1. Department of Mathematics, Gebze Institute of Technology, Kocaeli, 41400 Gebze, Turkey
2. Department of Information Systems and Technologies, Yeditepe University, Atasehir, 34755 Istanbul, Turkey
3. Department of Computer Education and Instructional Technology, Yeditepe University, Atasehir, 34755 Istanbul, Turkey
4. Department of Physics, Yeditepe University, Atasehir, 34755 Istanbul, Turkey
5. Department of Physics, Bogazici University, Bebek, 34342 Istanbul, Turkey