Invited Lectures

"It usually takes more than three weeks to prepare a good impromptu speech."

Mark Twain

Total Number of Invited Presentations: 282

2013

At Universities and Colleges:
  1. Mathematics Club Lecture, New York University Abu Dhabi, Abu Dhabi, United Arab Emirates, May 4, 2013. "Reconfiguration of Geometric Linkages."
In the Community:
  1. Career Day Presentation, The American Community School of Abu Dhabi, Abu Dhabi, United Arab Emirates, February 28, 2013. "Computer Science: One of the Fastest Growing Occupations."


2012

At Conferences:
  1. Keynote Speaker, The International Conference on Pattern Recognition and Image Processing, Kuala Lumpur, Malaysia, December 29-30, 2012. "Measuring Similarity for Musical Rhythm Recognition."
  2. Invited Lecture, Workshop on Robotics, Intelligent Systems and AI in the Gulf Cooperation Council and Beyond, New York University Abu Dhabi, Abu Dhabi, United Arab Emirates, June 18, 2012. "Computational Geometric Applications in Robotics."
  3. Roundtable Discussion, Fourth International Symposium on the Music of Africa, Princeton University, Princeton, New Jersey, March 3, 2012. "Current Trends in Scholarship."
  4. Invited Lecture, Fourth International Symposium on the Music of Africa, Princeton University, Princeton, New Jersey, March 2, 2012. "Phylogenetic Analysis of African Rhythm Timelines."
At Universities and Colleges:
  1. Seminar, Department of Computing, Goldsmiths University of London, London, U.K., October 12, 2012. "Proximity-Graph Instance-Based Learning, Support Vector Machines, and High Dimensionality: An Empirical Comparison."
  2. Seminar, Department of Computing, Goldsmiths University of London, London, U.K., August 28, 2012. "Computational Methods for the Analysis of African Rhythm Timelines."
  3. Basser Seminar Series, School of Information Technology,  University of Sydney, Sydney, Australia, June 22, 2012. "Computational Methods for the Analysis of Musical Rhythm Timelines."
In the Community:
  1. Career Day Presentation, The American Community School of Abu Dhabi, Abu Dhabi, United Arab Emirates, February 23, 2012. "Geometry and Music in Computer Science."


2011

At Conferences:
  1. Workshop on Rhythm in Speech and Music, Centre for Interdisciplinary Research in Music Media and Technology, The Schulich School of Music, McGill University, Montreal, Canada, April 21, 2011. "Do There Exist Any Nontrivial Features of Durational Rhythms that Correlate with Perceptual Similarity?"
At Universities and Colleges:
  1. Seminar, School of Engineering, Brown University, Providence, Rhode Island, June 14, 2011. "Proximity Graphs for Instance-Based Machine Learning and Other Applications."
  2. Seminar, New York University Abu Dhabi, Abu Dhabi, United Arab Emirates, May 4, 2011, Downtown Campus, 3:00 PM. "Computational Tools for the Analysis of Musical Rhythm."
  3. Computer Science Colloquium, Department of Computer Science, New York University, March 23, 2011, 11:30 A.M., Warren Weaver Hall, 251 Mercer Street, Manhattan, New York. "Computational Geometry: Paradigms for Bridging Disciplines."
  4. Computer Science Seminar, Department of Computer Science and Engineering, Polytechnic Institute of New York University, March 22, 2011, 11:00 A.M., Six MetroTech Center, Brooklyn, New York. "Computational Geometry: Paradigms for Bridging Disciplines."

2010

At Conferences:
  1. Special Session on Mathematics and the Arts, American Mathematical Society Fall Southeastern Meeting, Richmond, VA, November 6-7, 2010, "Mathematical Property-Preserving Shellings of Musical Rhythms."
  2. Session 2A, Studies in Rhythm and Meter, First International Conference on Analytical Approaches to World Music, University of Massachusetts at Amherst, February 20, 2010, "Phylogenetic Techniques for Musical Rhythm Analysis."
  3. Panel Discussion, First International Conference on Analytical Approaches to World Music, University of Massachusetts at Amherst, February 21, 2010, "A Memetic-Characterization Approach to Temporal Organization in World Music."
At Universities and Colleges:
  1. Seminar, Department of Human Evolutionary Biology, Harvard University, November 12, 2010, 11:00 A.M., 11 Divinity Avenue, Cambridge, Massachusetts. "Measuring Musical Rhythm Similarity: Transformation
    versus Feature-Based Methods    ."
  2. Seminar, Department of Engineering, University of Michigan-Shanghai Jiao Tong University Joint Institute, Shanghai, China, April 21, 2010, "Computational Geometry, Bioinformatics, Crystallography, and Musical Rhythm: A Synergistic Relationship."


2009

At Conferences:
  1. CRA-C/CDC Workshop on Computational Geometry, Tufts University, Sunday, November 16, 2009. "The Geometry of Musical Rhythm."
  2. Conference on the Applications of Computer Algebra, ACA-2009, University of Quebec at Montreal, Ecole de Technologie Superieure, June 25-28, 2009. "Analysis and Generation of Symbolically Represented Musical Rhythm."
  3. Session Devoted to the 60th Birthday of Antonio Mesa, 8th International Workshop on Operations Research (Operations Research for the Welfare of Human Beings), March 2-6, 2009, Havana, Cuba."The Complexity of Musical Rhythm."
At Universities and Colleges:
  1. Distinguished Speaker Colloquium, College of Computer Science and Technology, Jilin University, Changchun, China, Monday December 28, 2009, "The Geometry of Musical Rhythm."
  2. Computer Science Theory Group Seminar, Department of Computer Science and Engineering, Fudan University, Shanghai, China, Tuesday, December 22, 2009, "The Geometry of Musical Rhythm."
  3. Seminar, Department of Human Evolutionary Biology, Harvard University, October 23, 2009, 10:00 A.M., 11 Divinity Avenue, Cambridge, Massachusetts. "Phylogenetic Analysis of Musical Rhythms."
  4. Public Lecture, Harvard University, Radcliffe Institute for Advanced Study, Cambridge, Massachusetts, October 14, 2009, 4 P.M., Radcliffe Gymnasium, 10 Garden Street, Radcliffe Yard. "Phylogenetic Analysis of The Musical Rhythms of the World."
  5. Computer Science Seminar, Department of Computer Science, University of Perugia, Perugia, Italy, July 14, 2009.  "Analysis and Generation of Symbolically Represented Musical Rhythm."
  6. Computer Science Seminar, Department of Computer Science, University of Pisa, Pisa, Italy, July 8, 2009.  "Analysis and Generation of Symbolically Represented Musical Rhythm."


2008

At Conferences:
  1. Invited Lecture, Session on Algorithmic Mathematics, Canadian Mathematical Society Winter Meeting, December 6-8, 2008, Ottawa, Ontario, Canada."Designing a Mathematical Measure of Musical Rhythm Complexity: Trials and Tribulations". (Abstracts Booklet, p. 19)
  2. Plenary Lecture, ICISP-2008, International Conference on Image and Signal Processing, July 1-3, 2008, Cherbourg-Octeville, France."Point Pattern Matching in One Dimension: Applications to Music Information Retrieval".
  3. Joint Meeting of the Statistical Society of Canada and the Societe Francaise de Statistique, May 25-29, 2008, Ottawa Congress Centre. (invited session #26). "Instance-Based Learning with Proximity Graphs."
  4. Opening Lecture, Canadian Conference on Computer Science and Software Engineering, May 12-13, 2008, Concordia University, Montreal, Canada. "Computational Tools for Ethnomusicology."
At Universities and Colleges:
  1. Opening Lecture, Alumni Open House at the School of Computer Science, McGill University, Montreal, Canada, May 16, 2008. "Geometry, Rhythm, and Dance: An Eternal Computational Braid."
  2. Lecture-Workshop, Department of Education, University of Montreal, Montreal, Canada, March 15, 2008, "The Mathematics of Musical Rhythm."
  3. Guest Lecture in BASC-201, Integrative Topics in Arts and Science, McGill University, Montreal, Canada, January 17, 2008, "The Mathematics and Computer Science of Rhythm and Melody - I."
  4. Guest Lecture in BASC-201, Integrative Topics in Arts and Science, McGill University, Montreal, Canada, January 22, 2008, "The Mathematics and Computer Science of Rhythm and Melody - II."


2007

At Conferences:
  1. Plenary Lecture, KyotoCGGT-2007, The Kyoto International Conference on Computational Geometry and Graph Theory (in honor of Jin Akiyama and Vasek Chvatal), Kyoto, Japan, June 11, 2007, "Comparing Musical Sequences via Linear Assignment Problems." (Abstract)
  2. Special Session, CMS-MITACS Joint Conference 2007, Delta Hotel, Winnipeg, Canada, June 2, 2007, "Facility Location Problems for Computational Musicology." (Abstract)
  3. Innovations in Mathematics Education via the Arts, BIRS Workshop at the Banff Research Station, Banff, Alberta, Canada, January 22-26, 2007, "Teaching Geometry via Musical Rhythm." (Abstract)
  4. Special Session on Mathematical Techniques in Music Analysis - I, 113th Annual Meeting of the American Mathematical Society, New Orleans, U.S.A., January 6, 2007,  "Elementary Proofs of the Hexachordal Theorem."
  5. Informal Session on Mathematical and Computational Studies of Rhythm, 113th Annual Meeting of the American Mathematical Society, New Orleans, U.S.A., January 5, 2007,  "Rhythm Similarity Measures for Phylogenetic Analysis."
At Universities and Colleges:
  1. CIRMMT Seminar Series, Centre for Interdisciplinary Research in Music Media and Technology, Schulich School of Music, McGill University, Montreal, Canada, Thursday November 29, 2007, "Perception of Meter Similarity in Flamenco Music."
  2. U0/U1 Comp Orientation Tutorial, School of Computer Science, McGill University, Montreal, Canada, Monday November 5, 2007, "Mathematical and Computational  Aspects of Musical Rhythm ".
  3. CSUS (Computer Science Undergraduate Society) Donut-Break Presentation,  School of Computer Science, McGill University, Montreal, Canada, Tuesday October 30, 2007, "Mathematical and Computational  Aspects of Musical Rhythm ".
  4. The Honours Science Guest Lecture,  Marianopolis College, Montreal, Canada, Thursday October 4, 2007, 12:50-2:00pm, "Mathematical and Computational  Aspects of Musical Rhythm ".
  5. The Valley Geometry Seminar, University of Massachusetts, Amherst, Mass., Friday April 20, 2007, 4:00-5:00pm,  "Musical Rhythm and Computational Mathematics".
  6. Guest Lecture in BASC-201, Integrative Topics in Arts and Science, McGill University, Montreal, Canada, January 11, 2007, "Musical Rhythm and Computational Mathematics - I."
  7. Guest Lecture in BASC-201, Integrative Topics in Arts and Science, McGill University, Montreal, Canada, January 16, 2007, "Musical Rhythm and Computational Mathematics - II."
On Television:
  1. Radio-Canada-TV, "Science and Society: Flamenco and Mathematics - Decouverte," Sunday March 18, 2007. Documentary on "Mathematics and Flamenco", produced by Michel Rochon and Yves Levesque (in French).


2006

At Conferences:
  1. Special Lecture, London Mathematical Society and Real Sociedad Matematica Española, Madrid, Spain, August 25, 2006,  "Musical Rhythm and Computational Mathematics," International Congress of Mathematicians, Astracts of Plenary Lectures, Invited Lectures, and Special Activities, European Mathematical Society, p. 106. (Abstract)
At Universities:
  1. Algorithms Seminar, School of Computer Science, McGill University, October 11, 2006, "Computational Geometric Aspects of Musical Rhythm."
  2. The Department of Computer Science and Software Engineering and the Computer Science Graduate Education Committee Interdisciplinary Lecture, Concordia University, Tuesday, March 28, 2006, 3:30PM, EV-2.184 lecture hall, Poster, "Computational Methods for the Analysis and Generation of Musical Rhythm Timelines."
  3. COLLOQUES du DIRO, Department of Computer Science and Operations Research, University of Montreal, March 16, 2006, "Computational Methods for the Analysis and Generation of Musical Rhythm Timelines."
  4. SOCS-Colloquium, School of Computer Science, McGill University, January 13, 2006, "Computational Methods for the Analysis and Generation of Musical Rhythm Timelines."
  5. Guest Lecture in BASC-201, Integrative Topics in Arts and Science, McGill University, Montreal, Canada, January 10, 2006, "The Mathematics and Computer Science of  Rhythm and Melody - II."
  6. Guest Lecture in BASC-201, Integrative Topics in Arts and Science, McGill University, Montreal, Canada, January 5, 2006, "The Mathematics and Computer Science of  Rhythm and Melody - I."
On Television:
  1. Global-TV, "This Morning Live," interviewed by Richard Dagenais, June 29, 2006. Presentation of my research on the phylogenetic analysis of rhythmic patterns (meters or compass) in Flamenco music.
2005
At Conferences:
  1. Graduate Summer School: Intelligent Extraction of Information from Graphs and High Dimensional Data, Institute for Pure and Applied Mathematics, University of California at Los Angeles, July 25, 2005, "Proximity Graphs for Instance-Based Learning."
  2. 55th Session of the International Statistics Institute, Sydney, Australia, April 12, 2005, "Geometric Decision Rules for High Dimensions."
At Universities:
  1. UdeM-McGill-MITACS Machine Learning Seminar, School of Computer science, McGill University, October 12, 2005, "Musical Rhythm Similarity Measures with Symbolic Input: Models, Algorithms, and Applications."
  2. Computer Science Colloquium, Department of Computer Science, Tufts University, Medford, Massachussetts, April 27, 2005, "Computational Methods for the Analysis and Generation of Musical Rhythm Timelines."
  3. African Music Systems Lecture, Department of Music, Tufts University, Medford, Massachussetts, April 28, 2005, "Computational Methods for the Analysis and Generation of Musical Rhythm Timelines."
  4. Computationl Geometry Guest Lecture, School of Information Technologies, University of Sydney, Thursday April 14, 2005, "Voronoi Diagrams, Proximity Graphs, and Applications to Instance-Based Learning."
  5. The Basser Seminar Series, School of Information Technologies, University of Sydney, Wednesday April 13, 2005, "Computational Methods for the Analysis and Generation of Musical Rhythm Timelines."
  6. Guest Lecture in COMP-644, Pattern Recognition, McGill University, Montreal, Canada, March 23, 2005, "Geometric Decision Rules for High Dimensions."
  7. Research Colloquium, Centro de Investigacion en Matematica Pura y Aplicada, Escuela de Matematica, Universidad de Costa Rica, San Jose, Costa Rica, February 28, 2005, "Constructing Polyhedra with Specified Points as their Vertices."
  8. CIRMMT Lecture, Center for Interdisciplinary Research in Music Media and Technology, Faculty of Music, McGill University, Montreal, Canada, February 18, 2005, "Computational Methods for the Analysis and Generation of Musical Rhythm Timelines."
  9. Guest Lecture in COMP-644, Pattern Recognition, McGill University, Montreal, Canada, February 16, 2005, "Music Recognition."
  10. Guest Lecture in BASC-201, Integrative Topics in Arts and Science, McGill University, Montreal, Canada, January 11, 2005, "The Computer Science of Melody."
  11. Guest Lecture in BASC-201, Integrative Topics in Arts and Science, McGill University, Montreal, Canada, January 6, 2005, "The Computer Science of Rhythm."
2004
At Conferences:
  1. Canadian Mathematical Society Winter 2004 Meeting, Montreal, Canada, December 11-13, 2004, "On constructing a polyhedron from its vertex set."
  2. 14th Annual Fall Workshop on Computational Geometry, Massachussetts Institute of Technology, November 19-20, 2004, "Computational Geometric Aspects of Musical Rhythm."
  3. Workshop on Data Mining Methodology and Applications, The Fields Institute, Toronto, Canada, October 28-30, 2004, "Proximity Graph Methods for Data Mining."
  4. Japan Conference on Discrete and Computational Geometry, Tokay University, Tomigaya, Shibuya-ku,Tokyo, Japan, October 8-11, 2004, "The Geometry of Musical Rhythm."
  5. Plenary Lecture, Third International Conference on FUN with Algorithms, Isola d'Elba, Italy, May 26-28, 2004, "Rhythm and Mathematics: Problems at the Interface."
  6. Illustrated Conference, PERCUBA-2004: 15th International Percussion Festival, Instituto Superior de Arte, Havana, Cuba, April 20-24, 2004, "Nuevas Formas de Ensenar las Claves Binarias y Ternarias Afrocubanas por Medio de Matematica y Geometria."
At Universities
  1. Algorithms Seminar, School of Computer Science, McGill University, Wednesday, November 17 2004, "Computational Geometric Aspects of Musical Rhythm."
  2. McGill Computational Science and Engineering Seminar, Friday September 24, 2004, "Linkage Reconfiguration: Geometric and Computational Aspects with Applications to Knot Theory, Robotics, Polymer Physics, and Bioinformatics".
  3. Computing Science Seminar, Simon Fraser University, Burnaby, Canada, March 26, 2004, "Mathematical Measures of Syncopation in Musical Rhythm."

2003

At Conferences:
  1. Geometry Day, University of North Texas, Denton, Texas, U.S.A., October 25, 2003, "On Polyhedra Induced by Point Sets in Space."
  2. First International Workshop on Computational Music Theory, Universidad Politecnica de Madrid, Escuela Universitaria de Informatica, June 30 to July 4, 2003, "Computational Music Theory."
  3. First Joint International Meeting of the American Mathematical Society and the Real Sociedad Matematica Española, University of Sevilla, Sevilla, Spain, June 18-21, 2003, "On Polyhedra Induced by Point Sets in Space."
  4. International Conference on Computational Science and its Applications, Montreal, Canada, May 18-21, 2003, "Geometric Graphs for Improving Nearest Neighbor Decision Rules."
At Universities:
  1. Mathematics Seminar, Department of Applied Mathematics, Universidad Politecnica de Madrid, July 10, 2003, "Simple proofs of a geometric property of four-bar linkages."
  2. Seminar, Departmento de Ciencias Experimentales y Ingenieria, Universidad Rey Juan Carlos, Mostoles, Madrid, Spain, July 9, 2003, "On polyhedra induced by point sets in space."
  3. Mathematics Seminar, Centro de Investigacion en Matematica Pura y Aplicada, Escuela de Matematica, Universidad de Costa Rica, San Jose, Costa Rica, February 25, 2003, "Geometric Proximity Graphs for Improving Nearest Neighbor Decision Rules."

2002

At Conferences:
  1. CASCON-2002, Workshop on Pattern Recognition and Prediction, Hilton Suites Toronto-Markham, Toronto-Markham, Canada, October 2, 2002, "Proximity Graphs for Instance-Based Learning."
  2. Facility Location Optimization Workshop, Simon Fraser University, Burnaby, B.C. Canada, June 16-18, 2002, "Optimal Location of Prototypes for Nearest Neighbor Classification."
  3. Interface-2002, 34th Symposium on Computing and Statistics (theme: Geoscience and remote Sensing), Ritz-Carlton Hotel, Montreal, Canada, April 17-20, 2002, "Proximity Graphs for Nearest Neighbor Decision Rules: Recent Progress."
At Universities:
  1. Computing Science Seminar, Simon Fraser University, Burnaby, November 27, 2002, "Geometric Methods for Improving Nearest Neighbor Decision Rules."
  2. Computing Science Seminar, Simon Fraser University, Burnaby, November 13, 2002, "Classification and Phylogenetic Analysis of African, Brazilian and Cuban Clave Rhythms."
  3. Computing Science Seminar, Simon Fraser University, Burnaby, October 30, 2002, "The Four-Bar Linkage: Applications and Simple Proofs of a Geometric Property."
  4. Seminar, School of Computing, Queens University, Kingston, Canada, October 3, 2002, "Proximity Graphs for Instance-Based Learning."
  5. Seminar, Centre for Intelligent Systems and their Applications (CISA), University of Edinburgh, Edinburgh, Scotland, September 10, 2002, "Proximity Graphs for Instance-Based Learning."
  6. Seminar, Departmento de Ciencias Experimentales y Ingenieria, Universidad Rey Juan Carlos, Mostoles, Madrid, Spain, June 28, 2002, "Proximity Graphs for Nearest Neighbor Pattern Classification."

2001

At Conferences:
  1. IX Encuentros de Geometria Computacional, University of Girona, Girona, Spain, July 2-4, 2001, "Open Problems in Reconfiguration of Polygons in Space."
  2. 965th Meeting of the American Mathematical Society, University of Nevada, Las Vegas, USA, April 21-22, 2001, "Convexifying polygons in 3D: A survey." Abstract # 965-51-108, p. 36.

2000

At Conferences:
  1. 957th Meeting of the American Mathematical Society, University of Toronto, Canada, September 23-24, 2000, "Recent results on reconfiguring polygonal chains in space."
  2. Keynote Address, SPIE International Symposium on Optical Science and Technology, Vision Geometry IX, San Diego, California, July 30 - August 4, 2000, "The complexity of computing nice viewpoints of objects in space."
  3. SIAM Discrete Mathematics Meeting, Minneapolis, Minnesota, June 12-15, 2000, "Convexifying polygonal linkages in space and its applications to knot theory, polymer physics and molecular biology."
  4. Meeting of the American Mathematical Society, University of Massachusetts at Lowell, in Lowell, Massachussetts, April 1-2, 2000, "Recent results on untangling unknots in space."
At Universities:
  1. The Year of Mathematics Lecture, Mathematics and Technology Series, Department of Applied Mathematics, Universidad Politecnica de Madrid, Friday, May 12, 2000, "Aplicaciones del teorema de Erdos-Nagy a robotica, fisica de polimeros y biologia molecular."
  2. The LIMDA Seminar, (Laboratorio de Investigacion en Matematica Discreta y Algoritmica), Department of Applied Mathematics, Universidad Politecnica de Catalunya, Barcelona, Thursday, May 4, 2000, "Recent Results on Untangling Unknots in Space."

1999

At Conferences:
  1. VIII Encuentros de Geometria Computacional, Castellon, Spain, July 7-9, 1999, "Computational Polygonal Entanglement Theory."
At Universities:
  1. Computer Science Seminar, University of New Brunswick, Fredericton, August 31, 1999, "The Erdos-Nagy Theorem and its Applications to Knot Theory, Polymer Physics and Molecular Biology."
  2. Computer Science Seminar, Carleton University, Ottawa, April 30, 1999, "Untangling Polygonal Linkages."
  3. Geometry Seminar, Department of Mathematics, Courant Institute, New York University, April 20, 1999, "Untangling Polygonal Linkages."
  4. Computer Science Seminar, University of Quebec in Montreal, April 9, 1999, "Untangling Polygonal Linkages."

1998

At Conferences:
  1. Sixth Annual Meeting of the Belgian Statistical Society, Ol Fosse d'Outh, Houffalize, Belgium, October 8-9, 1998, "Computational Geometry for Document Analysis."
At Universities:
  1. ACM Seminar, School of Computer Science, McGill University, Montreal, November 25, 1998, "Mobility of Objects in Space."
  2. Seminar, Department of Applied Mathematics II, University of Sevilla, Spain, May 26, 1998, "Mobility of Objects in Space."

1997

At Conferences:
  1. 924th Meeting of the American Mathematical Society, Montreal, Quebec, Canada, September 26-28, 1997, "Constrained Facility Location."
  2. VII Encuentros de Geometria Computacional, Madrid, July 7-9, 1997, "Eliminacion de Degeneraciones en Geometria Computacional."
At Universities:
  1. Seminar, School of Computer Science, McGill University, Montreal, Canada, November 19, 1997, "The Constrained Minimum Spanning Circle Problem."
  2. Seminar, School of Computer Science, Carleton University, Ottawa, Canada, November 13, 1997, "Constrained Facility Location."
  3. Seminar, Department of Mathematics and Computer Science, University of Quebec, Trois-Rivieres, Canada, April 9, 1997, "On Removing Non-Degeneracy Assumptions in Computational Geometry."
  4. Computer Science Colloquium, University of Minnesota, Minneapolis, Minnesota, U.S.A., March 3, 1997, "On Removing Non-Degeneracy Assumptions in Computational Geometry."

1996

At Conferences:
  1. 914th Meeting of the American Mathematical Society, Lawrenceville, New Jersey, USA, October 5-6, 1996, "On Removing Degeneracies in Computational Geometry ."
  2. Carleton Algorithmic Theory Symposium, Ottawa, Canada, September 28, 1996, "On Removing Degeneracies in Computational Geometry ."
  3. Conference on Facility Location, University of Sevilla, Spain, April 22-23, 1996, "Computational Geometry and Facility Location ."
At Universities:
  1. Computational Geometry Seminar, Dept. of Applied Mathematics II, Universidad Politecnica de Catalunya, Barcelona, Spain, July 10, 1996, "Removing Degeneracies in Computational Geometry."
  2. Computational Geometry Seminar, Dept. of Applied Mathematics II, Universidad Politecnica de Catalunya, Barcelona, Spain, July 3, 1996, "Facility Location."
  3. Computational Geometry Seminar, Dept. of Applied Mathematics II, Universidad Politecnica de Catalunya, Barcelona, Spain, June 18, 1996, "Mobility of Objects in Space - II."
  4. Computational Geometry Seminar, Dept. of Applied Mathematics II, Universidad Politecnica de Catalunya, Barcelona, Spain, June 12, 1996, "Mobility of Objects in Space - I."
  5. Computational Geometry Seminar, Dept. of Applied Mathematics II, Universidad Politecnica de Catalunya, Barcelona, Spain, June 5, 1996, "Computing Shortest Transversals of Planar Sets."
  6. Computational Geometry Seminar, Dept. of Applied Mathematics II, Universidad Politecnica de Catalunya, Barcelona, Spain, May 29, 1996, "Triangulating a Simple Polygon Efficiently in Practice."
  7. Computational Geometry Seminar, Dept. of Applied Mathematics II, Universidad Politecnica de Catalunya, Barcelona, Spain, May 22, 1996, "Proximity Graphs and Applications."
  8. Computational Geometry Seminar, Dept. of Applied Mathematics, Universidad Politecnica de Madrid, Spain, May 8, 1996, "Removing Degeneracies in Computational Geometry."
  9. Computational Geometry Seminar, Dept. of Applied Mathematics, Universidad Politecnica de Madrid, Spain, April 30, 1996, "Facility Location."
  10. Conference on Computational Geometry and Facility Location, Universidad de Sevilla Spain, April 22, 1996, "Facility Location and Computational Geometry."
  11. Computational Geometry Seminar, Dept. of Applied Mathematics, Universidad Politecnica de Madrid, Spain, April 17, 1996, "Mobility of Objects in Space - II."
  12. Computational Geometry Seminar, Dept. of Applied Mathematics, Universidad Politecnica de Madrid, Spain, April 12, 1996, "Mobility of Objects in Space - I."
  13. Computational Geometry Seminar, Dept. of Applied Mathematics, Universidad Politecnica de Madrid, Spain, April 10, 1996, "Aperture-Angle Optimization in Two and Three Dimensions."
  14. Computational Geometry Seminar, Dept. of Applied Mathematics, Universidad Politecnica de Madrid, Spain, March 26, 1996, "Computing Shortest Transversals of Planar Sets."
  15. Computational Geometry Seminar, Dept. of Applied Mathematics, Universidad Politecnica de Madrid, Spain, March 22, 1996, "Quadrangulations of Planar Sets."
  16. Computational Geometry Seminar, Dept. of Applied Mathematics, Universidad Politecnica de Madrid, Spain, March 20, 1996, "Proximity Graphs and Their Applications."
  17. Computational Geometry Seminar, Dept. of Applied Mathematics, Universidad Politecnica de Madrid, Spain, March 13, 1996, "Efficient Triangulation of Planar Sets."
In Industry:
  1. INRIA, Sophia-Antipolis, France, July 26, 1996, "Removing Degeneracies in Computational Geometry."

1995

At Conferences:
  1. Computational Geometry Day, University of Newcastle, Australia, November 29, 1995, "Drawing Nice Projections of Objects in Space ."
  2. 4th International Workshop on Algorithms and Data Structures, Kingston, Canada, August 16-18, 1995, "Quadrangulations of Planar Sets."
  3. VI Encuentro de Geometria Computacional, Barcelona, Spain, July 5-7, 1995, "Quadrangulations."
At Universities:
  1. Computer Science Seminar, University of New South Wales, Australia, December 18, 1995, "Computing Quadrangulations of Sets."
  2. Electrical and Computer Engineering Seminar, University of Newcastle, Australia, November 20, 1995, "Movable Separability of Objects in Space ."
  3. Basser Department of Computer Science Seminar, University of Sydney, Australia, November 2, 1995, "Computing Quadrangulations of Sets."
  4. Computer Science Seminar, University of Newcastle, Australia, October 18, 1995, "Computing Quadrangulations of Sets."
  5. Computing Science Seminar, Simon Fraser University, Burnaby, Canada, June 15, 1995, "Quadrangulations of Planar Sets."
  6. Geometry Seminar, Courant Institute of Mathematical Sciences, New York University, New York, April 25, 1995, "Quadrangulations of Planar Point Sets."

1994

At Conferences:
  1. Third Annual Symposium on Document Analysis and Information Retrieval, Alexis Park Hotel, Las Vegas, Nevada, April 12, 1994 "Computational Geometry for Document Analysis."
  2. 892nd Meeting of the American Mathematical Society, Polytechnic University, Brooklyn, New York, April 10, 1994, "Some Aperture-Angle Optimization Problems."
  3. Twenty Third Computational Geometry Day, Courant Institute of Mathematical Sciences, New York University, March 11, 1994, "Geometric and Computational Aspects of Manufacturing Processes."
At Universities:
  1. Computing Science Seminar, School of Computing Science, Simon Fraser University, Burnaby, Canada, September 2, 1994, "Where Should You Sit in the Cinema so That Your Favorite Actor is as Tall as Possible?"
  2. GINTIC Institute of Manufacturing Technology, Nanyang Technological University, Singapore, July 11, 1994, "Geometric and Computational Aspects of Manufacturing Processes."
  3. Seminar, Department of Computer Science, National University of Singapore July 12, 1994, "Where Should You Sit in the Cinema so That Your Favorite Actor is as Tall as Possible?"
  4. Seminar, Department of Computer Science, University of Newcastle Australia, July 14, 1994, "Geometric and Computational Aspects of Manufacturing Processes."
  5. Seminar, Department of Computer Science, University of Newcastle Australia, July 15, 1994, "A New Look at Euclid's Second Proposition."
  6. Seminar, Department of Mathematics, University of Nevada at Reno, April 15, 1994, "A New Look at Euclid's Second Proposition."
  7. Seminar, Department of Electrical Engineering, University of Nevada at Reno, April 15, 1994, "Geometric and Computational Aspects of Manufacturing Processes."
  8. Seminar, Department of Computer Science, Howard R. Hughes College of Engineering, University of Nevada at Las Vegas, April 13, 1994, "Geometric and Computational Aspects of Manufacturing Processes."

1993

At Conferences:
  1. National Science Foundation Regional Geometry Institute, Smith College, Northampton, Massachussetts, July 12, 1993, "Triangulations and Arrangements."
  2. National Science Foundation Regional Geometry Institute, Smith College, Northampton, Massachussetts, July 12, 1993, "Computational Geometric Topics Suitable for High School."
  3. National Science Foundation Regional Geometry Institute, Smith College, Northampton, Massachussetts, July 13, 1993, "Separating Objects with Translations."
  4. National Science Foundation Regional Geometry Institute, Smith College, Northampton, Massachussetts, July 14, 1993, "Triangulating a Set of Line Segments."
  5. National Science Foundation Regional Geometry Institute, Smith College, Northampton, Massachussetts, July 14, 1993, "Computing Geometric Properties of Arrangements of Lines and Line Segments."
  6. IV Encuentro de Geometria Computacional, Granada, Spain, June 1, 1993, "Aproximación Poligonal de Curvas en dos y tres Dimensiones."
At Universities:
  1. Mechanical Engineering Department, Ecole Politechnique, University of Montreal, November 15, 1993, "Computational Geometric Problems Related to Injection Molding."
  2. Mathematics & Computer Science Colloquium, University of Vermont, Burlington, Vermont, November 12, 1993, "Movable Separability of Objects in Two and Three Dimensions."
  3. Mathematics & Computer Science Seminar, Middlebury College, Vermont, October 12, 1993, "Movable Separability of Objects in Two and Three Dimensions."
  4. Geometry Seminar, Department of Computer Science, Utrecht University, June 29, 1993, "Geometric and Computational Aspects of Injection Molding and Stereolithography."
  5. Pattern Recognition Colloquium, Department of Physics, Delft University of Technology, June 28, 1993, "Geometric and Computational Aspects of Injection Molding and Stereolithography."
  6. Department of Applied Mathematics II, Universidad Politecnica de Catalunya, Barcelona, Spain, June 17, 1993, "Aspectos Geometricos y Computacionales de la Inyección en Moldes y de la Estereolitografia."
  7. Department of Applied Mathematics, Universidad Politecnica de Madrid, Spain, June 10, 1993, "Arreglos de Rectas."
  8. Seminar, Faculty of Mathematics and Computer Science, University of Amsterdam, May 28, 1993, "Approximating Polygonal Curves in Two and Three Dimensions."
In Industry:
  1. IBM Software Solutions Toronto Laboratory, The Centre for Advanced Studies, North York, Ontario, December 10, 1993, "Geometric and Computational Aspects of Manufacturing Processes."
  2. Bell Northern Research, Nun's Island, Montreal, May 12, 1993, "The Application of Proximity Graphs to Edited Nearest Neighbor Decision Rules."

1992

At Conferences:
  1. Canadian Conference on Electrical and Computer Engineering, Toronto, Canada, September 14, 1992, "The Use of Proximity Graphs in Image Analysis and Computer Vision."
  2. Séptimo Coloquio de Teoría de las Gráficas, Combinatoria y sus Aplicaciones, Universidad Autónoma de Zacatecas, México, February 27, 1992, "Aplicación de la Teoría de Gráficas a la Aproximación Poligonal de Curvas."
At Universities:
  1. Seminar, Department of Mathematics, City University of New York, York College, Jamaica, N.Y., September 25, 1992, "Separability of Sets of Objects in Two and Three Dimensions."
  2. Seminar, Department of Computer Science, York University, North York, Ontario, September 15, 1992, "Separability of Sets of Objects in Two and Three Dimensions."
  3. Colloquium, Department of Mathematics and Computer Science, University of Tulsa, Okla., July 14, 1992, "Separability of Sets of Objects in Two and Three Dimensions."
  4. The Guillermo Torres Seminar on Topology and Geometry, Institute of Mathematics, Universidad Nacional Autónoma de México, México City, June 25, 1992, "Separabilidad de Objetos Mediante Translaciones en dos y tres Dimensiones."
  5. Research Seminar, Department of Applied Mathematics II, Universidad Politecnica de Catalunya, Barcelona, June 8, 1992, "Open Problems in Computational Geometry."
  6. Seminar on Software Mathematics and Computational Mathematics, Department of Applied Mathematics II, Universidad Politecnica de Catalunya, Barcelona, June 5, 1992, "Separabilidad de Objetos Mediante Movimientos en el Plano y el Espacio Tridimensional."
  7. Colloquium, Department of Mathematics, Universidad Politecnica de Madrid, June 4, 1992, "Separabilidad de Objetos Mediante Movimientos en el Plano y el Espacio Tridimensional."
  8. Research Seminar, Department of Mathematics, Universidad Politecnica de Madrid, June 3, 1992, "Computational Geometry at McGill University."
  9. Colloquium, Department of Mathematics and Computer Science, University of Quebec in Montreal, May 7, 1992, "Movable Separability of Sets in Two and Three Dimensions."
  10. Mathematics Colloquium, Departments of Mathematics, Statistics, Computer Science and Electrical Engineering, University of Vermont, Burlington, Vermont, USA, April 10, 1992, "A New Look at Euclid's Second Proposition."
  11. Seminar, McGill Research Center for Intelligent Machines, McGill University, Montreal, Canada, January 29, 1992, "Movable Separability of Objects in Two and Three Dimensions."
  12. Seminar, McGill Research Center for Intelligent Machines, McGill University, Montreal, Canada, January 22, 1992, "The Use of Proximity Graphs in Pattern Recognition."
In Industry:
  1. I.B.M. Thomas J. Watson Research Center, Yorktown Heights, N.Y., May 29, 1992, "Computing Geometric Properties of Arrangements of Lines and Line Segments."

1991

At Conferences:
  1. 2nd Japan International Symposium of the Society for the Advancement of Materials and Process Engineering, Chiba, Japan, December 14, 1991, "Computing Morphological Properties of Arrangements of Lines."
  2. The Fifth Annual Computer Science Days '91, Memorial University of Newfoundland, St. John's, Newfoundland, October 17-18, 1991, "Computing Shortest Transversals of Sets."
  3. IEEE Computer Society Conference on Computer Vision & Pattern Recognition, Lahaina, Maui, Hawaii, June 3-6, 1991, "Computational Geometry and Computer Vision."
  4. Sexto Coloquio de Teoría de las Gráficas, Combinatoria y sus Aplicaciones, Guanajuato, México, March 4-8, 1991, "Calculo de Propiedades Geometricas de Arreglos de Líneas."
At Universities:
  1. Computer Science Seminar, Division of Computer Science, Asian Institute of Technology, Bangkok, Thailand, January 8, 1991, "Polygonal Approximation of Curves and Applications."
  2. Information Science Seminar, Institute of Information Science, Academia Sinica, Taipei, Taiwan, Republic of China, December 19, 1991, "Computing Shortest Transversals of Sets."
  3. Seminar, Ottawa-Carleton Institute for Computer Science, Carleton University, November 7, 1991, "Computing Geometrical Properties of Arrangements of Lines."
  4. Séminaire en Informatique, Département d'Informatique, Université du Québec at Hull, November 6, 1991, "Computing Geometrical Properties of Arrangements of Lines."
  5. Seminar on the History and Philosophy of Science, Department of Psychology, McGill University, September 30, 1991, "The Role of Visual and Kinesthetic Thinking in Geometry."
  6. Distinguished Seminar Series, Sesquicentennial Anniversary of Queens University, Department of Computing and Information Science, Kingston, Ontario, April 18, 1991, "A New Look at Euclid's Second Proposition."
  7. Distinguished Lecture Series, 225th Anniversary of Rutgers University, Computer Science Department Colloquium, New Brunswick, New Jersey, April 1st, 1991, "Computing Shortest Transversals of Sets."
  8. Colloquium, University of Waterloo, Department of Computer Science, Waterloo, March 22, 1991, "Computing Shortest Transversals of Sets."
  9. C & O Seminar, University of Waterloo, Department of Combinatorics and Optimization, Waterloo, March 21, 1991, "A New Look at Euclid's Second Proposition."
  10. Colloquium, University of Nevada at Las Vegas, Department of Computer Science, January 28, 1991, "Computing Shortest Transversals of Sets."

1990

At Conferences:
  1. Workshop on the Foundation of Computer Graphics, Asian Institute of Technology, Bangkok, Thailand, December 6-20, 1990, "Computational Geometric Aspects of Visibility."
  2. The 3rd Tokyo Algorithms Day, University of Tokyo, December 3, 1990, "Computing Geometric Properties of Line Arrangements."
  3. Fifteenth Computational Geometry Day, Courant Institute of Mathematical Sciences, New York University, New York, November 9, 1990, "Computing Extremal Transversals of Sets."
  4. 2nd Canadian Conference on Computational Geometry, University of Ottawa, August 6, 1990, "Computing Geometric Properties of Arrangements."
  5. Computer Graphics International'90, Singapore, June 26, 1990, "Computational Geometric Aspects of Illumination and Visibility."
  6. Third Cumberland Conference on Graph Theory and Applications to Computer Science, University of Louisville, Kentucky, May 17-19, 1990, "Graph theory, Computational Geometry, & Morphology."
  7. V Coloquio de Teoría de las Gráficas, Combinatoria y sus Aplicaciones, Universidad Michoacana de San Nicolas de Hidalgo, Casa de la Cultura, Morelia, México, March 2nd, 1990, "Gráficas de Proximidad en Problemas de Visión Computacional."
  8. V Coloquio de Teoría de las Gráficas, Combinatoria y sus Aplicaciones, Universidad Michoacana de San Nicolas de Hidalgo, Casa de la Cultura, Morelia, México, February 27, 1990, "Triangulacion de Poligonos."
At Universities:
  1. Colloquium, Simon Fraser University, Department of Computer Science, Burnaby, November 30, 1990, "A New Look at Euclid's Second Proposition."
  2. Colloquium, Simon Fraser University, Department of Computer Science, Burnaby, June 1, 1990, "Computing Geometric Properties of Arrangements.
In Industry:
  1. Nippon Telegraph and Telephone Corporation, Autonomous Robot Systems Laboratory, Tokyo, December 5, 1990, "Computational Geometric Aspects of Visibility."

1989

At Conferences:
  1. First Workshop on Proximity Graphs, New Mexico State University, December 2, 1989, "Some unsolved problems on proximity graphs."
  2. First Workshop on Proximity Graphs, New Mexico State University, Las Cruces, December 2, 1989, "Proximity graphs in computer vision."
  3.  Seventh International Conference of the Computer Graphics Society,  University of Leeds, United Kingdom, June 27-30, 1989, "Computational geometry: Recent developments".
  4. Meeting of the American Mathematical Society, Stevens Institute of Technology, Hoboken, New Jersey, October 22, 1989, "Computational geometry and computer vision."
At Universities:
  1. Colloquium, Ohio State University, Department of Computer and Information Science, Columbus, November 2, 1989, "Computing Minimal Spanning Covers of Sets."
  2. Colloquium, University of Amsterdam, Department of Computer Science, Amsterdam, July 6, 1989, "Determining Weak External Visibility of a Polygon."
  3. Colloquium, University of Amsterdam, Department of Computer Science, Amsterdam, July 6, 1989, "Computing Geodesic Properties of Polygons."
  4. Colloquium, University of Amsterdam, Department of Computer Science, Amsterdam, June 22, 1989, "A Hierarchy of Polygons That Admit Linear-Time Triangulation."
  5. Colloquium, University of Amsterdam, Department of Computer Science, Amsterdam, June 22, 1989, "An Output-Complexity-Sensitive Polygon Triangulation Algorithm."
  6. Colloquium, University of Amsterdam, Department of Computer Science, Amsterdam, June 15, 1989, "Separating Two Simple Polygons by a Single Translation."
  7. Colloquium, University of Amsterdam, Department of Computer Science, Amsterdam, June 1, 1989, "Determining Edge-to-Edge Visibility in a Polygon."
  8. Colloquium, University of Amsterdam, Department of Computer Science, Amsterdam, June 1, 1989, "Computing Distances Between Sets."
  9. Colloquium, University of Amsterdam, Department of Computer Science, Amsterdam, May 25, 1989, "Computing the Convex Hull of a Set."
  10. Colloquium, University of Amsterdam, Department of Computer Science, Amsterdam, May 25, 1989, "Computing the Diameter of a Set."
  11. Colloquium, University of West Indies, Department of Mathematics, Cave Hill, Barbados, February 22, 1989, "A Hierarchy of Polygons That can be Triangulated in Linear Time."
  12. Colloquium, University of West Indies, Department of Mathematics, Cave Hill, Barbados, February 15, 1989, "An Output-Complexity Sensitive Polygon Triangulation Algorithm."

1988

At Universities:
  1. Colloquium, Algorithms Group Seminar, Simon Fraser University, School of Computing Science, Burnaby, November 25, 1988, "On Determining the Weak Visibility of a Polyhedral Terrain From a Line."
  2. Colloquium, University of Washington, Department of Computer Science, Seattle, October 19, 1988, "On Triangulating Simple Polygons."
  3. Colloquium, University of British Columbia, Department of Computer Science, Vancouver, September 29, 1988, "On Triangulating Simple Polygons."
  4. Colloquium, University of Victoria, Computer Science Department, Victoria, September 16, 1988, "On Triangulating Simple Polygons."
  5. DARTS Lecture (Distinguished Advanced Research and Technology Seminar) Simon Fraser University, School of Engineering Science, Burnaby, September 15, 1988, "Computational Geometry and Robotics."
  6. Colloquium, Simon Fraser University, School of Computing Science, Burnaby, August 10, 1988, "On Triangulating Simple Polygons."
In Industry:
  1. MacDonald, Dettwiler & Associates, Richmond, B.C., November 9, 1988, "Computational Geometry and Geographic Information Systems."

1987

At Conferences:
  1. 13th IFIP Conference on System Modelling and Optimization, Tokyo, Japan, Sept.1st., 1987, "Relative Convex Hulls of Sets and their Applications."
  2. Workshop on Computational Geometry and Discrete Algorithms, Osaka Electro-Communication University, Osaka, Japan, Sept. 5, 1987, "Relative Convex Hulls of Sets and their Applications."
At Universities:
  1. University of Tokyo, Computer Science Department (c/o Prof. Kunii), Sept. 3, 1987, "Relative Convex Hulls of Sets and their Applications."
  2. Simon Fraser University, Computer Science Department, Vancouver, August 28, 1987, "Relative Convex Hulls of Sets and their Applications."
  3. Carleton University, School of Computer Science, Ottawa, October 30, 1987, "Relative Convex Hulls of Sets and their Applications."

1986

At Universities:
  1. Mathematics Seminar, University of Ioannina, Ioannina, Grece, June 27, 1986, "Voronoi Diagrams and Decision Rules."

1985

At Universities:
  1. Computer Science Seminar, Carleton University, Ottawa, Canada, February 28, 1985, "Some Collision Avoidance Problems in the Plane."

1984

At Conferences:
  1. Computer Science and Statistics: 16th Symposium on the Interface, Atlanta, U.S.A., March 1984, G.T. Toussaint, B.K. Bhattacharya, and R.S. Poulsen, "The Application of Voronoi Diagrams to Nonparametric Decision Rules."
At Universities:
  1. Computer Science Colloquium, University of Maryland, College Park, U.S.A., April 26, 1984, "Some Collision Avoidance Problems in the Plane."

1983

At Conferences:
  1. IEEE International Symposium on Information Theory, St. Jovite, Canada, September, 1983, "The Complexity of Movement."
  2. IEEE International Symposium on Information Theory, St. Jovite, Canada, September, 1983, "On Geometric Algorithms That use the Furthest Point Voronoi Diagram."
At Universities:
  1. Computer Science Colloquium, Kyoto University, Kyoto, Japan, December 26, 1983, "Some Collision Avoidance Problems in the Plane."
  2. Electrical, Engineering Colloquium, University of Nagoya, Japan, December 29, 1983, "Some Collision Avoidance Problems in the Plane."
  3. Mathematical Engineering Colloquium, University of Tokyo, Japan, December 16, 1983, "Some Collision Avoidance Problems in the Plane."
  4. Computer Science Colloquium, Concordia University, Montreal November 1983, "Some Collision Avoidance Problems in the Plane."
  5. Systems Science Colloquium, University of Toronto, February 1983, "Recent Results in Computational Geometry."
In Industry:
  1. Hitachi Central Research Laboratory, Tokyo, Japan, December 22, 1983, "Some Collision Avoidance Problems in the Plane."

1982

At Conferences:
  1. 86th Summer Meeting of the American Mathematical Society, August 21-26, 1982, Toronto, "Distance and Visibility Problems in Computational Geometry."
At Universities:
  1. Mathematics Guest Lecture, Fairfield University, Fairfield, Connecticut, November 2, 1982, "Some Recent Results in Computational Geometry."
  2. Psychology Colloquium, Carleton University, Ottawa, October 18, 1982, "The Computation and Perception of Shapes."
  3. Mathematics Colloquium, University of Genova, Italy, June 1982, "Efficient Algorithms for Computing Distances Between Sets."
  4. Computer Science Colloquium, University of Torino, Italy, June 1982, "Efficient Algorithms for Computing Distances Between Sets."
In Industry:
  1. Bell Northern Research, Nun's Island, Verdun, October 29, 1982, "Graph-theoretic Methods for Edited Nearest Neighbor Decision Rules,"

1981

At Conferences:
  1. NATO Avanced Study Institute on Pattern Recognition Theory and Practice, Oxford University, April 1981, "Computational Geometric Problems in Pattern Recognition."
At Universities:
  1. Colloquia Estria, Département de Mathématiques et d'informatique, Université de Sherbrooke, 26 mars, 1981, "Problèmes en Géométrie Algorithmique,"
  2. Computer Science Seminar, University of British Columbia, Vancouver, Feb. 6, 1981, "Pattern Recognition and Geometrical Complexity."
In the Comminuty:
  1. Herzliah High School, invited speaker at the awards-ceremonies of the First Montreal High-School Computer Programming Competition, May 3, 1981, "Computer Applications in Artificial Intelligence."

1980

At Conferences:
  1. Fifth International Conference on Pattern Recognition, Miami, December 1980, Plenary Speaker,"Pattern Recognition and Geometrical Complexity."
At Universities:
  1. Computing and Information Science Seminar, Queen's University, Kingston, Ontario, November 5, 1980, "Pattern Recognition and Geometrical Complexity."
  2. Computing and Information Science Seminar, Queen's University, Kingston, Ontario, March 26, 1980, "The Relative Neighborhood Graph of a Finite Planar Set."

1979

At Universities:
  1. Séminaire d'Informatique Heuristique, Université de Paris, (Pierre et Marie Curie), June 11, 1979, "Pattern Recognition and Geometrical Complexity: Placing an Elastic Band Around a Group of Pegs."
  2. Systems Theory Seminar, University of Louvain (La Neuve), Belgium, June 8, 1979, "Pattern Recognition and Geometrical Complexity: Placing an Elastic Band Around a Group of Pegs."
  3. Electrical Engineering Seminar, Delft University of Technology, The Netherlands, June 5, 1979, "Using Contextual Information to Improve the Performance of Character Recognition Machines."
  4. Department of Applied Physics Seminar, Delft University of Technology, The Netherlands, June 1, 1979, "Pattern Recognition and Geometrical Complexity: Placing an Elastic Band Around a Group of Pegs."

1978

At Universities:
  1. Computer Science Colloquium, University of Connecticut, October 13, 1978, "The Convex Hull as a Tool in Pattern Recognition."
  2. Computing Center and Computer Science Colloquium, State University of New York at Buffalo, October 6, 1978, "The Convex Hull as a Tool in Pattern Recognition."

1977

At Conferences:
  1. IEEE Conference on Pattern Recognition and Image Processing, June 1977, Troy, N.Y., Plenary Speaker, "The Use of Context in Pattern Recognition."

1976

At Universities:
  1. University of Montreal, April 1st, 1976, "Using Contextual Information to Improve the Performance of Character Recognition Machines."

1975

At Universities:
  1. Clarkson College of Technology, December 4, 1975, "Using Contextual Information to Improve the Performance of Character Recognition Machines."
  2. Department of Electrical Engineering, McGill University, March 13, 1975, "The Use of Statistical Language Constraints in Machine Recognition of Hand Printed English Text."

1974

At Conferences:
  1. Conference on Measures of Information and their Application, August 1974, Bombay, India, "On Some Measures of Information and their Application to Pattern Recognition."
  2. Second International Joint Conference on Pattern Recognition, Plenary Speaker, August 1974, Copenhagen, Denmark, "Recent Progress in Statistical Methods Applied to Pattern Recognition."
At Universities:
  1. Computer Science Department, Simon Fraser University, Spring, 1974, "The Use of Statistical Language Constraints to Improve the Performance of Character Recognition Machines."

1973

At Universities:
  1. Département d'Informatique, Université de Montreal, Spring, 1973, "Distance Measures as Measures of Certainty and Their Application to Pattern Recognition."

"A good preparation takes longer than the delivery." - Nebeuts E. Kim