75. Real world applications of mathematics, MathFest, the Summer Meeting of the Mathematical Association of America, Lexington, KY, August 2011.

74. Real world applications of mathematics, Seminar at the Citadel, Charleston, SC, April, 2011.

73. STEM Real World Applications Modules, Transforming Undergraduate Education in STEM: Making and Measuring Impacts. 2011 CCLI / TUES Principal Investigators (PIs) Conference, January 26-28, 2011, Washington, D.C.

72. STEM Real World Applications Modules, MAA Poster Session on Projects Supported by the National Science Foundation Division of Undergraduate Education, Joint Mathematics Meetings, New Orleans, January 2011.

71. Quips, Quotes, Humor, and Mathematical Stories, Dinner Presentation, 2010 Spring Meeting og the Seaway Section of the Mathematical Association of America, Oswego, NY, April 2010.

70. STEM Real World Applications Modules, MAA Poster Session on Projects Supported by the National Science Foundation Division of Undergraduate Education, Joint Mathematics Meetings, San Francisco, CA, January 2010.

69. Intermediate Minimal Rankings of Graphs , 23rd Midwest Conference on Combinatorics, Cryptography, and Computing, Rochester, NY, October 2009.

68. Keynote Address, 153rd Commencement of the Oswego, High School, Oswego, NY, June 2009.

67. Your Next Research Project, Dinner Speaker Presentation, New York State Science Congress, Albany, NY, June 2009.

66. Real World Applications of Graph Theory, Spring Meeting of the Seaway Section of the Mathematical Association of America, Rochester, NY, April 2009.

65. Optimal Rankings and Labelings of Graphs, 40th Southeastern International Conference on Combinatorics, Graph Theory, and Computing, Boca Raton, FL, March 2009.

64. Center for Undergraduate Research in Mathematics Panel Presentation , Joint Mathematics Meetings, Washginton, D.C., January 2009.

63. How to Give a Good Poster Presentation, Project NExT Panel Presentation, Joint Mathematics Meetings, Washington, D.C., January 2009.

62. STEM Real World Applications Modules, MAA Poster Session on Projects Supported by the National Science Foundation Division of Undergraduate Education, Joint Mathematics Meetings, Washinhton, D.C., January 2009.

61. Teaching Mathematical Concepts Using Real World Applications, (Invited 50 minute plenary talk), MAA Seaway Section, Fall Meeting, Siena College, Loudonville, NY, October 2008.

60. STEM - Real World Application Modules, Inventions and Impact 2: Building Excellence in Undergraduate Science, Technology, Engineering and Mathematics (STEM) Education, a conference of the NSF/CCLI/DUE Program. August 2008, Washington, D.C.

59. "A Teacher and a Scholar", invited panelist, Project NExT workshop, University of Wisconsin, Madison, July 2008.

58. Real World Applications of Mathematics , colloquia presentation, Clemson University, SC, NSF-REU program, May 2008.

57. Real World Applications of Mathematics , colloquia presentation, Western Carolina University, NC, April 2008.

56. Real World Applications of Mathematics , colloquia presentation, University of North Carolina at Asheville, March 2008.

55. NSF-CCLI Project: STEM Real World Applications Modules, MAA Poster Session on Projects Supported by the National Science Foundation Division of Undergraduate Education, Joint Mathematics Meetings, San Diego, CA, January 2008.

54. Minimal rankings, presentation at the Mini-Conference on Applied Combinatorics with an Emphasis on Search Theory, University of South Carolina, Columbia, SC, October 15-16, 2007.

53. STEM Real World Applications Modules, Presentation at the 38th Southeastern International Conference on Combinatorics, Graph Theory, and Computing, Florida Atlantic University, Boca Raton, FL, March 2007.

52. STEM Real World Applications Modules, MAA Poster Session on Projects Supported by the National Science Foundation Division of Undergraduate Education, Joint Mathematics Meetings, New Orleans, LA, January 2007.

51. Research with Students from Underrepresented Groups at RIT, AMS-NSA Conference on Promoting Undergraduate Research in Mathematics, Chicago, September 2006.

50. Holey Knight's Tours, Presentation at the Joint Mathematics Meetings, San Antonio, TX, January 2006.

49. Necessary and Sufficient Conditions for Tiling with 4x6 and 5x7 rectangles. Presentation at the 19th Midwest Conference on Combinatorics, Cryptography, and Computing, Rochester, NY October 2005.

48. A-rank Numbers for Directed Graphs, Presentation at the 36th Southeastern International Conference on Combinatorics, Graph Theory, and Computing, Boca Raton, FL, March 2005.

47. Ordered Achromatic Numbers of Paths, Cycles, and Trees, Presentation at the Joint Mathematics Meetings, Atlanta GA, January 2005.

46. Minimal k-Rankings of Paths and Cycles, Presentation at the 18th Midwest Conference on Combinatorics, Cryptography, and Computing, Rochester, NY October 2004.

45. Minimal Rankings of Cycles, Presentation at the 35th Southeastern International Conference on Combinatorics, Graph Theory, and Computing, Boca Raton, FL, March 2004 .

44. Ordered Colorings of Graphs, Presentation in the AMS Session on Graph Theory, 2004 Joint Mathematics Meetings, Phoenix, AZ, January 2004.

43. Real-World Applications of Higher Mathematics, Presentation at the Mathematical Association of America, Seaway Section Meeting, RIT, November 8, 2003.

42. Minimal k-Rankings and the A-rank Number of a Path, Presentation at the 34th Southeastern International Conference on Combinatorics, Graph Theory, and Computing, Florida Atlantic University, Boca Raton, FL, March 2003.

41. An Application of Graph Theory to Surface Reconstruction, Presentation in the AMS Session on Combinatorics, II, 2003 Joint Mathematics Meetings, Baltimore, MD, January 2003.

40. Player Rankings with Unavoidable Controversy, Presentation joint with Jennifer
Baldwin, RIT Department of Mathematics and Statistics Colloquium, November 5, 2002.

39. Representations of Graphs Modulo n, Invited Presentation, DIMACS Connect Institute, Research Program on Labelings and Numberings of Graphs, Rutgers University, July 2002.

38. Fibonacci Determinants, Presented at RIT Department of Mathematics and Statistics Colloquium, May 2002 .

37. Fibonacci and Lucas Numbers as Matrix Determinants, Presented at the Mathematics Department Colloquium, Buffalo State College, March 2002,

36. Fibonacci and Lucas Numbers as Matrix Determinants, Presented at the 33rd Southeastern International Conference on Combinatorics, Graph Theory, and Computing at Florida Atlantic University, March 2002.

35. Sequences of Matrix Determinants, Presented at the Department of Mathematics Colloquium, Armstrong Atlantic State University, Savannah, GA, January 2002.

34. An Upper Bound for the Representation of Graphs Modulo n, Presented in the AMS Special Session on Graph Theory, Joint Mathematics Meetings, San Diego, CA, January 2002

33. Controversies in Player Rankings, Presented at the Departments of Mathematics and Computer Science Colloquium, Gettysburg College, Gettysburg, PA, November 2001.

32. Mathematical Java Applets and Virtual Office Hours, Invited panel-presentation, Project NExT, University of Wisconsin, August 2001.

31. Reversing Numbers and a Min/Max Relation for Tournaments, Invited presentation, DIMACS Connect Institute, Graph Theory and Its Applications to Society (Research Program; Tournaments), Rutgers University, NJ, July 2001.

30. CalcLets - Interactive Web-based Learning Tools for Calculus, Invited presentation,
joint with T. J.Murphy, University of Oklahoma, Mathematical Java Conference held at Emporia
State University, KS, June 2001.

29. Reducing the Number of Complaints in Player Rankings, Presented at the Mathematics and Statistics Seminar, Rochester Institute of Technology, Rochester NY May 2001.

28. Powers of Directed Hamiltonian Paths as Feedback Arc Sets, Presented at the 32nd Southeastern International Conference on Combinatorics, Graph Theory and Computing , Louisiana State University, Baton Rouge, LA, March 2001.

27. Animation of Tangent Lines and Areas Using Mathematical Applets, Presented at the 107th Joint Meetings of the AMS and the MAA, New Orleans, LA, January 2001.

26. A Complete Classification of All Tournaments Having a Disjoint Union of Directed Paths as Minimum Feedback Arc Set. Presented at the 107th Joint Meetings of the AMS and the MAA, New Orleans, LA, January 2001.

25. Encloding of Graphs, Presented at the Computer Science Seminar, Rochester Institute of Technology, Rochester NY December 2000.

24. The Rankings Game, presented at the MAA Seaway Section Meeting.
Fredonia, NY, November 2000.

23. Minimum Feedback Arc Sets of Tournaments, presented at the 956th Meeting of the AMS, Central Section, Toronto, CA September 2000.

22. Finite Fields and Infinite Possibilities, Presented at the Rochester Institute of Technology, Rochester NY September 2000.

21. The Reversing Number of a Digraph; Powers of Directed Hamiltonian Paths, Presented at the 31st Southeastern International Conference on Combinatorics, Graph Theory and Computing , Boca Raton, FL, March 2000.

20. The Reversing Number of a Digraph, Presented at the Rochester Institute of Technology, Rochester NY, February 2000.

19. From Euler to Erdos, a 200 Year Old Mathematical Challenge, Presented at Randolph-Macon College, Ashland, VA, February 2000.

18. The Reversing Number of a Digraph, Presented at James Madison University, Harrisonburg, VA, February 2000.

17. The Reversing Number of a Digraph, Presented at the University of Dayton, Dayton, OH, February 2000.

16. From Euler to Erdos, a 200 Year Old Mathematical Challenge, Presented at Transylvania University, Lexington, KY, February 2000.

15. A 200 Number Theory Problem Arrives at Graph Theory's Door, Presented at Youngstown State University, Youngstown, OH, February 2000.

14. The Reversing Number of a Digraph, Presented at the 106th Joint Meetings of the AMS and MAA in Washington, DC, January 2000.

13. Virtual Office Hours Using AOL Instant Messenger, Presented at the 106th Joint Meetings of the AMS and MAA in Washington, DC, January 2000.

12. A Wolf in Sheep's Clothing: Representations of Graphs Modulo n, Poster presentation at Kleitman and Combinatorics; A Celebration" at MIT, August 1999.

11. Fibonacci Determinants, Presented at the 1999 Mathematical Association of America summer meeting, Providence, RI, August 1999.

10. The Reversing Number of a Digraph; A Disjoint Union of Paths, Presented at the 30th Southeastern International Conference on Combinatorics, Graph Theory and Computing Florida Atlantic University, Boca Raton, FL, March 1999.

9. Representations of Graphs Modulo n, Presented at the 104th Joint Meetings of the American Mathematical Society and the Mathematical Association of America, January 1998.

8. Representations of Graphs Modulo n; Cases Involving Nearly Complete Graphs.
Presented at the 100th Joint Meetings of the American Mathematical Society and the
Mathematical Association of America, January 1994.

7. Combinatorial Designs, Graph Theory and Prime Numbers, Presented at the State University of New York, College at Buffalo, October 1999.

6. Orthogonal Latin Squares, Graph Theory and Number Theory, Presented at Western Kentucky University, October 1999.

5. Orthogonal Latin Squares, Graph Theory, and Representations of Graphs Modulo n, Presented, Graduate Student Colloquium, Lehigh University, September, 1999.

4.The Next Fermat Problem and Representations of Graphs Modulo n
Presented at James Madison University, Harrisonburg, VA, March 1999.

3. Orthogonal Latin Squares and Representations of Graphs Modulo n
Presented at Towson University, Towson, MD, February 1999.