Oggy Oggy Oggy at Cornish rugby matches so this seem another possible origin. The Oxford English Dictionary (2004) entry for "Oggy" states: "Oggy, "noun". "West Country regional" (orig. "Cornwall") and "Navy" slang. A Cornish pasty. Probably an alteration of Cornish "hoggan" pastry, pie (18th century), perhaps cognate with Welsh "chwiogen" muffin, simnel cake (1562), of unknown origin." Members of the Royal Navy claim to have used the chant, or a version of it, since the Second World War. The 'Oggie, Oggie, Oggie' chant was used by supporters of the Royal Navy's Devonport Field Gun Team. (The field gun competition was disbanded in 1999
Item-item collaborative filtering Earlier collaborative filtering systems based on rating similarity between users (known as user-user collaborative filtering) had several problems: Item-item models resolve these problems in systems that have more users than items. Item-item models use rating distributions "per item", not "per user". With more users than items, each item tends to have more ratings than each user, so an item's average rating usually doesn't change quickly. This leads to more stable rating distributions in the model, so the model doesn't have to be rebuilt as often. When users consume and then rate an item, that item's similar items are picked from