*Kneser's Algorithm*, 13.12.2021, Linz Algebra Research Day*3R Positional Robots*, 14.06.2021, Online Scientific Meeting*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, DFG-Seminar Reelle Algebraische Geometrie University of Passau, Passau, Germany.*Weil Pairings of Elliptic Curves*, 09.12.2004, DFG-Seminar Reelle Algebraische Geometrie University of Passau, Passau, Germany.*Weil Pairings of Elliptic Curves*, 01.24.2004, Oberseminar Komplex Analysis, Ludwig Maximillian University, Munich, Germany.

*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.