Bohemian style was not really until the First World War that "many working women ... embarked on a revolution in fashion that greatly reduced the weight and restrictions imposed on them by their clothing". Some women working in factories wore trousers and the brassiere (invented in 1889 by the feminist Herminie Cadolle and patented in America by Mary Phelps Jacob in 1914) began gradually to supersede the corset. In shipyards "trouser suits" (the term, "pantsuit" was adopted in America in the 1920s) were virtually essential to enable women to shin up and down ladders. Music hall artists also helped to push 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