Reggie Davidrajuh has a Bachelor's study in Physics, a Master's degree in Control Systems, and a Ph.D. in Industrial Engineering (awarded by the Norwegian University of Science and Technology). Also, he has a [...]. (habilitation) degree in Information Science (AGH University of Science and Technology) and one more Ph.D. in Mechanical Engineering (Silesian University of Technology). He is presently a professor of Informatics at the University of Stavanger, Norway, and holds a visiting professor position at the Silesian University of Technology, Poland. He has published two books so far. "Modeling Discrete-Event Systems with GPenSIM: An Introduction" in 2018 and "Petri Nets for Modeling of Large Discrete Systems" in 2022, both published by Springer. He serves on the editorial committees of many journals and has published over 150 publications in diverse areas such as supply chain, e-commerce, e-government, modeling and simulation, discrete-event systems, green power generation, etc.

Introduction to GPenSIM.- PART I: Colored Petri Nets.- Colored Petri Nets.- Modeling Classical Problems with Colored Petri Nets.- Token Selection from multiple Input Places.- Token Selection based on Time.- Token Selection based on Cost.- PART-II: GPenSIM Resources.- GPenSIM Resources.- Activity-Oriented Petri Nets.- Costs of Resource Usage.- PART-III: Data Structures and Conclusion.- Run-Time Data Structures in GPenSIM.- GPenSIM: current applications and further development.