List of Articles technical challenges Open Access Article Abstract Page Full-Text 1 - Identifying virtual teaching-learning challenges in primary education mohamadreza farajzadeh nooredin mirzaei naghi kamali Open Access Article Abstract Page Full-Text 2 - An Investigation of the Challenges in Implementing Business Process Reengineering in Governmental Organization Agencies Mohsen Khon Siavash Mahtab Mohammadi