List of Articles Non-negative matrix factorization Open Access Article Abstract Page Full-Text 1 - A Novel Method Based on Non-Negative Matrix Factorization for Dimensions Reduction Mehdi Hosseinzadeh Aghdam مرتضی آنالویی Jafar Tanha Open Access Article Abstract Page Full-Text 2 - Predicting ratings in recommender systems considering the dynamics of users’ preferences dynamics and changes in items' characteristics Hamidreza Tahamsbi