Andreas Widjaja has a motto: “Success = 0.02% Talent + 99.98% Hard Work, as derived from Einstein and Edison quotes.” He has a passion for teaching, as his extensive 20 years of teaching experience at various levels of education, ranging from high school, undergraduate to postgraduate level. After he finished his undergraduate at Institut Teknologi Bandung, he continued his study at Faculty of Mathematics and Natural Sciences, University of Groningen, the Netherlands, where he completed his M.Sc. followed by his PhD in 2007. Since that, he joined the Faculty of Information Technology of Maranatha Christian University until now.


Dr. Widjaja has previous research in the field of physics, mathematical modeling and numerical computations, where he applied computational techniques to solve problems in physics, astronomy, quantum computing, materials science and engineering. His current research interests are including numerical algorithms and machine learning.

  • Matematika Informatika (Introduction to Logic)
  • Matematika Diskrit (Discrete Mathematics)
  • Statistika (Statistics)
  • Aljabar Linier dan Matriks (Elementary Linear Algebra)
Previous Teaching
  • Metode Numerik (Numerical Methods)
  • Metode Kuantitatif Bisnis (Quantitative Methods for Business)
  • Analisis Algoritma (Analysis of Algorithms)
  • Computer Programming for Mathematics and Physics
  • Calculus
  • Engineering Mechanics
  • Engineering Mathematics
  • Matematika SMA (Mathematics for High School)
  • Fisika SMA (Physics for High School)
Professional Memberships
  • Masyarakat Komputasi Indonesia (Indonesian Computational Society), No: 1080618777.
  • Himpunan Fisika Indonesia (Indonesian Physical Society), No: 1075173946.
  • Andreas Widjaja, Social Media and Community Well-being, Konferensi Nasional Community Well Being, Universitas Kristen Maranatha, September 2015.
  • Andreas Widjaja, Erik Van der Giessen and Alan Needleman, Discrete dislocation analysis of wedge indentation of polycrystals, Acta Materialia, Volume 55, Issue 19, November 2007, Pages 6408-6415. DOI:
  • Andreas Widjaja, Erik Van der Giessen, Vikram S. Deshpande, Alan Needleman, Contact area and size effects in discrete dislocation modeling of wedge indentation, Journal of Materials Research, Volume 22, Issue 3, March 2007, Pages 655-663. DOI:
  • Andreas Widjaja, Alan Needleman and Erik van der Giessen, The Effect of Indenter Shape on Sub-Micron Indentation according to Discrete Dislocation Plasticity, Modelling and Simulation in Materials Science and Engineering, Volume 15, Special Issue, January 2007, Pages S121-S131. DOI:
  • Andreas Widjaja, Erik Van der Giessen and Alan Needleman, Discrete dislocation modeling of submicron indentation, Materials Science and Engineering A, Volumes 400-401, 25 July 2005, Pages 456-459. Dislocations 2004. DOI:
  • Andreas Widjaja, Erik Van der Giessen, Vikram S. Deshpande and Alan Needleman, On Contact and Size Effects in Discrete Dislocation Modelling of Wedge Indentation, Proceeding of Multiscale Materials Modelling 2006 Conference, Sep 18-22, 2006, Freiburg, Germany.
  • Iratius Radiman, Chatief Kunjaya and Andreas Widjaja, Periodic Determination of the Annual Variation of Regressions of the Martian Polar Caps using the Methods of Artificial Neural Network, Jurnal Matematika & Sains, Vol. 4 Edisi Khusus No. 2, Jun 1999, Institut Teknologi Bandung.
  • Iratius Radiman, Chatief Kunjaya and Andreas Widjaja, On the Periodical Nature of Annual Variation of the Regressions of the Martian Polar Caps Using the Phase Dispersion Minimization – (PDM) Method, Jurnal Matematika & Sains, Vol. 3 No. 2, Oct 1998, p69–78, Institut Teknologi Bandung.
  • Andreas Widjaja, Phase Dispersion Minimization for Windows (PDMWIN) Version 3.0: A Software Tool for Determining Period of Time Series, Variable Stars Network (VSNET), Kyoto University, Japan.