Skillet (band) during September and October 2016. In December 2016, a 27-city, second leg of the tour was announced. Opening for Skillet on this second leg were Sick Puppies and Devour the Day. In 2017, Skillet opened for Korn and Stone Sour on the second half of The Serenity of Summer Tour which started in Syracuse, New York on July 19 and finished in Cleveland, Ohio August 2. Starting November 5, 2017, Skillet joined Britt Nicole, Colton Dixon, Tauren Wells, and Gawvi for five shows on the Air1 Hits Tour across the central United States. In 2018, Skillet headlined the Winter Jam
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".