Skillet (band) program on a summer missions trip with teenagers to Mexico. In 2008, they joined Teen Mania Ministries and toured with Acquire the Fire. Skillet joined Breaking Benjamin, Three Days Grace, and Seether on the first half of their tour in fall 2007. Then Skillet headlined their own "Comatose" Tour alongside Thousand Foot Krutch and traveled to approximately 30 cities. The tour started on March 28 and ran through May 11, 2008. Skillet toured again from April 2009 through June 2009 with Decyfer Down and Disciple. This tour was called Comatose Tour 2009 (essentially a second branch of the 2008 Comatose
Item-item collaborative filtering 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 on the similarity between items calculated using people's ratings of those items. Item-item collaborative filtering was invented and used by Amazon.com in 1998. It was first published in an academic conference in 2001. The authors of that paper, Badrul Sarwar, George Karypis, Joseph Konstan, and John Riedl, won the 2016 "Test of Time Award" for their paper "Item-based collaborative filtering recommendation algorithms". The International World Wide Web Conference committee stated that "this outstanding paper has had a considerable real-world impact".