23, 2005: 1011th AMS Meeting, Lincoln, Nebraska.
- October 7, 2005: Designing and Redesinning Academic Experiences to Enhance Student Learning, NFTS. (Panelist)
- July 25-30, 2005: 10th International Conference on Difference Equations a nd Applications (ISDE), Munich, Germany.
- June 27-August 1, 2005: The First International Workshop on Dynamic Equations, on Time Scales, Istanbul, Turkey.
- June 16-18, 2005: AMS (#1008) Mainz, Germany.
- May 15-17, 2005:
Building Your Academic Portfolio
(NTFS). (Attended)
- March 28-April 1, 2005: The Easter Academy 2005, AbiTuMath Abbacy
of Novacella, Italy.
- January 24-26, 2005: The Teaching Renewal Conference at UMC. (Attended)
- January 5--8, 2005: Joint Mathematics Meetings, Atlanta, GA.
- November 19-20, 2004: 24th Annual Western Kentucky University
Mathematics Symposium, Bowling Green, Kentucky, Dynamic Equations
on Time Scales. (Attended)
- October 23-24, 2004: TA Development Using Case Studies: A Workshop
for Faculty, 1001th AMS Meeting (2004 Fall Central Section
Meeting), NWU, Evanston, IL. (Attended)
- September 30- October 2, 2004: Course Design Retreat (NFTS).
- July 5-10, 2004: Dynamic Systems and Applications,
Antalya, Turkey.
- June 1, 2004: University of New South Wales, Sydney,
Australia.
- April 3-4, 2004: 996th AMS Meeting, University of Southern
California Los Angeles, CA.
- April 1, 2004: Colloquium Talk, San Diego State University,
CA.
- January 7-10, 2004: Joint Mathematics Meetings, Phoenix,
AZ.
- July 28-August 1, 2003: 8th International Conference on
Difference Equations and Applications, Brno, Czech Republic.
- April 4-6, 2003: AMS, Bloomington, Indiana.
- July 8-19,
2002: University of Wyoming, Rocky Mountain Mathematics Consortium
Summer Conference, Laramie, Wyoming.
- September 20-21, 2002: Time Scales Workshop, University of Dayton,
Dayton, OH. (Attended)
- June 11, 2002: Dynamic Equations Day at METU, Ankara-Turkiye.
- March 8-10, 2002: AMS, Atlanta, Georgia.
- January 6-9, 2002: Joint Mathematics Meetings, San Diego, CA.
- October 2001: 970th AMS Meeting at University of Tennessee,
Chattanooga. (Attended)
- July 30--August 3, 2001: Sixth International Conference on
Difference Equations and Applications, Augsburg, Germany.
- October 27--28, 2000: Third Annual Regional Workshop in
Mathematics and Statistics at University of Nebraska--Lincoln.
- October 2000: Fargo Preconference Workshop on BVPs and
Oscillation Theory for Differential Equations on Measure Chains at
North Dakota State University. (Attended)
- October 20--21, 2000: Midwest Differential Equations Conference,
Fargo, ND.
- April 2000: 953rd AMS Meeting at Notre Dame University, Notre
Dame, IN.(Attended)
- January 2000: Joint Mathematics Meetings,
Washington, D.C. (Attended)
- November 20--21, 1999: Second Annual
Regional Workshop in Mathematics and Statistics at University of
Nebraska--Lincoln.
- 1999: MAA Nebraska and Southeast South Dakota Section.
- April 1998: MAA Nebraska and Southeast South Dakota Section at
Hastings College.
- July 1997: RMMC Summer Conference at University of Wyoming,
Laramie, WY. (Attended)