Skillet (band) nominated and won a Dove Award for Rock Song of the Year for their song "Sick of It". "Vital Signs", a compilation album released exclusively in Europe, was released October 13, 2014. On February 16, 2015 Skillet announced they were writing material for a new album with recording to begin in June with a potential release in the late half of 2015 or early 2016. On April 8, Skillet released a preview of a new song, later revealed to be called "Out of Hell", on their social media pages. On May 20, 2016 the album's title, "Unleashed", was announced and
Item-item collaborative filtering is analogous to "people who rate item X highly, like you, also tend to rate item Y highly, and you haven't rated item Y yet, so you should try it". Item-item collaborative filtering had less error than user-user collaborative filtering. In addition, its less-dynamic model was computed less often and stored in a smaller matrix, so item-item system performance was better than user-user systems. Slope One is a family of item-item collaborative filtering algorithms designed to reduce model overfitting problems. Item-item collaborative filtering Item-item collaborative filtering, or item-based, or item-to-item, is a form of collaborative filtering for recommender systems based