Martha Rianna Physics Department, FMIPA Universitas Sumatera Utara - Medan Indonesia Indonesia
Herty Afrina Sianturi Physics Department, FMIPA Universitas Sumatera Utara - Medan Indonesia
Hariyati Lubis Civil Engineering, Faculty of Engineering, Universitas Amir Hamzah – Medan Indonesia
Awan Pelawi Radiology Instalation, Pringadi Hospital – Medan Indonesia
Timbangen Sembiring Physics Department, FMIPA Universitas Sumatera Utara – Medan Indonesia
Marhaposan Situmorang Physics Department, FMIPA Universitas Sumatera Utara – Medan Indonesia