## Presentations

*Mathematics and Music – a harmonious connection*, invited talk at the Mary Washington ElderStudy, December 2014.*Eigentriads – a musical offering*, invited departmental colloquium, Randolph-Macon College, October 2014.*Minimal Kakeya Sets*, invited Discrete Mathematics Seminar talk, Virginia Commonwealth University, September 2014.*Minimal Kakeya Sets*, contributed talk at the 24th British Combinatorial Conference, Royal Holloway – University of London, London, England, July 2013.*Blocking Semiovals and Their Applications in Cryptography*, contributed talk at the 2nd Annual Conference for the Exchange of Mathematical Ideas, University of Northern Iowa, Cedar Falls, IA, June 2013.*Eigentriads – a musical offering*, contributed talk at the MD-DC-VA regional meeting of the Mathematical Association of America, Salisbury University, April 2013.*Student-Centered Learning and Higher Expectations for the Mathematics Major*, presentation at the COPLAC summer faculty institute for liberal learning in the disciplines, Asheville, NC, June 2012.*Anti-blocking Sets,*invited talk at the 2012 Rocky Mountain Discrete Math Days, Colorado State University, Fort Collins, CO, May 2012.*Applications of Pencils of Conics*, invited Discrete Mathematics Seminar, University of Delaware, Newark, DE, May 2012.*Blocking Semiovals and Cryptology*, invited speaker at the Combinatorics, Algebra and Geometry Seminar, George Mason University, November 2011.*Developing problem solving skills*, contributed talk at the MD-DC-VA Section meeting of the MAA, Christopher Newport University, November 2011.*Problem solving with no prerequisites*, session on first-year experiences at*Mathfest*, Lexington, KY, Aug 2011.*On blocking semiovals containing conics*, invited Discrete Mathematics Seminar, University of Delaware, Newark, DE, Oct 2010.*Kirkman’s Schoolgirls wearing hats and walking through fields of numbers*, invited departmental colloquium, CSU Fresno, Fresno, CA, Oct 2010.*Coding, Cryptography and Conics: using what they know to introduce research*, invited faculty seminar, CSU Fresno, Fresno, CA, Oct 2010.*Applying the stuff we like: Blocking Semiovals and Cryptology*, invited Discrete Mathematics Seminar, Virginia Commonwealth University, Richmond, VA, Sept 2010.*Conics in the Projective Plane – theory and applications*, invited departmental colloquium, Embry-Riddle Aeronautical University, Prescott, AZ, April 2010.*Permutation arrays in finite projective spaces*, invited speaker at the International Conference on Designs, Codes, and Geometries in honor of the career of Gary Ebert, Lewes, DE, March 29 – April 2, 2010.*On blocking semiovals containing conics*, invited speaker at the Workshop in Graph Theory and Combinatorics in memory of Uri Peled, Chicago, IL, Feb 21-22, 2010.*Conics in the Projective Plane – theory and applications*, invited plenary speaker at the Fifth Annual East Coast Combinatorics Conference (ECCC), April 30-May 1 2009.*On the Number of k-gons in Finite Projective Planes**, contributed talk at*n International Conference on Finite Geometry to Honor the Career of Norman L. Johnson, San Antonio, TX, March 2009.*Normfest*, a*Teaching Our Students to Think**, invited speaker at the Delaware Council of Teachers of Mathematics fall dinner meeting, Dover, DE, November 2008.**Teaching Our Students to Think: the challenges and benefits of problem solving courses*, keynote address at the Webber Award Ceremony, University of Delaware, Newark, DE, May 2008.*Geometric Techniques in Coding Theory*, invited departmental colloquium, James Madison University, Harrisonburg, VA, March 2008.*Coding Theory Topics for Your Cryptology Course*, contributed talk, MAA Session on Cryptology for Undergraduates, Joint Mathematics Meetings, San Diego, CA, January 2008.*Geometric Techniques in Coding Theory*, invited departmental colloquium, University of Richmond, Richmond, VA, November 2007.*Can you hear me now?… the mathematics behind error-correcting codes*, invited departmental colloquium, Randolph-Macon College, Ashville, VA, February 2007.*Million Dollar Math: Perelman, Poincare, and the million dollar solution*, public lecture on the UMW campus, November 2006.*Geometric Constructions of Optical Orthogonal Codes*, invited speaker – special session on algebraic coding theory, AMS Central Section Meeting at the University of Cincinnati, October 2006.*Geometric Constructions of Codes*, invited speaker – Discrete Mathematics Seminar, University of Delaware, Newark, DE, October 2006.*Creative Uses of Magma in Undergraduate Research*, session presenter, 18th International Conference on Technology in Collegiate Mathematics, Orlando, FL, March 2006.*Geometric Techniques in Coding Theory and Graph Theory*, invited departmental colloquium, Virginia Tech, Blacksburg, VA, November 2005.*Starting a Career in Academia,*invited graduate student seminar, Virginia Tech, Blacksburg, VA, November 2005.*Can you hear me now?… the mathematics behind error-correcting codes*, invited departmental colloquium, Longwood University, Farmville, VA, November 2005.*Mentoring Undergraduates*, invited panelist – special Project NExT session, Joint Mathematics Meetings, Atlanta, GA, January 2004.*Classes of Codes Generated by Quadratic Surfaces of PG(3,q)*, invited speaker – special session on codes and applications, AMS Central Section Meeting at Northwestern University, Chicago, IL, October 2004.*The Endless Search for Reliable Communication*, invited departmental colloquium, Gettysburg College, Gettysburg, PA, October 2004.*LDPC Codes and Graphs from Finite Geometry*, contributed talk – SIAM Conference on Discrete Mathematics, Nashville, TN, June 2004.*Codes, Triangles, and Graphs, Oh My!*, invited speaker – Discrete Mathematics Seminar, University of Delaware, Newark, DE, April 2004.*Correcting Digital Errors – an historical perspective*, invited departmental colloquium, Millersville University, Millersville, PA, November 2003.*Triangle-Free Line Sets and LDPC Codes*, invited speaker – 3rd Pythagorean Conference, Faliraki, Rhodes, Greece, June 2003.*A Construction of Extremal Graphs using Finite Geometry*, invited speaker – special session on extremal combinatorics, AMS Central Section Meeting at Indiana University, Bloomington, IN, April 2003.*Projecting Binary Linear Codes onto Larger Fields*, Combinatorics 2002, Maratea, Italy, June 2002.*On Odd Order 3-dimensional Flag Transitive Planes*, invited speaker – special session on finite projective geometry at the 15th Cumberland Conference, University of Mississippi, Oxford, MS, May 2002.*Projections on Codes*, invited speaker – Discrete and Applied Mathematics Seminar, McGill University, Montreal, Quebec, Canada, April 2002.*Constructing Mixed Partitions of PG(3,q*, Southeastern Combinatorial Conference, Louisiana State University, Baton Rouge, LA, February 2001.^{2})*Mixed Partitions and Spreads of Projective Spaces*, Combinatorics 2000, Gaeta, Italy, May 2000.*The Algebra and Geometry of Translation Planes*, Joint Mathematics Colloquium, Millersville University and F&M College, Lancaster, PA, April 1999.*Extending a Projective Plane*, Joint Mathematics Colloquium, Millersville University and F&M College, Lancaster, PA, April 1998.