Hero (Skillet song) Hero (Skillet song) "Hero" is the first single of the 2009 album "Awake" by the American Christian rock band Skillet and is the first track on the album. The song talks about mankind's need for a hero with the hero being Jesus Christ. It is the fourth single by Skillet to be released to physical media. The single sold 12,000 copies in its first week. It was used in a promo on NBC for the 2009 NFL Kickoff game between the Pittsburgh Steelers and the Tennessee Titans, as well as the Week 17 Sunday Night Football game between the Cincinnati
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