Mathematical
 Implementing HuPf with 6R/P Manipulators, 07.06.2019, Conference on Geometry Theory and Applications, Innsbruck, Austria

Sum of Squares over Rationals, 08.11.2018, Computer Algebra Seminar, Research Institute for Symbolic Computation, Hagenberg, Austria.
 An Overview of (some) Mathematical Problems in Robotics, 08.06.2018, Oberseminar Reelle Geometrie und Algebra, Universität Konstanz, Konstanz, Germany
 Generalizing concepts in field theory to rings, 03.11.2016 and 10.11.2016, Computer Algebra Seminar, Research Institute for Symbolic Computation, Hagenberg, Austria.
 Generalizing Some Results in Field Theory for Rings, 19.10.2016, Second International Workshop and Conference in Commutative Algebra, Tribhuvan University, Kathmandu, Nepal.
 Sufficiency sets for the Collatz conjecture 09.06.2016, LARD Seminar, Research Institute for Symbolic Computation, Hagenberg, Austria.
 A short result on the Collatz conjecture, 20.01.2016, University of the Philippines, Diliman, Quezon City, Philippines.
 A mathematical motivation for industrial robotic motion planning, 23.05.2014, Doctoral Program, Computational Mathematics Numerical Analysis and Symbolic Computation, Johannes Kepler University, Linz, Austria.
(Slides,
Paper
).
 A motivational talk in real algebraic geometry, 07.12.2009, University of the Philippines, Diliman, Quezon City, Philippines
 Real closed rings and real closed * rings, 06.2006, DFG Seminar, University of Regensburg, Regensburg, Germany.
 Crash Course in Category Theory, 06.2006, DFG Seminar, University of Regensburg, Regensburg, Germany.
 Real closed * rings, 05.2006, DFG Seminar, University of Passau, Passau, Germany
 Real Sheaf Structures of Partially Ordered Rings, 12.04.2006,
DFGSeminar Reelle Algebraische Geometrie
University of Passau, Passau, Germany.
 Weil Pairings of Elliptic Curves, 09.12.2004,
DFGSeminar Reelle Algebraische Geometrie
University of Passau, Passau, Germany.
 Weil Pairings of Elliptic Curves, 01.24.2004,
Oberseminar Komplex Analysis,
Ludwig Maximillian University, Munich, Germany.
Nonmathematical
 RRT Planner for the Binpicking Problem
(pdf,
ppt),
International Workshop on Robot Motion and Control (RoMoCo) 2013, Wasowo Palace, Poland. Presented: 04.07.2013.
 The Determination of Optimum CeO_{2} Loading on Al_{2}O_{3
} for CO Oxidation and the Reactivity of C_{3}H_{6} to the Optimum Loading,
03.1998, Chemical Engineering Presentations, De La Salle University, Manila, Philippines.