List of Articles COMSOL Multiphysics Open Access Article Abstract Page Full-Text 1 - A two-dimensional numerical model of a planar solid oxide fuel cell Norouz Mohammad Nouri Amin Mirahmadi Majid Kamvar Open Access Article Abstract Page Full-Text 2 - Analysis and Implementation of a New Method to Increase the Efficiency of Photovoltaic Cells by Applying a Dual Axis Sun Tracking System and Fresnel Lens Array meraj rajaee Sahel Rabiee 10.30495/jopn.2021.28531.1229