Ultraviolet radiation (UVR) has been identified as the primary etiologic agent for the induction and promotion of most skin cancers. The first associations between solar UVR and skin cancer were acknowledged by the scientific community in 1927. Since then, increasing evidence for the role of UVR in the causation of skin cancer has resulted in the listing of solar and artificial UVR as a human c...

Nowadays, university students suffer from a broad range of problems, such as educational underachievement or the inability to control themselves, that lead to procrastination as a consequence. The present research aimed at analyzing the determinants of decisional procrastination among undergraduate students and at assessing a path model in which self regulated learning strategies mediated the r...

drug abuse and its crimes is one of the biggest problems in all countries, including iran. according to available statistics more than half of the prisoners in connection with drug remain in jail as increasing numbers of addicts and various anomalies of addiction in the community marker lack of effectiveness of the preventive measures taken in the country. accordingly, given the need to determi...