Studying Smartphone Usage: Lessons from a Four-Month Field Study 

Bending Collapse of Thin Walled Energy Absorber and Presenting Numerical Simplified Model 

تخریب خمشی جاذب‌های انرژی جدار نازک و ارائۀ مدل ساده‌شدۀ عددی

A longitudinal study of emoticon use in text messaging from smartphones