فهرس المقالات user cold start حرية الوصول المقاله صفحة الملخص نص كامل 1 - A Novel Method for Improving Cold Start Challenge in Recommender Systems through Users Demographics Information Taravat Abedini Alireza Hedayati Ali Harounabadi 10.30495/ijm2c.2023.1962562.1256