Invincible (Skillet album) Invincible (Skillet album) Invincible is the third studio album by American Christian rock band Skillet. It was released in 2000 from ForeFront Records and Ardent Records. This album continues the electronic rock that was heard on their previous release but marks the exit of original guitarist, Ken Steorts, and the entrance of his replacement, Kevin Haaland on guitar, as well as John Cooper's wife Korey on keyboards, loops, sampling and programming. All songs written by John L. Cooper, except where noted. There was a music video made for the song "Best Kept Secret". It was the first video by the
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